libs/ardour/route.cc

   1 /*
   2     Copyright (C) 2000 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 #ifdef WAF_BUILD
  21 #include "libardour-config.h"
  22 #endif
  23
  24 #include <cmath>
  25 #include <fstream>
  26 #include <cassert>
  27 #include <algorithm>
  28
  29 #include <boost/algorithm/string.hpp>
  30
  31 #include "pbd/xml++.h"
  32 #include "pbd/enumwriter.h"
  33 #include "pbd/memento_command.h"
  34 #include "pbd/stacktrace.h"
  35 #include "pbd/convert.h"
  36 #include "pbd/boost_debug.h"
  37
  38 #include "ardour/amp.h"
  39 #include "ardour/audio_buffer.h"
  40 #include "ardour/audio_port.h"
  41 #include "ardour/audioengine.h"
  42 #include "ardour/buffer.h"
  43 #include "ardour/buffer_set.h"
  44 #include "ardour/capturing_processor.h"
  45 #include "ardour/debug.h"
  46 #include "ardour/delivery.h"
  47 #include "ardour/internal_return.h"
  48 #include "ardour/internal_send.h"
  49 #include "ardour/meter.h"
  50 #include "ardour/midi_buffer.h"
  51 #include "ardour/midi_port.h"
  52 #include "ardour/monitor_processor.h"
  53 #include "ardour/pannable.h"
  54 #include "ardour/panner_shell.h"
  55 #include "ardour/plugin_insert.h"
  56 #include "ardour/port.h"
  57 #include "ardour/port_insert.h"
  58 #include "ardour/processor.h"
  59 #include "ardour/route.h"
  60 #include "ardour/route_group.h"
  61 #include "ardour/send.h"
  62 #include "ardour/session.h"
  63 #include "ardour/unknown_processor.h"
  64 #include "ardour/utils.h"
  65
  66 #include "i18n.h"
  67
  68 using namespace std;
  69 using namespace ARDOUR;
  70 using namespace PBD;
  71
  72 PBD::Signal1<void,RouteSortOrderKey> Route::SyncOrderKeys;
  73 PBD::Signal0<void> Route::RemoteControlIDChange;
  74
  75 Route::Route (Session& sess, string name, Flag flg, DataType default_type)
  76         : SessionObject (sess, name)
  77         , Automatable (sess)
  78         , GraphNode (sess._process_graph)
  79         , _active (true)
  80         , _signal_latency (0)
  81         , _initial_delay (0)
  82         , _roll_delay (0)
  83         , _flags (flg)
  84         , _pending_declick (true)
  85         , _meter_point (MeterPostFader)
  86         , _meter_type (MeterPeak)
  87         , _self_solo (false)
  88         , _soloed_by_others_upstream (0)
  89         , _soloed_by_others_downstream (0)
  90         , _solo_isolated (0)
  91         , _denormal_protection (false)
  92         , _recordable (true)
  93         , _silent (false)
  94         , _declickable (false)
  95         , _mute_master (new MuteMaster (sess, name))
  96         , _have_internal_generator (false)
  97         , _solo_safe (false)
  98         , _default_type (default_type)
  99         , _remote_control_id (0)
 100         , _in_configure_processors (false)
 101         , _custom_meter_position_noted (false)
 102         , _last_custom_meter_was_at_end (false)
 103 {
 104         processor_max_streams.reset();
 105 }
 106
 107 int
 108 Route::init ()
 109 {
 110         /* add standard controls */
 111
 112         _solo_control.reset (new SoloControllable (X_("solo"), shared_from_this ()));
 113         _mute_control.reset (new MuteControllable (X_("mute"), shared_from_this ()));
 114
 115         _solo_control->set_flags (Controllable::Flag (_solo_control->flags() | Controllable::Toggle));
 116         _mute_control->set_flags (Controllable::Flag (_mute_control->flags() | Controllable::Toggle));
 117
 118         add_control (_solo_control);
 119         add_control (_mute_control);
 120
 121         /* panning */
 122
 123         if (!(_flags & Route::MonitorOut)) {
 124                 _pannable.reset (new Pannable (_session));
 125         }
 126
 127         /* input and output objects */
 128
 129         _input.reset (new IO (_session, _name, IO::Input, _default_type));
 130         _output.reset (new IO (_session, _name, IO::Output, _default_type));
 131
 132         _input->changed.connect_same_thread (*this, boost::bind (&Route::input_change_handler, this, _1, _2));
 133         _input->PortCountChanging.connect_same_thread (*this, boost::bind (&Route::input_port_count_changing, this, _1));
 134
 135         _output->changed.connect_same_thread (*this, boost::bind (&Route::output_change_handler, this, _1, _2));
 136
 137         /* add amp processor  */
 138
 139         _amp.reset (new Amp (_session));
 140         add_processor (_amp, PostFader);
 141
 142         /* create standard processors: meter, main outs, monitor out;
 143            they will be added to _processors by setup_invisible_processors ()
 144         */
 145
 146         _meter.reset (new PeakMeter (_session, _name));
 147         _meter->set_display_to_user (false);
 148         _meter->activate ();
 149
 150         _main_outs.reset (new Delivery (_session, _output, _pannable, _mute_master, _name, Delivery::Main));
 151         _main_outs->activate ();
 152
 153         if (is_monitor()) {
 154                 /* where we listen to tracks */
 155                 _intreturn.reset (new InternalReturn (_session));
 156                 _intreturn->activate ();
 157
 158                 /* the thing that provides proper control over a control/monitor/listen bus
 159                    (such as per-channel cut, dim, solo, invert, etc).
 160                 */
 161                 _monitor_control.reset (new MonitorProcessor (_session));
 162                 _monitor_control->activate ();
 163         }
 164
 165         if (is_master() || is_monitor() || is_auditioner()) {
 166                 _mute_master->set_solo_ignore (true);
 167         }
 168
 169         /* now that we have _meter, its safe to connect to this */
 170
 171         Metering::Meter.connect_same_thread (*this, (boost::bind (&Route::meter, this)));
 172
 173         {
 174                 /* run a configure so that the invisible processors get set up */
 175                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 176                 configure_processors (0);
 177         }
 178
 179         return 0;
 180 }
 181
 182 Route::~Route ()
 183 {
 184         DEBUG_TRACE (DEBUG::Destruction, string_compose ("route %1 destructor\n", _name));
 185
 186         /* do this early so that we don't get incoming signals as we are going through destruction
 187          */
 188
 189         drop_connections ();
 190
 191         /* don't use clear_processors here, as it depends on the session which may
 192            be half-destroyed by now
 193         */
 194
 195         Glib::Threads::RWLock::WriterLock lm (_processor_lock);
 196         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 197                 (*i)->drop_references ();
 198         }
 199
 200         _processors.clear ();
 201 }
 202
 203 void
 204 Route::set_remote_control_id (uint32_t id, bool notify_class_listeners)
 205 {
 206         if (Config->get_remote_model() != UserOrdered) {
 207                 return;
 208         }
 209
 210         set_remote_control_id_internal (id, notify_class_listeners);
 211 }
 212
 213 void
 214 Route::set_remote_control_id_internal (uint32_t id, bool notify_class_listeners)
 215 {
 216         /* force IDs for master/monitor busses and prevent
 217            any other route from accidentally getting these IDs
 218            (i.e. legacy sessions)
 219         */
 220
 221         if (is_master() && id != MasterBusRemoteControlID) {
 222                 id = MasterBusRemoteControlID;
 223         }
 224
 225         if (is_monitor() && id != MonitorBusRemoteControlID) {
 226                 id = MonitorBusRemoteControlID;
 227         }
 228
 229         if (id < 1) {
 230                 return;
 231         }
 232
 233         /* don't allow it to collide */
 234
 235         if (!is_master () && !is_monitor() &&
 236             (id == MasterBusRemoteControlID || id == MonitorBusRemoteControlID)) {
 237                 id += MonitorBusRemoteControlID;
 238         }
 239
 240         if (id != remote_control_id()) {
 241                 _remote_control_id = id;
 242                 RemoteControlIDChanged ();
 243
 244                 if (notify_class_listeners) {
 245                         RemoteControlIDChange ();
 246                 }
 247         }
 248 }
 249
 250 uint32_t
 251 Route::remote_control_id() const
 252 {
 253         if (is_master()) {
 254                 return MasterBusRemoteControlID;
 255         }
 256
 257         if (is_monitor()) {
 258                 return MonitorBusRemoteControlID;
 259         }
 260
 261         return _remote_control_id;
 262 }
 263
 264 bool
 265 Route::has_order_key (RouteSortOrderKey key) const
 266 {
 267         return (order_keys.find (key) != order_keys.end());
 268 }
 269
 270 uint32_t
 271 Route::order_key (RouteSortOrderKey key) const
 272 {
 273         OrderKeys::const_iterator i = order_keys.find (key);
 274
 275         if (i == order_keys.end()) {
 276                 return 0;
 277         }
 278
 279         return i->second;
 280 }
 281
 282 void
 283 Route::sync_order_keys (RouteSortOrderKey base)
 284 {
 285         /* this is called after changes to 1 or more route order keys have been
 286          * made, and we want to sync up.
 287          */
 288
 289         OrderKeys::iterator i = order_keys.find (base);
 290
 291         if (i == order_keys.end()) {
 292                 return;
 293         }
 294
 295         for (OrderKeys::iterator k = order_keys.begin(); k != order_keys.end(); ++k) {
 296
 297                 if (k->first != base) {
 298                         DEBUG_TRACE (DEBUG::OrderKeys, string_compose ("%1 set key for %2 to %3 from %4\n",
 299                                                                        name(),
 300                                                                        enum_2_string (k->first),
 301                                                                        i->second,
 302                                                                        enum_2_string (base)));
 303
 304                         k->second = i->second;
 305                 }
 306         }
 307 }
 308
 309 void
 310 Route::set_remote_control_id_from_order_key (RouteSortOrderKey /*key*/, uint32_t rid)
 311 {
 312         if (is_master() || is_monitor() || is_auditioner()) {
 313                 /* hard-coded remote IDs, or no remote ID */
 314                 return;
 315         }
 316
 317         if (_remote_control_id != rid) {
 318                 DEBUG_TRACE (DEBUG::OrderKeys, string_compose ("%1: set edit-based RID to %2\n", name(), rid));
 319                 _remote_control_id = rid;
 320                 RemoteControlIDChanged (); /* EMIT SIGNAL (per-route) */
 321         }
 322
 323         /* don't emit the class-level RID signal RemoteControlIDChange here,
 324            leave that to the entity that changed the order key, so that we
 325            don't get lots of emissions for no good reasons (e.g. when changing
 326            all route order keys).
 327
 328            See Session::sync_remote_id_from_order_keys() for the (primary|only)
 329            spot where that is emitted.
 330         */
 331 }
 332
 333 void
 334 Route::set_order_key (RouteSortOrderKey key, uint32_t n)
 335 {
 336         OrderKeys::iterator i = order_keys.find (key);
 337
 338         if (i != order_keys.end() && i->second == n) {
 339                 return;
 340         }
 341
 342         order_keys[key] = n;
 343
 344         DEBUG_TRACE (DEBUG::OrderKeys, string_compose ("%1 order key %2 set to %3\n",
 345                                                        name(), enum_2_string (key), order_key (key)));
 346
 347         _session.set_dirty ();
 348 }
 349
 350 string
 351 Route::ensure_track_or_route_name(string name, Session &session)
 352 {
 353         string newname = name;
 354
 355         while (!session.io_name_is_legal (newname)) {
 356                 newname = bump_name_once (newname, '.');
 357         }
 358
 359         return newname;
 360 }
 361
 362
 363 void
 364 Route::inc_gain (gain_t fraction, void *src)
 365 {
 366         _amp->inc_gain (fraction, src);
 367 }
 368
 369 void
 370 Route::set_gain (gain_t val, void *src)
 371 {
 372         if (src != 0 && _route_group && src != _route_group && _route_group->is_active() && _route_group->is_gain()) {
 373
 374                 if (_route_group->is_relative()) {
 375
 376                         gain_t usable_gain = _amp->gain();
 377                         if (usable_gain < 0.000001f) {
 378                                 usable_gain = 0.000001f;
 379                         }
 380
 381                         gain_t delta = val;
 382                         if (delta < 0.000001f) {
 383                                 delta = 0.000001f;
 384                         }
 385
 386                         delta -= usable_gain;
 387
 388                         if (delta == 0.0f)
 389                                 return;
 390
 391                         gain_t factor = delta / usable_gain;
 392
 393                         if (factor > 0.0f) {
 394                                 factor = _route_group->get_max_factor(factor);
 395                                 if (factor == 0.0f) {
 396                                         _amp->gain_control()->Changed(); /* EMIT SIGNAL */
 397                                         return;
 398                                 }
 399                         } else {
 400                                 factor = _route_group->get_min_factor(factor);
 401                                 if (factor == 0.0f) {
 402                                         _amp->gain_control()->Changed(); /* EMIT SIGNAL */
 403                                         return;
 404                                 }
 405                         }
 406
 407                         _route_group->foreach_route (boost::bind (&Route::inc_gain, _1, factor, _route_group));
 408
 409                 } else {
 410
 411                         _route_group->foreach_route (boost::bind (&Route::set_gain, _1, val, _route_group));
 412                 }
 413
 414                 return;
 415         }
 416
 417         if (val == _amp->gain()) {
 418                 return;
 419         }
 420
 421         _amp->set_gain (val, src);
 422 }
 423
 424 void
 425 Route::maybe_declick (BufferSet&, framecnt_t, int)
 426 {
 427         /* this is the "bus" implementation and they never declick.
 428          */
 429         return;
 430 }
 431
 432 /** Process this route for one (sub) cycle (process thread)
 433  *
 434  * @param bufs Scratch buffers to use for the signal path
 435  * @param start_frame Initial transport frame
 436  * @param end_frame Final transport frame
 437  * @param nframes Number of frames to output (to ports)
 438  *
 439  * Note that (end_frame - start_frame) may not be equal to nframes when the
 440  * transport speed isn't 1.0 (eg varispeed).
 441  */
 442 void
 443 Route::process_output_buffers (BufferSet& bufs,
 444                                framepos_t start_frame, framepos_t end_frame, pframes_t nframes,
 445                                int declick, bool gain_automation_ok)
 446 {
 447         bufs.set_is_silent (false);
 448
 449         /* figure out if we're going to use gain automation */
 450         if (gain_automation_ok) {
 451                 _amp->set_gain_automation_buffer (_session.gain_automation_buffer ());
 452                 _amp->setup_gain_automation (start_frame, end_frame, nframes);
 453         } else {
 454                 _amp->apply_gain_automation (false);
 455         }
 456
 457         /* Tell main outs what to do about monitoring.  We do this so that
 458            on a transition between monitoring states we get a de-clicking gain
 459            change in the _main_outs delivery.
 460         */
 461
 462         _main_outs->no_outs_cuz_we_no_monitor (monitoring_state () == MonitoringSilence);
 463
 464         /* -------------------------------------------------------------------------------------------
 465            GLOBAL DECLICK (for transport changes etc.)
 466            ----------------------------------------------------------------------------------------- */
 467
 468         maybe_declick (bufs, nframes, declick);
 469         _pending_declick = 0;
 470
 471         /* -------------------------------------------------------------------------------------------
 472            DENORMAL CONTROL/PHASE INVERT
 473            ----------------------------------------------------------------------------------------- */
 474
 475         if (_phase_invert.any ()) {
 476
 477                 int chn = 0;
 478
 479                 if (_denormal_protection || Config->get_denormal_protection()) {
 480
 481                         for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i, ++chn) {
 482                                 Sample* const sp = i->data();
 483
 484                                 if (_phase_invert[chn]) {
 485                                         for (pframes_t nx = 0; nx < nframes; ++nx) {
 486                                                 sp[nx]  = -sp[nx];
 487                                                 sp[nx] += 1.0e-27f;
 488                                         }
 489                                 } else {
 490                                         for (pframes_t nx = 0; nx < nframes; ++nx) {
 491                                                 sp[nx] += 1.0e-27f;
 492                                         }
 493                                 }
 494                         }
 495
 496                 } else {
 497
 498                         for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i, ++chn) {
 499                                 Sample* const sp = i->data();
 500
 501                                 if (_phase_invert[chn]) {
 502                                         for (pframes_t nx = 0; nx < nframes; ++nx) {
 503                                                 sp[nx] = -sp[nx];
 504                                         }
 505                                 }
 506                         }
 507                 }
 508
 509         } else {
 510
 511                 if (_denormal_protection || Config->get_denormal_protection()) {
 512
 513                         for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) {
 514                                 Sample* const sp = i->data();
 515                                 for (pframes_t nx = 0; nx < nframes; ++nx) {
 516                                         sp[nx] += 1.0e-27f;
 517                                 }
 518                         }
 519
 520                 }
 521         }
 522
 523         /* -------------------------------------------------------------------------------------------
 524            and go ....
