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 <cassert>
  26 #include <algorithm>
  27
  28 #include <glibmm.h>
  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/unwind.h"
  37
  38 #include "ardour/amp.h"
  39 #include "ardour/audio_buffer.h"
  40 #include "ardour/audio_track.h"
  41 #include "ardour/audio_port.h"
  42 #include "ardour/audioengine.h"
  43 #include "ardour/boost_debug.h"
  44 #include "ardour/buffer.h"
  45 #include "ardour/buffer_set.h"
  46 #include "ardour/capturing_processor.h"
  47 #include "ardour/debug.h"
  48 #include "ardour/delivery.h"
  49 #include "ardour/gain_control.h"
  50 #include "ardour/internal_return.h"
  51 #include "ardour/internal_send.h"
  52 #include "ardour/meter.h"
  53 #include "ardour/delayline.h"
  54 #include "ardour/midi_buffer.h"
  55 #include "ardour/midi_port.h"
  56 #include "ardour/monitor_processor.h"
  57 #include "ardour/pannable.h"
  58 #include "ardour/panner.h"
  59 #include "ardour/panner_shell.h"
  60 #include "ardour/parameter_descriptor.h"
  61 #include "ardour/phase_control.h"
  62 #include "ardour/plugin_insert.h"
  63 #include "ardour/port.h"
  64 #include "ardour/port_insert.h"
  65 #include "ardour/processor.h"
  66 #include "ardour/profile.h"
  67 #include "ardour/route.h"
  68 #include "ardour/route_group.h"
  69 #include "ardour/send.h"
  70 #include "ardour/session.h"
  71 #include "ardour/solo_control.h"
  72 #include "ardour/solo_isolate_control.h"
  73 #include "ardour/unknown_processor.h"
  74 #include "ardour/utils.h"
  75 #include "ardour/vca.h"
  76
  77 #include "pbd/i18n.h"
  78
  79 using namespace std;
  80 using namespace ARDOUR;
  81 using namespace PBD;
  82
  83 PBD::Signal3<int,boost::shared_ptr<Route>, boost::shared_ptr<PluginInsert>, Route::PluginSetupOptions > Route::PluginSetup;
  84
  85 /** Base class for all routable/mixable objects (tracks and busses) */
  86 Route::Route (Session& sess, string name, PresentationInfo::Flag flag, DataType default_type)
  87         : Stripable (sess, name, PresentationInfo (flag))
  88         , GraphNode (sess._process_graph)
  89         , Muteable (sess, name)
  90         , Automatable (sess)
  91         , _active (true)
  92         , _signal_latency (0)
  93         , _signal_latency_at_amp_position (0)
  94         , _signal_latency_at_trim_position (0)
  95         , _initial_delay (0)
  96         , _roll_delay (0)
  97         , _pending_process_reorder (0)
  98         , _pending_signals (0)
  99         , _pending_declick (true)
 100         , _meter_point (MeterPostFader)
 101         , _pending_meter_point (MeterPostFader)
 102         , _meter_type (MeterPeak)
 103         , _denormal_protection (false)
 104         , _recordable (true)
 105         , _silent (false)
 106         , _declickable (false)
 107         , _have_internal_generator (false)
 108         , _default_type (default_type)
 109         , _track_number (0)
 110         , _in_configure_processors (false)
 111         , _initial_io_setup (false)
 112         , _in_sidechain_setup (false)
 113         , _strict_io (false)
 114         , _custom_meter_position_noted (false)
 115         , _pinmgr_proxy (0)
 116 {
 117         processor_max_streams.reset();
 118 }
 119
 120 int
 121 Route::init ()
 122 {
 123         /* set default meter type */
 124         if (is_master()) {
 125                 _meter_type = Config->get_meter_type_master ();
 126         }
 127         else if (dynamic_cast<Track*>(this)) {
 128                 _meter_type = Config->get_meter_type_track ();
 129         } else {
 130                 _meter_type = Config->get_meter_type_bus ();
 131         }
 132
 133         /* add standard controls */
 134
 135         _gain_control.reset (new GainControl (_session, GainAutomation));
 136         add_control (_gain_control);
 137
 138         _trim_control.reset (new GainControl (_session, TrimAutomation));
 139         add_control (_trim_control);
 140
 141         _solo_control.reset (new SoloControl (_session, X_("solo"), *this, *this));
 142         add_control (_solo_control);
 143         _solo_control->Changed.connect_same_thread (*this, boost::bind (&Route::solo_control_changed, this, _1, _2));
 144
 145         _mute_control.reset (new MuteControl (_session, X_("mute"), *this));
 146         add_control (_mute_control);
 147
 148         _phase_control.reset (new PhaseControl (_session, X_("phase")));
 149         add_control (_phase_control);
 150
 151         _solo_isolate_control.reset (new SoloIsolateControl (_session, X_("solo-iso"), *this, *this));
 152         add_control (_solo_isolate_control);
 153
 154         _solo_safe_control.reset (new SoloSafeControl (_session, X_("solo-safe")));
 155         add_control (_solo_safe_control);
 156
 157         /* panning */
 158
 159         if (!(_presentation_info.flags() & PresentationInfo::MonitorOut)) {
 160                 _pannable.reset (new Pannable (_session));
 161         }
 162
 163         /* input and output objects */
 164
 165         _input.reset (new IO (_session, _name, IO::Input, _default_type));
 166         _output.reset (new IO (_session, _name, IO::Output, _default_type));
 167
 168         _input->changed.connect_same_thread (*this, boost::bind (&Route::input_change_handler, this, _1, _2));
 169         _input->PortCountChanging.connect_same_thread (*this, boost::bind (&Route::input_port_count_changing, this, _1));
 170
 171         _output->changed.connect_same_thread (*this, boost::bind (&Route::output_change_handler, this, _1, _2));
 172         _output->PortCountChanging.connect_same_thread (*this, boost::bind (&Route::output_port_count_changing, this, _1));
 173
 174         /* add the amp/fader processor.
 175          * it should be the first processor to be added on every route.
 176          */
 177
 178         _amp.reset (new Amp (_session, X_("Fader"), _gain_control, true));
 179         add_processor (_amp, PostFader);
 180
 181         if (is_monitor ()) {
 182                 _amp->set_display_name (_("Monitor"));
 183         }
 184
 185 #if 0 // not used - just yet
 186         if (!is_master() && !is_monitor() && !is_auditioner()) {
 187                 _delayline.reset (new DelayLine (_session, _name));
 188                 add_processor (_delayline, PreFader);
 189         }
 190 #endif
 191
 192         /* and input trim */
 193
 194         _trim.reset (new Amp (_session, X_("Trim"), _trim_control, false));
 195         _trim->set_display_to_user (false);
 196
 197         if (dynamic_cast<AudioTrack*>(this)) {
 198                 /* we can't do this in the AudioTrack's constructor
 199                  * because _trim does not exit then
 200                  */
 201                 _trim->activate();
 202         }
 203         else if (!dynamic_cast<Track*>(this) && ! ( is_monitor() || is_auditioner() )) {
 204                 /* regular bus */
 205                 _trim->activate();
 206         }
 207
 208         /* create standard processors: meter, main outs, monitor out;
 209            they will be added to _processors by setup_invisible_processors ()
 210         */
 211
 212         _meter.reset (new PeakMeter (_session, _name));
 213         _meter->set_owner (this);
 214         _meter->set_display_to_user (false);
 215         _meter->activate ();
 216
 217         _main_outs.reset (new Delivery (_session, _output, _pannable, _mute_master, _name, Delivery::Main));
 218         _main_outs->activate ();
 219
 220         if (is_monitor()) {
 221                 /* where we listen to tracks */
 222                 _intreturn.reset (new InternalReturn (_session));
 223                 _intreturn->activate ();
 224
 225                 /* the thing that provides proper control over a control/monitor/listen bus
 226                    (such as per-channel cut, dim, solo, invert, etc).
 227                 */
 228                 _monitor_control.reset (new MonitorProcessor (_session));
 229                 _monitor_control->activate ();
 230         }
 231
 232         if (is_master() || is_monitor() || is_auditioner()) {
 233                 _mute_master->set_solo_ignore (true);
 234         }
 235
 236         /* now that we have _meter, its safe to connect to this */
 237
 238         {
 239                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
 240                 configure_processors (0);
 241         }
 242
 243         return 0;
 244 }
 245
 246 Route::~Route ()
 247 {
 248         DEBUG_TRACE (DEBUG::Destruction, string_compose ("route %1 destructor\n", _name));
 249
 250         /* do this early so that we don't get incoming signals as we are going through destruction
 251          */
 252
 253         drop_connections ();
 254
 255         /* don't use clear_processors here, as it depends on the session which may
 256            be half-destroyed by now
 257         */
 258
 259         Glib::Threads::RWLock::WriterLock lm (_processor_lock);
 260         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 261                 (*i)->drop_references ();
 262         }
 263
 264         _processors.clear ();
 265 }
 266
 267 string
 268 Route::ensure_track_or_route_name(string name, Session &session)
 269 {
 270         string newname = name;
 271
 272         while (!session.io_name_is_legal (newname)) {
 273                 newname = bump_name_once (newname, ' ');
 274         }
 275
 276         return newname;
 277 }
 278
 279 void
 280 Route::set_trim (gain_t val, Controllable::GroupControlDisposition /* group override */)
 281 {
 282         // TODO route group, see set_gain()
 283         // _trim_control->route_set_value (val);
 284 }
 285
 286 void
 287 Route::maybe_declick (BufferSet&, framecnt_t, int)
 288 {
 289         /* this is the "bus" implementation and they never declick.
 290          */
 291         return;
 292 }
 293
 294 /** Process this route for one (sub) cycle (process thread)
 295  *
 296  * @param bufs Scratch buffers to use for the signal path
 297  * @param start_frame Initial transport frame
 298  * @param end_frame Final transport frame
 299  * @param nframes Number of frames to output (to ports)
 300  *
 301  * Note that (end_frame - start_frame) may not be equal to nframes when the
 302  * transport speed isn't 1.0 (eg varispeed).
 303  */
 304 void
 305 Route::process_output_buffers (BufferSet& bufs,
 306                                framepos_t start_frame, framepos_t end_frame, pframes_t nframes,
 307                                int declick, bool gain_automation_ok)
 308 {
 309         /* Caller must hold process lock */
 310         assert (!AudioEngine::instance()->process_lock().trylock());
 311
 312         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
 313         if (!lm.locked()) {
 314                 // can this actually happen? functions calling process_output_buffers()
 315                 // already take a reader-lock.
 316                 bufs.silence (nframes, 0);
 317                 return;
 318         }
 319
 320         _mute_control->automation_run (start_frame, nframes);
 321
 322         /* figure out if we're going to use gain automation */
 323         if (gain_automation_ok) {
 324                 _amp->set_gain_automation_buffer (_session.gain_automation_buffer ());
 325                 _amp->setup_gain_automation (
 326                                 start_frame + _signal_latency_at_amp_position,
 327                                 end_frame + _signal_latency_at_amp_position,
 328                                 nframes);
 329
 330                 _trim->set_gain_automation_buffer (_session.trim_automation_buffer ());
 331                 _trim->setup_gain_automation (
 332                                 start_frame + _signal_latency_at_trim_position,
 333                                 end_frame + _signal_latency_at_trim_position,
 334                                 nframes);
 335         } else {
 336                 _amp->apply_gain_automation (false);
 337                 _trim->apply_gain_automation (false);
 338         }
 339
 340         /* Tell main outs what to do about monitoring.  We do this so that
 341            on a transition between monitoring states we get a de-clicking gain
 342            change in the _main_outs delivery, if config.get_use_monitor_fades()
 343            is true.
 344
 345            We override this in the case where we have an internal generator.
 346         */
 347         bool silence = _have_internal_generator ? false : (monitoring_state () == MonitoringSilence);
 348
 349         _main_outs->no_outs_cuz_we_no_monitor (silence);
 350
 351         /* -------------------------------------------------------------------------------------------
 352            GLOBAL DECLICK (for transport changes etc.)
 353            ----------------------------------------------------------------------------------------- */
 354
 355         maybe_declick (bufs, nframes, declick);
 356         _pending_declick = 0;
 357
 358         /* -------------------------------------------------------------------------------------------
 359            DENORMAL CONTROL/PHASE INVERT
 360            ----------------------------------------------------------------------------------------- */
 361
 362         if (!_phase_control->none()) {
 363
 364                 int chn = 0;
 365
 366                 if (_denormal_protection || Config->get_denormal_protection()) {
 367
 368                         for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i, ++chn) {
 369                                 Sample* const sp = i->data();
 370
 371                                 if (_phase_control->inverted (chn)) {
 372                                         for (pframes_t nx = 0; nx < nframes; ++nx) {
 373                                                 sp[nx]  = -sp[nx];
 374                                                 sp[nx] += 1.0e-27f;
 375                                         }
 376                                 } else {
 377                                         for (pframes_t nx = 0; nx < nframes; ++nx) {
 378                                                 sp[nx] += 1.0e-27f;
 379                                         }
 380                                 }
 381                         }
 382
 383                 } else {
 384
 385                         for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i, ++chn) {
 386                                 Sample* const sp = i->data();
 387
 388                                 if (_phase_control->inverted (chn)) {
 389                                         for (pframes_t nx = 0; nx < nframes; ++nx) {
 390                                                 sp[nx] = -sp[nx];
 391                                         }
 392                                 }
 393                         }
 394                 }
 395
 396         } else {
 397
 398                 if (_denormal_protection || Config->get_denormal_protection()) {
 399
 400                         for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) {
 401                                 Sample* const sp = i->data();
 402                                 for (pframes_t nx = 0; nx < nframes; ++nx) {
 403                                         sp[nx] += 1.0e-27f;
 404                                 }
 405                         }
 406
 407                 }
 408         }
 409
 410         /* -------------------------------------------------------------------------------------------
 411            and go ....
 412            ----------------------------------------------------------------------------------------- */
 413
 414         /* set this to be true if the meter will already have been ::run() earlier */
 415         bool const meter_already_run = metering_state() == MeteringInput;
 416
 417         framecnt_t latency = 0;
 418         const double speed = _session.transport_speed ();
 419
 420         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
 421
 422                 if (meter_already_run && boost::dynamic_pointer_cast<PeakMeter> (*i)) {
 423                         /* don't ::run() the meter, otherwise it will have its previous peak corrupted */
 424                         continue;
 425                 }
 426
 427 #ifndef NDEBUG
 428                 /* if it has any inputs, make sure they match */
 429                 if (boost::dynamic_pointer_cast<UnknownProcessor> (*i) == 0 && (*i)->input_streams() != ChanCount::ZERO) {
 430                         if (bufs.count() != (*i)->input_streams()) {
 431                                 DEBUG_TRACE (
 432                                         DEBUG::Processors, string_compose (
 433                                                 "input port mismatch %1 bufs = %2 input for %3 = %4\n",
 434                                                 _name, bufs.count(), (*i)->name(), (*i)->input_streams()
 435                                                 )
 436                                         );
 437                         }
 438                 }
 439 #endif
 440
 441                 /* should we NOT run plugins here if the route is inactive?
 442                    do we catch route != active somewhere higher?
 443                 */
 444
 445                 if (boost::dynamic_pointer_cast<Send>(*i) != 0) {
 446                         boost::dynamic_pointer_cast<Send>(*i)->set_delay_in(_signal_latency - latency);
 447                 }
 448                 if (boost::dynamic_pointer_cast<PluginInsert>(*i) != 0) {
 449                         const framecnt_t longest_session_latency = _initial_delay + _signal_latency;
 450                         boost::dynamic_pointer_cast<PluginInsert>(*i)->set_sidechain_latency (
 451                                         _initial_delay + latency, longest_session_latency - latency);
 452                 }
 453
 454                 (*i)->run (bufs, start_frame - latency, end_frame - latency, speed, nframes, *i != _processors.back());
 455                 bufs.set_count ((*i)->output_streams());
 456
 457                 if ((*i)->active ()) {
 458                         latency += (*i)->signal_latency ();
 459                 }
 460         }
 461 }
 462
 463 void
 464 Route::bounce_process (BufferSet& buffers, framepos_t start, framecnt_t nframes,
 465                 boost::shared_ptr<Processor> endpoint,
 466                 bool include_endpoint, bool for_export, bool for_freeze)
 467 {
 468         /* If no processing is required, there's no need to go any further. */
 469         if (!endpoint && !include_endpoint) {
 470                 return;
 471         }
 472
 473         framecnt_t latency = bounce_get_latency(_amp, false, for_export, for_freeze);
 474         _amp->set_gain_automation_buffer (_session.gain_automation_buffer ());
 475         _amp->setup_gain_automation (start - latency, start - latency + nframes, nframes);
 476
 477         /* trim is always at the top, for bounce no latency compensation is needed */
 478         _trim->set_gain_automation_buffer (_session.trim_automation_buffer ());
 479         _trim->setup_gain_automation (start, start + nframes, nframes);
 480
 481         latency = 0;
 482         const double speed = _session.transport_speed ();
 483         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 484
 485                 if (!include_endpoint && (*i) == endpoint) {
 486                         break;
 487                 }
 488
 489                 /* if we're *not* exporting, stop processing if we come across a routing processor. */
 490                 if (!for_export && boost::dynamic_pointer_cast<PortInsert>(*i)) {
 491                         break;
 492                 }
 493                 if (!for_export && for_freeze && (*i)->does_routing() && (*i)->active()) {
 494                         break;
 495                 }
 496
 497                 /* special case the panner (export outputs)
 498                  * Ideally we'd only run the panner, not the delivery itself...