 525            ----------------------------------------------------------------------------------------- */
 526
 527         /* set this to be true if the meter will already have been ::run() earlier */
 528         bool const meter_already_run = metering_state() == MeteringInput;
 529
 530         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 531
 532                 if (meter_already_run && boost::dynamic_pointer_cast<PeakMeter> (*i)) {
 533                         /* don't ::run() the meter, otherwise it will have its previous peak corrupted */
 534                         continue;
 535                 }
 536
 537 #ifndef NDEBUG
 538                 /* if it has any inputs, make sure they match */
 539                 if (boost::dynamic_pointer_cast<UnknownProcessor> (*i) == 0 && (*i)->input_streams() != ChanCount::ZERO) {
 540                         if (bufs.count() != (*i)->input_streams()) {
 541                                 DEBUG_TRACE (
 542                                         DEBUG::Processors, string_compose (
 543                                                 "%1 bufs = %2 input for %3 = %4\n",
 544                                                 _name, bufs.count(), (*i)->name(), (*i)->input_streams()
 545                                                 )
 546                                         );
 547                                 continue;
 548                         }
 549                 }
 550 #endif
 551
 552                 /* should we NOT run plugins here if the route is inactive?
 553                    do we catch route != active somewhere higher?
 554                 */
 555
 556                 (*i)->run (bufs, start_frame, end_frame, nframes, *i != _processors.back());
 557                 bufs.set_count ((*i)->output_streams());
 558         }
 559 }
 560
 561 ChanCount
 562 Route::n_process_buffers ()
 563 {
 564         return max (_input->n_ports(), processor_max_streams);
 565 }
 566
 567 void
 568 Route::monitor_run (framepos_t start_frame, framepos_t end_frame, pframes_t nframes, int declick)
 569 {
 570         assert (is_monitor());
 571         BufferSet& bufs (_session.get_scratch_buffers (n_process_buffers()));
 572         passthru (bufs, start_frame, end_frame, nframes, declick);
 573 }
 574
 575 void
 576 Route::passthru (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame, pframes_t nframes, int declick)
 577 {
 578         _silent = false;
 579
 580         if (is_monitor() && _session.listening() && !_session.is_auditioning()) {
 581
 582                 /* control/monitor bus ignores input ports when something is
 583                    feeding the listen "stream". data will "arrive" into the
 584                    route from the intreturn processor element.
 585                 */
 586
 587                 bufs.silence (nframes, 0);
 588         }
 589
 590         write_out_of_band_data (bufs, start_frame, end_frame, nframes);
 591         process_output_buffers (bufs, start_frame, end_frame, nframes, declick, true);
 592 }
 593
 594 void
 595 Route::passthru_silence (framepos_t start_frame, framepos_t end_frame, pframes_t nframes, int declick)
 596 {
 597         BufferSet& bufs (_session.get_silent_buffers (n_process_buffers()));
 598
 599         bufs.set_count (_input->n_ports());
 600         write_out_of_band_data (bufs, start_frame, end_frame, nframes);
 601         process_output_buffers (bufs, start_frame, end_frame, nframes, declick, false);
 602 }
 603
 604 void
 605 Route::set_listen (bool yn, void* src)
 606 {
 607         if (_solo_safe) {
 608                 return;
 609         }
 610
 611         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_solo()) {
 612                 _route_group->foreach_route (boost::bind (&Route::set_listen, _1, yn, _route_group));
 613                 return;
 614         }
 615
 616         if (_monitor_send) {
 617                 if (yn != _monitor_send->active()) {
 618                         if (yn) {
 619                                 _monitor_send->activate ();
 620                                 _mute_master->set_soloed (true);
 621                         } else {
 622                                 _monitor_send->deactivate ();
 623                                 _mute_master->set_soloed (false);
 624                         }
 625
 626                         listen_changed (src); /* EMIT SIGNAL */
 627                 }
 628         }
 629 }
 630
 631 bool
 632 Route::listening_via_monitor () const
 633 {
 634         if (_monitor_send) {
 635                 return _monitor_send->active ();
 636         } else {
 637                 return false;
 638         }
 639 }
 640
 641 void
 642 Route::set_solo_safe (bool yn, void *src)
 643 {
 644         if (_solo_safe != yn) {
 645                 _solo_safe = yn;
 646                 solo_safe_changed (src);
 647         }
 648 }
 649
 650 bool
 651 Route::solo_safe() const
 652 {
 653         return _solo_safe;
 654 }
 655
 656 void
 657 Route::set_solo (bool yn, void *src)
 658 {
 659         if (_solo_safe) {
 660                 DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 ignore solo change due to solo-safe\n", name()));
 661                 return;
 662         }
 663
 664         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_solo()) {
 665                 _route_group->foreach_route (boost::bind (&Route::set_solo, _1, yn, _route_group));
 666                 return;
 667         }
 668
 669         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1: set solo => %2, src: %3 grp ? %4 currently self-soloed ? %5\n",
 670                                                   name(), yn, src, (src == _route_group), self_soloed()));
 671
 672         if (self_soloed() != yn) {
 673                 set_self_solo (yn);
 674                 set_mute_master_solo ();
 675                 solo_changed (true, src); /* EMIT SIGNAL */
 676                 _solo_control->Changed (); /* EMIT SIGNAL */
 677         }
 678 }
 679
 680 void
 681 Route::set_self_solo (bool yn)
 682 {
 683         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1: set SELF solo => %2\n", name(), yn));
 684         _self_solo = yn;
 685 }
 686
 687 void
 688 Route::mod_solo_by_others_upstream (int32_t delta)
 689 {
 690         if (_solo_safe) {
 691                 DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 ignore solo-by-upstream due to solo-safe\n", name()));
 692                 return;
 693         }
 694
 695         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 mod solo-by-upstream by %2, current up = %3 down = %4\n",
 696                                                   name(), delta, _soloed_by_others_upstream, _soloed_by_others_downstream));
 697
 698         uint32_t old_sbu = _soloed_by_others_upstream;
 699
 700         if (delta < 0) {
 701                 if (_soloed_by_others_upstream >= (uint32_t) abs (delta)) {
 702                         _soloed_by_others_upstream += delta;
 703                 } else {
 704                         _soloed_by_others_upstream = 0;
 705                 }
 706         } else {
 707                 _soloed_by_others_upstream += delta;
 708         }
 709
 710         DEBUG_TRACE (DEBUG::Solo, string_compose (
 711                              "%1 SbU delta %2 = %3 old = %4 sbd %5 ss %6 exclusive %7\n",
 712                              name(), delta, _soloed_by_others_upstream, old_sbu,
 713                              _soloed_by_others_downstream, _self_solo, Config->get_exclusive_solo()));
 714
 715         /* push the inverse solo change to everything that feeds us.
 716
 717            This is important for solo-within-group. When we solo 1 track out of N that
 718            feed a bus, that track will cause mod_solo_by_upstream (+1) to be called
 719            on the bus. The bus then needs to call mod_solo_by_downstream (-1) on all
 720            tracks that feed it. This will silence them if they were audible because
 721            of a bus solo, but the newly soloed track will still be audible (because
 722            it is self-soloed).
 723
 724            but .. do this only when we are being told to solo-by-upstream (i.e delta = +1),
 725            not in reverse.
 726         */
 727
 728         if ((_self_solo || _soloed_by_others_downstream) &&
 729             ((old_sbu == 0 && _soloed_by_others_upstream > 0) ||
 730              (old_sbu > 0 && _soloed_by_others_upstream == 0))) {
 731
 732                 if (delta > 0 || !Config->get_exclusive_solo()) {
 733                         DEBUG_TRACE (DEBUG::Solo, "\t ... INVERT push\n");
 734                         for (FedBy::iterator i = _fed_by.begin(); i != _fed_by.end(); ++i) {
 735                                 boost::shared_ptr<Route> sr = i->r.lock();
 736                                 if (sr) {
 737                                         sr->mod_solo_by_others_downstream (-delta);
 738                                 }
 739                         }
 740                 }
 741         }
 742
 743         set_mute_master_solo ();
 744         solo_changed (false, this);
 745 }
 746
 747 void
 748 Route::mod_solo_by_others_downstream (int32_t delta)
 749 {
 750         if (_solo_safe) {
 751                 DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 ignore solo-by-downstream due to solo safe\n", name()));
 752                 return;
 753         }
 754
 755         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 mod solo-by-downstream by %2, current up = %3 down = %4\n",
 756                                                   name(), delta, _soloed_by_others_upstream, _soloed_by_others_downstream));
 757
 758         if (delta < 0) {
 759                 if (_soloed_by_others_downstream >= (uint32_t) abs (delta)) {
 760                         _soloed_by_others_downstream += delta;
 761                 } else {
 762                         _soloed_by_others_downstream = 0;
 763                 }
 764         } else {
 765                 _soloed_by_others_downstream += delta;
 766         }
 767
 768         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 SbD delta %2 = %3\n", name(), delta, _soloed_by_others_downstream));
 769
 770         set_mute_master_solo ();
 771         solo_changed (false, this);
 772 }
 773
 774 void
 775 Route::set_mute_master_solo ()
 776 {
 777         _mute_master->set_soloed (self_soloed() || soloed_by_others_downstream() || soloed_by_others_upstream());
 778 }
 779
 780 void
 781 Route::set_solo_isolated (bool yn, void *src)
 782 {
 783         if (is_master() || is_monitor() || is_auditioner()) {
 784                 return;
 785         }
 786
 787         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_solo()) {
 788                 _route_group->foreach_route (boost::bind (&Route::set_solo_isolated, _1, yn, _route_group));
 789                 return;
 790         }
 791
 792         /* forward propagate solo-isolate status to everything fed by this route, but not those via sends only */
 793
 794         boost::shared_ptr<RouteList> routes = _session.get_routes ();
 795         for (RouteList::iterator i = routes->begin(); i != routes->end(); ++i) {
 796
 797                 if ((*i).get() == this || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_auditioner()) {
 798                         continue;
 799                 }
 800
 801                 bool sends_only;
 802                 bool does_feed = direct_feeds_according_to_graph (*i, &sends_only); // we will recurse anyway, so don't use ::feeds()
 803
 804                 if (does_feed && !sends_only) {
 805                         (*i)->set_solo_isolated (yn, (*i)->route_group());
 806                 }
 807         }
 808
 809         /* XXX should we back-propagate as well? (April 2010: myself and chris goddard think not) */
 810
 811         bool changed = false;
 812
 813         if (yn) {
 814                 if (_solo_isolated == 0) {
 815                         _mute_master->set_solo_ignore (true);
 816                         changed = true;
 817                 }
 818                 _solo_isolated++;
 819         } else {
 820                 if (_solo_isolated > 0) {
 821                         _solo_isolated--;
 822                         if (_solo_isolated == 0) {
 823                                 _mute_master->set_solo_ignore (false);
 824                                 changed = true;
 825                         }
 826                 }
 827         }
 828
 829         if (changed) {
 830                 solo_isolated_changed (src);
 831         }
 832 }
 833
 834 bool
 835 Route::solo_isolated () const
 836 {
 837         return _solo_isolated > 0;
 838 }
 839
 840 void
 841 Route::set_mute_points (MuteMaster::MutePoint mp)
 842 {
 843         _mute_master->set_mute_points (mp);
 844         mute_points_changed (); /* EMIT SIGNAL */
 845
 846         if (_mute_master->muted_by_self()) {
 847                 mute_changed (this); /* EMIT SIGNAL */
 848                 _mute_control->Changed (); /* EMIT SIGNAL */
 849         }
 850 }
 851
 852 void
 853 Route::set_mute (bool yn, void *src)
 854 {
 855         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_mute()) {
 856                 _route_group->foreach_route (boost::bind (&Route::set_mute, _1, yn, _route_group));
 857                 return;
 858         }
 859
 860         if (muted() != yn) {
 861                 _mute_master->set_muted_by_self (yn);
 862                 /* allow any derived classes to respond to the mute change
 863                    before anybody else knows about it.
 864                 */
 865                 act_on_mute ();
 866                 /* tell everyone else */
 867                 mute_changed (src); /* EMIT SIGNAL */
 868                 _mute_control->Changed (); /* EMIT SIGNAL */
 869         }
 870 }
 871
 872 bool
 873 Route::muted () const
 874 {
 875         return _mute_master->muted_by_self();
 876 }
 877
 878 #if 0
 879 static void
 880 dump_processors(const string& name, const list<boost::shared_ptr<Processor> >& procs)
 881 {
 882         cerr << name << " {" << endl;
 883         for (list<boost::shared_ptr<Processor> >::const_iterator p = procs.begin();
 884                         p != procs.end(); ++p) {
 885                 cerr << "\t" << (*p)->name() << " ID = " << (*p)->id() << " @ " << (*p) << endl;
 886         }
 887         cerr << "}" << endl;
 888 }
 889 #endif
 890
 891 /** Supposing that we want to insert a Processor at a given Placement, return
 892  *  the processor to add the new one before (or 0 to add at the end).
 893  */
 894 boost::shared_ptr<Processor>
 895 Route::before_processor_for_placement (Placement p)
 896 {
 897         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
 898
 899         ProcessorList::iterator loc;
 900
 901         if (p == PreFader) {
 902                 /* generic pre-fader: insert immediately before the amp */
 903                 loc = find (_processors.begin(), _processors.end(), _amp);
 904         } else {
 905                 /* generic post-fader: insert right before the main outs */
 906                 loc = find (_processors.begin(), _processors.end(), _main_outs);
 907         }
 908
 909         return loc != _processors.end() ? *loc : boost::shared_ptr<Processor> ();
 910 }
 911
 912 /** Supposing that we want to insert a Processor at a given index, return
 913  *  the processor to add the new one before (or 0 to add at the end).
 914  */
 915 boost::shared_ptr<Processor>
 916 Route::before_processor_for_index (int index)
 917 {
 918         if (index == -1) {
 919                 return boost::shared_ptr<Processor> ();
 920         }
 921
 922         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
 923
 924         ProcessorList::iterator i = _processors.begin ();
 925         int j = 0;
 926         while (i != _processors.end() && j < index) {
 927                 if ((*i)->display_to_user()) {
 928                         ++j;
 929                 }
 930
 931                 ++i;
 932         }
 933
 934         return (i != _processors.end() ? *i : boost::shared_ptr<Processor> ());
 935 }
 936
 937 /** Add a processor either pre- or post-fader
 938  *  @return 0 on success, non-0 on failure.
 939  */
 940 int
 941 Route::add_processor (boost::shared_ptr<Processor> processor, Placement placement, ProcessorStreams* err, bool activation_allowed)
 942 {
 943         return add_processor (processor, before_processor_for_placement (placement), err, activation_allowed);
 944 }
 945
 946
 947 /** Add a processor to a route such that it ends up with a given index into the visible processors.
 948  *  @param index Index to add the processor at, or -1 to add at the end of the list.
 949  *  @return 0 on success, non-0 on failure.
 950  */
 951 int
 952 Route::add_processor_by_index (boost::shared_ptr<Processor> processor, int index, ProcessorStreams* err, bool activation_allowed)
 953 {
 954         return add_processor (processor, before_processor_for_index (index), err, activation_allowed);
 955 }
 956
 957 /** Add a processor to the route.
 958  *  @param before An existing processor in the list, or 0; the new processor will be inserted immediately before it (or at the end).
 959  *  @return 0 on success, non-0 on failure.
 960  */
 961 int
 962 Route::add_processor (boost::shared_ptr<Processor> processor, boost::shared_ptr<Processor> before, ProcessorStreams* err, bool activation_allowed)
 963 {
 964         assert (processor != _meter);
 965         assert (processor != _main_outs);
 966
 967         DEBUG_TRACE (DEBUG::Processors, string_compose (
 968                              "%1 adding processor %2\n", name(), processor->name()));
 969
 970         if (!_session.engine().connected() || !processor) {
 971                 return 1;
 972         }
 973
 974         {
 975                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
 976                 ProcessorState pstate (this);
 977
 978                 boost::shared_ptr<PluginInsert> pi;
 979                 boost::shared_ptr<PortInsert> porti;
 980
 981                 if (processor == _amp) {
 982                         /* Ensure that only one amp is in the list at any time */
 983                         ProcessorList::iterator check = find (_processors.begin(), _processors.end(), processor);
 984                         if (check != _processors.end()) {
 985                                 if (before == _amp) {
 986                                         /* Already in position; all is well */
 987                                         return 0;
 988                                 } else {
 989                                         _processors.erase (check);
 990                                 }
 991                         }
 992                 }
 993
 994                 assert (find (_processors.begin(), _processors.end(), processor) == _processors.end ());
 995
 996                 ProcessorList::iterator loc;
 997                 if (before) {
 998                         /* inserting before a processor; find it */
 999                         loc = find (_processors.begin(), _processors.end(), before);
1000                         if (loc == _processors.end ()) {
1001                                 /* Not found */
1002                                 return 1;
1003                         }
1004                 } else {
1005                         /* inserting at end */
1006                         loc = _processors.end ();
1007                 }
1008
1009                 _processors.insert (loc, processor);
1010
1011                 // Set up processor list channels.  This will set processor->[input|output]_streams(),
1012                 // configure redirect ports properly, etc.
1013
1014                 {
1015                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
1016
1017                         if (configure_processors_unlocked (err)) {
1018                                 pstate.restore ();
1019                                 configure_processors_unlocked (0); // it worked before we tried to add it ...
1020                                 return -1;
1021                         }
1022                 }
1023
1024                 if ((pi = boost::dynamic_pointer_cast<PluginInsert>(processor)) != 0) {
1025
1026                         if (pi->has_no_inputs ()) {
1027                                 /* generator plugin */
1028                                 _have_internal_generator = true;
1029                         }
1030
1031                 }
1032
1033                 if (activation_allowed && !_session.get_disable_all_loaded_plugins()) {
1034                         processor->activate ();
1035                 }
1036
1037                 processor->ActiveChanged.connect_same_thread (*this, boost::bind (&Session::update_latency_compensation, &_session, false));
1038
1039                 _output->set_user_latency (0);
1040         }
1041
1042         reset_instrument_info ();
1043         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1044         set_processor_positions ();
1045
1046         return 0;
1047 }
1048
1049 bool
1050 Route::add_processor_from_xml_2X (const XMLNode& node, int version)
1051 {
1052         const XMLProperty *prop;
1053
1054         try {
1055                 boost::shared_ptr<Processor> processor;
1056
1057                 /* bit of a hack: get the `placement' property from the <Redirect> tag here
1058                    so that we can add the processor in the right place (pre/post-fader)
1059                 */
1060
1061                 XMLNodeList const & children = node.children ();
1062                 XMLNodeList::const_iterator i = children.begin ();
1063
1064                 while (i != children.end() && (*i)->name() != X_("Redirect")) {
1065                         ++i;
1066                 }
1067
1068                 Placement placement = PreFader;
1069
1070                 if (i != children.end()) {
1071                         if ((prop = (*i)->property (X_("placement"))) != 0) {
1072                                 placement = Placement (string_2_enum (prop->value(), placement));
1073                         }
1074                 }
1075
1076                 if (node.name() == "Insert") {
1077
1078                         if ((prop = node.property ("type")) != 0) {
1079
1080                                 if (prop->value() == "ladspa" || prop->value() == "Ladspa" ||
1081                                                 prop->value() == "lv2" ||
1082                                                 prop->value() == "windows-vst" ||
1083                                                 prop->value() == "lxvst" ||
1084                                                 prop->value() == "audiounit") {
1085
1086                                         processor.reset (new PluginInsert (_session));
1087
1088                                 } else {
1089
1090                                         processor.reset (new PortInsert (_session, _pannable, _mute_master));
1091                                 }
1092
1093                         }
1094
1095                 } else if (node.name() == "Send") {
1096
1097                         processor.reset (new Send (_session, _pannable, _mute_master));
1098
1099                 } else {
1100
1101                         error << string_compose(_("unknown Processor type \"%1\"; ignored"), node.name()) << endmsg;
1102                         return false;
1103                 }
1104
1105                 if (processor->set_state (node, version)) {
1106                         return false;
1107                 }
1108
1109                 return (add_processor (processor, placement) == 0);
1110         }
1111
1112         catch (failed_constructor &err) {
1113                 warning << _("processor could not be created. Ignored.") << endmsg;
1114                 return false;
1115         }
1116 }
1117
1118 int
1119 Route::add_processors (const ProcessorList& others, boost::shared_ptr<Processor> before, ProcessorStreams* err)
1120 {
1121         /* NOTE: this is intended to be used ONLY when copying
1122            processors from another Route. Hence the subtle
1123            differences between this and ::add_processor()
1124         */
1125
1126         ProcessorList::iterator loc;
1127
1128         if (before) {
1129                 loc = find(_processors.begin(), _processors.end(), before);
1130         } else {
1131                 /* nothing specified - at end */
1132                 loc = _processors.end ();
1133         }
1134
1135         if (!_session.engine().connected()) {
1136                 return 1;
1137         }
1138
1139         if (others.empty()) {
1140                 return 0;
1141         }
1142
1143         {
1144                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1145                 ProcessorState pstate (this);
1146
1147                 for (ProcessorList::const_iterator i = others.begin(); i != others.end(); ++i) {
1148
1149                         if (*i == _meter) {
1150                                 continue;
1151                         }
1152
1153                         boost::shared_ptr<PluginInsert> pi;
1154
1155                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1156                                 pi->set_count (1);
1157                         }
1158
1159                         _processors.insert (loc, *i);
1160
1161                         if ((*i)->active()) {
1162                                 (*i)->activate ();
1163                         }
1164
1165                         {
1166                                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
1167                                 if (configure_processors_unlocked (err)) {
1168                                         pstate.restore ();
1169                                         configure_processors_unlocked (0); // it worked before we tried to add it ...
1170                                         return -1;
1171                                 }
1172                         }
1173
1174                         (*i)->ActiveChanged.connect_same_thread (*this, boost::bind (&Session::update_latency_compensation, &_session, false));
1175                 }
1176
1177                 for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
1178                         boost::shared_ptr<PluginInsert> pi;
1179
1180                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1181                                 if (pi->has_no_inputs ()) {
1182                                         _have_internal_generator = true;
1183                                         break;
1184                                 }
1185                         }
1186                 }
1187
1188                 _output->set_user_latency (0);
1189         }
1190
1191         reset_instrument_info ();
1192         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1193         set_processor_positions ();
1194
1195         return 0;
1196 }
1197
1198 void
1199 Route::placement_range(Placement p, ProcessorList::iterator& start, ProcessorList::iterator& end)
1200 {
1201         if (p == PreFader) {
1202                 start = _processors.begin();
1203                 end = find(_processors.begin(), _processors.end(), _amp);
1204         } else {
1205                 start = find(_processors.begin(), _processors.end(), _amp);
1206                 ++start;
1207                 end = _processors.end();
1208         }
1209 }
1210
1211 /** Turn off all processors with a given placement
1212  * @param p Placement of processors to disable
1213  */
1214 void
1215 Route::disable_processors (Placement p)
1216 {
1217         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1218
1219         ProcessorList::iterator start, end;
1220         placement_range(p, start, end);
1221
1222         for (ProcessorList::iterator i = start; i != end; ++i) {
1223                 (*i)->deactivate ();
1224         }
1225
1226         _session.set_dirty ();
1227 }
1228
1229 /** Turn off all redirects
1230  */
1231 void
1232 Route::disable_processors ()
1233 {
1234         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1235
1236         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1237                 (*i)->deactivate ();
1238         }
1239
1240         _session.set_dirty ();
1241 }
1242
1243 /** Turn off all redirects with a given placement
1244  * @param p Placement of redirects to disable
1245  */
1246 void
1247 Route::disable_plugins (Placement p)
1248 {
1249         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1250
1251         ProcessorList::iterator start, end;
1252         placement_range(p, start, end);
1253
1254         for (ProcessorList::iterator i = start; i != end; ++i) {
1255                 if (boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1256                         (*i)->deactivate ();
1257                 }
1258         }
1259
1260         _session.set_dirty ();
1261 }
1262
1263 /** Turn off all plugins
1264  */
1265 void
1266 Route::disable_plugins ()
1267 {
1268         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1269
1270         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1271                 if (boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1272                         (*i)->deactivate ();
1273                 }
1274         }
1275
1276         _session.set_dirty ();
1277 }
1278
1279
1280 void
1281 Route::ab_plugins (bool forward)
1282 {
1283         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1284
1285         if (forward) {
1286
1287                 /* forward = turn off all active redirects, and mark them so that the next time
1288                    we go the other way, we will revert them
1289                 */
1290
1291                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1292                         if (!boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1293                                 continue;
1294                         }
1295
1296                         if ((*i)->active()) {
1297                                 (*i)->deactivate ();
1298                                 (*i)->set_next_ab_is_active (true);
1299                         } else {
1300                                 (*i)->set_next_ab_is_active (false);
1301                         }
1302                 }
1303
1304         } else {
1305
1306                 /* backward = if the redirect was marked to go active on the next ab, do so */
1307
1308                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1309
1310                         if (!boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1311                                 continue;
1312                         }
1313
1314                         if ((*i)->get_next_ab_is_active()) {
1315                                 (*i)->activate ();
1316                         } else {
1317                                 (*i)->deactivate ();
1318                         }
1319                 }
1320         }
1321
1322         _session.set_dirty ();
1323 }
1324
1325
1326 /** Remove processors with a given placement.
1327  * @param p Placement of processors to remove.
1328  */
1329 void
1330 Route::clear_processors (Placement p)
1331 {
1332         if (!_session.engine().connected()) {
1333                 return;
1334         }
1335
1336         bool already_deleting = _session.deletion_in_progress();
1337         if (!already_deleting) {
1338                 _session.set_deletion_in_progress();
1339         }
1340
1341         {
1342                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1343                 ProcessorList new_list;
1344                 ProcessorStreams err;
1345                 bool seen_amp = false;
1346
1347                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1348
1349                         if (*i == _amp) {
1350                                 seen_amp = true;
1351                         }
1352
1353                         if ((*i) == _amp || (*i) == _meter || (*i) == _main_outs) {
1354
1355                                 /* you can't remove these */
1356
1357                                 new_list.push_back (*i);
1358
1359                         } else {
1360                                 if (seen_amp) {
1361
1362                                         switch (p) {
1363                                         case PreFader:
1364                                                 new_list.push_back (*i);
1365                                                 break;
1366                                         case PostFader:
1367                                                 (*i)->drop_references ();
1368                                                 break;
1369                                         }
1370
1371                                 } else {
1372
1373                                         switch (p) {
1374                                         case PreFader:
1375                                                 (*i)->drop_references ();
1376                                                 break;
1377                                         case PostFader:
1378                                                 new_list.push_back (*i);
1379                                                 break;
1380                                         }
1381                                 }
1382                         }
1383                 }
1384
1385                 _processors = new_list;
1386
1387                 {
1388                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
1389                         configure_processors_unlocked (&err); // this can't fail
1390                 }
1391         }
1392
1393         processor_max_streams.reset();
1394         _have_internal_generator = false;
1395         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1396         set_processor_positions ();
1397
1398         reset_instrument_info ();
1399
1400         if (!already_deleting) {
1401                 _session.clear_deletion_in_progress();
1402         }
1403 }
1404
1405 int
1406 Route::remove_processor (boost::shared_ptr<Processor> processor, ProcessorStreams* err, bool need_process_lock)
1407 {
1408         // TODO once the export point can be configured properly, do something smarter here
1409         if (processor == _capturing_processor) {
1410                 _capturing_processor.reset();
1411         }
1412
1413         /* these can never be removed */
1414
1415         if (processor == _amp || processor == _meter || processor == _main_outs) {
1416                 return 0;
1417         }
1418
1419         if (!_session.engine().connected()) {
1420                 return 1;
1421         }
1422
1423         processor_max_streams.reset();
1424
1425         {
1426                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1427                 ProcessorState pstate (this);
1428
1429                 ProcessorList::iterator i;
1430                 bool removed = false;
1431
1432                 for (i = _processors.begin(); i != _processors.end(); ) {
1433                         if (*i == processor) {
1434
1435                                 /* move along, see failure case for configure_processors()
1436                                    where we may need to reconfigure the processor.
1437                                 */
1438
1439                                 /* stop redirects that send signals to JACK ports
1440                                    from causing noise as a result of no longer being
1441                                    run.
1442                                 */
1443
1444                                 boost::shared_ptr<IOProcessor> iop;
1445
1446                                 if ((iop = boost::dynamic_pointer_cast<IOProcessor> (*i)) != 0) {
1447                                         iop->disconnect ();
1448                                 }
1449
1450                                 i = _processors.erase (i);
1451                                 removed = true;
1452                                 break;
1453
1454                         } else {
1455                                 ++i;
1456                         }
1457
1458                         _output->set_user_latency (0);
1459                 }
1460
1461                 if (!removed) {
1462                         /* what? */
1463                         return 1;
1464                 }
1465
1466                 if (need_process_lock) {
1467                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
1468
1469                         if (configure_processors_unlocked (err)) {
1470                                 pstate.restore ();
1471                                 /* we know this will work, because it worked before :) */
1472                                 configure_processors_unlocked (0);
1473                                 return -1;
1474                         }
1475                 } else {
1476                         if (configure_processors_unlocked (err)) {
1477                                 pstate.restore ();
1478                                 /* we know this will work, because it worked before :) */
1479                                 configure_processors_unlocked (0);
1480                                 return -1;
1481                         }
1482                 }
1483
1484                 _have_internal_generator = false;
1485
1486                 for (i = _processors.begin(); i != _processors.end(); ++i) {
1487                         boost::shared_ptr<PluginInsert> pi;
1488
1489                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1490                                 if (pi->has_no_inputs ()) {
1491                                         _have_internal_generator = true;
1492                                         break;
1493                                 }
1494                         }
1495                 }
1496         }
1497
1498         reset_instrument_info ();
1499         processor->drop_references ();
1500         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1501         set_processor_positions ();
1502
1503         return 0;
1504 }
1505
1506 int
1507 Route::remove_processors (const ProcessorList& to_be_deleted, ProcessorStreams* err)
1508 {
1509         ProcessorList deleted;
1510
1511         if (!_session.engine().connected()) {
1512                 return 1;
1513         }
1514
1515         processor_max_streams.reset();
1516
1517         {
1518                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1519                 ProcessorState pstate (this);
1520
1521                 ProcessorList::iterator i;
1522                 boost::shared_ptr<Processor> processor;
1523
1524                 for (i = _processors.begin(); i != _processors.end(); ) {
1525
1526                         processor = *i;
1527
1528                         /* these can never be removed */
1529
1530                         if (processor == _amp || processor == _meter || processor == _main_outs) {
1531                                 ++i;
1532                                 continue;
1533                         }
1534
1535                         /* see if its in the list of processors to delete */
1536
1537                         if (find (to_be_deleted.begin(), to_be_deleted.end(), processor) == to_be_deleted.end()) {
1538                                 ++i;
1539                                 continue;
1540                         }
1541
1542                         /* stop IOProcessors that send to JACK ports
1543                            from causing noise as a result of no longer being
1544                            run.
1545                         */
1546
1547                         boost::shared_ptr<IOProcessor> iop;
1548
1549                         if ((iop = boost::dynamic_pointer_cast<IOProcessor> (processor)) != 0) {
1550                                 iop->disconnect ();
1551                         }
1552
1553                         deleted.push_back (processor);
1554                         i = _processors.erase (i);
1555                 }
1556
1557                 if (deleted.empty()) {
1558                         /* none of those in the requested list were found */
1559                         return 0;
1560                 }
1561
1562                 _output->set_user_latency (0);
1563
1564                 {
1565                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
1566
1567                         if (configure_processors_unlocked (err)) {
1568                                 pstate.restore ();
1569                                 /* we know this will work, because it worked before :) */
1570                                 configure_processors_unlocked (0);
1571                                 return -1;
1572                         }
1573                 }
1574
1575                 _have_internal_generator = false;
1576
1577                 for (i = _processors.begin(); i != _processors.end(); ++i) {
1578                         boost::shared_ptr<PluginInsert> pi;
1579
1580                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1581                                 if (pi->has_no_inputs ()) {
1582                                         _have_internal_generator = true;
1583                                         break;
1584                                 }
1585                         }
1586                 }
1587         }
1588
1589         /* now try to do what we need to so that those that were removed will be deleted */
1590
1591         for (ProcessorList::iterator i = deleted.begin(); i != deleted.end(); ++i) {
1592                 (*i)->drop_references ();
1593         }
1594
1595         reset_instrument_info ();
1596         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1597         set_processor_positions ();
1598
1599         return 0;
1600 }
1601
1602 void
1603 Route::reset_instrument_info ()
1604 {
1605         boost::shared_ptr<Processor> instr = the_instrument();
1606         if (instr) {
1607                 _instrument_info.set_internal_instrument (instr);
1608         }
1609 }
1610
1611 /** Caller must hold process lock */
1612 int
1613 Route::configure_processors (ProcessorStreams* err)
1614 {
1615         assert (!AudioEngine::instance()->process_lock().trylock());
1616
1617         if (!_in_configure_processors) {
1618                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1619                 return configure_processors_unlocked (err);
1620         }
1621
1622         return 0;
1623 }
1624
1625 ChanCount
1626 Route::input_streams () const
1627 {
1628         return _input->n_ports ();
1629 }
1630
1631 list<pair<ChanCount, ChanCount> >
1632 Route::try_configure_processors (ChanCount in, ProcessorStreams* err)
1633 {
1634         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1635
1636         return try_configure_processors_unlocked (in, err);
1637 }
1638
1639 list<pair<ChanCount, ChanCount> >
1640 Route::try_configure_processors_unlocked (ChanCount in, ProcessorStreams* err)
1641 {
1642         // Check each processor in order to see if we can configure as requested
1643         ChanCount out;
1644         list<pair<ChanCount, ChanCount> > configuration;
1645         uint32_t index = 0;
1646
1647         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: configure processors\n", _name));
1648         DEBUG_TRACE (DEBUG::Processors, "{\n");
1649
1650         for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p, ++index) {
1651
1652                 if (boost::dynamic_pointer_cast<UnknownProcessor> (*p)) {
1653                         DEBUG_TRACE (DEBUG::Processors, "--- CONFIGURE ABORTED due to unknown processor.\n");
1654                         break;
1655                 }
1656
1657                 if ((*p)->can_support_io_configuration(in, out)) {
1658                         DEBUG_TRACE (DEBUG::Processors, string_compose ("\t%1 ID=%2 in=%3 out=%4\n",(*p)->name(), (*p)->id(), in, out));
1659                         configuration.push_back(make_pair(in, out));
1660                         in = out;
1661                 } else {
1662                         if (err) {
1663                                 err->index = index;
1664                                 err->count = in;
1665                         }
1666                         DEBUG_TRACE (DEBUG::Processors, "---- CONFIGURATION FAILED.\n");
1667                         DEBUG_TRACE (DEBUG::Processors, string_compose ("---- %1 cannot support in=%2 out=%3\n", (*p)->name(), in, out));
1668                         DEBUG_TRACE (DEBUG::Processors, "}\n");
1669                         return list<pair<ChanCount, ChanCount> > ();
1670                 }
1671         }
1672
1673         DEBUG_TRACE (DEBUG::Processors, "}\n");
1674
1675         return configuration;
1676 }
1677
1678 /** Set the input/output configuration of each processor in the processors list.