 499                  * but panners need separate input/output buffers and some context
 500                  * (panshell, panner type, etc). AFAICT there is no ill side effect
 501                  * of re-using the main delivery when freewheeling/exporting a region.
 502                  */
 503                 if ((*i) == _main_outs) {
 504                         assert ((*i)->does_routing());
 505                         (*i)->run (buffers, start - latency, start - latency + nframes, speed, nframes, true);
 506                         buffers.set_count ((*i)->output_streams());
 507                 }
 508
 509                 /* don't run any processors that do routing.
 510                  * Also don't bother with metering.
 511                  */
 512                 if (!(*i)->does_routing() && !boost::dynamic_pointer_cast<PeakMeter>(*i)) {
 513                         (*i)->run (buffers, start - latency, start - latency + nframes, 1.0, nframes, true);
 514                         buffers.set_count ((*i)->output_streams());
 515                         latency += (*i)->signal_latency ();
 516                 }
 517
 518                 if ((*i) == endpoint) {
 519                         break;
 520                 }
 521         }
 522 }
 523
 524 framecnt_t
 525 Route::bounce_get_latency (boost::shared_ptr<Processor> endpoint,
 526                 bool include_endpoint, bool for_export, bool for_freeze) const
 527 {
 528         framecnt_t latency = 0;
 529         if (!endpoint && !include_endpoint) {
 530                 return latency;
 531         }
 532
 533         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
 534                 if (!include_endpoint && (*i) == endpoint) {
 535                         break;
 536                 }
 537                 if (!for_export && boost::dynamic_pointer_cast<PortInsert>(*i)) {
 538                         break;
 539                 }
 540                 if (!for_export && for_freeze && (*i)->does_routing() && (*i)->active()) {
 541                         break;
 542                 }
 543                 if (!(*i)->does_routing() && !boost::dynamic_pointer_cast<PeakMeter>(*i)) {
 544                         latency += (*i)->signal_latency ();
 545                 }
 546                 if ((*i) == endpoint) {
 547                         break;
 548                 }
 549         }
 550         return latency;
 551 }
 552
 553 ChanCount
 554 Route::bounce_get_output_streams (ChanCount &cc, boost::shared_ptr<Processor> endpoint,
 555                 bool include_endpoint, bool for_export, bool for_freeze) const
 556 {
 557         if (!endpoint && !include_endpoint) {
 558                 return cc;
 559         }
 560
 561         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
 562                 if (!include_endpoint && (*i) == endpoint) {
 563                         break;
 564                 }
 565                 if (!for_export && boost::dynamic_pointer_cast<PortInsert>(*i)) {
 566                         break;
 567                 }
 568                 if (!for_export && for_freeze && (*i)->does_routing() && (*i)->active()) {
 569                         break;
 570                 }
 571                 if (!(*i)->does_routing() && !boost::dynamic_pointer_cast<PeakMeter>(*i)) {
 572                         cc = (*i)->output_streams();
 573                 }
 574                 if ((*i) == endpoint) {
 575                         break;
 576                 }
 577         }
 578         return cc;
 579 }
 580
 581 ChanCount
 582 Route::n_process_buffers ()
 583 {
 584         return max (_input->n_ports(), processor_max_streams);
 585 }
 586
 587 void
 588 Route::monitor_run (framepos_t start_frame, framepos_t end_frame, pframes_t nframes, int declick)
 589 {
 590         assert (is_monitor());
 591         BufferSet& bufs (_session.get_route_buffers (n_process_buffers()));
 592         fill_buffers_with_input (bufs, _input, nframes);
 593         passthru (bufs, start_frame, end_frame, nframes, declick);
 594 }
 595
 596 void
 597 Route::passthru (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame, pframes_t nframes, int declick)
 598 {
 599         _silent = false;
 600
 601         if (is_monitor() && _session.listening() && !_session.is_auditioning()) {
 602
 603                 /* control/monitor bus ignores input ports when something is
 604                    feeding the listen "stream". data will "arrive" into the
 605                    route from the intreturn processor element.
 606                 */
 607
 608                 bufs.silence (nframes, 0);
 609         }
 610
 611         write_out_of_band_data (bufs, start_frame, end_frame, nframes);
 612         process_output_buffers (bufs, start_frame, end_frame, nframes, declick, true);
 613 }
 614
 615 void
 616 Route::passthru_silence (framepos_t start_frame, framepos_t end_frame, pframes_t nframes, int declick)
 617 {
 618         BufferSet& bufs (_session.get_route_buffers (n_process_buffers(), true));
 619
 620         bufs.set_count (_input->n_ports());
 621         write_out_of_band_data (bufs, start_frame, end_frame, nframes);
 622         process_output_buffers (bufs, start_frame, end_frame, nframes, declick, false);
 623 }
 624
 625 void
 626 Route::set_listen (bool yn)
 627 {
 628         if (_monitor_send) {
 629                 if (yn) {
 630                         _monitor_send->activate ();
 631                 } else {
 632                         _monitor_send->deactivate ();
 633                 }
 634         }
 635 }
 636
 637 void
 638 Route::solo_control_changed (bool, Controllable::GroupControlDisposition)
 639 {
 640         /* nothing to do if we're not using AFL/PFL. But if we are, we need
 641            to alter the active state of the monitor send.
 642         */
 643
 644         if (Config->get_solo_control_is_listen_control ()) {
 645                 set_listen (_solo_control->self_soloed() || _solo_control->get_masters_value());
 646         }
 647 }
 648
 649 void
 650 Route::push_solo_isolate_upstream (int32_t delta)
 651 {
 652         /* forward propagate solo-isolate status to everything fed by this route, but not those via sends only */
 653
 654         boost::shared_ptr<RouteList> routes = _session.get_routes ();
 655         for (RouteList::iterator i = routes->begin(); i != routes->end(); ++i) {
 656
 657                 if ((*i).get() == this || !(*i)->can_solo()) {
 658                         continue;
 659                 }
 660
 661                 bool sends_only;
 662                 bool does_feed = feeds (*i, &sends_only);
 663
 664                 if (does_feed && !sends_only) {
 665                         (*i)->solo_isolate_control()->mod_solo_isolated_by_upstream (delta);
 666                 }
 667         }
 668 }
 669
 670 void
 671 Route::push_solo_upstream (int delta)
 672 {
 673         DEBUG_TRACE (DEBUG::Solo, string_compose("\t ... INVERT push from %1\n", _name));
 674         for (FedBy::iterator i = _fed_by.begin(); i != _fed_by.end(); ++i) {
 675                 if (i->sends_only) {
 676                         continue;
 677                 }
 678                 boost::shared_ptr<Route> sr (i->r.lock());
 679                 if (sr) {
 680                         sr->solo_control()->mod_solo_by_others_downstream (-delta);
 681                 }
 682         }
 683 }
 684
 685 #if 0
 686 static void
 687 dump_processors(const string& name, const list<boost::shared_ptr<Processor> >& procs)
 688 {
 689         cerr << name << " {" << endl;
 690         for (list<boost::shared_ptr<Processor> >::const_iterator p = procs.begin();
 691                         p != procs.end(); ++p) {
 692                 cerr << "\t" << (*p)->name() << " ID = " << (*p)->id() << " @ " << (*p) << endl;
 693         }
 694         cerr << "}" << endl;
 695 }
 696 #endif
 697
 698 /** Supposing that we want to insert a Processor at a given Placement, return
 699  *  the processor to add the new one before (or 0 to add at the end).
 700  */
 701 boost::shared_ptr<Processor>
 702 Route::before_processor_for_placement (Placement p)
 703 {
 704         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
 705
 706         ProcessorList::iterator loc;
 707
 708         if (p == PreFader) {
 709                 /* generic pre-fader: insert immediately before the amp */
 710                 loc = find (_processors.begin(), _processors.end(), _amp);
 711         } else {
 712                 /* generic post-fader: insert right before the main outs */
 713                 loc = find (_processors.begin(), _processors.end(), _main_outs);
 714         }
 715
 716         return loc != _processors.end() ? *loc : boost::shared_ptr<Processor> ();
 717 }
 718
 719 /** Supposing that we want to insert a Processor at a given index, return
 720  *  the processor to add the new one before (or 0 to add at the end).
 721  */
 722 boost::shared_ptr<Processor>
 723 Route::before_processor_for_index (int index)
 724 {
 725         if (index == -1) {
 726                 return boost::shared_ptr<Processor> ();
 727         }
 728
 729         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
 730
 731         ProcessorList::iterator i = _processors.begin ();
 732         int j = 0;
 733         while (i != _processors.end() && j < index) {
 734                 if ((*i)->display_to_user()) {
 735                         ++j;
 736                 }
 737
 738                 ++i;
 739         }
 740
 741         return (i != _processors.end() ? *i : boost::shared_ptr<Processor> ());
 742 }
 743
 744 /** Add a processor either pre- or post-fader
 745  *  @return 0 on success, non-0 on failure.
 746  */
 747 int
 748 Route::add_processor (boost::shared_ptr<Processor> processor, Placement placement, ProcessorStreams* err, bool activation_allowed)
 749 {
 750         return add_processor (processor, before_processor_for_placement (placement), err, activation_allowed);
 751 }
 752
 753
 754 /** Add a processor to a route such that it ends up with a given index into the visible processors.
 755  *  @param index Index to add the processor at, or -1 to add at the end of the list.
 756  *  @return 0 on success, non-0 on failure.
 757  */
 758 int
 759 Route::add_processor_by_index (boost::shared_ptr<Processor> processor, int index, ProcessorStreams* err, bool activation_allowed)
 760 {
 761         return add_processor (processor, before_processor_for_index (index), err, activation_allowed);
 762 }
 763
 764 /** Add a processor to the route.
 765  *  @param before An existing processor in the list, or 0; the new processor will be inserted immediately before it (or at the end).
 766  *  @return 0 on success, non-0 on failure.
 767  */
 768 int
 769 Route::add_processor (boost::shared_ptr<Processor> processor, boost::shared_ptr<Processor> before, ProcessorStreams* err, bool activation_allowed)
 770 {
 771         assert (processor != _meter);
 772         assert (processor != _main_outs);
 773
 774         DEBUG_TRACE (DEBUG::Processors, string_compose (
 775                              "%1 adding processor %2\n", name(), processor->name()));
 776
 777         ProcessorList pl;
 778
 779         pl.push_back (processor);
 780         int rv = add_processors (pl, before, err);
 781
 782         if (rv) {
 783                 return rv;
 784         }
 785
 786         if (activation_allowed && (!_session.get_bypass_all_loaded_plugins () || !processor->display_to_user ())) {
 787                 processor->activate ();
 788         }
 789
 790         return 0;
 791 }
 792
 793 void
 794 Route::processor_selfdestruct (boost::weak_ptr<Processor> wp)
 795 {
 796         /* We cannot destruct the processor here (usually RT-thread
 797          * with various locks held - in case of sends also io_locks).
 798          * Queue for deletion in low-priority thread.
 799          */
 800         Glib::Threads::Mutex::Lock lx (selfdestruct_lock);
 801         selfdestruct_sequence.push_back (wp);
 802 }
 803
 804 bool
 805 Route::add_processor_from_xml_2X (const XMLNode& node, int version)
 806 {
 807         XMLProperty const * prop;
 808
 809         try {
 810                 boost::shared_ptr<Processor> processor;
 811
 812                 /* bit of a hack: get the `placement' property from the <Redirect> tag here
 813                    so that we can add the processor in the right place (pre/post-fader)
 814                 */
 815
 816                 XMLNodeList const & children = node.children ();
 817                 XMLNodeList::const_iterator i = children.begin ();
 818
 819                 while (i != children.end() && (*i)->name() != X_("Redirect")) {
 820                         ++i;
 821                 }
 822
 823                 Placement placement = PreFader;
 824
 825                 if (i != children.end()) {
 826                         if ((prop = (*i)->property (X_("placement"))) != 0) {
 827                                 placement = Placement (string_2_enum (prop->value(), placement));
 828                         }
 829                 }
 830
 831                 if (node.name() == "Insert") {
 832
 833                         if ((prop = node.property ("type")) != 0) {
 834
 835                                 if (prop->value() == "ladspa" || prop->value() == "Ladspa" ||
 836                                                 prop->value() == "lv2" ||
 837                                                 prop->value() == "windows-vst" ||
 838                                                 prop->value() == "lxvst" ||
 839                                                 prop->value() == "audiounit") {
 840
 841                                         if (_session.get_disable_all_loaded_plugins ()) {
 842                                                 processor.reset (new UnknownProcessor (_session, node));
 843                                         } else {
 844                                                 processor.reset (new PluginInsert (_session));
 845                                                 processor->set_owner (this);
 846                                         }
 847
 848                                 } else {
 849
 850                                         processor.reset (new PortInsert (_session, _pannable, _mute_master));
 851                                 }
 852
 853                         }
 854
 855                 } else if (node.name() == "Send") {
 856
 857                         boost::shared_ptr<Pannable> sendpan (new Pannable (_session));
 858                         processor.reset (new Send (_session, sendpan, _mute_master));
 859
 860                 } else {
 861
 862                         error << string_compose(_("unknown Processor type \"%1\"; ignored"), node.name()) << endmsg;
 863                         return false;
 864                 }
 865
 866                 if (processor->set_state (node, version)) {
 867                         return false;
 868                 }
 869
 870                 //A2 uses the "active" flag in the toplevel redirect node, not in the child plugin/IO
 871                 if (i != children.end()) {
 872                         if ((prop = (*i)->property (X_("active"))) != 0) {
 873                                 if ( string_is_affirmative (prop->value()) && (!_session.get_bypass_all_loaded_plugins () || !processor->display_to_user () ) )
 874                                         processor->activate();
 875                                 else
 876                                         processor->deactivate();
 877                         }
 878                 }
 879
 880                 return (add_processor (processor, placement, 0, false) == 0);
 881         }
 882
 883         catch (failed_constructor &err) {
 884                 warning << _("processor could not be created. Ignored.") << endmsg;
 885                 return false;
 886         }
 887 }
 888
 889
 890 inline Route::PluginSetupOptions operator|= (Route::PluginSetupOptions& a, const Route::PluginSetupOptions& b) {
 891         return a = static_cast<Route::PluginSetupOptions> (static_cast <int>(a) | static_cast<int> (b));
 892 }
 893
 894 inline Route::PluginSetupOptions operator&= (Route::PluginSetupOptions& a, const Route::PluginSetupOptions& b) {
 895         return a = static_cast<Route::PluginSetupOptions> (static_cast <int>(a) & static_cast<int> (b));
 896 }
 897
 898 int
 899 Route::add_processors (const ProcessorList& others, boost::shared_ptr<Processor> before, ProcessorStreams* err)
 900 {
 901         ProcessorList::iterator loc;
 902
 903         if (before) {
 904                 loc = find(_processors.begin(), _processors.end(), before);
 905                 if (loc == _processors.end ()) {
 906                         return 1;
 907                 }
 908         } else {
 909                 /* nothing specified - at end */
 910                 loc = _processors.end ();
 911         }
 912
 913         if (!AudioEngine::instance()->connected()) {
 914                 return 1;
 915         }
 916
 917         if (others.empty()) {
 918                 return 0;
 919         }
 920
 921         ProcessorList to_skip;
 922
 923         // check if there's an instrument to replace or configure
 924         for (ProcessorList::const_iterator i = others.begin(); i != others.end(); ++i) {
 925                 boost::shared_ptr<PluginInsert> pi;
 926                 if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) == 0) {
 927                         continue;
 928                 }
 929                 if (!pi->plugin ()->get_info ()->is_instrument ()) {
 930                         continue;
 931                 }
 932                 boost::shared_ptr<Processor> instrument = the_instrument ();