1679  *  Caller must hold process lock.
1680  *  Return 0 on success, otherwise configuration is impossible.
1681  */
1682 int
1683 Route::configure_processors_unlocked (ProcessorStreams* err)
1684 {
1685         assert (!AudioEngine::instance()->process_lock().trylock());
1686
1687         if (_in_configure_processors) {
1688                 return 0;
1689         }
1690
1691         /* put invisible processors where they should be */
1692         setup_invisible_processors ();
1693
1694         _in_configure_processors = true;
1695
1696         list<pair<ChanCount, ChanCount> > configuration = try_configure_processors_unlocked (input_streams (), err);
1697
1698         if (configuration.empty ()) {
1699                 _in_configure_processors = false;
1700                 return -1;
1701         }
1702
1703         ChanCount out;
1704
1705         list< pair<ChanCount,ChanCount> >::iterator c = configuration.begin();
1706         for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p, ++c) {
1707
1708                 if (boost::dynamic_pointer_cast<UnknownProcessor> (*p)) {
1709                         break;
1710                 }
1711
1712                 (*p)->configure_io(c->first, c->second);
1713                 processor_max_streams = ChanCount::max(processor_max_streams, c->first);
1714                 processor_max_streams = ChanCount::max(processor_max_streams, c->second);
1715                 out = c->second;
1716         }
1717
1718         if (_meter) {
1719                 _meter->reset_max_channels (processor_max_streams);
1720         }
1721
1722         /* make sure we have sufficient scratch buffers to cope with the new processor
1723            configuration
1724         */
1725         _session.ensure_buffers (n_process_buffers ());
1726
1727         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: configuration complete\n", _name));
1728
1729         _in_configure_processors = false;
1730         return 0;
1731 }
1732
1733 /** Set all visible processors to a given active state (except Fader, whose state is not changed)
1734  *  @param state New active state for those processors.
1735  */
1736 void
1737 Route::all_visible_processors_active (bool state)
1738 {
1739         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1740
1741         if (_processors.empty()) {
1742                 return;
1743         }
1744
1745         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1746                 if (!(*i)->display_to_user() || boost::dynamic_pointer_cast<Amp> (*i)) {
1747                         continue;
1748                 }
1749
1750                 if (state) {
1751                         (*i)->activate ();
1752                 } else {
1753                         (*i)->deactivate ();
1754                 }
1755         }
1756
1757         _session.set_dirty ();
1758 }
1759
1760 int
1761 Route::reorder_processors (const ProcessorList& new_order, ProcessorStreams* err)
1762 {
1763         /* "new_order" is an ordered list of processors to be positioned according to "placement".
1764            NOTE: all processors in "new_order" MUST be marked as display_to_user(). There maybe additional
1765            processors in the current actual processor list that are hidden. Any visible processors
1766            in the current list but not in "new_order" will be assumed to be deleted.
1767         */
1768
1769         {
1770                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1771                 ProcessorState pstate (this);
1772
1773                 ProcessorList::iterator oiter;
1774                 ProcessorList::const_iterator niter;
1775                 ProcessorList as_it_will_be;
1776
1777                 oiter = _processors.begin();
1778                 niter = new_order.begin();
1779
1780                 while (niter !=  new_order.end()) {
1781
1782                         /* if the next processor in the old list is invisible (i.e. should not be in the new order)
1783                            then append it to the temp list.
1784
1785                            Otherwise, see if the next processor in the old list is in the new list. if not,
1786                            its been deleted. If its there, append it to the temp list.
1787                         */
1788
1789                         if (oiter == _processors.end()) {
1790
1791                                 /* no more elements in the old list, so just stick the rest of
1792                                    the new order onto the temp list.
1793                                 */
1794
1795                                 as_it_will_be.insert (as_it_will_be.end(), niter, new_order.end());
1796                                 while (niter != new_order.end()) {
1797                                         ++niter;
1798                                 }
1799                                 break;
1800
1801                         } else {
1802
1803                                 if (!(*oiter)->display_to_user()) {
1804
1805                                         as_it_will_be.push_back (*oiter);
1806
1807                                 } else {
1808
1809                                         /* visible processor: check that its in the new order */
1810
1811                                         if (find (new_order.begin(), new_order.end(), (*oiter)) == new_order.end()) {
1812                                                 /* deleted: do nothing, shared_ptr<> will clean up */
1813                                         } else {
1814                                                 /* ignore this one, and add the next item from the new order instead */
1815                                                 as_it_will_be.push_back (*niter);
1816                                                 ++niter;
1817                                         }
1818                                 }
1819
1820                                 /* now remove from old order - its taken care of no matter what */
1821                                 oiter = _processors.erase (oiter);
1822                         }
1823
1824                 }
1825
1826                 _processors.insert (oiter, as_it_will_be.begin(), as_it_will_be.end());
1827
1828                 /* If the meter is in a custom position, find it and make a rough note of its position */
1829                 maybe_note_meter_position ();
1830
1831                 {
1832                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
1833
1834                         if (configure_processors_unlocked (err)) {
1835                                 pstate.restore ();
1836                                 return -1;
1837                         }
1838                 }
1839         }
1840
1841         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1842         set_processor_positions ();
1843
1844         return 0;
1845 }
1846
1847 XMLNode&
1848 Route::get_state()
1849 {
1850         return state(true);
1851 }
1852
1853 XMLNode&
1854 Route::get_template()
1855 {
1856         return state(false);
1857 }
1858
1859 XMLNode&
1860 Route::state(bool full_state)
1861 {
1862         XMLNode *node = new XMLNode("Route");
1863         ProcessorList::iterator i;
1864         char buf[32];
1865
1866         id().print (buf, sizeof (buf));
1867         node->add_property("id", buf);
1868         node->add_property ("name", _name);
1869         node->add_property("default-type", _default_type.to_string());
1870
1871         if (_flags) {
1872                 node->add_property("flags", enum_2_string (_flags));
1873         }
1874
1875         node->add_property("active", _active?"yes":"no");
1876         string p;
1877         boost::to_string (_phase_invert, p);
1878         node->add_property("phase-invert", p);
1879         node->add_property("denormal-protection", _denormal_protection?"yes":"no");
1880         node->add_property("meter-point", enum_2_string (_meter_point));
1881
1882         node->add_property("meter-type", enum_2_string (_meter_type));
1883
1884         if (_route_group) {
1885                 node->add_property("route-group", _route_group->name());
1886         }
1887
1888         string order_string;
1889         OrderKeys::iterator x = order_keys.begin();
1890
1891         while (x != order_keys.end()) {
1892                 order_string += enum_2_string ((*x).first);
1893                 order_string += '=';
1894                 snprintf (buf, sizeof(buf), "%" PRId32, (*x).second);
1895                 order_string += buf;
1896
1897                 ++x;
1898
1899                 if (x == order_keys.end()) {
1900                         break;
1901                 }
1902
1903                 order_string += ':';
1904         }
1905         node->add_property ("order-keys", order_string);
1906         node->add_property ("self-solo", (_self_solo ? "yes" : "no"));
1907         snprintf (buf, sizeof (buf), "%d", _soloed_by_others_upstream);
1908         node->add_property ("soloed-by-upstream", buf);
1909         snprintf (buf, sizeof (buf), "%d", _soloed_by_others_downstream);
1910         node->add_property ("soloed-by-downstream", buf);
1911         node->add_property ("solo-isolated", solo_isolated() ? "yes" : "no");
1912         node->add_property ("solo-safe", _solo_safe ? "yes" : "no");
1913
1914         node->add_child_nocopy (_input->state (full_state));
1915         node->add_child_nocopy (_output->state (full_state));
1916         node->add_child_nocopy (_solo_control->get_state ());
1917         node->add_child_nocopy (_mute_control->get_state ());
1918         node->add_child_nocopy (_mute_master->get_state ());
1919
1920         XMLNode* remote_control_node = new XMLNode (X_("RemoteControl"));
1921         snprintf (buf, sizeof (buf), "%d", _remote_control_id);
1922         remote_control_node->add_property (X_("id"), buf);
1923         node->add_child_nocopy (*remote_control_node);
1924
1925         if (_comment.length()) {
1926                 XMLNode *cmt = node->add_child ("Comment");
1927                 cmt->add_content (_comment);
1928         }
1929
1930         if (_pannable) {
1931                 node->add_child_nocopy (_pannable->state (full_state));
1932         }
1933
1934         for (i = _processors.begin(); i != _processors.end(); ++i) {
1935                 if (!full_state) {
1936                         /* template save: do not include internal sends functioning as
1937                            aux sends because the chance of the target ID
1938                            in the session where this template is used
1939                            is not very likely.
1940
1941                            similarly, do not save listen sends which connect to
1942                            the monitor section, because these will always be
1943                            added if necessary.
1944                         */
1945                         boost::shared_ptr<InternalSend> is;
1946
1947                         if ((is = boost::dynamic_pointer_cast<InternalSend> (*i)) != 0) {
1948                                 if (is->role() == Delivery::Listen) {
1949                                         continue;
1950                                 }
1951                         }
1952                 }
1953                 node->add_child_nocopy((*i)->state (full_state));
1954         }
1955
1956         if (_extra_xml) {
1957                 node->add_child_copy (*_extra_xml);
1958         }
1959
1960         if (_custom_meter_position_noted) {
1961                 boost::shared_ptr<Processor> after = _processor_after_last_custom_meter.lock ();
1962                 if (after) {
1963                         after->id().print (buf, sizeof (buf));
1964                         node->add_property (X_("processor-after-last-custom-meter"), buf);
1965                 }
1966
1967                 node->add_property (X_("last-custom-meter-was-at-end"), _last_custom_meter_was_at_end ? "yes" : "no");
1968         }
1969
1970         return *node;
1971 }
1972
1973 int
1974 Route::set_state (const XMLNode& node, int version)
1975 {
1976         if (version < 3000) {
1977                 return set_state_2X (node, version);
1978         }
1979
1980         XMLNodeList nlist;
1981         XMLNodeConstIterator niter;
1982         XMLNode *child;
1983         const XMLProperty *prop;
1984
1985         if (node.name() != "Route"){
1986                 error << string_compose(_("Bad node sent to Route::set_state() [%1]"), node.name()) << endmsg;
1987                 return -1;
1988         }
1989
1990         if ((prop = node.property (X_("name"))) != 0) {
1991                 Route::set_name (prop->value());
1992         }
1993
1994         set_id (node);
1995
1996         if ((prop = node.property (X_("flags"))) != 0) {
1997                 _flags = Flag (string_2_enum (prop->value(), _flags));
1998         } else {
1999                 _flags = Flag (0);
2000         }
2001
2002         if (is_master() || is_monitor() || is_auditioner()) {
2003                 _mute_master->set_solo_ignore (true);
2004         }
2005
2006         if (is_monitor()) {
2007                 /* monitor bus does not get a panner, but if (re)created
2008                    via XML, it will already have one by the time we
2009                    call ::set_state(). so ... remove it.