 933                 ChanCount in (DataType::MIDI, 1);
 934                 ChanCount out (DataType::AUDIO, 2); // XXX route's out?!
 935
 936                 PluginSetupOptions flags = None;
 937                 if (instrument) {
 938                         flags |= CanReplace;
 939                         in = instrument->input_streams ();
 940                         out = instrument->output_streams ();
 941                 }
 942                 if (pi->has_output_presets (in, out)) {
 943                         flags |= MultiOut;
 944                 }
 945
 946                 pi->set_strict_io (_strict_io);
 947
 948                 PluginSetupOptions mask = None;
 949                 if (Config->get_ask_replace_instrument ()) {
 950                         mask |= CanReplace;
 951                 }
 952                 if (Config->get_ask_setup_instrument ()) {
 953                         mask |= MultiOut;
 954                 }
 955
 956                 flags &= mask;
 957
 958                 if (flags != None) {
 959                         boost::optional<int> rv = PluginSetup (shared_from_this (), pi, flags);  /* EMIT SIGNAL */
 960                         switch (rv.get_value_or (0)) {
 961                                 case 1:
 962                                         to_skip.push_back (*i); // don't add this one;
 963                                         break;
 964                                 case 2:
 965                                         replace_processor (instrument, *i, err);
 966                                         to_skip.push_back (*i);
 967                                         break;
 968                                 default:
 969                                         break;
 970                         }
 971                 }
 972         }
 973
 974         {
 975                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
 976                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
 977                 ProcessorState pstate (this);
 978
 979                 for (ProcessorList::const_iterator i = others.begin(); i != others.end(); ++i) {
 980
 981                         if (*i == _meter) {
 982                                 continue;
 983                         }
 984                         ProcessorList::iterator check = find (to_skip.begin(), to_skip.end(), *i);
 985                         if (check != to_skip.end()) {
 986                                 continue;
 987                         }
 988
 989                         boost::shared_ptr<PluginInsert> pi;
 990
 991                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
 992                                 pi->set_strict_io (_strict_io);
 993                         }
 994
 995                         if (*i == _amp) {
 996                                 /* Ensure that only one amp is in the list at any time */
 997                                 ProcessorList::iterator check = find (_processors.begin(), _processors.end(), *i);
 998                                 if (check != _processors.end()) {
 999                                         if (before == _amp) {
1000                                                 /* Already in position; all is well */
1001                                                 continue;
1002                                         } else {
1003                                                 _processors.erase (check);
1004                                         }
1005                                 }
1006                         }
1007
1008                         assert (find (_processors.begin(), _processors.end(), *i) == _processors.end ());
1009
1010                         _processors.insert (loc, *i);
1011                         (*i)->set_owner (this);
1012
1013                         {
1014                                 if (configure_processors_unlocked (err, &lm)) {
1015                                         pstate.restore ();
1016                                         configure_processors_unlocked (0, &lm); // it worked before we tried to add it ...
1017                                         return -1;
1018                                 }
1019                         }
1020
1021                         if ((*i)->active()) {
1022                                 // why?  emit  ActiveChanged() ??
1023                                 (*i)->activate ();
1024                         }
1025
1026                         (*i)->ActiveChanged.connect_same_thread (*this, boost::bind (&Session::update_latency_compensation, &_session, false));
1027
1028                         boost::shared_ptr<Send> send;
1029                         if ((send = boost::dynamic_pointer_cast<Send> (*i))) {
1030                                 send->SelfDestruct.connect_same_thread (*this,
1031                                                 boost::bind (&Route::processor_selfdestruct, this, boost::weak_ptr<Processor> (*i)));
1032                         }
1033                 }
1034
1035                 for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
1036                         boost::shared_ptr<PluginInsert> pi;
1037
1038                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1039                                 if (pi->has_no_inputs ()) {
1040                                         _have_internal_generator = true;
1041                                         break;
1042                                 }
1043                         }
1044                 }
1045
1046                 _output->set_user_latency (0);
1047         }
1048
1049         reset_instrument_info ();
1050         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1051         set_processor_positions ();
1052
1053         return 0;
1054 }
1055
1056 void
1057 Route::placement_range(Placement p, ProcessorList::iterator& start, ProcessorList::iterator& end)
1058 {
1059         if (p == PreFader) {
1060                 start = _processors.begin();
1061                 end = find(_processors.begin(), _processors.end(), _amp);
1062         } else {
1063                 start = find(_processors.begin(), _processors.end(), _amp);
1064                 ++start;
1065                 end = _processors.end();
1066         }
1067 }
1068
1069 /** Turn off all processors with a given placement
1070  * @param p Placement of processors to disable
1071  */
1072 void
1073 Route::disable_processors (Placement p)
1074 {
1075         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1076
1077         ProcessorList::iterator start, end;
1078         placement_range(p, start, end);
1079
1080         for (ProcessorList::iterator i = start; i != end; ++i) {
1081                 (*i)->enable (false);
1082         }
1083
1084         _session.set_dirty ();
1085 }
1086
1087 /** Turn off all redirects
1088  */
1089 void
1090 Route::disable_processors ()
1091 {
1092         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1093
1094         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1095                 (*i)->enable (false);
1096         }
1097
1098         _session.set_dirty ();
1099 }
1100
1101 /** Turn off all redirects with a given placement
1102  * @param p Placement of redirects to disable
1103  */
1104 void
1105 Route::disable_plugins (Placement p)
1106 {
1107         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1108
1109         ProcessorList::iterator start, end;
1110         placement_range(p, start, end);
1111
1112         for (ProcessorList::iterator i = start; i != end; ++i) {
1113                 if (boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1114                         (*i)->enable (false);
1115                 }
1116         }
1117
1118         _session.set_dirty ();
1119 }
1120
1121 /** Turn off all plugins
1122  */
1123 void
1124 Route::disable_plugins ()
1125 {
1126         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1127
1128         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1129                 if (boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1130                         (*i)->enable (false);
1131                 }
1132         }
1133
1134         _session.set_dirty ();
1135 }
1136
1137
1138 void
1139 Route::ab_plugins (bool forward)
1140 {
1141         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1142
1143         if (forward) {
1144
1145                 /* forward = turn off all active redirects, and mark them so that the next time
1146                    we go the other way, we will revert them
1147                 */
1148
1149                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1150                         if (!boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1151                                 continue;
1152                         }
1153
1154                         if ((*i)->enabled ()) {
1155                                 (*i)->enable (false);
1156                                 (*i)->set_next_ab_is_active (true);
1157                         } else {
1158                                 (*i)->set_next_ab_is_active (false);
1159                         }
1160                 }
1161
1162         } else {
1163
1164                 /* backward = if the redirect was marked to go active on the next ab, do so */
1165
1166                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1167
1168                         if (!boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1169                                 continue;
1170                         }
1171
1172                         (*i)->enable ((*i)->get_next_ab_is_active ());
1173                 }
1174         }
1175
1176         _session.set_dirty ();
1177 }
1178
1179
1180 /** Remove processors with a given placement.
1181  * @param p Placement of processors to remove.
1182  */
1183 void
1184 Route::clear_processors (Placement p)
1185 {
1186         if (!_session.engine().connected()) {
1187                 return;
1188         }
1189
1190         bool already_deleting = _session.deletion_in_progress();
1191         if (!already_deleting) {
1192                 _session.set_deletion_in_progress();
1193         }
1194
1195         {
1196                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
1197                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1198                 ProcessorList new_list;
1199                 ProcessorStreams err;
1200                 bool seen_amp = false;
1201
1202                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1203
1204                         if (*i == _amp) {
1205                                 seen_amp = true;
1206                         }
1207
1208                         if ((*i) == _amp || (*i) == _meter || (*i) == _main_outs || (*i) == _delayline || (*i) == _trim) {
1209
1210                                 /* you can't remove these */
1211
1212                                 new_list.push_back (*i);
1213
1214                         } else {
1215                                 if (seen_amp) {
1216
1217                                         switch (p) {
1218                                         case PreFader:
1219                                                 new_list.push_back (*i);
1220                                                 break;
1221                                         case PostFader:
1222                                                 (*i)->drop_references ();
1223                                                 break;
1224                                         }
1225
1226                                 } else {
1227
1228                                         switch (p) {
1229                                         case PreFader:
1230                                                 (*i)->drop_references ();
1231                                                 break;
1232                                         case PostFader:
1233                                                 new_list.push_back (*i);
1234                                                 break;
1235                                         }
1236                                 }
1237                         }
1238                 }
1239
1240                 _processors = new_list;
1241                 configure_processors_unlocked (&err, &lm); // this can't fail
1242         }
1243
1244         processor_max_streams.reset();
1245         _have_internal_generator = false;
1246         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1247         set_processor_positions ();
1248
1249         reset_instrument_info ();
1250
1251         if (!already_deleting) {
1252                 _session.clear_deletion_in_progress();
1253         }
1254 }
1255
1256 int
1257 Route::remove_processor (boost::shared_ptr<Processor> processor, ProcessorStreams* err, bool need_process_lock)
1258 {
1259         // TODO once the export point can be configured properly, do something smarter here
1260         if (processor == _capturing_processor) {
1261                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock (), Glib::Threads::NOT_LOCK);
1262                 if (need_process_lock) {
1263                         lx.acquire();
1264                 }
1265
1266                 _capturing_processor.reset();
1267
1268                 if (need_process_lock) {
1269                         lx.release();
1270                 }
1271         }
1272
1273         /* these can never be removed */
1274
1275         if (processor == _amp || processor == _meter || processor == _main_outs || processor == _delayline || processor == _trim) {
1276                 return 0;
1277         }
1278
1279         if (!_session.engine().connected()) {
1280                 return 1;
1281         }
1282
1283         processor_max_streams.reset();
1284
1285         {
1286                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock (), Glib::Threads::NOT_LOCK);
1287                 if (need_process_lock) {
1288                         lx.acquire();
1289                 }
1290
1291                 /* Caller must hold process lock */
1292                 assert (!AudioEngine::instance()->process_lock().trylock());
1293
1294                 Glib::Threads::RWLock::WriterLock lm (_processor_lock); // XXX deadlock after export
1295
1296                 ProcessorState pstate (this);
1297
1298                 ProcessorList::iterator i;
1299                 bool removed = false;
1300
1301                 for (i = _processors.begin(); i != _processors.end(); ) {
1302                         if (*i == processor) {
1303
1304                                 /* move along, see failure case for configure_processors()
1305                                    where we may need to reconfigure the processor.
1306                                 */
1307
1308                                 /* stop redirects that send signals to JACK ports
1309                                    from causing noise as a result of no longer being
1310                                    run.
1311                                 */
1312
1313                                 boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor> (*i);
1314                                 boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(*i);
1315
1316                                 if (pi != 0) {
1317                                         assert (iop == 0);
1318                                         iop = pi->sidechain();
1319                                 }
1320
1321                                 if (iop != 0) {
1322                                         iop->disconnect ();
1323                                 }
1324
1325                                 i = _processors.erase (i);
1326                                 removed = true;
1327                                 break;
1328
1329                         } else {
1330                                 ++i;
1331                         }
1332
1333                         _output->set_user_latency (0);
1334                 }
1335
1336                 if (!removed) {
1337                         /* what? */
1338                         return 1;
1339                 }
1340
1341                 if (configure_processors_unlocked (err, &lm)) {
1342                         pstate.restore ();
1343                         /* we know this will work, because it worked before :) */
1344                         configure_processors_unlocked (0, &lm);
1345                         return -1;
1346                 }
1347
1348                 _have_internal_generator = false;
1349
1350                 for (i = _processors.begin(); i != _processors.end(); ++i) {
1351                         boost::shared_ptr<PluginInsert> pi;
1352
1353                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1354                                 if (pi->has_no_inputs ()) {
1355                                         _have_internal_generator = true;
1356                                         break;
1357                                 }
1358                         }
1359                 }
1360                 if (need_process_lock) {
1361                         lx.release();
1362                 }
1363         }
1364
1365         reset_instrument_info ();
1366         processor->drop_references ();
1367         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1368         set_processor_positions ();
1369
1370         return 0;
1371 }
1372
1373 int
1374 Route::replace_processor (boost::shared_ptr<Processor> old, boost::shared_ptr<Processor> sub, ProcessorStreams* err)
1375 {
1376         /* these can never be removed */
1377         if (old == _amp || old == _meter || old == _main_outs || old == _delayline || old == _trim) {
1378                 return 1;
1379         }
1380         /* and can't be used as substitute, either */
1381         if (sub == _amp || sub == _meter || sub == _main_outs || sub == _delayline || sub == _trim) {
1382                 return 1;
1383         }
1384
1385         /* I/Os are out, too */
1386         if (boost::dynamic_pointer_cast<IOProcessor> (old) || boost::dynamic_pointer_cast<IOProcessor> (sub)) {
1387                 return 1;
1388         }
1389
1390         /* this function cannot be used to swap/reorder processors */
1391         if (find (_processors.begin(), _processors.end(), sub) != _processors.end ()) {
1392                 return 1;
1393         }
1394
1395         if (!AudioEngine::instance()->connected() || !old || !sub) {
1396                 return 1;
1397         }
1398
1399         /* ensure that sub is not owned by another route */
1400         if (sub->owner ()) {
1401                 return 1;
1402         }
1403
1404         {
1405                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
1406                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1407                 ProcessorState pstate (this);
1408
1409                 assert (find (_processors.begin(), _processors.end(), sub) == _processors.end ());
1410
1411                 ProcessorList::iterator i;
1412                 bool replaced = false;
1413                 bool enable = old->enabled ();
1414
1415                 for (i = _processors.begin(); i != _processors.end(); ) {
1416                         if (*i == old) {
1417                                 i = _processors.erase (i);
1418                                 _processors.insert (i, sub);
1419                                 sub->set_owner (this);
1420                                 replaced = true;
1421                                 break;
1422                         } else {
1423                                 ++i;
1424                         }
1425                 }
1426
1427                 if (!replaced) {
1428                         return 1;
1429                 }
1430
1431                 if (_strict_io) {
1432                         boost::shared_ptr<PluginInsert> pi;
1433                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(sub)) != 0) {
1434                                 pi->set_strict_io (true);
1435                         }
1436                 }
1437
1438                 if (configure_processors_unlocked (err, &lm)) {
1439                         pstate.restore ();
1440                         configure_processors_unlocked (0, &lm);
1441                         return -1;
1442                 }
1443
1444                 _have_internal_generator = false;
1445
1446                 for (i = _processors.begin(); i != _processors.end(); ++i) {
1447                         boost::shared_ptr<PluginInsert> pi;
1448                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1449                                 if (pi->has_no_inputs ()) {
1450                                         _have_internal_generator = true;
1451                                         break;
1452                                 }
1453                         }
1454                 }
1455
1456                 if (enable) {
1457                         sub->enable (true);
1458                 }
1459
1460                 sub->ActiveChanged.connect_same_thread (*this, boost::bind (&Session::update_latency_compensation, &_session, false));
1461                 _output->set_user_latency (0);
1462         }
1463
1464         reset_instrument_info ();
1465         old->drop_references ();
1466         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1467         set_processor_positions ();
1468         return 0;
1469 }
1470
1471 int
1472 Route::remove_processors (const ProcessorList& to_be_deleted, ProcessorStreams* err)
1473 {
1474         ProcessorList deleted;
1475
1476         if (!_session.engine().connected()) {
1477                 return 1;
1478         }
1479
1480         processor_max_streams.reset();
1481
1482         {
1483                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
1484                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1485                 ProcessorState pstate (this);
1486
1487                 ProcessorList::iterator i;
1488                 boost::shared_ptr<Processor> processor;
1489
1490                 for (i = _processors.begin(); i != _processors.end(); ) {
1491
1492                         processor = *i;
1493
1494                         /* these can never be removed */
1495
1496                         if (processor == _amp || processor == _meter || processor == _main_outs || processor == _delayline || processor == _trim) {
1497                                 ++i;
1498                                 continue;
1499                         }
1500
1501                         /* see if its in the list of processors to delete */
1502
1503                         if (find (to_be_deleted.begin(), to_be_deleted.end(), processor) == to_be_deleted.end()) {
1504                                 ++i;
1505                                 continue;
1506                         }
1507
1508                         /* stop IOProcessors that send to JACK ports
1509                            from causing noise as a result of no longer being
1510                            run.
1511                         */
1512
1513                         boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor>(processor);
1514                         boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(processor);
1515                         if (pi != 0) {
1516                                 assert (iop == 0);
1517                                 iop = pi->sidechain();
1518                         }
1519
1520                         if (iop != 0) {
1521                                 iop->disconnect ();
1522                         }
1523
1524                         deleted.push_back (processor);
1525                         i = _processors.erase (i);
1526                 }
1527
1528                 if (deleted.empty()) {
1529                         /* none of those in the requested list were found */
1530                         return 0;
1531                 }
1532
1533                 _output->set_user_latency (0);
1534
1535                 if (configure_processors_unlocked (err, &lm)) {
1536                         pstate.restore ();
1537                         /* we know this will work, because it worked before :) */
1538                         configure_processors_unlocked (0, &lm);
1539                         return -1;
1540                 }
1541                 //lx.unlock();
1542
1543                 _have_internal_generator = false;
1544
1545                 for (i = _processors.begin(); i != _processors.end(); ++i) {
1546                         boost::shared_ptr<PluginInsert> pi;
1547
1548                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1549                                 if (pi->has_no_inputs ()) {
1550                                         _have_internal_generator = true;
1551                                         break;
1552                                 }
1553                         }
1554                 }
1555         }
1556
1557         /* now try to do what we need to so that those that were removed will be deleted */
1558
1559         for (ProcessorList::iterator i = deleted.begin(); i != deleted.end(); ++i) {
1560                 (*i)->drop_references ();
1561         }
1562
1563         reset_instrument_info ();
1564         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1565         set_processor_positions ();
1566
1567         return 0;
1568 }
1569
1570 void
1571 Route::reset_instrument_info ()
1572 {
1573         boost::shared_ptr<Processor> instr = the_instrument();
1574         if (instr) {
1575                 _instrument_info.set_internal_instrument (instr);
1576         }
1577 }
1578
1579 /** Caller must hold process lock */
1580 int
1581 Route::configure_processors (ProcessorStreams* err)
1582 {
1583 #ifndef PLATFORM_WINDOWS
1584         assert (!AudioEngine::instance()->process_lock().trylock());
1585 #endif
1586
1587         if (!_in_configure_processors) {
1588                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1589                 return configure_processors_unlocked (err, &lm);
1590         }
1591
1592         return 0;
1593 }
1594
1595 ChanCount
1596 Route::input_streams () const
1597 {
1598         return _input->n_ports ();
1599 }
1600
1601 list<pair<ChanCount, ChanCount> >
1602 Route::try_configure_processors (ChanCount in, ProcessorStreams* err)
1603 {
1604         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1605
1606         return try_configure_processors_unlocked (in, err);
1607 }
1608
1609 list<pair<ChanCount, ChanCount> >
1610 Route::try_configure_processors_unlocked (ChanCount in, ProcessorStreams* err)
1611 {
1612         // Check each processor in order to see if we can configure as requested
1613         ChanCount out;
1614         list<pair<ChanCount, ChanCount> > configuration;
1615         uint32_t index = 0;
1616
1617         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: configure processors\n", _name));
1618         DEBUG_TRACE (DEBUG::Processors, "{\n");
1619
1620         for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p, ++index) {
1621
1622                 if ((*p)->can_support_io_configuration(in, out)) {
1623
1624                         if (boost::dynamic_pointer_cast<Delivery> (*p)
1625                                         && boost::dynamic_pointer_cast<Delivery> (*p)->role() == Delivery::Main
1626                                         && !is_auditioner()
1627                                         && (is_monitor() || _strict_io || Profile->get_mixbus ())) {
1628                                 /* with strict I/O the panner + output are forced to
1629                                  * follow the last processor's output.
1630                                  *
1631                                  * Delivery::can_support_io_configuration() will only add ports,
1632                                  * but not remove excess ports.
1633                                  *
1634                                  * This works because the delivery only requires
1635                                  * as many outputs as there are inputs.
1636                                  * Delivery::configure_io() will do the actual removal
1637                                  * by calling _output->ensure_io()
1638                                  */
1639                                 if (!is_master() && _session.master_out () && in.n_audio() > 0) {
1640                                         /* ..but at least as many as there are master-inputs, if
1641                                          * the delivery is dealing with audio */
1642                                         // XXX this may need special-casing for mixbus (master-outputs)
1643                                         // and should maybe be a preference anyway ?!
1644                                         out = ChanCount::max (in, _session.master_out ()->n_inputs ());
1645                                 } else {
1646                                         out = in;
1647                                 }
1648                         }
1649
1650                         DEBUG_TRACE (DEBUG::Processors, string_compose ("\t%1 ID=%2 in=%3 out=%4\n",(*p)->name(), (*p)->id(), in, out));
1651                         configuration.push_back(make_pair(in, out));
1652
1653                         if (is_monitor()) {
1654                                 // restriction for Monitor Section Processors
1655                                 if (in.n_audio() != out.n_audio() || out.n_midi() > 0) {
1656                                         /* do not allow to add/remove channels (for now)
1657                                          * The Monitor follows the master-bus and has no panner (unpan)
1658                                          * but do allow processors with midi-in to be added (e.g VSTs with control that
1659                                          * will remain unconnected)
1660                                          */
1661                                         DEBUG_TRACE (DEBUG::Processors, "Monitor: Channel configuration not allowed.\n");
1662                                         return list<pair<ChanCount, ChanCount> > ();
1663                                 }
1664                                 if (boost::dynamic_pointer_cast<InternalSend> (*p)) {
1665                                         // internal sends make no sense, only feedback
1666                                         DEBUG_TRACE (DEBUG::Processors, "Monitor: No Sends allowed.\n");
1667                                         return list<pair<ChanCount, ChanCount> > ();
1668                                 }
1669                                 if (boost::dynamic_pointer_cast<PortInsert> (*p)) {
1670                                         /* External Sends can be problematic. one can add/remove ports
1671                                          * there signal leaves the DAW to external monitors anyway, so there's
1672                                          * no real use for allowing them here anyway.
1673                                          */
1674                                         DEBUG_TRACE (DEBUG::Processors, "Monitor: No External Sends allowed.\n");
1675                                         return list<pair<ChanCount, ChanCount> > ();
1676                                 }
1677                                 if (boost::dynamic_pointer_cast<Send> (*p)) {
1678                                         // ditto
1679                                         DEBUG_TRACE (DEBUG::Processors, "Monitor: No Sends allowed.\n");
1680                                         return list<pair<ChanCount, ChanCount> > ();
1681                                 }
1682                         }
1683                         in = out;
1684                 } else {
1685                         if (err) {
1686                                 err->index = index;
1687                                 err->count = in;
1688                         }
1689                         DEBUG_TRACE (DEBUG::Processors, "---- CONFIGURATION FAILED.\n");
1690                         DEBUG_TRACE (DEBUG::Processors, string_compose ("---- %1 cannot support in=%2 out=%3\n", (*p)->name(), in, out));
1691                         DEBUG_TRACE (DEBUG::Processors, "}\n");
1692                         return list<pair<ChanCount, ChanCount> > ();
1693                 }
1694         }
1695
1696         DEBUG_TRACE (DEBUG::Processors, "}\n");
1697
1698         return configuration;
1699 }
1700
1701 /** Set the input/output configuration of each processor in the processors list.
1702  *  Caller must hold process lock.
1703  *  Return 0 on success, otherwise configuration is impossible.
1704  */
1705 int
1706 Route::configure_processors_unlocked (ProcessorStreams* err, Glib::Threads::RWLock::WriterLock* lm)
1707 {
1708 #ifndef PLATFORM_WINDOWS
1709         assert (!AudioEngine::instance()->process_lock().trylock());
1710 #endif
1711
1712         if (_in_configure_processors) {
1713                 return 0;
1714         }
1715
1716         /* put invisible processors where they should be */
1717         setup_invisible_processors ();
1718
1719         _in_configure_processors = true;
1720
1721         list<pair<ChanCount, ChanCount> > configuration = try_configure_processors_unlocked (input_streams (), err);
1722
1723         if (configuration.empty ()) {
1724                 _in_configure_processors = false;
1725                 return -1;
1726         }
1727
1728         ChanCount out;
1729         bool seen_mains_out = false;
1730         processor_out_streams = _input->n_ports();
1731         processor_max_streams.reset();
1732
1733         /* processor configure_io() may result in adding ports
1734          * e.g. Delivery::configure_io -> ARDOUR::IO::ensure_io ()
1735          *
1736          * with jack2 adding ports results in a graph-order callback,
1737          * which calls Session::resort_routes() and eventually
1738          * Route::direct_feeds_according_to_reality()
1739          * which takes a ReaderLock (_processor_lock).
1740          *
1741          * so we can't hold a WriterLock here until jack2 threading
1742          * is fixed.
1743          *
1744          * NB. we still hold the process lock
1745          *
1746          * (ardour's own engines do call graph-order from the
1747          * process-thread and hence do not have this issue; besides
1748          * merely adding ports won't trigger a graph-order, only
1749          * making connections does)
1750          */
1751         lm->release ();
1752
1753         // TODO check for a potential ReaderLock after ReaderLock ??
1754         Glib::Threads::RWLock::ReaderLock lr (_processor_lock);
1755
1756         list< pair<ChanCount,ChanCount> >::iterator c = configuration.begin();
1757         for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p, ++c) {
1758
1759                 if (!(*p)->configure_io(c->first, c->second)) {
1760                         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: configuration failed\n", _name));
1761                         _in_configure_processors = false;
1762                         lr.release ();
1763                         lm->acquire ();
1764                         return -1;
1765                 }
1766                 processor_max_streams = ChanCount::max(processor_max_streams, c->first);
1767                 processor_max_streams = ChanCount::max(processor_max_streams, c->second);
1768
1769                 boost::shared_ptr<IOProcessor> iop;
1770                 boost::shared_ptr<PluginInsert> pi;
1771                 if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*p)) != 0) {
1772                         /* plugins connected via Split or Hide Match may have more channels.
1773                          * route/scratch buffers are needed for all of them
1774                          * The configuration may only be a subset (both input and output)
1775                          */
1776                         processor_max_streams = ChanCount::max(processor_max_streams, pi->required_buffers());
1777                 }
1778                 else if ((iop = boost::dynamic_pointer_cast<IOProcessor>(*p)) != 0) {
1779                         processor_max_streams = ChanCount::max(processor_max_streams, iop->natural_input_streams());
1780                         processor_max_streams = ChanCount::max(processor_max_streams, iop->natural_output_streams());
1781                 }
1782                 out = c->second;
1783
1784                 if (boost::dynamic_pointer_cast<Delivery> (*p)
1785                                 && boost::dynamic_pointer_cast<Delivery> (*p)->role() == Delivery::Main) {
1786                         /* main delivery will increase port count to match input.
1787                          * the Delivery::Main is usually the last processor - followed only by
1788                          * 'MeterOutput'.
1789                          */
1790                         seen_mains_out = true;
1791                 }
1792                 if (!seen_mains_out) {
1793                         processor_out_streams = out;
1794                 }
1795         }
1796
1797         lr.release ();
1798         lm->acquire ();
1799
1800
1801         if (_meter) {
1802                 _meter->set_max_channels (processor_max_streams);
1803         }
1804
1805         /* make sure we have sufficient scratch buffers to cope with the new processor
1806            configuration
1807         */
1808         _session.ensure_buffers (n_process_buffers ());
1809
1810         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: configuration complete\n", _name));
1811
1812         _in_configure_processors = false;
1813         return 0;
1814 }
1815
1816 /** Set all visible processors to a given active state (except Fader, whose state is not changed)
1817  *  @param state New active state for those processors.
1818  */
1819 void
1820 Route::all_visible_processors_active (bool state)
1821 {
1822         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1823
1824         if (_processors.empty()) {
1825                 return;
1826         }
1827
1828         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1829                 if (!(*i)->display_to_user() || boost::dynamic_pointer_cast<Amp> (*i)) {
1830                         continue;
1831                 }
1832                 (*i)->enable (state);
1833         }
1834
1835         _session.set_dirty ();
1836 }
1837
1838 bool
1839 Route::processors_reorder_needs_configure (const ProcessorList& new_order)
1840 {
1841         /* check if re-order requires re-configuration of any processors
1842          * -> compare channel configuration for all processors
1843          */
1844         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1845         ChanCount c = input_streams ();
1846
1847         for (ProcessorList::const_iterator j = new_order.begin(); j != new_order.end(); ++j) {
1848                 bool found = false;
1849                 if (c != (*j)->input_streams()) {
1850                         return true;
1851                 }
1852                 for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
1853                         if (*i == *j) {
1854                                 found = true;
1855                                 if ((*i)->input_streams() != c) {
1856                                         return true;
1857                                 }
1858                                 c = (*i)->output_streams();
1859                                 break;
1860                         }
1861                 }
1862                 if (!found) {
1863                         return true;
1864                 }
1865         }
1866         return false;
1867 }
1868
1869 #ifdef __clang__
1870 __attribute__((annotate("realtime")))
1871 #endif
1872 void
1873 Route::apply_processor_order (const ProcessorList& new_order)
1874 {
1875         /* need to hold processor_lock; either read or write lock
1876          * and the engine process_lock.
1877          * Due to r/w lock ambiguity we can only assert the latter
1878          */
1879         assert (!AudioEngine::instance()->process_lock().trylock());
1880
1881
1882         /* "new_order" is an ordered list of processors to be positioned according to "placement".
1883          * NOTE: all processors in "new_order" MUST be marked as display_to_user(). There maybe additional
1884          * processors in the current actual processor list that are hidden. Any visible processors
1885          *  in the current list but not in "new_order" will be assumed to be deleted.
1886          */
1887
1888         /* "as_it_will_be" and "_processors" are lists of shared pointers.
1889          * actual memory usage is small, but insert/erase is not actually rt-safe :(
1890          * (note though that  ::processors_reorder_needs_configure() ensured that
1891          * this function will only ever be called from the rt-thread if no processor were removed)
1892          *
1893          * either way, I can't proove it, but an x-run due to re-order here is less likley
1894          * than an x-run-less 'ardour-silent cycle' both of which effectively "click".
1895          */
1896
1897         ProcessorList as_it_will_be;
1898         ProcessorList::iterator oiter;
1899         ProcessorList::const_iterator niter;
1900
1901         oiter = _processors.begin();
1902         niter = new_order.begin();
1903
1904         while (niter !=  new_order.end()) {
1905
1906                 /* if the next processor in the old list is invisible (i.e. should not be in the new order)
1907                    then append it to the temp list.
1908
1909                    Otherwise, see if the next processor in the old list is in the new list. if not,
1910                    its been deleted. If its there, append it to the temp list.
1911                    */
1912
1913                 if (oiter == _processors.end()) {
1914
1915                         /* no more elements in the old list, so just stick the rest of
1916                            the new order onto the temp list.
1917                            */
1918
1919                         as_it_will_be.insert (as_it_will_be.end(), niter, new_order.end());
1920                         while (niter != new_order.end()) {
1921                                 ++niter;
1922                         }
1923                         break;
1924
1925                 } else {
1926
1927                         if (!(*oiter)->display_to_user()) {
1928
1929                                 as_it_will_be.push_back (*oiter);
1930
1931                         } else {
1932
1933                                 /* visible processor: check that its in the new order */
1934
1935                                 if (find (new_order.begin(), new_order.end(), (*oiter)) == new_order.end()) {
1936                                         /* deleted: do nothing, shared_ptr<> will clean up */
1937                                 } else {
1938                                         /* ignore this one, and add the next item from the new order instead */
1939                                         as_it_will_be.push_back (*niter);
1940                                         ++niter;
1941                                 }
1942                         }
1943
1944                         /* now remove from old order - its taken care of no matter what */
1945                         oiter = _processors.erase (oiter);
1946                 }
1947
1948         }
1949         _processors.insert (oiter, as_it_will_be.begin(), as_it_will_be.end());
1950
1951         /* If the meter is in a custom position, find it and make a rough note of its position */
1952         maybe_note_meter_position ();
1953 }
1954
1955 int
1956 Route::reorder_processors (const ProcessorList& new_order, ProcessorStreams* err)
1957 {
1958         // it a change is already queued, wait for it
1959         // (unless engine is stopped. apply immediately and proceed
1960         while (g_atomic_int_get (&_pending_process_reorder)) {
1961                 if (!AudioEngine::instance()->running()) {
1962                         DEBUG_TRACE (DEBUG::Processors, "offline apply queued processor re-order.\n");
1963                         Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1964
1965                         apply_processor_order(_pending_processor_order);
1966                         setup_invisible_processors ();
1967
1968                         g_atomic_int_set (&_pending_process_reorder, 0);
1969
1970                         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1971                         set_processor_positions ();
1972                 } else {
1973                         // TODO rather use a semaphore or something.