2010                 */
2011                 unpan ();
2012         }
2013
2014         /* add all processors (except amp, which is always present) */
2015
2016         nlist = node.children();
2017         XMLNode processor_state (X_("processor_state"));
2018
2019         Stateful::save_extra_xml (node);
2020
2021         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2022
2023                 child = *niter;
2024
2025                 if (child->name() == IO::state_node_name) {
2026                         if ((prop = child->property (X_("direction"))) == 0) {
2027                                 continue;
2028                         }
2029
2030                         if (prop->value() == "Input") {
2031                                 _input->set_state (*child, version);
2032                         } else if (prop->value() == "Output") {
2033                                 _output->set_state (*child, version);
2034                         }
2035                 }
2036
2037                 if (child->name() == X_("Processor")) {
2038                         processor_state.add_child_copy (*child);
2039                 }
2040
2041                 if (child->name() == X_("Pannable")) {
2042                         if (_pannable) {
2043                                 _pannable->set_state (*child, version);
2044                         } else {
2045                                 warning << string_compose (_("Pannable state found for route (%1) without a panner!"), name()) << endmsg;
2046                         }
2047                 }
2048         }
2049
2050         if ((prop = node.property (X_("meter-point"))) != 0) {
2051                 MeterPoint mp = MeterPoint (string_2_enum (prop->value (), _meter_point));
2052                 set_meter_point (mp, true);
2053                 if (_meter) {
2054                         _meter->set_display_to_user (_meter_point == MeterCustom);
2055                 }
2056         }
2057
2058         if ((prop = node.property (X_("meter-type"))) != 0) {
2059                 _meter_type = MeterType (string_2_enum (prop->value (), _meter_type));
2060         }
2061
2062         set_processor_state (processor_state);
2063
2064         // this looks up the internal instrument in processors
2065         reset_instrument_info();
2066
2067         if ((prop = node.property ("self-solo")) != 0) {
2068                 set_self_solo (string_is_affirmative (prop->value()));
2069         }
2070
2071         if ((prop = node.property ("soloed-by-upstream")) != 0) {
2072                 _soloed_by_others_upstream = 0; // needed for mod_.... () to work
2073                 mod_solo_by_others_upstream (atoi (prop->value()));
2074         }
2075
2076         if ((prop = node.property ("soloed-by-downstream")) != 0) {
2077                 _soloed_by_others_downstream = 0; // needed for mod_.... () to work
2078                 mod_solo_by_others_downstream (atoi (prop->value()));
2079         }
2080
2081         if ((prop = node.property ("solo-isolated")) != 0) {
2082                 set_solo_isolated (string_is_affirmative (prop->value()), this);
2083         }
2084
2085         if ((prop = node.property ("solo-safe")) != 0) {
2086                 set_solo_safe (string_is_affirmative (prop->value()), this);
2087         }
2088
2089         if ((prop = node.property (X_("phase-invert"))) != 0) {
2090                 set_phase_invert (boost::dynamic_bitset<> (prop->value ()));
2091         }
2092
2093         if ((prop = node.property (X_("denormal-protection"))) != 0) {
2094                 set_denormal_protection (string_is_affirmative (prop->value()));
2095         }
2096
2097         if ((prop = node.property (X_("active"))) != 0) {
2098                 bool yn = string_is_affirmative (prop->value());
2099                 _active = !yn; // force switch
2100                 set_active (yn, this);
2101         }
2102
2103         if ((prop = node.property (X_("order-keys"))) != 0) {
2104
2105                 int32_t n;
2106
2107                 string::size_type colon, equal;
2108                 string remaining = prop->value();
2109
2110                 while (remaining.length()) {
2111
2112                         if ((equal = remaining.find_first_of ('=')) == string::npos || equal == remaining.length()) {
2113                                 error << string_compose (_("badly formed order key string in state file! [%1] ... ignored."), remaining)
2114                                       << endmsg;
2115                         } else {
2116                                 if (sscanf (remaining.substr (equal+1).c_str(), "%d", &n) != 1) {
2117                                         error << string_compose (_("badly formed order key string in state file! [%1] ... ignored."), remaining)
2118                                               << endmsg;
2119                                 } else {
2120                                         string keyname = remaining.substr (0, equal);
2121                                         RouteSortOrderKey sk;
2122
2123                                         if (keyname == "signal") {
2124                                                 sk = MixerSort;
2125                                         } else if (keyname == "editor") {
2126                                                 sk = EditorSort;
2127                                         } else {
2128                                                 sk = (RouteSortOrderKey) string_2_enum (remaining.substr (0, equal), sk);
2129                                         }
2130
2131                                         set_order_key (sk, n);
2132                                 }
2133                         }
2134
2135                         colon = remaining.find_first_of (':');
2136
2137                         if (colon != string::npos) {
2138                                 remaining = remaining.substr (colon+1);
2139                         } else {
2140                                 break;
2141                         }
2142                 }
2143         }
2144
2145         if ((prop = node.property (X_("processor-after-last-custom-meter"))) != 0) {
2146                 PBD::ID id (prop->value ());
2147                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2148                 ProcessorList::const_iterator i = _processors.begin ();
2149                 while (i != _processors.end() && (*i)->id() != id) {
2150                         ++i;
2151                 }
2152
2153                 if (i != _processors.end ()) {
2154                         _processor_after_last_custom_meter = *i;
2155                         _custom_meter_position_noted = true;
2156                 }
2157         }
2158
2159         if ((prop = node.property (X_("last-custom-meter-was-at-end"))) != 0) {
2160                 _last_custom_meter_was_at_end = string_is_affirmative (prop->value ());
2161         }
2162
2163         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2164                 child = *niter;
2165
2166                 if (child->name() == X_("Comment")) {
2167
2168                         /* XXX this is a terrible API design in libxml++ */
2169
2170                         XMLNode *cmt = *(child->children().begin());
2171                         _comment = cmt->content();
2172
2173                 } else if (child->name() == Controllable::xml_node_name && (prop = child->property("name")) != 0) {
2174                         if (prop->value() == "solo") {
2175                                 _solo_control->set_state (*child, version);
2176                         } else if (prop->value() == "mute") {
2177                                 _mute_control->set_state (*child, version);
2178                         }
2179
2180                 } else if (child->name() == X_("RemoteControl")) {
2181                         if ((prop = child->property (X_("id"))) != 0) {
2182                                 int32_t x;
2183                                 sscanf (prop->value().c_str(), "%d", &x);
2184                                 set_remote_control_id_internal (x);
2185                         }
2186
2187                 } else if (child->name() == X_("MuteMaster")) {
2188                         _mute_master->set_state (*child, version);
2189                 }
2190         }
2191
2192         return 0;
2193 }
2194
2195 int
2196 Route::set_state_2X (const XMLNode& node, int version)
2197 {
2198         XMLNodeList nlist;
2199         XMLNodeConstIterator niter;
2200         XMLNode *child;
2201         const XMLProperty *prop;
2202
2203         /* 2X things which still remain to be handled:
2204          * default-type
2205          * automation
2206          * controlouts
2207          */
2208
2209         if (node.name() != "Route") {
2210                 error << string_compose(_("Bad node sent to Route::set_state() [%1]"), node.name()) << endmsg;
2211                 return -1;
2212         }
2213
2214         if ((prop = node.property (X_("flags"))) != 0) {
2215                 string f = prop->value ();
2216                 boost::replace_all (f, "ControlOut", "MonitorOut");
2217                 _flags = Flag (string_2_enum (f, _flags));
2218         } else {
2219                 _flags = Flag (0);
2220         }
2221
2222         if (is_master() || is_monitor() || is_auditioner()) {
2223                 _mute_master->set_solo_ignore (true);
2224         }
2225
2226         if ((prop = node.property (X_("phase-invert"))) != 0) {
2227                 boost::dynamic_bitset<> p (_input->n_ports().n_audio ());
2228                 if (string_is_affirmative (prop->value ())) {
2229                         p.set ();
2230                 }
2231                 set_phase_invert (p);
2232         }
2233
2234         if ((prop = node.property (X_("denormal-protection"))) != 0) {
2235                 set_denormal_protection (string_is_affirmative (prop->value()));
2236         }
2237
2238         if ((prop = node.property (X_("soloed"))) != 0) {
2239                 bool yn = string_is_affirmative (prop->value());
2240
2241                 /* XXX force reset of solo status */
2242
2243                 set_solo (yn, this);
2244         }
2245
2246         if ((prop = node.property (X_("muted"))) != 0) {
2247
2248                 bool first = true;
2249                 bool muted = string_is_affirmative (prop->value());
2250
2251                 if (muted) {
2252
2253                         string mute_point;
2254
2255                         if ((prop = node.property (X_("mute-affects-pre-fader"))) != 0) {
2256
2257                                 if (string_is_affirmative (prop->value())){
2258                                         mute_point = mute_point + "PreFader";
2259                                         first = false;
2260                                 }
2261                         }
2262
2263                         if ((prop = node.property (X_("mute-affects-post-fader"))) != 0) {
2264
2265                                 if (string_is_affirmative (prop->value())){
2266
2267                                         if (!first) {
2268                                                 mute_point = mute_point + ",";
2269                                         }
2270
2271                                         mute_point = mute_point + "PostFader";
2272                                         first = false;
2273                                 }
2274                         }
2275
2276                         if ((prop = node.property (X_("mute-affects-control-outs"))) != 0) {
2277
2278                                 if (string_is_affirmative (prop->value())){
2279
2280                                         if (!first) {
2281                                                 mute_point = mute_point + ",";
2282                                         }
2283
2284                                         mute_point = mute_point + "Listen";
2285                                         first = false;
2286                                 }
2287                         }
2288
2289                         if ((prop = node.property (X_("mute-affects-main-outs"))) != 0) {
2290
2291                                 if (string_is_affirmative (prop->value())){
2292
2293                                         if (!first) {
2294                                                 mute_point = mute_point + ",";
2295                                         }
2296
2297                                         mute_point = mute_point + "Main";
2298                                 }
2299                         }
2300
2301                         _mute_master->set_mute_points (mute_point);
2302                         _mute_master->set_muted_by_self (true);
2303                 }
2304         }
2305
2306         if ((prop = node.property (X_("meter-point"))) != 0) {
2307                 _meter_point = MeterPoint (string_2_enum (prop->value (), _meter_point));
2308         }
2309
2310         /* do not carry over edit/mix groups from 2.X because (a) its hard (b) they
2311            don't mean the same thing.
2312         */
2313
2314         if ((prop = node.property (X_("order-keys"))) != 0) {
2315
2316                 int32_t n;
2317
2318                 string::size_type colon, equal;
2319                 string remaining = prop->value();
2320
2321                 while (remaining.length()) {
2322
2323                         if ((equal = remaining.find_first_of ('=')) == string::npos || equal == remaining.length()) {
2324                                 error << string_compose (_("badly formed order key string in state file! [%1] ... ignored."), remaining)
2325                                         << endmsg;
2326                         } else {
2327                                 if (sscanf (remaining.substr (equal+1).c_str(), "%d", &n) != 1) {
2328                                         error << string_compose (_("badly formed order key string in state file! [%1] ... ignored."), remaining)
2329                                                 << endmsg;
2330                                 } else {
2331                                         string keyname = remaining.substr (0, equal);
2332                                         RouteSortOrderKey sk;
2333
2334                                         if (keyname == "signal") {
2335                                                 sk = MixerSort;
2336                                         } else if (keyname == "editor") {
2337                                                 sk = EditorSort;
2338                                         } else {
2339                                                 sk = (RouteSortOrderKey) string_2_enum (remaining.substr (0, equal), sk);
2340                                         }
2341
2342                                         set_order_key (sk, n);
2343                                 }
2344                         }
2345
2346                         colon = remaining.find_first_of (':');
2347
2348                         if (colon != string::npos) {
2349                                 remaining = remaining.substr (colon+1);
2350                         } else {
2351                                 break;
2352                         }
2353                 }
2354         }
2355
2356         /* IOs */
2357
2358         nlist = node.children ();
2359         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2360
2361                 child = *niter;
2362
2363                 if (child->name() == IO::state_node_name) {
2364
2365                         /* there is a note in IO::set_state_2X() about why we have to call
2366                            this directly.
2367                            */
2368
2369                         _input->set_state_2X (*child, version, true);
2370                         _output->set_state_2X (*child, version, false);
2371
2372                         if ((prop = child->property (X_("name"))) != 0) {
2373                                 Route::set_name (prop->value ());
2374                         }
2375
2376                         set_id (*child);
2377
2378                         if ((prop = child->property (X_("active"))) != 0) {
2379                                 bool yn = string_is_affirmative (prop->value());
2380                                 _active = !yn; // force switch
2381                                 set_active (yn, this);
2382                         }
2383
2384                         if ((prop = child->property (X_("gain"))) != 0) {
2385                                 gain_t val;
2386
2387                                 if (sscanf (prop->value().c_str(), "%f", &val) == 1) {
2388                                         _amp->gain_control()->set_value (val);
2389                                 }
2390                         }
2391
2392                         /* Set up Panners in the IO */
2393                         XMLNodeList io_nlist = child->children ();
2394
2395                         XMLNodeConstIterator io_niter;
2396                         XMLNode *io_child;
2397
2398                         for (io_niter = io_nlist.begin(); io_niter != io_nlist.end(); ++io_niter) {
2399
2400                                 io_child = *io_niter;
2401
2402                                 if (io_child->name() == X_("Panner")) {
2403                                         _main_outs->panner_shell()->set_state(*io_child, version);
2404                                 } else if (io_child->name() == X_("Automation")) {
2405                                         /* IO's automation is for the fader */
2406                                         _amp->set_automation_xml_state (*io_child, Evoral::Parameter (GainAutomation));
2407                                 }
2408                         }
2409                 }
2410         }
2411
2412         XMLNodeList redirect_nodes;
2413
2414         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2415
2416                 child = *niter;
2417
2418                 if (child->name() == X_("Send") || child->name() == X_("Insert")) {
2419                         redirect_nodes.push_back(child);
2420                 }
2421
2422         }
2423
2424         set_processor_state_2X (redirect_nodes, version);
2425
2426         Stateful::save_extra_xml (node);
2427
2428         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2429                 child = *niter;
2430
2431                 if (child->name() == X_("Comment")) {
2432
2433                         /* XXX this is a terrible API design in libxml++ */
2434
2435                         XMLNode *cmt = *(child->children().begin());
2436                         _comment = cmt->content();
2437
2438                 } else if (child->name() == Controllable::xml_node_name && (prop = child->property("name")) != 0) {
2439                         if (prop->value() == X_("solo")) {
2440                                 _solo_control->set_state (*child, version);
2441                         } else if (prop->value() == X_("mute")) {
2442                                 _mute_control->set_state (*child, version);
2443                         }
2444
2445                 } else if (child->name() == X_("RemoteControl")) {
2446                         if ((prop = child->property (X_("id"))) != 0) {
2447                                 int32_t x;
2448                                 sscanf (prop->value().c_str(), "%d", &x);
2449                                 set_remote_control_id_internal (x);
2450                         }
2451
2452                 }
2453         }
2454
2455         return 0;
2456 }
2457
2458 XMLNode&
2459 Route::get_processor_state ()
2460 {
2461         XMLNode* root = new XMLNode (X_("redirects"));
2462         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
2463                 root->add_child_nocopy ((*i)->state (true));
2464         }
2465
2466         return *root;
2467 }
2468
2469 void
2470 Route::set_processor_state_2X (XMLNodeList const & nList, int version)
2471 {
2472         /* We don't bother removing existing processors not in nList, as this
2473            method will only be called when creating a Route from scratch, not
2474            for undo purposes.  Just put processors in at the appropriate place
2475            in the list.
2476         */
2477
2478         for (XMLNodeConstIterator i = nList.begin(); i != nList.end(); ++i) {
2479                 add_processor_from_xml_2X (**i, version);
2480         }
2481 }
2482
2483 void
2484 Route::set_processor_state (const XMLNode& node)
2485 {
2486         const XMLNodeList &nlist = node.children();
2487         XMLNodeConstIterator niter;
2488         ProcessorList new_order;
2489         bool must_configure = false;
2490
2491         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2492
2493                 XMLProperty* prop = (*niter)->property ("type");
2494
2495                 if (prop->value() == "amp") {
2496                         _amp->set_state (**niter, Stateful::current_state_version);
2497                         new_order.push_back (_amp);
2498                 } else if (prop->value() == "meter") {
2499                         _meter->set_state (**niter, Stateful::current_state_version);
2500                         new_order.push_back (_meter);
2501                 } else if (prop->value() == "main-outs") {
2502                         _main_outs->set_state (**niter, Stateful::current_state_version);
2503                 } else if (prop->value() == "intreturn") {
2504                         if (!_intreturn) {
2505                                 _intreturn.reset (new InternalReturn (_session));
2506                                 must_configure = true;
2507                         }
2508                         _intreturn->set_state (**niter, Stateful::current_state_version);
2509                 } else if (is_monitor() && prop->value() == "monitor") {
2510                         if (!_monitor_control) {
2511                                 _monitor_control.reset (new MonitorProcessor (_session));
2512                                 must_configure = true;
2513                         }
2514                         _monitor_control->set_state (**niter, Stateful::current_state_version);
2515                 } else if (prop->value() == "capture") {
2516                         /* CapturingProcessor should never be restored, it's always
2517                            added explicitly when needed */
2518                 } else {
2519                         ProcessorList::iterator o;
2520
2521                         for (o = _processors.begin(); o != _processors.end(); ++o) {
2522                                 XMLProperty* id_prop = (*niter)->property(X_("id"));
2523                                 if (id_prop && (*o)->id() == id_prop->value()) {
2524                                         (*o)->set_state (**niter, Stateful::current_state_version);
2525                                         new_order.push_back (*o);
2526                                         break;
2527                                 }
2528                         }
2529
2530                         // If the processor (*niter) is not on the route then create it
2531
2532                         if (o == _processors.end()) {
2533
2534                                 boost::shared_ptr<Processor> processor;
2535
2536                                 if (prop->value() == "intsend") {
2537
2538                                         processor.reset (new InternalSend (_session, _pannable, _mute_master, boost::shared_ptr<Route>(), Delivery::Role (0)));
2539
2540                                 } else if (prop->value() == "ladspa" || prop->value() == "Ladspa" ||
2541                                            prop->value() == "lv2" ||
2542                                            prop->value() == "windows-vst" ||
2543                                            prop->value() == "lxvst" ||
2544                                            prop->value() == "audiounit") {
2545
2546                                         processor.reset (new PluginInsert(_session));
2547
2548                                 } else if (prop->value() == "port") {
2549
2550                                         processor.reset (new PortInsert (_session, _pannable, _mute_master));
2551
2552                                 } else if (prop->value() == "send") {
2553
2554                                         processor.reset (new Send (_session, _pannable, _mute_master));
2555
2556                                 } else {
2557                                         error << string_compose(_("unknown Processor type \"%1\"; ignored"), prop->value()) << endmsg;
2558                                         continue;
2559                                 }
2560
2561 #ifndef NO_PLUGIN_STATE
2562                                 if (processor->set_state (**niter, Stateful::current_state_version) != 0) {
2563                                         /* This processor could not be configured.  Turn it into a UnknownProcessor */
2564                                         processor.reset (new UnknownProcessor (_session, **niter));
2565                                 }
2566 #else
2567                                 if (boost::dynamic_pointer_cast<PluginInsert>(processor)) {
2568                                         if (processor->set_state (**niter, Stateful::current_state_version) != 0) {
2569                                                 /* This processor could not be configured.  Turn it into a UnknownProcessor */
2570                                                 processor.reset (new UnknownProcessor (_session, **niter));
2571                                         }
2572                                 } else {
2573                                         /* plugin, but ::set_state() not * allowed no message here - things will get too verbose */
2574                                 }
2575 #endif
2576
2577                                 /* we have to note the monitor send here, otherwise a new one will be created
2578                                    and the state of this one will be lost.
2579                                 */
2580                                 boost::shared_ptr<InternalSend> isend = boost::dynamic_pointer_cast<InternalSend> (processor);
2581                                 if (isend && isend->role() == Delivery::Listen) {
2582                                         _monitor_send = isend;
2583                                 }
2584
2585                                 /* it doesn't matter if invisible processors are added here, as they
2586                                    will be sorted out by setup_invisible_processors () shortly.