1974                         // but since ::reorder_processors() is called
1975                         // from the GUI thread, this is fine..
1976                         Glib::usleep(500);
1977                 }
1978         }
1979
1980         if (processors_reorder_needs_configure (new_order) || !AudioEngine::instance()->running()) {
1981
1982                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
1983                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1984                 ProcessorState pstate (this);
1985
1986                 apply_processor_order (new_order);
1987
1988                 if (configure_processors_unlocked (err, &lm)) {
1989                         pstate.restore ();
1990                         return -1;
1991                 }
1992
1993                 lm.release();
1994                 lx.release();
1995
1996                 processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1997                 set_processor_positions ();
1998
1999         } else {
2000                 DEBUG_TRACE (DEBUG::Processors, "Queue clickless processor re-order.\n");
2001                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2002
2003                 // _pending_processor_order is protected by _processor_lock
2004                 _pending_processor_order = new_order;
2005                 g_atomic_int_set (&_pending_process_reorder, 1);
2006         }
2007
2008         return 0;
2009 }
2010
2011 bool
2012 Route::add_remove_sidechain (boost::shared_ptr<Processor> proc, bool add)
2013 {
2014         boost::shared_ptr<PluginInsert> pi;
2015         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(proc)) == 0) {
2016                 return false;
2017         }
2018
2019         if (pi->has_sidechain () == add) {
2020                 return true; // ?? call failed, but result is as expected.
2021         }
2022
2023         {
2024                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2025                 ProcessorList::iterator i = find (_processors.begin(), _processors.end(), proc);
2026                 if (i == _processors.end ()) {
2027                         return false;
2028                 }
2029         }
2030
2031         {
2032                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ()); // take before Writerlock to avoid deadlock
2033                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
2034                 PBD::Unwinder<bool> uw (_in_sidechain_setup, true);
2035
2036                 lx.release (); // IO::add_port() and ~IO takes process lock  - XXX check if this is safe
2037                 if (add) {
2038                         if (!pi->add_sidechain ()) {
2039                                 return false;
2040                         }
2041                 } else {
2042                         if (!pi->del_sidechain ()) {
2043                                 return false;
2044                         }
2045                 }
2046
2047                 lx.acquire ();
2048                 list<pair<ChanCount, ChanCount> > c = try_configure_processors_unlocked (n_inputs (), 0);
2049                 lx.release ();
2050
2051                 if (c.empty()) {
2052                         if (add) {
2053                                 pi->del_sidechain ();
2054                         } else {
2055                                 pi->add_sidechain ();
2056                                 // TODO restore side-chain's state.
2057                         }
2058                         return false;
2059                 }
2060                 lx.acquire ();
2061                 configure_processors_unlocked (0, &lm);
2062         }
2063
2064         if (pi->has_sidechain ()) {
2065                 pi->sidechain_input ()->changed.connect_same_thread (*this, boost::bind (&Route::sidechain_change_handler, this, _1, _2));
2066         }
2067
2068         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
2069         _session.set_dirty ();
2070         return true;
2071 }
2072
2073 bool
2074 Route::plugin_preset_output (boost::shared_ptr<Processor> proc, ChanCount outs)
2075 {
2076         boost::shared_ptr<PluginInsert> pi;
2077         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(proc)) == 0) {
2078                 return false;
2079         }
2080
2081         {
2082                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2083                 ProcessorList::iterator i = find (_processors.begin(), _processors.end(), proc);
2084                 if (i == _processors.end ()) {
2085                         return false;
2086                 }
2087         }
2088
2089         {
2090                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
2091                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
2092
2093                 const ChanCount& old (pi->preset_out ());
2094                 if (!pi->set_preset_out (outs)) {
2095                         return true; // no change, OK
2096                 }
2097
2098                 list<pair<ChanCount, ChanCount> > c = try_configure_processors_unlocked (n_inputs (), 0);
2099                 if (c.empty()) {
2100                         /* not possible */
2101                         pi->set_preset_out (old);
2102                         return false;
2103                 }
2104                 configure_processors_unlocked (0, &lm);
2105         }
2106
2107         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
2108         _session.set_dirty ();
2109         return true;
2110 }
2111
2112 bool
2113 Route::reset_plugin_insert (boost::shared_ptr<Processor> proc)
2114 {
2115         ChanCount unused;
2116         return customize_plugin_insert (proc, 0, unused, unused);
2117 }
2118
2119 bool
2120 Route::customize_plugin_insert (boost::shared_ptr<Processor> proc, uint32_t count, ChanCount outs, ChanCount sinks)
2121 {
2122         boost::shared_ptr<PluginInsert> pi;
2123         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(proc)) == 0) {
2124                 return false;
2125         }
2126
2127         {
2128                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2129                 ProcessorList::iterator i = find (_processors.begin(), _processors.end(), proc);
2130                 if (i == _processors.end ()) {
2131                         return false;
2132                 }
2133         }
2134
2135         {
2136                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
2137                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
2138
2139                 bool      old_cust  = pi->custom_cfg ();
2140                 uint32_t  old_cnt   = pi->get_count ();
2141                 ChanCount old_chan  = pi->output_streams ();
2142                 ChanCount old_sinks = pi->natural_input_streams ();
2143
2144                 if (count == 0) {
2145                         pi->set_custom_cfg (false);
2146                 } else {
2147                         pi->set_custom_cfg (true);
2148                         pi->set_count (count);
2149                         pi->set_outputs (outs);
2150                         pi->set_sinks (sinks);
2151                 }
2152
2153                 list<pair<ChanCount, ChanCount> > c = try_configure_processors_unlocked (n_inputs (), 0);
2154                 if (c.empty()) {
2155                         /* not possible */
2156
2157                         pi->set_count (old_cnt);
2158                         pi->set_sinks (old_sinks);
2159                         pi->set_outputs (old_chan);
2160                         pi->set_custom_cfg (old_cust);
2161
2162                         return false;
2163                 }
2164                 configure_processors_unlocked (0, &lm);
2165         }
2166
2167         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
2168         _session.set_dirty ();
2169         return true;
2170 }
2171
2172 bool
2173 Route::set_strict_io (const bool enable)
2174 {
2175         Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
2176
2177         if (_strict_io != enable) {
2178                 _strict_io = enable;
2179                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2180                 for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p) {
2181                         boost::shared_ptr<PluginInsert> pi;
2182                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*p)) != 0) {
2183                                 pi->set_strict_io (_strict_io);
2184                         }
2185                 }
2186
2187                 list<pair<ChanCount, ChanCount> > c = try_configure_processors_unlocked (n_inputs (), 0);
2188
2189                 if (c.empty()) {
2190                         // not possible
2191                         _strict_io = !enable; // restore old value
2192                         for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p) {
2193                                 boost::shared_ptr<PluginInsert> pi;
2194                                 if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*p)) != 0) {
2195                                         pi->set_strict_io (_strict_io);
2196                                 }
2197                         }
2198                         return false;
2199                 }
2200                 lm.release ();
2201
2202                 configure_processors (0);
2203                 lx.release ();
2204
2205                 processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
2206                 _session.set_dirty ();
2207         }
2208         return true;
2209 }
2210
2211 XMLNode&
2212 Route::get_state()
2213 {
2214         return state(true);
2215 }
2216
2217 XMLNode&
2218 Route::get_template()
2219 {
2220         return state(false);
2221 }
2222
2223 XMLNode&
2224 Route::state(bool full_state)
2225 {
2226         LocaleGuard lg;
2227         if (!_session._template_state_dir.empty()) {
2228                 assert (!full_state); // only for templates
2229                 foreach_processor (sigc::bind (sigc::mem_fun (*this, &Route::set_plugin_state_dir), _session._template_state_dir));
2230         }
2231
2232         XMLNode *node = new XMLNode("Route");
2233         ProcessorList::iterator i;
2234         char buf[32];
2235
2236         id().print (buf, sizeof (buf));
2237         node->add_property("id", buf);
2238         node->add_property ("name", _name);
2239         node->add_property("default-type", _default_type.to_string());
2240         node->add_property ("strict-io", _strict_io);
2241
2242         node->add_child_nocopy (_presentation_info.get_state());
2243
2244         node->add_property("active", _active?"yes":"no");
2245         string p;
2246         node->add_property("denormal-protection", _denormal_protection?"yes":"no");
2247         node->add_property("meter-point", enum_2_string (_meter_point));
2248
2249         node->add_property("meter-type", enum_2_string (_meter_type));
2250
2251         if (_route_group) {
2252                 node->add_property("route-group", _route_group->name());
2253         }
2254
2255         node->add_child_nocopy (_solo_control->get_state ());
2256         node->add_child_nocopy (_solo_isolate_control->get_state ());
2257         node->add_child_nocopy (_solo_safe_control->get_state ());
2258
2259         node->add_child_nocopy (_input->state (full_state));
2260         node->add_child_nocopy (_output->state (full_state));
2261         node->add_child_nocopy (_mute_master->get_state ());
2262
2263         node->add_child_nocopy (_mute_control->get_state ());
2264         node->add_child_nocopy (_phase_control->get_state ());
2265
2266         if (full_state) {
2267                 node->add_child_nocopy (Automatable::get_automation_xml_state ());
2268         }
2269
2270         if (_comment.length()) {
2271                 XMLNode *cmt = node->add_child ("Comment");
2272                 cmt->add_content (_comment);
2273         }
2274
2275         if (_pannable) {
2276                 node->add_child_nocopy (_pannable->state (full_state));
2277         }
2278
2279         {
2280                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2281                 for (i = _processors.begin(); i != _processors.end(); ++i) {
2282                         if (!full_state) {
2283                                 /* template save: do not include internal sends functioning as
2284                                          aux sends because the chance of the target ID
2285                                          in the session where this template is used
2286                                          is not very likely.
2287
2288                                          similarly, do not save listen sends which connect to
2289                                          the monitor section, because these will always be
2290                                          added if necessary.
2291                                          */
2292                                 boost::shared_ptr<InternalSend> is;
2293
2294                                 if ((is = boost::dynamic_pointer_cast<InternalSend> (*i)) != 0) {
2295                                         if (is->role() == Delivery::Listen) {
2296                                                 continue;
2297                                         }
2298                                 }
2299                         }
2300                         node->add_child_nocopy((*i)->state (full_state));
2301                 }
2302         }
2303
2304         if (_extra_xml) {
2305                 node->add_child_copy (*_extra_xml);
2306         }
2307
2308         if (_custom_meter_position_noted) {
2309                 boost::shared_ptr<Processor> after = _processor_after_last_custom_meter.lock ();
2310                 if (after) {
2311                         after->id().print (buf, sizeof (buf));
2312                         node->add_property (X_("processor-after-last-custom-meter"), buf);
2313                 }
2314         }
2315
2316         if (!_session._template_state_dir.empty()) {
2317                 foreach_processor (sigc::bind (sigc::mem_fun (*this, &Route::set_plugin_state_dir), ""));
2318         }
2319
2320         node->add_child_copy (Slavable::get_state());
2321
2322         return *node;
2323 }
2324
2325 int
2326 Route::set_state (const XMLNode& node, int version)
2327 {
2328         if (version < 3000) {
2329                 return set_state_2X (node, version);
2330         }
2331
2332         XMLNodeList nlist;
2333         XMLNodeConstIterator niter;
2334         XMLNode *child;
2335         XMLProperty const * prop;
2336
2337         if (node.name() != "Route"){
2338                 error << string_compose(_("Bad node sent to Route::set_state() [%1]"), node.name()) << endmsg;
2339                 return -1;
2340         }
2341
2342         if ((prop = node.property (X_("name"))) != 0) {
2343                 Route::set_name (prop->value());
2344         }
2345
2346         set_id (node);
2347         _initial_io_setup = true;
2348
2349         Stripable::set_state (node, version);
2350
2351         if ((prop = node.property (X_("strict-io"))) != 0) {
2352                 _strict_io = string_is_affirmative (prop->value());
2353         }
2354
2355         if (!can_solo()) {
2356                 _mute_master->set_solo_ignore (true);
2357         }
2358
2359         if (is_monitor()) {
2360                 /* monitor bus does not get a panner, but if (re)created
2361                    via XML, it will already have one by the time we
2362                    call ::set_state(). so ... remove it.