2587                                 */
2588
2589                                 new_order.push_back (processor);
2590                                 must_configure = true;
2591                         }
2592                 }
2593         }
2594
2595         {
2596                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
2597                 _processors = new_order;
2598
2599                 if (must_configure) {
2600                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
2601                         configure_processors_unlocked (0);
2602                 }
2603
2604                 for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
2605
2606                         (*i)->ActiveChanged.connect_same_thread (*this, boost::bind (&Session::update_latency_compensation, &_session, false));
2607
2608                         boost::shared_ptr<PluginInsert> pi;
2609
2610                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
2611                                 if (pi->has_no_inputs ()) {
2612                                         _have_internal_generator = true;
2613                                         break;
2614                                 }
2615                         }
2616                 }
2617         }
2618
2619         reset_instrument_info ();
2620         processors_changed (RouteProcessorChange ());
2621         set_processor_positions ();
2622 }
2623
2624 void
2625 Route::curve_reallocate ()
2626 {
2627 //      _gain_automation_curve.finish_resize ();
2628 //      _pan_automation_curve.finish_resize ();
2629 }
2630
2631 void
2632 Route::silence (framecnt_t nframes)
2633 {
2634         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
2635         if (!lm.locked()) {
2636                 return;
2637         }
2638
2639         silence_unlocked (nframes);
2640 }
2641
2642 void
2643 Route::silence_unlocked (framecnt_t nframes)
2644 {
2645         /* Must be called with the processor lock held */
2646
2647         if (!_silent) {
2648
2649                 _output->silence (nframes);
2650
2651                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
2652                         boost::shared_ptr<PluginInsert> pi;
2653
2654                         if (!_active && (pi = boost::dynamic_pointer_cast<PluginInsert> (*i)) != 0) {
2655                                 // skip plugins, they don't need anything when we're not active
2656                                 continue;
2657                         }
2658
2659                         (*i)->silence (nframes);
2660                 }
2661
2662                 if (nframes == _session.get_block_size()) {
2663                         // _silent = true;
2664                 }
2665         }
2666 }
2667
2668 void
2669 Route::add_internal_return ()
2670 {
2671         if (!_intreturn) {
2672                 _intreturn.reset (new InternalReturn (_session));
2673                 add_processor (_intreturn, PreFader);
2674         }
2675 }
2676
2677 void
2678 Route::add_send_to_internal_return (InternalSend* send)
2679 {
2680         Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
2681
2682         for (ProcessorList::const_iterator x = _processors.begin(); x != _processors.end(); ++x) {
2683                 boost::shared_ptr<InternalReturn> d = boost::dynamic_pointer_cast<InternalReturn>(*x);
2684
2685                 if (d) {
2686                         return d->add_send (send);
2687                 }
2688         }
2689 }
2690
2691 void
2692 Route::remove_send_from_internal_return (InternalSend* send)
2693 {
2694         Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
2695
2696         for (ProcessorList::const_iterator x = _processors.begin(); x != _processors.end(); ++x) {
2697                 boost::shared_ptr<InternalReturn> d = boost::dynamic_pointer_cast<InternalReturn>(*x);
2698
2699                 if (d) {
2700                         return d->remove_send (send);
2701                 }
2702         }
2703 }
2704
2705 void
2706 Route::enable_monitor_send ()
2707 {
2708         /* Caller must hold process lock */
2709         assert (!AudioEngine::instance()->process_lock().trylock());
2710
2711         /* master never sends to monitor section via the normal mechanism */
2712         assert (!is_master ());
2713
2714         /* make sure we have one */
2715         if (!_monitor_send) {
2716                 _monitor_send.reset (new InternalSend (_session, _pannable, _mute_master, _session.monitor_out(), Delivery::Listen));
2717                 _monitor_send->set_display_to_user (false);
2718         }
2719
2720         /* set it up */
2721         configure_processors (0);
2722 }
2723
2724 /** Add an aux send to a route.
2725  *  @param route route to send to.
2726  *  @param before Processor to insert before, or 0 to insert at the end.
2727  */
2728 int
2729 Route::add_aux_send (boost::shared_ptr<Route> route, boost::shared_ptr<Processor> before)
2730 {
2731         assert (route != _session.monitor_out ());
2732
2733         {
2734                 Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
2735
2736                 for (ProcessorList::iterator x = _processors.begin(); x != _processors.end(); ++x) {
2737
2738                         boost::shared_ptr<InternalSend> d = boost::dynamic_pointer_cast<InternalSend> (*x);
2739
2740                         if (d && d->target_route() == route) {
2741                                 /* already listening via the specified IO: do nothing */
2742                                 return 0;
2743                         }
2744                 }
2745         }
2746
2747         try {
2748
2749                 boost::shared_ptr<InternalSend> listener;
2750
2751                 {
2752                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
2753                         listener.reset (new InternalSend (_session, _pannable, _mute_master, route, Delivery::Aux));
2754                 }
2755
2756                 add_processor (listener, before);
2757
2758         } catch (failed_constructor& err) {
2759                 return -1;
2760         }
2761
2762         return 0;
2763 }
2764
2765 void
2766 Route::remove_aux_or_listen (boost::shared_ptr<Route> route)
2767 {
2768         ProcessorStreams err;
2769         ProcessorList::iterator tmp;
2770
2771         {
2772                 Glib::Threads::RWLock::ReaderLock rl(_processor_lock);
2773
2774                 /* have to do this early because otherwise processor reconfig
2775                  * will put _monitor_send back in the list
2776                  */
2777
2778                 if (route == _session.monitor_out()) {
2779                         _monitor_send.reset ();
2780                 }
2781
2782           again:
2783                 for (ProcessorList::iterator x = _processors.begin(); x != _processors.end(); ++x) {
2784
2785                         boost::shared_ptr<InternalSend> d = boost::dynamic_pointer_cast<InternalSend>(*x);
2786
2787                         if (d && d->target_route() == route) {
2788                                 rl.release ();
2789                                 remove_processor (*x, &err, false);
2790                                 rl.acquire ();
2791
2792                                 /* list could have been demolished while we dropped the lock
2793                                    so start over.
2794                                 */
2795
2796                                 goto again;
2797                         }
2798                 }
2799         }
2800 }
2801
2802 void
2803 Route::set_comment (string cmt, void *src)
2804 {
2805         _comment = cmt;
2806         comment_changed (src);
2807         _session.set_dirty ();
2808 }
2809
2810 bool
2811 Route::add_fed_by (boost::shared_ptr<Route> other, bool via_sends_only)
2812 {
2813         FeedRecord fr (other, via_sends_only);
2814
2815         pair<FedBy::iterator,bool> result =  _fed_by.insert (fr);
2816
2817         if (!result.second) {
2818
2819                 /* already a record for "other" - make sure sends-only information is correct */
2820                 if (!via_sends_only && result.first->sends_only) {
2821                         FeedRecord* frp = const_cast<FeedRecord*>(&(*result.first));
2822                         frp->sends_only = false;
2823                 }
2824         }
2825
2826         return result.second;
2827 }
2828
2829 void
2830 Route::clear_fed_by ()
2831 {
2832         _fed_by.clear ();
2833 }
2834
2835 bool
2836 Route::feeds (boost::shared_ptr<Route> other, bool* via_sends_only)
2837 {
2838         const FedBy& fed_by (other->fed_by());
2839
2840         for (FedBy::iterator f = fed_by.begin(); f != fed_by.end(); ++f) {
2841                 boost::shared_ptr<Route> sr = f->r.lock();
2842
2843                 if (sr && (sr.get() == this)) {
2844
2845                         if (via_sends_only) {
2846                                 *via_sends_only = f->sends_only;
2847                         }
2848
2849                         return true;
2850                 }
2851         }
2852
2853         return false;
2854 }
2855
2856 bool
2857 Route::direct_feeds_according_to_reality (boost::shared_ptr<Route> other, bool* via_send_only)
2858 {
2859         DEBUG_TRACE (DEBUG::Graph, string_compose ("Feeds? %1\n", _name));
2860
2861         if (_output->connected_to (other->input())) {
2862                 DEBUG_TRACE (DEBUG::Graph, string_compose ("\tdirect FEEDS %2\n", other->name()));
2863                 if (via_send_only) {
2864                         *via_send_only = false;
2865                 }
2866
2867                 return true;
2868         }
2869
2870
2871         for (ProcessorList::iterator r = _processors.begin(); r != _processors.end(); ++r) {
2872
2873                 boost::shared_ptr<IOProcessor> iop;
2874
2875                 if ((iop = boost::dynamic_pointer_cast<IOProcessor>(*r)) != 0) {
2876                         if (iop->feeds (other)) {
2877                                 DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tIOP %1 does feed %2\n", iop->name(), other->name()));
2878                                 if (via_send_only) {
2879                                         *via_send_only = true;
2880                                 }
2881                                 return true;
2882                         } else {
2883                                 DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tIOP %1 does NOT feed %2\n", iop->name(), other->name()));
2884                         }
2885                 } else {
2886                         DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tPROC %1 is not an IOP\n", (*r)->name()));
2887                 }
2888
2889         }
2890
2891         DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tdoes NOT feed %1\n", other->name()));
2892         return false;
2893 }
2894
2895 bool
2896 Route::direct_feeds_according_to_graph (boost::shared_ptr<Route> other, bool* via_send_only)
2897 {
2898         return _session._current_route_graph.has (shared_from_this (), other, via_send_only);
2899 }
2900
2901 /** Called from the (non-realtime) butler thread when the transport is stopped */
2902 void
2903 Route::nonrealtime_handle_transport_stopped (bool /*abort_ignored*/, bool /*did_locate*/, bool can_flush_processors)
2904 {
2905         framepos_t now = _session.transport_frame();
2906
2907         {
2908                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2909
2910                 Automatable::transport_stopped (now);
2911
2912                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
2913
2914                         if (!_have_internal_generator && (Config->get_plugins_stop_with_transport() && can_flush_processors)) {
2915                                 (*i)->flush ();
2916                         }
2917
2918                         (*i)->transport_stopped (now);
2919                 }
2920         }
2921
2922         _roll_delay = _initial_delay;
2923 }
2924
2925 void
2926 Route::input_change_handler (IOChange change, void * /*src*/)
2927 {
2928         bool need_to_queue_solo_change = true;
2929
2930         if ((change.type & IOChange::ConfigurationChanged)) {
2931                 /* This is called with the process lock held if change
2932                    contains ConfigurationChanged
2933                 */
2934                 need_to_queue_solo_change = false;
2935                 configure_processors (0);
2936                 _phase_invert.resize (_input->n_ports().n_audio ());
2937                 io_changed (); /* EMIT SIGNAL */
2938         }
2939
2940         if (!_input->connected() && _soloed_by_others_upstream) {
2941                 if (need_to_queue_solo_change) {
2942                         _session.cancel_solo_after_disconnect (shared_from_this(), true);
2943                 } else {
2944                         cancel_solo_after_disconnect (true);
2945                 }
2946         }
2947 }
2948
2949 void
2950 Route::output_change_handler (IOChange change, void * /*src*/)
2951 {
2952         bool need_to_queue_solo_change = true;
2953
2954         if ((change.type & IOChange::ConfigurationChanged)) {
2955                 /* This is called with the process lock held if change
2956                    contains ConfigurationChanged
2957                 */
2958                 need_to_queue_solo_change = false;
2959                 configure_processors (0);
2960                 io_changed (); /* EMIT SIGNAL */
2961         }
2962
2963         if (!_output->connected() && _soloed_by_others_downstream) {
2964                 if (need_to_queue_solo_change) {
2965                         _session.cancel_solo_after_disconnect (shared_from_this(), false);
2966                 } else {
2967                         cancel_solo_after_disconnect (false);
2968                 }
2969         }
2970 }
2971
2972 void
2973 Route::cancel_solo_after_disconnect (bool upstream)
2974 {
2975         if (upstream) {
2976                 _soloed_by_others_upstream = 0;
2977         } else {
2978                 _soloed_by_others_downstream = 0;
2979         }
2980         set_mute_master_solo ();
2981         solo_changed (false, this);
2982 }
2983
2984 uint32_t
2985 Route::pans_required () const
2986 {
2987         if (n_outputs().n_audio() < 2) {
2988                 return 0;
2989         }
2990
2991         return max (n_inputs ().n_audio(), processor_max_streams.n_audio());
2992 }
2993
2994 int
2995 Route::no_roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, bool session_state_changing)
2996 {
2997         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
2998
2999         if (!lm.locked()) {
3000                 return 0;
3001         }
3002
3003         if (n_outputs().n_total() == 0) {
3004                 return 0;
3005         }
3006
3007         if (!_active || n_inputs() == ChanCount::ZERO)  {
3008                 silence_unlocked (nframes);
3009                 return 0;
3010         }
3011
3012         if (session_state_changing) {
3013                 if (_session.transport_speed() != 0.0f) {
3014                         /* we're rolling but some state is changing (e.g. our diskstream contents)
3015                            so we cannot use them. Be silent till this is over.
3016
3017                            XXX note the absurdity of ::no_roll() being called when we ARE rolling!
3018                         */
3019                         silence_unlocked (nframes);
3020                         return 0;
3021                 }
3022                 /* we're really not rolling, so we're either delivery silence or actually
3023                    monitoring, both of which are safe to do while session_state_changing is true.
3024                 */
3025         }
3026
3027         BufferSet& bufs = _session.get_scratch_buffers (n_process_buffers());
3028
3029         fill_buffers_with_input (bufs, _input, nframes);
3030
3031         if (_meter_point == MeterInput) {
3032                 _meter->run (bufs, start_frame, end_frame, nframes, true);
3033         }
3034
3035         _amp->apply_gain_automation (false);
3036         passthru (bufs, start_frame, end_frame, nframes, 0);
3037
3038         return 0;
3039 }
3040
3041 int
3042 Route::roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, int declick, bool& /* need_butler */)
3043 {
3044         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
3045         if (!lm.locked()) {
3046                 return 0;
3047         }
3048
3049         if (n_outputs().n_total() == 0) {
3050                 return 0;
3051         }
3052
3053         if (!_active || n_inputs().n_total() == 0) {
3054                 silence_unlocked (nframes);
3055                 return 0;
3056         }
3057
3058         framepos_t unused = 0;
3059
3060         if ((nframes = check_initial_delay (nframes, unused)) == 0) {
3061                 return 0;
3062         }
3063
3064         _silent = false;
3065
3066         BufferSet& bufs = _session.get_scratch_buffers (n_process_buffers());
3067
3068         fill_buffers_with_input (bufs, _input, nframes);
3069
3070         if (_meter_point == MeterInput) {
3071                 _meter->run (bufs, start_frame, end_frame, nframes, true);
3072         }
3073
3074         passthru (bufs, start_frame, end_frame, nframes, declick);
3075
3076         return 0;
3077 }
3078
3079 int
3080 Route::silent_roll (pframes_t nframes, framepos_t /*start_frame*/, framepos_t /*end_frame*/, bool& /* need_butler */)
3081 {
3082         silence (nframes);
3083         return 0;
3084 }
3085
3086 void
3087 Route::flush_processors ()
3088 {
3089         /* XXX shouldn't really try to take this lock, since
3090            this is called from the RT audio thread.
3091         */
3092
3093         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3094
3095         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3096                 (*i)->flush ();
3097         }
3098 }
3099
3100 void
3101 Route::set_meter_point (MeterPoint p, bool force)
3102 {
3103         if (_meter_point == p && !force) {
3104                 return;
3105         }
3106
3107         bool meter_was_visible_to_user = _meter->display_to_user ();
3108
3109         {
3110                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
3111
3112                 maybe_note_meter_position ();
3113
3114                 _meter_point = p;
3115
3116                 if (_meter_point != MeterCustom) {
3117
3118                         _meter->set_display_to_user (false);
3119
3120                         setup_invisible_processors ();
3121
3122                 } else {
3123
3124                         _meter->set_display_to_user (true);
3125
3126                         /* If we have a previous position for the custom meter, try to put it there */
3127                         if (_custom_meter_position_noted) {
3128                                 boost::shared_ptr<Processor> after = _processor_after_last_custom_meter.lock ();
3129
3130                                 if (after) {
3131                                         ProcessorList::iterator i = find (_processors.begin(), _processors.end(), after);
3132                                         if (i != _processors.end ()) {
3133                                                 _processors.remove (_meter);
3134                                                 _processors.insert (i, _meter);
3135                                         }
3136                                 } else if (_last_custom_meter_was_at_end) {
3137                                         _processors.remove (_meter);
3138                                         _processors.push_back (_meter);
3139                                 }
3140                         }
3141                 }
3142
3143                 /* Set up the meter for its new position */
3144
3145                 ProcessorList::iterator loc = find (_processors.begin(), _processors.end(), _meter);
3146
3147                 ChanCount m_in;
3148
3149                 if (loc == _processors.begin()) {
3150                         m_in = _input->n_ports();
3151                 } else {
3152                         ProcessorList::iterator before = loc;
3153                         --before;
3154                         m_in = (*before)->output_streams ();
3155                 }
3156
3157                 _meter->reflect_inputs (m_in);
3158
3159                 /* we do not need to reconfigure the processors, because the meter
3160                    (a) is always ready to handle processor_max_streams
3161                    (b) is always an N-in/N-out processor, and thus moving
3162                    it doesn't require any changes to the other processors.