2363                 */
2364                 unpan ();
2365         }
2366
2367         /* add all processors (except amp, which is always present) */
2368
2369         nlist = node.children();
2370         XMLNode processor_state (X_("processor_state"));
2371
2372         Stateful::save_extra_xml (node);
2373
2374         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2375
2376                 child = *niter;
2377
2378                 if (child->name() == IO::state_node_name) {
2379                         if ((prop = child->property (X_("direction"))) == 0) {
2380                                 continue;
2381                         }
2382
2383                         if (prop->value() == "Input") {
2384                                 _input->set_state (*child, version);
2385                         } else if (prop->value() == "Output") {
2386                                 _output->set_state (*child, version);
2387                         }
2388
2389                 } else if (child->name() == X_("Processor")) {
2390                         processor_state.add_child_copy (*child);
2391                 } else if (child->name() == X_("Pannable")) {
2392                         if (_pannable) {
2393                                 _pannable->set_state (*child, version);
2394                         } else {
2395                                 warning << string_compose (_("Pannable state found for route (%1) without a panner!"), name()) << endmsg;
2396                         }
2397                 } else if (child->name() == Slavable::xml_node_name) {
2398                         Slavable::set_state (*child, version);
2399                 }
2400         }
2401
2402         if ((prop = node.property (X_("meter-point"))) != 0) {
2403                 MeterPoint mp = MeterPoint (string_2_enum (prop->value (), _meter_point));
2404                 set_meter_point (mp, true);
2405                 if (_meter) {
2406                         _meter->set_display_to_user (_meter_point == MeterCustom);
2407                 }
2408         }
2409
2410         if ((prop = node.property (X_("meter-type"))) != 0) {
2411                 _meter_type = MeterType (string_2_enum (prop->value (), _meter_type));
2412         }
2413
2414         _initial_io_setup = false;
2415
2416         set_processor_state (processor_state);
2417
2418         // this looks up the internal instrument in processors
2419         reset_instrument_info();
2420
2421         if ((prop = node.property (X_("denormal-protection"))) != 0) {
2422                 set_denormal_protection (string_is_affirmative (prop->value()));
2423         }
2424
2425         if ((prop = node.property (X_("active"))) != 0) {
2426                 bool yn = string_is_affirmative (prop->value());
2427                 set_active (yn, this);
2428         }
2429
2430         if ((prop = node.property (X_("processor-after-last-custom-meter"))) != 0) {
2431                 PBD::ID id (prop->value ());
2432                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2433                 ProcessorList::const_iterator i = _processors.begin ();
2434                 while (i != _processors.end() && (*i)->id() != id) {
2435                         ++i;
2436                 }
2437
2438                 if (i != _processors.end ()) {
2439                         _processor_after_last_custom_meter = *i;
2440                         _custom_meter_position_noted = true;
2441                 }
2442         }
2443
2444         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2445                 child = *niter;
2446
2447                 if (child->name() == X_("Comment")) {
2448
2449                         /* XXX this is a terrible API design in libxml++ */
2450
2451                         XMLNode *cmt = *(child->children().begin());
2452                         _comment = cmt->content();
2453
2454                 }  else if (child->name() == Controllable::xml_node_name) {
2455                         if ((prop = child->property (X_("name"))) == 0) {
2456                                 continue;
2457                         }
2458
2459                         if (prop->value() == _gain_control->name()) {
2460                                 _gain_control->set_state (*child, version);
2461                         } else if (prop->value() == _solo_control->name()) {
2462                                 _solo_control->set_state (*child, version);
2463                         } else if (prop->value() == _solo_safe_control->name()) {
2464                                 _solo_safe_control->set_state (*child, version);
2465                         } else if (prop->value() == _solo_isolate_control->name()) {
2466                                 _solo_isolate_control->set_state (*child, version);
2467                         } else if (prop->value() == _solo_control->name()) {
2468                                 _mute_control->set_state (*child, version);
2469                         } else if (prop->value() == _phase_control->name()) {
2470                                 _phase_control->set_state (*child, version);
2471                         }
2472                 } else if (child->name() == MuteMaster::xml_node_name) {
2473                         _mute_master->set_state (*child, version);
2474
2475                 } else if (child->name() == Automatable::xml_node_name) {
2476                         set_automation_xml_state (*child, Evoral::Parameter(NullAutomation));
2477                 }
2478         }
2479
2480         return 0;
2481 }
2482
2483 int
2484 Route::set_state_2X (const XMLNode& node, int version)
2485 {
2486         LocaleGuard lg;
2487         XMLNodeList nlist;
2488         XMLNodeConstIterator niter;
2489         XMLNode *child;
2490         XMLProperty const * prop;
2491
2492         /* 2X things which still remain to be handled:
2493          * default-type
2494          * automation
2495          * controlouts
2496          */
2497
2498         if (node.name() != "Route") {
2499                 error << string_compose(_("Bad node sent to Route::set_state() [%1]"), node.name()) << endmsg;
2500                 return -1;
2501         }
2502
2503         Stripable::set_state (node, version);
2504
2505         if (is_master() || is_monitor() || is_auditioner()) {
2506                 _mute_master->set_solo_ignore (true);
2507         }
2508
2509         if ((prop = node.property (X_("denormal-protection"))) != 0) {
2510                 set_denormal_protection (string_is_affirmative (prop->value()));
2511         }
2512
2513         if ((prop = node.property (X_("muted"))) != 0) {
2514
2515                 bool first = true;
2516                 bool muted = string_is_affirmative (prop->value());
2517
2518                 if (muted) {
2519
2520                         string mute_point;
2521
2522                         if ((prop = node.property (X_("mute-affects-pre-fader"))) != 0) {
2523
2524                                 if (string_is_affirmative (prop->value())){
2525                                         mute_point = mute_point + "PreFader";
2526                                         first = false;
2527                                 }
2528                         }
2529
2530                         if ((prop = node.property (X_("mute-affects-post-fader"))) != 0) {
2531
2532                                 if (string_is_affirmative (prop->value())){
2533
2534                                         if (!first) {
2535                                                 mute_point = mute_point + ",";
2536                                         }
2537
2538                                         mute_point = mute_point + "PostFader";
2539                                         first = false;
2540                                 }
2541                         }
2542
2543                         if ((prop = node.property (X_("mute-affects-control-outs"))) != 0) {
2544
2545                                 if (string_is_affirmative (prop->value())){
2546
2547                                         if (!first) {
2548                                                 mute_point = mute_point + ",";
2549                                         }
2550
2551                                         mute_point = mute_point + "Listen";
2552                                         first = false;
2553                                 }
2554                         }
2555
2556                         if ((prop = node.property (X_("mute-affects-main-outs"))) != 0) {
2557
2558                                 if (string_is_affirmative (prop->value())){
2559
2560                                         if (!first) {
2561                                                 mute_point = mute_point + ",";
2562                                         }
2563
2564                                         mute_point = mute_point + "Main";
2565                                 }
2566                         }
2567
2568                         _mute_master->set_mute_points (mute_point);
2569                         _mute_master->set_muted_by_self (true);
2570                 }
2571         }
2572
2573         if ((prop = node.property (X_("meter-point"))) != 0) {
2574                 _meter_point = MeterPoint (string_2_enum (prop->value (), _meter_point));
2575         }
2576
2577         /* IOs */
2578
2579         nlist = node.children ();
2580         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2581
2582                 child = *niter;
2583
2584                 if (child->name() == IO::state_node_name) {
2585
2586                         /* there is a note in IO::set_state_2X() about why we have to call
2587                            this directly.
2588                            */
2589
2590                         _input->set_state_2X (*child, version, true);
2591                         _output->set_state_2X (*child, version, false);
2592
2593                         if ((prop = child->property (X_("name"))) != 0) {
2594                                 Route::set_name (prop->value ());
2595                         }
2596
2597                         set_id (*child);
2598
2599                         if ((prop = child->property (X_("active"))) != 0) {
2600                                 bool yn = string_is_affirmative (prop->value());
2601                                 _active = !yn; // force switch
2602                                 set_active (yn, this);
2603                         }
2604
2605                         if ((prop = child->property (X_("gain"))) != 0) {
2606                                 gain_t val;
2607
2608                                 if (sscanf (prop->value().c_str(), "%f", &val) == 1) {
2609                                         _amp->gain_control()->set_value (val, Controllable::NoGroup);
2610                                 }
2611                         }
2612
2613                         /* Set up Panners in the IO */
2614                         XMLNodeList io_nlist = child->children ();
2615
2616                         XMLNodeConstIterator io_niter;
2617                         XMLNode *io_child;
2618
2619                         for (io_niter = io_nlist.begin(); io_niter != io_nlist.end(); ++io_niter) {
2620
2621                                 io_child = *io_niter;
2622
2623                                 if (io_child->name() == X_("Panner")) {
2624                                         _main_outs->panner_shell()->set_state(*io_child, version);
2625                                 } else if (io_child->name() == X_("Automation")) {
2626                                         /* IO's automation is for the fader */
2627                                         _amp->set_automation_xml_state (*io_child, Evoral::Parameter (GainAutomation));
2628                                 }
2629                         }
2630                 }
2631         }
2632
2633         XMLNodeList redirect_nodes;
2634
2635         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2636
2637                 child = *niter;
2638
2639                 if (child->name() == X_("Send") || child->name() == X_("Insert")) {
2640                         redirect_nodes.push_back(child);
2641                 }
2642
2643         }
2644
2645         set_processor_state_2X (redirect_nodes, version);
2646
2647         Stateful::save_extra_xml (node);
2648
2649         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2650                 child = *niter;
2651
2652                 if (child->name() == X_("Comment")) {
2653
2654                         /* XXX this is a terrible API design in libxml++ */
2655
2656                         XMLNode *cmt = *(child->children().begin());
2657                         _comment = cmt->content();
2658
2659                 } else if (child->name() == Controllable::xml_node_name && (prop = child->property("name")) != 0) {
2660                         if (prop->value() == X_("solo")) {
2661                                 _solo_control->set_state (*child, version);
2662                         } else if (prop->value() == X_("mute")) {
2663                                 _mute_control->set_state (*child, version);
2664                         }
2665
2666                 }
2667         }
2668
2669         return 0;
2670 }
2671
2672 XMLNode&
2673 Route::get_processor_state ()
2674 {
2675         XMLNode* root = new XMLNode (X_("redirects"));
2676         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
2677                 root->add_child_nocopy ((*i)->state (true));
2678         }
2679
2680         return *root;
2681 }
2682
2683 void
2684 Route::set_processor_state_2X (XMLNodeList const & nList, int version)
2685 {
2686         /* We don't bother removing existing processors not in nList, as this
2687            method will only be called when creating a Route from scratch, not
2688            for undo purposes.  Just put processors in at the appropriate place
2689            in the list.
2690         */
2691
2692         for (XMLNodeConstIterator i = nList.begin(); i != nList.end(); ++i) {
2693                 add_processor_from_xml_2X (**i, version);
2694         }
2695 }
2696
2697 void
2698 Route::set_processor_state (const XMLNode& node)
2699 {
2700         const XMLNodeList &nlist = node.children();
2701         XMLNodeConstIterator niter;
2702         ProcessorList new_order;
2703         bool must_configure = false;
2704
2705         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2706
2707                 XMLProperty* prop = (*niter)->property ("type");
2708
2709                 if (prop->value() == "amp") {
2710                         _amp->set_state (**niter, Stateful::current_state_version);
2711                         new_order.push_back (_amp);
2712                 } else if (prop->value() == "trim") {
2713                         _trim->set_state (**niter, Stateful::current_state_version);
2714                         new_order.push_back (_trim);
2715                 } else if (prop->value() == "meter") {
2716                         _meter->set_state (**niter, Stateful::current_state_version);
2717                         new_order.push_back (_meter);
2718                 } else if (prop->value() == "delay") {
2719                         if (_delayline) {
2720                                 _delayline->set_state (**niter, Stateful::current_state_version);
2721                                 new_order.push_back (_delayline);
2722                         }
2723                 } else if (prop->value() == "main-outs") {
2724                         _main_outs->set_state (**niter, Stateful::current_state_version);
2725                 } else if (prop->value() == "intreturn") {
2726                         if (!_intreturn) {
2727                                 _intreturn.reset (new InternalReturn (_session));
2728                                 must_configure = true;
2729                         }
2730                         _intreturn->set_state (**niter, Stateful::current_state_version);
2731                 } else if (is_monitor() && prop->value() == "monitor") {
2732                         if (!_monitor_control) {
2733                                 _monitor_control.reset (new MonitorProcessor (_session));
2734                                 must_configure = true;
2735                         }
2736                         _monitor_control->set_state (**niter, Stateful::current_state_version);
2737                 } else if (prop->value() == "capture") {
2738                         /* CapturingProcessor should never be restored, it's always
2739                            added explicitly when needed */
2740                 } else {
2741                         ProcessorList::iterator o;
2742
2743                         for (o = _processors.begin(); o != _processors.end(); ++o) {
2744                                 XMLProperty const * id_prop = (*niter)->property(X_("id"));
2745                                 if (id_prop && (*o)->id() == id_prop->value()) {
2746                                         (*o)->set_state (**niter, Stateful::current_state_version);
2747                                         new_order.push_back (*o);
2748                                         break;
2749                                 }
2750                         }
2751
2752                         // If the processor (*niter) is not on the route then create it
2753
2754                         if (o == _processors.end()) {
2755
2756                                 boost::shared_ptr<Processor> processor;
2757
2758                                 if (prop->value() == "intsend") {
2759
2760                                         processor.reset (new InternalSend (_session, _pannable, _mute_master, boost::dynamic_pointer_cast<ARDOUR::Route>(shared_from_this()), boost::shared_ptr<Route>(), Delivery::Aux, true));
2761
2762                                 } else if (prop->value() == "ladspa" || prop->value() == "Ladspa" ||
2763                                            prop->value() == "lv2" ||
2764                                            prop->value() == "windows-vst" ||
2765                                            prop->value() == "lxvst" ||
2766                                            prop->value() == "luaproc" ||
2767                                            prop->value() == "audiounit") {
2768
2769                                         if (_session.get_disable_all_loaded_plugins ()) {
2770                                                 processor.reset (new UnknownProcessor (_session, **niter));
2771                                         } else {
2772                                                 processor.reset (new PluginInsert (_session));
2773                                                 processor->set_owner (this);
2774                                                 if (_strict_io) {
2775                                                         boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(processor);
2776                                                         pi->set_strict_io (true);
2777                                                 }
2778
2779                                         }
2780                                 } else if (prop->value() == "port") {
2781
2782                                         processor.reset (new PortInsert (_session, _pannable, _mute_master));
2783
2784                                 } else if (prop->value() == "send") {
2785
2786                                         processor.reset (new Send (_session, _pannable, _mute_master, Delivery::Send, true));
2787                                         boost::shared_ptr<Send> send = boost::dynamic_pointer_cast<Send> (processor);
2788                                         send->SelfDestruct.connect_same_thread (*this,
2789                                                         boost::bind (&Route::processor_selfdestruct, this, boost::weak_ptr<Processor> (processor)));
2790
2791                                 } else {
2792                                         error << string_compose(_("unknown Processor type \"%1\"; ignored"), prop->value()) << endmsg;
2793                                         continue;
2794                                 }
2795
2796                                 if (processor->set_state (**niter, Stateful::current_state_version) != 0) {
2797                                         /* This processor could not be configured.  Turn it into a UnknownProcessor */
2798                                         processor.reset (new UnknownProcessor (_session, **niter));
2799                                 }
2800
2801                                 /* subscribe to Sidechain IO changes */
2802                                 boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert> (processor);
2803                                 if (pi && pi->has_sidechain ()) {
2804                                         pi->sidechain_input ()->changed.connect_same_thread (*this, boost::bind (&Route::sidechain_change_handler, this, _1, _2));
2805                                 }
2806
2807                                 /* we have to note the monitor send here, otherwise a new one will be created
2808                                    and the state of this one will be lost.
2809                                 */
2810                                 boost::shared_ptr<InternalSend> isend = boost::dynamic_pointer_cast<InternalSend> (processor);
2811                                 if (isend && isend->role() == Delivery::Listen) {
2812                                         _monitor_send = isend;
2813                                 }
2814
2815                                 /* it doesn't matter if invisible processors are added here, as they
2816                                    will be sorted out by setup_invisible_processors () shortly.
2817                                 */
2818
2819                                 new_order.push_back (processor);
2820                                 must_configure = true;
2821                         }
2822                 }
2823         }
2824
2825         {
2826                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
2827                 /* re-assign _processors w/o process-lock.
2828                  * if there's an IO-processor present in _processors but
2829                  * not in new_order, it will be deleted and ~IO takes
2830                  * a process lock.
2831                  */
2832                 _processors = new_order;
2833                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
2834
2835                 if (must_configure) {
2836                         configure_processors_unlocked (0, &lm);
2837                 }
2838
2839                 for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
2840
2841                         (*i)->set_owner (this);
2842                         (*i)->ActiveChanged.connect_same_thread (*this, boost::bind (&Session::update_latency_compensation, &_session, false));
2843
2844                         boost::shared_ptr<PluginInsert> pi;
2845
2846                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
2847                                 if (pi->has_no_inputs ()) {
2848                                         _have_internal_generator = true;
2849                                         break;
2850                                 }
2851                         }
2852                 }
2853         }
2854
2855         reset_instrument_info ();
2856         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
2857         set_processor_positions ();
2858 }
2859
2860 void
2861 Route::curve_reallocate ()
2862 {
2863 //      _gain_automation_curve.finish_resize ();
2864 //      _pan_automation_curve.finish_resize ();
2865 }
2866
2867 void
2868 Route::silence (framecnt_t nframes)
2869 {
2870         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
2871         if (!lm.locked()) {
2872                 return;
2873         }
2874
2875         silence_unlocked (nframes);
2876 }
2877
2878 void
2879 Route::silence_unlocked (framecnt_t nframes)
2880 {
2881         /* Must be called with the processor lock held */
2882
2883         const framepos_t now = _session.transport_frame ();
2884
2885         if (!_silent) {
2886
2887                 _output->silence (nframes);
2888
2889                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
2890                         boost::shared_ptr<PluginInsert> pi;
2891
2892                         if (!_active && (pi = boost::dynamic_pointer_cast<PluginInsert> (*i)) != 0) {
2893                                 // skip plugins, they don't need anything when we're not active
2894                                 continue;
2895                         }
2896
2897                         (*i)->silence (nframes, now);
2898                 }
2899
2900                 if (nframes == _session.get_block_size()) {
2901                         // _silent = true;
2902                 }
2903         }
2904 }
2905
2906 void
2907 Route::add_internal_return ()
2908 {
2909         if (!_intreturn) {
2910                 _intreturn.reset (new InternalReturn (_session));
2911                 add_processor (_intreturn, PreFader);
2912         }
2913 }
2914
2915 void
2916 Route::add_send_to_internal_return (InternalSend* send)
2917 {
2918         Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
2919
2920         for (ProcessorList::const_iterator x = _processors.begin(); x != _processors.end(); ++x) {
2921                 boost::shared_ptr<InternalReturn> d = boost::dynamic_pointer_cast<InternalReturn>(*x);
2922
2923                 if (d) {
2924                         return d->add_send (send);
2925                 }
2926         }
2927 }
2928
2929 void
2930 Route::remove_send_from_internal_return (InternalSend* send)
2931 {
2932         Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
2933
2934         for (ProcessorList::const_iterator x = _processors.begin(); x != _processors.end(); ++x) {
2935                 boost::shared_ptr<InternalReturn> d = boost::dynamic_pointer_cast<InternalReturn>(*x);
2936
2937                 if (d) {
2938                         return d->remove_send (send);
2939                 }
2940         }
2941 }
2942
2943 void
2944 Route::enable_monitor_send ()
2945 {
2946         /* Caller must hold process lock */
2947         assert (!AudioEngine::instance()->process_lock().trylock());
2948
2949         /* master never sends to monitor section via the normal mechanism */
2950         assert (!is_master ());
2951         assert (!is_monitor ());
2952
2953         /* make sure we have one */
2954         if (!_monitor_send) {
2955                 _monitor_send.reset (new InternalSend (_session, _pannable, _mute_master, boost::dynamic_pointer_cast<ARDOUR::Route>(shared_from_this()), _session.monitor_out(), Delivery::Listen));
2956                 _monitor_send->set_display_to_user (false);
2957         }
2958
2959         /* set it up */
2960         configure_processors (0);
2961 }
2962
2963 /** Add an aux send to a route.
2964  *  @param route route to send to.
2965  *  @param before Processor to insert before, or 0 to insert at the end.
2966  */
2967 int
2968 Route::add_aux_send (boost::shared_ptr<Route> route, boost::shared_ptr<Processor> before)
2969 {
2970         assert (route != _session.monitor_out ());
2971
2972         {
2973                 Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
2974
2975                 for (ProcessorList::iterator x = _processors.begin(); x != _processors.end(); ++x) {
2976
2977                         boost::shared_ptr<InternalSend> d = boost::dynamic_pointer_cast<InternalSend> (*x);
2978
2979                         if (d && d->target_route() == route) {
2980                                 /* already listening via the specified IO: do nothing */
2981                                 return 0;
2982                         }
2983                 }
2984         }
2985
2986         try {
2987
2988                 boost::shared_ptr<InternalSend> listener;
2989
2990                 {
2991                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
2992                         boost::shared_ptr<Pannable> sendpan (new Pannable (_session));
2993                         listener.reset (new InternalSend (_session, sendpan, _mute_master, boost::dynamic_pointer_cast<ARDOUR::Route>(shared_from_this()), route, Delivery::Aux));
2994                 }
2995
2996                 add_processor (listener, before);
2997
2998         } catch (failed_constructor& err) {
2999                 return -1;
3000         }
3001
3002         return 0;
3003 }
3004
3005 void
3006 Route::remove_aux_or_listen (boost::shared_ptr<Route> route)
3007 {
3008         ProcessorStreams err;
3009         ProcessorList::iterator tmp;
3010
3011         {
3012                 Glib::Threads::RWLock::ReaderLock rl(_processor_lock);
3013
3014                 /* have to do this early because otherwise processor reconfig
3015                  * will put _monitor_send back in the list
3016                  */
3017
3018                 if (route == _session.monitor_out()) {
3019                         _monitor_send.reset ();
3020                 }
3021
3022           again:
3023                 for (ProcessorList::iterator x = _processors.begin(); x != _processors.end(); ++x) {
3024
3025                         boost::shared_ptr<InternalSend> d = boost::dynamic_pointer_cast<InternalSend>(*x);
3026
3027                         if (d && d->target_route() == route) {
3028                                 rl.release ();
3029                                 if (remove_processor (*x, &err, false) > 0) {
3030                                         rl.acquire ();
3031                                         continue;
3032                                 }
3033                                 rl.acquire ();
3034
3035                                 /* list could have been demolished while we dropped the lock
3036                                    so start over.
3037                                 */
3038                                 if (_session.engine().connected()) {
3039                                         /* i/o processors cannot be removed if the engine is not running
3040                                          * so don't live-loop in case the engine is N/A or dies
3041                                          */
3042                                         goto again;
3043                                 }
3044                         }
3045                 }
3046         }
3047 }
3048
3049 void
3050 Route::set_comment (string cmt, void *src)
3051 {
3052         _comment = cmt;
3053         comment_changed ();
3054         _session.set_dirty ();
3055 }
3056
3057 bool
3058 Route::add_fed_by (boost::shared_ptr<Route> other, bool via_sends_only)
3059 {
3060         FeedRecord fr (other, via_sends_only);
3061
3062         pair<FedBy::iterator,bool> result =  _fed_by.insert (fr);
3063
3064         if (!result.second) {
3065
3066                 /* already a record for "other" - make sure sends-only information is correct */
3067                 if (!via_sends_only && result.first->sends_only) {
3068                         FeedRecord* frp = const_cast<FeedRecord*>(&(*result.first));
3069                         frp->sends_only = false;
3070                 }
3071         }
3072
3073         return result.second;
3074 }
3075
3076 void
3077 Route::clear_fed_by ()
3078 {
3079         _fed_by.clear ();
3080 }
3081
3082 bool
3083 Route::feeds (boost::shared_ptr<Route> other, bool* via_sends_only)
3084 {
3085         const FedBy& fed_by (other->fed_by());
3086
3087         for (FedBy::const_iterator f = fed_by.begin(); f != fed_by.end(); ++f) {
3088                 boost::shared_ptr<Route> sr = f->r.lock();
3089
3090                 if (sr && (sr.get() == this)) {
3091
3092                         if (via_sends_only) {
3093                                 *via_sends_only = f->sends_only;
3094                         }
3095
3096                         return true;
3097                 }
3098         }
3099
3100         return false;
3101 }
3102
3103 IOVector
3104 Route::all_inputs () const
3105 {
3106         /* TODO, if this works as expected,
3107          * cache the IOVector and maintain it via
3108          * input_change_handler(), sidechain_change_handler() etc
3109          */
3110         IOVector ios;
3111         ios.push_back (_input);
3112
3113         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3114         for (ProcessorList::const_iterator r = _processors.begin(); r != _processors.end(); ++r) {
3115
3116                 boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor>(*r);
3117                 boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(*r);
3118                 if (pi != 0) {
3119                         assert (iop == 0);
3120                         iop = pi->sidechain();
3121                 }
3122
3123                 if (iop != 0 && iop->input()) {
3124                         ios.push_back (iop->input());
3125                 }
3126         }
3127         return ios;
3128 }
3129
3130 IOVector
3131 Route::all_outputs () const
3132 {
3133         IOVector ios;
3134         // _output is included via Delivery
3135         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3136         for (ProcessorList::const_iterator r = _processors.begin(); r != _processors.end(); ++r) {
3137                 boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor>(*r);
3138                 if (iop != 0 && iop->output()) {
3139                         ios.push_back (iop->output());
3140                 }
3141         }
3142         return ios;
3143 }
3144
3145 bool
3146 Route::direct_feeds_according_to_reality (boost::shared_ptr<Route> other, bool* via_send_only)
3147 {
3148         DEBUG_TRACE (DEBUG::Graph, string_compose ("Feeds? %1\n", _name));
3149         if (other->all_inputs().fed_by (_output)) {
3150                 DEBUG_TRACE (DEBUG::Graph, string_compose ("\tdirect FEEDS %2\n", other->name()));
3151                 if (via_send_only) {
3152                         *via_send_only = false;
3153                 }
3154
3155                 return true;
3156         }
3157
3158         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3159
3160         for (ProcessorList::iterator r = _processors.begin(); r != _processors.end(); ++r) {
3161
3162                 boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor>(*r);
3163                 boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(*r);
3164                 if (pi != 0) {
3165                         assert (iop == 0);
3166                         iop = pi->sidechain();
3167                 }
3168
3169                 if (iop != 0) {
3170                         boost::shared_ptr<const IO> iop_out = iop->output();
3171                         if (other.get() == this && iop_out && iop->input() && iop_out->connected_to (iop->input())) {
3172                                 // TODO this needs a delaylines in the Insert to align connections (!)
3173                                 DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tIOP %1 does feed its own return (%2)\n", iop->name(), other->name()));
3174                                 continue;
3175                         }
3176                         if ((iop_out && other->all_inputs().fed_by (iop_out)) || iop->feeds (other)) {
3177                                 DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tIOP %1 does feed %2\n", iop->name(), other->name()));
3178                                 if (via_send_only) {
3179                                         *via_send_only = true;
3180                                 }
3181                                 return true;
3182                         } else {
3183                                 DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tIOP %1 does NOT feed %2\n", iop->name(), other->name()));
3184                         }
3185                 } else {
3186                         DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tPROC %1 is not an IOP\n", (*r)->name()));
3187                 }
3188
3189         }
3190
3191         DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tdoes NOT feed %1\n", other->name()));
3192         return false;
3193 }
3194
3195 bool
3196 Route::direct_feeds_according_to_graph (boost::shared_ptr<Route> other, bool* via_send_only)
3197 {
3198         return _session._current_route_graph.has (shared_from_this (), other, via_send_only);
3199 }
3200
3201 bool
3202 Route::feeds_according_to_graph (boost::shared_ptr<Route> other)
3203 {
3204         return _session._current_route_graph.feeds (shared_from_this (), other);
3205 }
3206
3207 /** Called from the (non-realtime) butler thread when the transport is stopped */
3208 void
3209 Route::nonrealtime_handle_transport_stopped (bool /*abort_ignored*/, bool /*did_locate*/, bool can_flush_processors)
3210 {
3211         framepos_t now = _session.transport_frame();
3212
3213         {
3214                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3215
3216                 Automatable::transport_stopped (now);
3217
3218                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3219
3220                         if (!_have_internal_generator && (Config->get_plugins_stop_with_transport() && can_flush_processors)) {
3221                                 (*i)->flush ();
3222                         }
3223
3224                         (*i)->transport_stopped (now);
3225                 }
3226         }
3227
3228         _roll_delay = _initial_delay;
3229 }
3230
3231 void
3232 Route::input_change_handler (IOChange change, void * /*src*/)
3233 {
3234         if ((change.type & IOChange::ConfigurationChanged)) {
3235                 /* This is called with the process lock held if change
3236                    contains ConfigurationChanged
3237                 */
3238                 configure_processors (0);
3239                 _phase_control->resize (_input->n_ports().n_audio ());
3240                 io_changed (); /* EMIT SIGNAL */
3241         }
3242
3243         if (_solo_control->soloed_by_others_upstream() || _solo_isolate_control->solo_isolated_by_upstream()) {
3244                 int sbou = 0;
3245                 int ibou = 0;
3246                 boost::shared_ptr<RouteList> routes = _session.get_routes ();
3247                 if (_input->connected()) {
3248                         for (RouteList::iterator i = routes->begin(); i != routes->end(); ++i) {
3249                                 if ((*i).get() == this || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_auditioner()) {
3250                                         continue;
3251                                 }
3252                                 bool sends_only;
3253                                 bool does_feed = (*i)->direct_feeds_according_to_reality (shared_from_this(), &sends_only);
3254                                 if (does_feed && !sends_only) {
3255                                         if ((*i)->soloed()) {
3256                                                 ++sbou;
3257                                         }
3258                                         if ((*i)->solo_isolate_control()->solo_isolated()) {
3259                                                 ++ibou;
3260                                         }
3261                                 }
3262                         }
3263                 }
3264
3265                 int delta  = sbou - _solo_control->soloed_by_others_upstream();
3266                 int idelta = ibou - _solo_isolate_control->solo_isolated_by_upstream();
3267
3268                 if (idelta < -1) {
3269                         PBD::warning << string_compose (
3270                                         _("Invalid Solo-Isolate propagation: from:%1 new:%2 - old:%3 = delta:%4"),
3271                                         _name, ibou, _solo_isolate_control->solo_isolated_by_upstream(), idelta)
3272                                      << endmsg;
3273
3274                 }
3275
3276                 if (_solo_control->soloed_by_others_upstream()) {
3277                         // ignore new connections (they're not propagated)
3278                         if (delta <= 0) {
3279                                 _solo_control->mod_solo_by_others_upstream (delta);
3280                         }
3281                 }
3282
3283                 if (_solo_isolate_control->solo_isolated_by_upstream()) {
3284                         // solo-isolate currently only propagates downstream
3285                         if (idelta < 0) {
3286                                 _solo_isolate_control->mod_solo_isolated_by_upstream (1);
3287                         }
3288                         //_solo_isolated_by_upstream = ibou;
3289                 }
3290
3291                 // Session::route_solo_changed  does not propagate indirect solo-changes
3292                 // propagate downstream to tracks
3293                 for (RouteList::iterator i = routes->begin(); i != routes->end(); ++i) {
3294                         if ((*i).get() == this || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_auditioner()) {
3295                                 continue;
3296                         }
3297                         bool sends_only;
3298                         bool does_feed = feeds (*i, &sends_only);
3299                         if (delta <= 0 && does_feed && !sends_only) {
3300                                 (*i)->solo_control()->mod_solo_by_others_upstream (delta);
3301                         }
3302
3303                         if (idelta < 0 && does_feed && !sends_only) {
3304                                 (*i)->solo_isolate_control()->mod_solo_isolated_by_upstream (-1);
3305                         }
3306                 }
3307         }
3308 }
3309
3310 void
3311 Route::output_change_handler (IOChange change, void * /*src*/)
3312 {
3313         if (_initial_io_setup) {
3314                 return;
3315         }
3316
3317         if ((change.type & IOChange::ConfigurationChanged)) {
3318                 /* This is called with the process lock held if change
3319                    contains ConfigurationChanged
3320                 */
3321                 configure_processors (0);
3322
3323                 if (is_master()) {
3324                         _session.reset_monitor_section();
3325                 }
3326
3327                 io_changed (); /* EMIT SIGNAL */
3328         }
3329
3330         if (_solo_control->soloed_by_others_downstream()) {
3331                 int sbod = 0;
3332                 /* checking all all downstream routes for
3333                  * explicit of implict solo is a rather drastic measure,
3334                  * ideally the input_change_handler() of the other route
3335                  * would propagate the change to us.
3336                  */
3337                 boost::shared_ptr<RouteList> routes = _session.get_routes ();
3338                 if (_output->connected()) {
3339                         for (RouteList::iterator i = routes->begin(); i != routes->end(); ++i) {
3340                                 if ((*i).get() == this || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_auditioner()) {
3341                                         continue;
3342                                 }
3343                                 bool sends_only;
3344                                 bool does_feed = direct_feeds_according_to_reality (*i, &sends_only);
3345                                 if (does_feed && !sends_only) {
3346                                         if ((*i)->soloed()) {
3347                                                 ++sbod;
3348                                                 break;
3349                                         }
3350                                 }
3351                         }
3352                 }
3353                 int delta = sbod - _solo_control->soloed_by_others_downstream();
3354                 if (delta <= 0) {
3355                         // do not allow new connections to change implicit solo (no propagation)
3356                         _solo_control->mod_solo_by_others_downstream (delta);
3357                         // Session::route_solo_changed() does not propagate indirect solo-changes
3358                         // propagate upstream to tracks
3359                         for (RouteList::iterator i = routes->begin(); i != routes->end(); ++i) {
3360                                 if ((*i).get() == this || !can_solo()) {
3361                                         continue;
3362                                 }
3363                                 bool sends_only;
3364                                 bool does_feed = (*i)->feeds (shared_from_this(), &sends_only);
3365                                 if (delta != 0 && does_feed && !sends_only) {
3366                                         (*i)->solo_control()->mod_solo_by_others_downstream (delta);
3367                                 }
3368                         }
3369
3370                 }
3371         }
3372 }
3373
3374 void
3375 Route::sidechain_change_handler (IOChange change, void* src)
3376 {
3377         if (_initial_io_setup || _in_sidechain_setup) {
3378                 return;
3379         }
3380
3381         input_change_handler (change, src);
3382 }
3383
3384 uint32_t
3385 Route::pans_required () const
3386 {
3387         if (n_outputs().n_audio() < 2) {
3388                 return 0;
3389         }
3390
3391         return max (n_inputs ().n_audio(), processor_max_streams.n_audio());
3392 }
3393
3394 void
3395 Route::flush_processor_buffers_locked (framecnt_t nframes)
3396 {
3397         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3398                 boost::shared_ptr<Delivery> d = boost::dynamic_pointer_cast<Delivery> (*i);
3399                 if (d) {
3400                         d->flush_buffers (nframes);
3401                 } else {
3402                         boost::shared_ptr<PortInsert> p = boost::dynamic_pointer_cast<PortInsert> (*i);
3403                         if (p) {
3404                                 p->flush_buffers (nframes);
3405                         }
3406                 }
3407         }
3408 }
3409
3410 int
3411 Route::no_roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, bool session_state_changing)
3412 {
3413         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
3414
3415         if (!lm.locked()) {
3416                 return 0;
3417         }
3418
3419         if (n_outputs().n_total() == 0) {
3420                 return 0;
3421         }
3422
3423         if (!_active || n_inputs() == ChanCount::ZERO)  {
3424                 silence_unlocked (nframes);
3425                 return 0;
3426         }
3427
3428         if (session_state_changing) {
3429                 if (_session.transport_speed() != 0.0f) {
3430                         /* we're rolling but some state is changing (e.g. our diskstream contents)
3431                            so we cannot use them. Be silent till this is over.