3163                 */
3164         }
3165
3166         meter_change (); /* EMIT SIGNAL */
3167
3168         bool const meter_visibly_changed = (_meter->display_to_user() != meter_was_visible_to_user);
3169
3170         processors_changed (RouteProcessorChange (RouteProcessorChange::MeterPointChange, meter_visibly_changed)); /* EMIT SIGNAL */
3171 }
3172
3173 void
3174 Route::listen_position_changed ()
3175 {
3176         {
3177                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
3178                 ProcessorState pstate (this);
3179
3180                 {
3181                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
3182
3183                         if (configure_processors_unlocked (0)) {
3184                                 pstate.restore ();
3185                                 configure_processors_unlocked (0); // it worked before we tried to add it ...
3186                                 return;
3187                         }
3188                 }
3189         }
3190
3191         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
3192         _session.set_dirty ();
3193 }
3194
3195 boost::shared_ptr<CapturingProcessor>
3196 Route::add_export_point()
3197 {
3198         if (!_capturing_processor) {
3199
3200                 _capturing_processor.reset (new CapturingProcessor (_session));
3201                 _capturing_processor->activate ();
3202
3203                 {
3204                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
3205                         configure_processors (0);
3206                 }
3207
3208         }
3209
3210         return _capturing_processor;
3211 }
3212
3213 framecnt_t
3214 Route::update_signal_latency ()
3215 {
3216         framecnt_t l = _output->user_latency();
3217
3218         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3219                 if ((*i)->active ()) {
3220                         l += (*i)->signal_latency ();
3221                 }
3222         }
3223
3224         DEBUG_TRACE (DEBUG::Latency, string_compose ("%1: internal signal latency = %2\n", _name, l));
3225
3226         if (_signal_latency != l) {
3227                 _signal_latency = l;
3228                 signal_latency_changed (); /* EMIT SIGNAL */
3229         }
3230
3231         return _signal_latency;
3232 }
3233
3234 void
3235 Route::set_user_latency (framecnt_t nframes)
3236 {
3237         _output->set_user_latency (nframes);
3238         _session.update_latency_compensation ();
3239 }
3240
3241 void
3242 Route::set_latency_compensation (framecnt_t longest_session_latency)
3243 {
3244         framecnt_t old = _initial_delay;
3245
3246         if (_signal_latency < longest_session_latency) {
3247                 _initial_delay = longest_session_latency - _signal_latency;
3248         } else {
3249                 _initial_delay = 0;
3250         }
3251
3252         DEBUG_TRACE (DEBUG::Latency, string_compose (
3253                              "%1: compensate for maximum latency of %2,"
3254                              "given own latency of %3, using initial delay of %4\n",
3255                              name(), longest_session_latency, _signal_latency, _initial_delay));
3256
3257         if (_initial_delay != old) {
3258                 initial_delay_changed (); /* EMIT SIGNAL */
3259         }
3260
3261         if (_session.transport_stopped()) {
3262                 _roll_delay = _initial_delay;
3263         }
3264 }
3265
3266 Route::SoloControllable::SoloControllable (std::string name, boost::shared_ptr<Route> r)
3267         : AutomationControl (r->session(), Evoral::Parameter (SoloAutomation),
3268                              boost::shared_ptr<AutomationList>(), name)
3269         , _route (r)
3270 {
3271         boost::shared_ptr<AutomationList> gl(new AutomationList(Evoral::Parameter(SoloAutomation)));
3272         set_list (gl);
3273 }
3274
3275 void
3276 Route::SoloControllable::set_value (double val)
3277 {
3278         bool bval = ((val >= 0.5f) ? true: false);
3279
3280         boost::shared_ptr<RouteList> rl (new RouteList);
3281
3282         boost::shared_ptr<Route> r = _route.lock ();
3283         if (!r) {
3284                 return;
3285         }
3286
3287         rl->push_back (r);
3288
3289         if (Config->get_solo_control_is_listen_control()) {
3290                 _session.set_listen (rl, bval);
3291         } else {
3292                 _session.set_solo (rl, bval);
3293         }
3294 }
3295
3296 double
3297 Route::SoloControllable::get_value () const
3298 {
3299         boost::shared_ptr<Route> r = _route.lock ();
3300         if (!r) {
3301                 return 0;
3302         }
3303
3304         if (Config->get_solo_control_is_listen_control()) {
3305                 return r->listening_via_monitor() ? 1.0f : 0.0f;
3306         } else {
3307                 return r->self_soloed() ? 1.0f : 0.0f;
3308         }
3309 }
3310
3311 Route::MuteControllable::MuteControllable (std::string name, boost::shared_ptr<Route> r)
3312         : AutomationControl (r->session(), Evoral::Parameter (MuteAutomation),
3313                              boost::shared_ptr<AutomationList>(), name)
3314         , _route (r)
3315 {
3316         boost::shared_ptr<AutomationList> gl(new AutomationList(Evoral::Parameter(MuteAutomation)));
3317         set_list (gl);
3318 }
3319
3320 void
3321 Route::MuteControllable::set_value (double val)
3322 {
3323         bool bval = ((val >= 0.5f) ? true: false);
3324
3325         boost::shared_ptr<RouteList> rl (new RouteList);
3326
3327         boost::shared_ptr<Route> r = _route.lock ();
3328         if (!r) {
3329                 return;
3330         }
3331
3332         rl->push_back (r);
3333         _session.set_mute (rl, bval);
3334 }
3335
3336 double
3337 Route::MuteControllable::get_value () const
3338 {
3339         boost::shared_ptr<Route> r = _route.lock ();
3340         if (!r) {
3341                 return 0;
3342         }
3343
3344         return r->muted() ? 1.0f : 0.0f;
3345 }
3346
3347 void
3348 Route::set_block_size (pframes_t nframes)
3349 {
3350         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3351                 (*i)->set_block_size (nframes);
3352         }
3353
3354         _session.ensure_buffers (n_process_buffers ());
3355 }
3356
3357 void
3358 Route::protect_automation ()
3359 {
3360         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i)
3361                 (*i)->protect_automation();
3362 }
3363
3364 /** @param declick 1 to set a pending declick fade-in,
3365  *                -1 to set a pending declick fade-out
3366  */
3367 void
3368 Route::set_pending_declick (int declick)
3369 {
3370         if (_declickable) {
3371                 /* this call is not allowed to turn off a pending declick */
3372                 if (declick) {
3373                         _pending_declick = declick;
3374                 }
3375         } else {
3376                 _pending_declick = 0;
3377         }
3378 }
3379
3380 /** Shift automation forwards from a particular place, thereby inserting time.
3381  *  Adds undo commands for any shifts that are performed.
3382  *
3383  * @param pos Position to start shifting from.
3384  * @param frames Amount to shift forwards by.
3385  */
3386
3387 void
3388 Route::shift (framepos_t pos, framecnt_t frames)
3389 {
3390         /* gain automation */
3391         {
3392                 boost::shared_ptr<AutomationControl> gc = _amp->gain_control();
3393
3394                 XMLNode &before = gc->alist()->get_state ();
3395                 gc->alist()->shift (pos, frames);
3396                 XMLNode &after = gc->alist()->get_state ();
3397                 _session.add_command (new MementoCommand<AutomationList> (*gc->alist().get(), &before, &after));
3398         }
3399
3400         /* pan automation */
3401         if (_pannable) {
3402                 ControlSet::Controls& c (_pannable->controls());
3403
3404                 for (ControlSet::Controls::const_iterator ci = c.begin(); ci != c.end(); ++ci) {
3405                         boost::shared_ptr<AutomationControl> pc = boost::dynamic_pointer_cast<AutomationControl> (ci->second);
3406                         if (pc) {
3407                                 boost::shared_ptr<AutomationList> al = pc->alist();
3408                                 XMLNode& before = al->get_state ();
3409                                 al->shift (pos, frames);
3410                                 XMLNode& after = al->get_state ();
3411                                 _session.add_command (new MementoCommand<AutomationList> (*al.get(), &before, &after));
3412                         }
3413                 }
3414         }
3415
3416         /* redirect automation */
3417         {
3418                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3419                 for (ProcessorList::iterator i = _processors.begin (); i != _processors.end (); ++i) {
3420
3421                         set<Evoral::Parameter> parameters = (*i)->what_can_be_automated();
3422
3423                         for (set<Evoral::Parameter>::const_iterator p = parameters.begin (); p != parameters.end (); ++p) {
3424                                 boost::shared_ptr<AutomationControl> ac = (*i)->automation_control (*p);
3425                                 if (ac) {
3426                                         boost::shared_ptr<AutomationList> al = ac->alist();
3427                                         XMLNode &before = al->get_state ();
3428                                         al->shift (pos, frames);
3429                                         XMLNode &after = al->get_state ();
3430                                         _session.add_command (new MementoCommand<AutomationList> (*al.get(), &before, &after));
3431                                 }
3432                         }
3433                 }
3434         }
3435 }
3436
3437
3438 int
3439 Route::save_as_template (const string& path, const string& name)
3440 {
3441         XMLNode& node (state (false));
3442         XMLTree tree;
3443
3444         IO::set_name_in_state (*node.children().front(), name);
3445
3446         tree.set_root (&node);
3447         return tree.write (path.c_str());
3448 }
3449
3450
3451 bool
3452 Route::set_name (const string& str)
3453 {
3454         bool ret;
3455         string ioproc_name;
3456         string name;
3457
3458         name = Route::ensure_track_or_route_name (str, _session);
3459         SessionObject::set_name (name);
3460
3461         ret = (_input->set_name(name) && _output->set_name(name));
3462
3463         if (ret) {
3464                 /* rename the main outs. Leave other IO processors
3465                  * with whatever name they already have, because its
3466                  * just fine as it is (it will not contain the route
3467                  * name if its a port insert, port send or port return).
3468                  */
3469
3470                 if (_main_outs) {
3471                         if (_main_outs->set_name (name)) {
3472                                 /* XXX returning false here is stupid because
3473                                    we already changed the route name.
3474                                 */
3475                                 return false;
3476                         }
3477                 }
3478         }
3479
3480         return ret;
3481 }
3482
3483 /** Set the name of a route in an XML description.
3484  *  @param node XML <Route> node to set the name in.
3485  *  @param name New name.
3486  */
3487 void
3488 Route::set_name_in_state (XMLNode& node, string const & name)
3489 {
3490         node.add_property (X_("name"), name);
3491
3492         XMLNodeList children = node.children();
3493         for (XMLNodeIterator i = children.begin(); i != children.end(); ++i) {
3494
3495                 if ((*i)->name() == X_("IO")) {
3496
3497                         IO::set_name_in_state (**i, name);
3498
3499                 } else if ((*i)->name() == X_("Processor")) {
3500
3501                         XMLProperty* role = (*i)->property (X_("role"));
3502                         if (role && role->value() == X_("Main")) {
3503                                 (*i)->add_property (X_("name"), name);
3504                         }
3505
3506                 } else if ((*i)->name() == X_("Diskstream")) {
3507
3508                         (*i)->add_property (X_("playlist"), string_compose ("%1.1", name).c_str());
3509                         (*i)->add_property (X_("name"), name);
3510
3511                 }
3512         }
3513 }
3514
3515 boost::shared_ptr<Send>
3516 Route::internal_send_for (boost::shared_ptr<const Route> target) const
3517 {
3518         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3519
3520         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
3521                 boost::shared_ptr<InternalSend> send;
3522
3523                 if ((send = boost::dynamic_pointer_cast<InternalSend>(*i)) != 0) {
3524                         if (send->target_route() == target) {
3525                                 return send;
3526                         }
3527                 }
3528         }
3529
3530         return boost::shared_ptr<Send>();
3531 }
3532
3533 /** @param c Audio channel index.
3534  *  @param yn true to invert phase, otherwise false.
3535  */
3536 void
3537 Route::set_phase_invert (uint32_t c, bool yn)
3538 {
3539         if (_phase_invert[c] != yn) {
3540                 _phase_invert[c] = yn;
3541                 phase_invert_changed (); /* EMIT SIGNAL */
3542                 _session.set_dirty ();
3543         }
3544 }
3545
3546 void
3547 Route::set_phase_invert (boost::dynamic_bitset<> p)
3548 {
3549         if (_phase_invert != p) {
3550                 _phase_invert = p;
3551                 phase_invert_changed (); /* EMIT SIGNAL */
3552                 _session.set_dirty ();
3553         }
3554 }
3555
3556 bool
3557 Route::phase_invert (uint32_t c) const
3558 {
3559         return _phase_invert[c];
3560 }
3561
3562 boost::dynamic_bitset<>
3563 Route::phase_invert () const
3564 {
3565         return _phase_invert;
3566 }
3567
3568 void
3569 Route::set_denormal_protection (bool yn)
3570 {
3571         if (_denormal_protection != yn) {
3572                 _denormal_protection = yn;
3573                 denormal_protection_changed (); /* EMIT SIGNAL */
3574         }
3575 }
3576
3577 bool
3578 Route::denormal_protection () const
3579 {
3580         return _denormal_protection;
3581 }
3582
3583 void
3584 Route::set_active (bool yn, void* src)
3585 {
3586         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_route_active()) {
3587                 _route_group->foreach_route (boost::bind (&Route::set_active, _1, yn, _route_group));
3588                 return;
3589         }
3590
3591         if (_active != yn) {
3592                 _active = yn;
3593                 _input->set_active (yn);
3594                 _output->set_active (yn);
3595                 active_changed (); // EMIT SIGNAL
3596                 _session.set_dirty ();
3597         }
3598 }
3599
3600 void
3601 Route::meter ()
3602 {
3603         Glib::Threads::RWLock::ReaderLock rm (_processor_lock, Glib::Threads::TRY_LOCK);
3604
3605         assert (_meter);
3606
3607         _meter->meter ();
3608
3609         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3610
3611                 boost::shared_ptr<Send> s;
3612                 boost::shared_ptr<Return> r;
3613
3614                 if ((s = boost::dynamic_pointer_cast<Send> (*i)) != 0) {
3615                         s->meter()->meter();
3616                 } else if ((r = boost::dynamic_pointer_cast<Return> (*i)) != 0) {
3617                         r->meter()->meter ();
3618                 }
3619         }
3620 }
3621
3622 boost::shared_ptr<Pannable>
3623 Route::pannable() const
3624 {
3625         return _pannable;
3626 }
3627
3628 boost::shared_ptr<Panner>
3629 Route::panner() const
3630 {
3631         /* may be null ! */
3632         return _main_outs->panner_shell()->panner();
3633 }
3634
3635 boost::shared_ptr<PannerShell>
3636 Route::panner_shell() const
3637 {
3638         return _main_outs->panner_shell();
3639 }
3640
3641 boost::shared_ptr<AutomationControl>
3642 Route::gain_control() const
3643 {
3644         return _amp->gain_control();
3645 }
3646
3647 boost::shared_ptr<AutomationControl>
3648 Route::get_control (const Evoral::Parameter& param)
3649 {
3650         /* either we own the control or .... */
3651
3652         boost::shared_ptr<AutomationControl> c = boost::dynamic_pointer_cast<AutomationControl>(control (param));
3653
3654         if (!c) {
3655
3656                 /* maybe one of our processors does or ... */
3657
3658                 Glib::Threads::RWLock::ReaderLock rm (_processor_lock, Glib::Threads::TRY_LOCK);
3659                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3660                         if ((c = boost::dynamic_pointer_cast<AutomationControl>((*i)->control (param))) != 0) {
3661                                 break;
3662                         }
3663                 }
3664         }
3665
3666         if (!c) {
3667
3668                 /* nobody does so we'll make a new one */
3669
3670                 c = boost::dynamic_pointer_cast<AutomationControl>(control_factory(param));
3671                 add_control(c);
3672         }
3673
3674         return c;
3675 }
3676
3677 boost::shared_ptr<Processor>
3678 Route::nth_plugin (uint32_t n)
3679 {
3680         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3681         ProcessorList::iterator i;
3682
3683         for (i = _processors.begin(); i != _processors.end(); ++i) {
3684                 if (boost::dynamic_pointer_cast<PluginInsert> (*i)) {
3685                         if (n-- == 0) {
3686                                 return *i;
3687                         }
3688                 }
3689         }
3690
3691         return boost::shared_ptr<Processor> ();
3692 }
3693
3694 boost::shared_ptr<Processor>
3695 Route::nth_send (uint32_t n)
3696 {
3697         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3698         ProcessorList::iterator i;
3699
3700         for (i = _processors.begin(); i != _processors.end(); ++i) {
3701                 if (boost::dynamic_pointer_cast<Send> (*i)) {
3702                         if (n-- == 0) {
3703                                 return *i;
3704                         }
3705                 }
3706         }
3707
3708         return boost::shared_ptr<Processor> ();
3709 }
3710
3711 bool
3712 Route::has_io_processor_named (const string& name)
3713 {
3714         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3715         ProcessorList::iterator i;
3716
3717         for (i = _processors.begin(); i != _processors.end(); ++i) {
3718                 if (boost::dynamic_pointer_cast<Send> (*i) ||
3719                     boost::dynamic_pointer_cast<PortInsert> (*i)) {
3720                         if ((*i)->name() == name) {
3721                                 return true;
3722                         }
3723                 }
3724         }
3725
3726         return false;
3727 }
3728
3729 MuteMaster::MutePoint
3730 Route::mute_points () const
3731 {
3732         return _mute_master->mute_points ();
3733 }
3734
3735 void
3736 Route::set_processor_positions ()
3737 {
3738         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3739
3740         bool had_amp = false;
3741         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3742                 (*i)->set_pre_fader (!had_amp);
3743                 if (boost::dynamic_pointer_cast<Amp> (*i)) {
3744                         had_amp = true;
3745                 }
3746         }
3747 }
3748
3749 /** Called when there is a proposed change to the input port count */
3750 bool
3751 Route::input_port_count_changing (ChanCount to)
3752 {
3753         list<pair<ChanCount, ChanCount> > c = try_configure_processors (to, 0);
3754         if (c.empty()) {
3755                 /* The processors cannot be configured with the new input arrangement, so
3756                    block the change.
3757                 */
3758                 return true;
3759         }
3760
3761         /* The change is ok */
3762         return false;
3763 }
3764
3765 list<string>
3766 Route::unknown_processors () const
3767 {
3768         list<string> p;
3769
3770         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3771         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
3772                 if (boost::dynamic_pointer_cast<UnknownProcessor const> (*i)) {
3773                         p.push_back ((*i)->name ());
3774                 }
3775         }
3776
3777         return p;
3778 }
3779
3780
3781 framecnt_t
3782 Route::update_port_latencies (PortSet& from, PortSet& to, bool playback, framecnt_t our_latency) const
3783 {
3784         /* we assume that all our input ports feed all our output ports. its not
3785            universally true, but the alternative is way too corner-case to worry about.
3786         */
3787
3788         jack_latency_range_t all_connections;
3789
3790         if (from.empty()) {
3791                 all_connections.min = 0;
3792                 all_connections.max = 0;
3793         } else {
3794                 all_connections.min = ~((jack_nframes_t) 0);
3795                 all_connections.max = 0;
3796
3797                 /* iterate over all "from" ports and determine the latency range for all of their
3798                    connections to the "outside" (outside of this Route).
3799                 */
3800
3801                 for (PortSet::iterator p = from.begin(); p != from.end(); ++p) {
3802
3803                         jack_latency_range_t range;
3804
3805                         p->get_connected_latency_range (range, playback);
3806
3807                         all_connections.min = min (all_connections.min, range.min);
3808                         all_connections.max = max (all_connections.max, range.max);
3809                 }
3810         }
3811
3812         /* set the "from" port latencies to the max/min range of all their connections */
3813
3814         for (PortSet::iterator p = from.begin(); p != from.end(); ++p) {
3815                 p->set_private_latency_range (all_connections, playback);
3816         }
3817
3818         /* set the ports "in the direction of the flow" to the same value as above plus our own signal latency */
3819
3820         all_connections.min += our_latency;
3821         all_connections.max += our_latency;
3822
3823         for (PortSet::iterator p = to.begin(); p != to.end(); ++p) {
3824                 p->set_private_latency_range (all_connections, playback);
3825         }
3826
3827         return all_connections.max;
3828 }
3829
3830 framecnt_t
3831 Route::set_private_port_latencies (bool playback) const
3832 {
3833         framecnt_t own_latency = 0;
3834
3835         /* Processor list not protected by lock: MUST BE CALLED FROM PROCESS THREAD
3836            OR LATENCY CALLBACK.
3837
3838            This is called (early) from the latency callback. It computes the REAL
3839            latency associated with each port and stores the result as the "private"
3840            latency of the port. A later call to Route::set_public_port_latencies()
3841            sets all ports to the same value to reflect the fact that we do latency
3842            compensation and so all signals are delayed by the same amount as they
3843            flow through ardour.
3844         */
3845
3846         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
3847                 if ((*i)->active ()) {
3848                         own_latency += (*i)->signal_latency ();
3849                 }
3850         }
3851
3852         if (playback) {
3853                 /* playback: propagate latency from "outside the route" to outputs to inputs */
3854                 return update_port_latencies (_output->ports (), _input->ports (), true, own_latency);
3855         } else {
3856                 /* capture: propagate latency from "outside the route" to inputs to outputs */
3857                 return update_port_latencies (_input->ports (), _output->ports (), false, own_latency);
3858         }
3859 }
3860
3861 void
3862 Route::set_public_port_latencies (framecnt_t value, bool playback) const
3863 {
3864         /* this is called to set the JACK-visible port latencies, which take
3865            latency compensation into account.
3866         */
3867
3868         jack_latency_range_t range;
3869
3870         range.min = value;
3871         range.max = value;
3872
3873         {
3874                 const PortSet& ports (_input->ports());
3875                 for (PortSet::const_iterator p = ports.begin(); p != ports.end(); ++p) {
3876                         p->set_public_latency_range (range, playback);
3877                 }
3878         }
3879
3880         {
3881                 const PortSet& ports (_output->ports());
3882                 for (PortSet::const_iterator p = ports.begin(); p != ports.end(); ++p) {
3883                         p->set_public_latency_range (range, playback);
3884                 }
3885         }
3886 }
3887
3888 /** Put the invisible processors in the right place in _processors.
3889  *  Must be called with a writer lock on _processor_lock held.
3890  */
3891 void
3892 Route::setup_invisible_processors ()
3893 {
3894 #ifndef NDEBUG
3895         Glib::Threads::RWLock::WriterLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
3896         assert (!lm.locked ());
3897 #endif
3898
3899         if (!_main_outs) {
3900                 /* too early to be doing this stuff */
3901                 return;
3902         }
3903
3904         /* we'll build this new list here and then use it */
3905
3906         ProcessorList new_processors;
3907
3908         /* find visible processors */
3909
3910         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3911                 if ((*i)->display_to_user ()) {
3912                         new_processors.push_back (*i);
3913                 }
3914         }
3915
3916         /* find the amp */
3917
3918         ProcessorList::iterator amp = new_processors.begin ();
3919         while (amp != new_processors.end() && boost::dynamic_pointer_cast<Amp> (*amp) == 0) {
3920                 ++amp;
3921         }
3922
3923         assert (amp != _processors.end ());
3924
3925         /* and the processor after the amp */
3926
3927         ProcessorList::iterator after_amp = amp;
3928         ++after_amp;
3929
3930         /* METER */
3931
3932         if (_meter) {
3933                 switch (_meter_point) {
3934                 case MeterInput:
3935                         assert (!_meter->display_to_user ());
3936                         new_processors.push_front (_meter);
3937                         break;
3938                 case MeterPreFader:
3939                         assert (!_meter->display_to_user ());
3940                         new_processors.insert (amp, _meter);
3941                         break;
3942                 case MeterPostFader:
3943                         /* do nothing here */
3944                         break;
3945                 case MeterOutput:
3946                         /* do nothing here */
3947                         break;
3948                 case MeterCustom:
3949                         /* the meter is visible, so we don't touch it here */
3950                         break;
3951                 }
3952         }
3953
3954         /* MAIN OUTS */
3955
3956         assert (_main_outs);
3957         assert (!_main_outs->display_to_user ());
3958         new_processors.push_back (_main_outs);
3959
3960         /* iterator for the main outs */
3961
3962         ProcessorList::iterator main = new_processors.end();
3963         --main;
3964
3965         /* OUTPUT METERING */
3966
3967         if (_meter && (_meter_point == MeterOutput || _meter_point == MeterPostFader)) {
3968                 assert (!_meter->display_to_user ());
3969
3970                 /* add the processor just before or just after the main outs */
3971
3972                 ProcessorList::iterator meter_point = main;
3973
3974                 if (_meter_point == MeterOutput) {
3975                         ++meter_point;
3976                 }
3977                 new_processors.insert (meter_point, _meter);
3978         }
3979
3980         /* MONITOR SEND */
3981
3982         if (_monitor_send && !is_monitor ()) {
3983                 assert (!_monitor_send->display_to_user ());
3984                 if (Config->get_solo_control_is_listen_control()) {
3985                         switch (Config->get_listen_position ()) {
3986                         case PreFaderListen:
3987                                 switch (Config->get_pfl_position ()) {
3988                                 case PFLFromBeforeProcessors:
3989                                         new_processors.push_front (_monitor_send);
3990                                         break;
3991                                 case PFLFromAfterProcessors:
3992                                         new_processors.insert (amp, _monitor_send);
3993                                         break;
3994                                 }
3995                                 _monitor_send->set_can_pan (false);
3996                                 break;
3997                         case AfterFaderListen:
3998                                 switch (Config->get_afl_position ()) {
3999                                 case AFLFromBeforeProcessors:
4000                                         new_processors.insert (after_amp, _monitor_send);
4001                                         break;
4002                                 case AFLFromAfterProcessors:
4003                                         new_processors.insert (new_processors.end(), _monitor_send);
4004                                         break;
4005                                 }
4006                                 _monitor_send->set_can_pan (true);
4007                                 break;
4008                         }
4009                 }  else {
4010                         new_processors.insert (new_processors.end(), _monitor_send);
4011                         _monitor_send->set_can_pan (false);
4012                 }
4013         }
4014
4015         /* MONITOR CONTROL */
4016
4017         if (_monitor_control && is_monitor ()) {
4018                 assert (!_monitor_control->display_to_user ());
4019                 new_processors.push_front (_monitor_control);
4020         }
4021
4022         /* INTERNAL RETURN */
4023
4024         /* doing this here means that any monitor control will come just after
4025            the return.
4026         */
4027
4028         if (_intreturn) {
4029                 assert (!_intreturn->display_to_user ());
4030                 new_processors.push_front (_intreturn);
4031         }
4032
4033         /* EXPORT PROCESSOR */
4034
4035         if (_capturing_processor) {
4036                 assert (!_capturing_processor->display_to_user ());
4037                 new_processors.push_front (_capturing_processor);
4038         }
4039
4040         _processors = new_processors;
4041
4042         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: setup_invisible_processors\n", _name));
4043         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4044                 DEBUG_TRACE (DEBUG::Processors, string_compose ("\t%1\n", (*i)->name ()));
4045         }
4046 }
4047
4048 void
4049 Route::unpan ()
4050 {
4051         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
4052         Glib::Threads::RWLock::ReaderLock lp (_processor_lock);
4053
4054         _pannable.reset ();
4055
4056         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4057                 boost::shared_ptr<Delivery> d = boost::dynamic_pointer_cast<Delivery>(*i);
4058                 if (d) {
4059                         d->unpan ();
4060                 }
4061         }
4062 }
4063
4064 /** If the meter point is `Custom', make a note of where the meter is.
4065  *  This is so that if the meter point is subsequently set to something else,
4066  *  and then back to custom, we can put the meter back where it was last time
4067  *  custom was enabled.
4068  *
4069  *  Must be called with the _processor_lock held.
4070  */
4071 void
4072 Route::maybe_note_meter_position ()
4073 {
4074         if (_meter_point != MeterCustom) {
4075                 return;
4076         }
4077
4078         _custom_meter_position_noted = true;
4079         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4080                 if (boost::dynamic_pointer_cast<PeakMeter> (*i)) {
4081                         ProcessorList::iterator j = i;
4082                         ++j;
4083                         if (j != _processors.end ()) {
4084                                 _processor_after_last_custom_meter = *j;
4085                                 _last_custom_meter_was_at_end = false;
4086                         } else {
4087                                 _last_custom_meter_was_at_end = true;
4088                         }
4089                 }
4090         }
4091 }
4092
4093 boost::shared_ptr<Processor>
4094 Route::processor_by_id (PBD::ID id) const
4095 {
4096         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4097         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4098                 if ((*i)->id() == id) {
4099                         return *i;
4100                 }
4101         }
4102
4103         return boost::shared_ptr<Processor> ();
4104 }
4105
4106 /** @return the monitoring state, or in other words what data we are pushing
4107  *  into the route (data from the inputs, data from disk or silence)
4108  */
4109 MonitorState
4110 Route::monitoring_state () const
4111 {
4112         return MonitoringInput;
4113 }
4114
4115 /** @return what we should be metering; either the data coming from the input
4116  *  IO or the data that is flowing through the route.
4117  */
4118 MeterState
4119 Route::metering_state () const
4120 {
4121         return MeteringRoute;
4122 }
4123
4124 bool
4125 Route::has_external_redirects () const
4126 {
4127         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4128
4129                 /* ignore inactive processors and obviously ignore the main
4130                  * outs since everything has them and we don't care.
4131                  */
4132
4133                 if ((*i)->active() && (*i) != _main_outs && (*i)->does_routing()) {
4134                         return true;;
4135                 }
4136         }
4137
4138         return false;
4139 }
4140
4141 boost::shared_ptr<Processor>
4142 Route::the_instrument () const
4143 {
4144         Glib::Threads::RWLock::WriterLock lm (_processor_lock);
4145         return the_instrument_unlocked ();
4146 }
4147
4148 boost::shared_ptr<Processor>
4149 Route::the_instrument_unlocked () const
4150 {
4151         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4152                 if (boost::dynamic_pointer_cast<PluginInsert>(*i)) {
4153                         if ((*i)->input_streams().n_midi() > 0 &&
4154                             (*i)->output_streams().n_audio() > 0) {
4155                                 return (*i);
4156                         }
4157                 }
4158         }
4159         return boost::shared_ptr<Processor>();
4160 }
4161
4162
4163
4164 void
4165 Route::non_realtime_locate (framepos_t pos)
4166 {
4167         if (_pannable) {
4168                 _pannable->transport_located (pos);
4169         }
4170
4171         {
4172                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
4173
4174                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4175                         (*i)->transport_located (pos);
4176                 }
4177         }
4178 }
4179
4180 void
4181 Route::fill_buffers_with_input (BufferSet& bufs, boost::shared_ptr<IO> io, pframes_t nframes)
4182 {
4183         size_t n_buffers;
4184         size_t i;
4185
4186         /* MIDI
4187          *
4188          * We don't currently mix MIDI input together, so we don't need the
4189          * complex logic of the audio case.
4190          */
4191
4192         n_buffers = bufs.count().n_midi ();
4193
4194         for (i = 0; i < n_buffers; ++i) {
4195
4196                 boost::shared_ptr<MidiPort> source_port = io->midi (i);
4197                 MidiBuffer& buf (bufs.get_midi (i));
4198
4199                 if (source_port) {
4200                         buf.copy (source_port->get_midi_buffer(nframes));
4201                 } else {
4202                         buf.silence (nframes);
4203                 }
4204         }
4205
4206         /* AUDIO */
4207
4208         n_buffers = bufs.count().n_audio();
4209
4210         size_t n_ports = io->n_ports().n_audio();
4211         float scaling = 1.0f;
4212
4213         if (n_ports > n_buffers) {
4214                 scaling = ((float) n_buffers) / n_ports;
4215         }
4216
4217         for (i = 0; i < n_ports; ++i) {
4218
4219                 /* if there are more ports than buffers, map them onto buffers
4220                  * in a round-robin fashion
4221                  */
4222
4223                 boost::shared_ptr<AudioPort> source_port = io->audio (i);
4224                 AudioBuffer& buf (bufs.get_audio (i%n_buffers));
4225
4226
4227                 if (i < n_buffers) {
4228
4229                         /* first time through just copy a channel into
4230                            the output buffer.
4231                         */
4232
4233                         buf.read_from (source_port->get_audio_buffer (nframes), nframes);
4234
4235                         if (scaling != 1.0f) {
4236                                 buf.apply_gain (scaling, nframes);
4237                         }
4238
4239                 } else {
4240
4241                         /* on subsequent times around, merge data from
4242                          * the port with what is already there
4243                          */
4244
4245                         if (scaling != 1.0f) {
4246                                 buf.accumulate_with_gain_from (source_port->get_audio_buffer (nframes), nframes, 0, scaling);
4247                         } else {
4248                                 buf.accumulate_from (source_port->get_audio_buffer (nframes), nframes);
4249                         }
4250                 }
4251         }
4252
4253         /* silence any remaining buffers */
4254
4255         for (; i < n_buffers; ++i) {
4256                 AudioBuffer& buf (bufs.get_audio (i));
4257                 buf.silence (nframes);
4258         }
4259
4260         /* establish the initial setup of the buffer set, reflecting what was
4261            copied into it. unless, of course, we are the auditioner, in which
4262            case nothing was fed into it from the inputs at all.
4263         */
4264
4265         if (!is_auditioner()) {
4266                 bufs.set_count (io->n_ports());
4267         }
4268 }