3432
3433                            XXX note the absurdity of ::no_roll() being called when we ARE rolling!
3434                         */
3435                         silence_unlocked (nframes);
3436                         return 0;
3437                 }
3438                 /* we're really not rolling, so we're either delivery silence or actually
3439                    monitoring, both of which are safe to do while session_state_changing is true.
3440                 */
3441         }
3442
3443         BufferSet& bufs = _session.get_route_buffers (n_process_buffers());
3444
3445         fill_buffers_with_input (bufs, _input, nframes);
3446
3447         if (_meter_point == MeterInput) {
3448                 _meter->run (bufs, start_frame, end_frame, 0.0, nframes, true);
3449         }
3450
3451         _amp->apply_gain_automation (false);
3452         _trim->apply_gain_automation (false);
3453         passthru (bufs, start_frame, end_frame, nframes, 0);
3454
3455         flush_processor_buffers_locked (nframes);
3456
3457         return 0;
3458 }
3459
3460 int
3461 Route::roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, int declick, bool& /* need_butler */)
3462 {
3463         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
3464         if (!lm.locked()) {
3465                 return 0;
3466         }
3467
3468         if (n_outputs().n_total() == 0) {
3469                 return 0;
3470         }
3471
3472         if (!_active || n_inputs().n_total() == 0) {
3473                 silence_unlocked (nframes);
3474                 return 0;
3475         }
3476
3477         framepos_t unused = 0;
3478
3479         if ((nframes = check_initial_delay (nframes, unused)) == 0) {
3480                 return 0;
3481         }
3482
3483         _silent = false;
3484
3485         BufferSet& bufs = _session.get_route_buffers (n_process_buffers());
3486
3487         fill_buffers_with_input (bufs, _input, nframes);
3488
3489         if (_meter_point == MeterInput) {
3490                 _meter->run (bufs, start_frame, end_frame, 1.0, nframes, true);
3491         }
3492
3493         passthru (bufs, start_frame, end_frame, nframes, declick);
3494
3495         flush_processor_buffers_locked (nframes);
3496
3497         return 0;
3498 }
3499
3500 int
3501 Route::silent_roll (pframes_t nframes, framepos_t /*start_frame*/, framepos_t /*end_frame*/, bool& /* need_butler */)
3502 {
3503         silence (nframes);
3504         flush_processor_buffers_locked (nframes);
3505         return 0;
3506 }
3507
3508 void
3509 Route::flush_processors ()
3510 {
3511         /* XXX shouldn't really try to take this lock, since
3512            this is called from the RT audio thread.
3513         */
3514
3515         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3516
3517         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3518                 (*i)->flush ();
3519         }
3520 }
3521
3522 #ifdef __clang__
3523 __attribute__((annotate("realtime")))
3524 #endif
3525 bool
3526 Route::apply_processor_changes_rt ()
3527 {
3528         int emissions = EmitNone;
3529
3530         if (_pending_meter_point != _meter_point) {
3531                 Glib::Threads::RWLock::WriterLock pwl (_processor_lock, Glib::Threads::TRY_LOCK);
3532                 if (pwl.locked()) {
3533                         /* meters always have buffers for 'processor_max_streams'
3534                          * they can be re-positioned without re-allocation */
3535                         if (set_meter_point_unlocked()) {
3536                                 emissions |= EmitMeterChanged | EmitMeterVisibilityChange;;
3537                         } else {
3538                                 emissions |= EmitMeterChanged;
3539                         }
3540                 }
3541         }
3542
3543         bool changed = false;
3544
3545         if (g_atomic_int_get (&_pending_process_reorder)) {
3546                 Glib::Threads::RWLock::WriterLock pwl (_processor_lock, Glib::Threads::TRY_LOCK);
3547                 if (pwl.locked()) {
3548                         apply_processor_order (_pending_processor_order);
3549                         setup_invisible_processors ();
3550                         changed = true;
3551                         g_atomic_int_set (&_pending_process_reorder, 0);
3552                         emissions |= EmitRtProcessorChange;
3553                 }
3554         }
3555         if (changed) {
3556                 set_processor_positions ();
3557         }
3558         if (emissions != 0) {
3559                 g_atomic_int_set (&_pending_signals, emissions);
3560                 return true;
3561         }
3562         return (!selfdestruct_sequence.empty ());
3563 }
3564
3565 void
3566 Route::emit_pending_signals ()
3567 {
3568         int sig = g_atomic_int_and (&_pending_signals, 0);
3569         if (sig & EmitMeterChanged) {
3570                 _meter->emit_configuration_changed();
3571                 meter_change (); /* EMIT SIGNAL */
3572                 if (sig & EmitMeterVisibilityChange) {
3573                 processors_changed (RouteProcessorChange (RouteProcessorChange::MeterPointChange, true)); /* EMIT SIGNAL */
3574                 } else {
3575                 processors_changed (RouteProcessorChange (RouteProcessorChange::MeterPointChange, false)); /* EMIT SIGNAL */
3576                 }
3577         }
3578         if (sig & EmitRtProcessorChange) {
3579                 processors_changed (RouteProcessorChange (RouteProcessorChange::RealTimeChange)); /* EMIT SIGNAL */
3580         }
3581
3582         /* this would be a job for the butler.
3583          * Conceptually we should not take processe/processor locks here.
3584          * OTOH its more efficient (less overhead for summoning the butler and
3585          * telling her what do do) and signal emission is called
3586          * directly after the process callback, which decreases the chance
3587          * of x-runs when taking the locks.
3588          */
3589         while (!selfdestruct_sequence.empty ()) {
3590                 Glib::Threads::Mutex::Lock lx (selfdestruct_lock);
3591                 if (selfdestruct_sequence.empty ()) { break; } // re-check with lock
3592                 boost::shared_ptr<Processor> proc = selfdestruct_sequence.back ().lock ();
3593                 selfdestruct_sequence.pop_back ();
3594                 lx.release ();
3595                 if (proc) {
3596                         remove_processor (proc);
3597                 }
3598         }
3599 }
3600
3601 void
3602 Route::set_meter_point (MeterPoint p, bool force)
3603 {
3604         if (_pending_meter_point == p && !force) {
3605                 return;
3606         }
3607
3608         if (force || !AudioEngine::instance()->running()) {
3609                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
3610                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
3611                 _pending_meter_point = p;
3612                 _meter->emit_configuration_changed();
3613                 meter_change (); /* EMIT SIGNAL */
3614                 if (set_meter_point_unlocked()) {
3615                         processors_changed (RouteProcessorChange (RouteProcessorChange::MeterPointChange, true)); /* EMIT SIGNAL */
3616                 } else {
3617                         processors_changed (RouteProcessorChange (RouteProcessorChange::MeterPointChange, false)); /* EMIT SIGNAL */
3618                 }
3619         } else {
3620                 _pending_meter_point = p;
3621         }
3622 }
3623
3624
3625 #ifdef __clang__
3626 __attribute__((annotate("realtime")))
3627 #endif
3628 bool
3629 Route::set_meter_point_unlocked ()
3630 {
3631 #ifndef NDEBUG
3632         /* Caller must hold process and processor write lock */
3633         assert (!AudioEngine::instance()->process_lock().trylock());
3634         Glib::Threads::RWLock::WriterLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
3635         assert (!lm.locked ());
3636 #endif
3637
3638         _meter_point = _pending_meter_point;
3639
3640         bool meter_was_visible_to_user = _meter->display_to_user ();
3641
3642         if (!_custom_meter_position_noted) {
3643                 maybe_note_meter_position ();
3644         }
3645
3646         if (_meter_point != MeterCustom) {
3647
3648                 _meter->set_display_to_user (false);
3649
3650                 setup_invisible_processors ();
3651
3652         } else {
3653                 _meter->set_display_to_user (true);
3654
3655                 /* If we have a previous position for the custom meter, try to put it there */
3656                 boost::shared_ptr<Processor> after = _processor_after_last_custom_meter.lock ();
3657                 if (after) {
3658                         ProcessorList::iterator i = find (_processors.begin(), _processors.end(), after);
3659                         if (i != _processors.end ()) {
3660                                 _processors.remove (_meter);
3661                                 _processors.insert (i, _meter);
3662                         }
3663                 } else {// at end, right before the mains_out/panner
3664                         _processors.remove (_meter);
3665                         ProcessorList::iterator main = _processors.end();
3666                         _processors.insert (--main, _meter);
3667                 }
3668         }
3669
3670         /* Set up the meter for its new position */
3671
3672         ProcessorList::iterator loc = find (_processors.begin(), _processors.end(), _meter);
3673
3674         ChanCount m_in;
3675
3676         if (loc == _processors.begin()) {
3677                 m_in = _input->n_ports();
3678         } else {
3679                 ProcessorList::iterator before = loc;
3680                 --before;
3681                 m_in = (*before)->output_streams ();
3682         }
3683
3684         _meter->reflect_inputs (m_in);
3685
3686         /* we do not need to reconfigure the processors, because the meter
3687            (a) is always ready to handle processor_max_streams
3688            (b) is always an N-in/N-out processor, and thus moving
3689            it doesn't require any changes to the other processors.
3690         */
3691
3692         /* these should really be done after releasing the lock
3693          * but all those signals are subscribed to with gui_thread()
3694          * so we're safe.
3695          */
3696          return (_meter->display_to_user() != meter_was_visible_to_user);
3697 }
3698
3699 void
3700 Route::listen_position_changed ()
3701 {
3702         {
3703                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
3704                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
3705                 ProcessorState pstate (this);
3706
3707                 if (configure_processors_unlocked (0, &lm)) {
3708                         DEBUG_TRACE (DEBUG::Processors, "---- CONFIGURATION FAILED.\n");
3709                         pstate.restore ();
3710                         configure_processors_unlocked (0, &lm); // it worked before we tried to add it ...
3711                         return;
3712                 }
3713         }
3714
3715         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
3716         _session.set_dirty ();
3717 }
3718
3719 boost::shared_ptr<CapturingProcessor>
3720 Route::add_export_point()
3721 {
3722         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3723         if (!_capturing_processor) {
3724                 lm.release();
3725                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
3726                 Glib::Threads::RWLock::WriterLock lw (_processor_lock);
3727
3728                 // this aligns all tracks; but not tracks + busses
3729                 assert (_session.worst_track_latency () >= _initial_delay);
3730                 _capturing_processor.reset (new CapturingProcessor (_session, _session.worst_track_latency () - _initial_delay));
3731                 _capturing_processor->activate ();
3732
3733                 configure_processors_unlocked (0, &lw);
3734
3735         }
3736
3737         return _capturing_processor;
3738 }
3739
3740 framecnt_t
3741 Route::update_signal_latency ()
3742 {
3743         framecnt_t l = _output->user_latency();
3744         framecnt_t lamp = 0;
3745         bool before_amp = true;
3746         framecnt_t ltrim = 0;
3747         bool before_trim = true;
3748
3749         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3750                 if ((*i)->active ()) {
3751                         l += (*i)->signal_latency ();
3752                 }
3753                 if ((*i) == _amp) {
3754                         before_amp = false;
3755                 }
3756                 if ((*i) == _trim) {
3757                         before_amp = false;
3758                 }
3759                 if (before_amp) {
3760                         lamp = l;
3761                 }
3762                 if (before_trim) {
3763                         lamp = l;
3764                 }
3765         }
3766
3767         DEBUG_TRACE (DEBUG::Latency, string_compose ("%1: internal signal latency = %2\n", _name, l));
3768
3769         // TODO: (lamp - _signal_latency) to sync to output (read-ahed),  currently _roll_delay shifts this around
3770         _signal_latency_at_amp_position = lamp;
3771         _signal_latency_at_trim_position = ltrim;
3772
3773         if (_signal_latency != l) {
3774                 _signal_latency = l;
3775                 signal_latency_changed (); /* EMIT SIGNAL */
3776         }
3777
3778         return _signal_latency;
3779 }
3780
3781 void
3782 Route::set_user_latency (framecnt_t nframes)
3783 {
3784         _output->set_user_latency (nframes);
3785         _session.update_latency_compensation ();
3786 }
3787
3788 void
3789 Route::set_latency_compensation (framecnt_t longest_session_latency)
3790 {
3791         framecnt_t old = _initial_delay;
3792
3793         if (_signal_latency < longest_session_latency) {
3794                 _initial_delay = longest_session_latency - _signal_latency;
3795         } else {
3796                 _initial_delay = 0;
3797         }
3798
3799         DEBUG_TRACE (DEBUG::Latency, string_compose (
3800                              "%1: compensate for maximum latency of %2,"
3801                              "given own latency of %3, using initial delay of %4\n",
3802                              name(), longest_session_latency, _signal_latency, _initial_delay));
3803
3804         if (_initial_delay != old) {
3805                 initial_delay_changed (); /* EMIT SIGNAL */
3806         }
3807
3808         if (_session.transport_stopped()) {
3809                 _roll_delay = _initial_delay;
3810         }
3811 }
3812
3813 void
3814 Route::set_block_size (pframes_t nframes)
3815 {
3816         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3817                 (*i)->set_block_size (nframes);
3818         }
3819
3820         _session.ensure_buffers (n_process_buffers ());
3821 }
3822
3823 void
3824 Route::protect_automation ()
3825 {
3826         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i)
3827                 (*i)->protect_automation();
3828 }
3829
3830 /** @param declick 1 to set a pending declick fade-in,
3831  *                -1 to set a pending declick fade-out
3832  */
3833 void
3834 Route::set_pending_declick (int declick)
3835 {
3836         if (_declickable) {
3837                 /* this call is not allowed to turn off a pending declick */
3838                 if (declick) {
3839                         _pending_declick = declick;
3840                 }
3841         } else {
3842                 _pending_declick = 0;
3843         }
3844 }
3845
3846 /** Shift automation forwards from a particular place, thereby inserting time.
3847  *  Adds undo commands for any shifts that are performed.
3848  *
3849  * @param pos Position to start shifting from.
3850  * @param frames Amount to shift forwards by.
3851  */
3852
3853 void
3854 Route::shift (framepos_t pos, framecnt_t frames)
3855 {
3856         /* gain automation */
3857         {
3858                 boost::shared_ptr<AutomationControl> gc = _amp->gain_control();
3859
3860                 XMLNode &before = gc->alist()->get_state ();
3861                 gc->alist()->shift (pos, frames);
3862                 XMLNode &after = gc->alist()->get_state ();
3863                 _session.add_command (new MementoCommand<AutomationList> (*gc->alist().get(), &before, &after));
3864         }
3865
3866         /* gain automation */
3867         {
3868                 boost::shared_ptr<AutomationControl> gc = _trim->gain_control();
3869
3870                 XMLNode &before = gc->alist()->get_state ();
3871                 gc->alist()->shift (pos, frames);
3872                 XMLNode &after = gc->alist()->get_state ();
3873                 _session.add_command (new MementoCommand<AutomationList> (*gc->alist().get(), &before, &after));
3874         }
3875
3876         // TODO mute automation ??
3877
3878         /* pan automation */
3879         if (_pannable) {
3880                 ControlSet::Controls& c (_pannable->controls());
3881
3882                 for (ControlSet::Controls::const_iterator ci = c.begin(); ci != c.end(); ++ci) {
3883                         boost::shared_ptr<AutomationControl> pc = boost::dynamic_pointer_cast<AutomationControl> (ci->second);
3884                         if (pc) {
3885                                 boost::shared_ptr<AutomationList> al = pc->alist();
3886                                 XMLNode& before = al->get_state ();
3887                                 al->shift (pos, frames);
3888                                 XMLNode& after = al->get_state ();
3889                                 _session.add_command (new MementoCommand<AutomationList> (*al.get(), &before, &after));
3890                         }
3891                 }
3892         }
3893
3894         /* redirect automation */
3895         {
3896                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3897                 for (ProcessorList::iterator i = _processors.begin (); i != _processors.end (); ++i) {
3898
3899                         set<Evoral::Parameter> parameters = (*i)->what_can_be_automated();
3900
3901                         for (set<Evoral::Parameter>::const_iterator p = parameters.begin (); p != parameters.end (); ++p) {
3902                                 boost::shared_ptr<AutomationControl> ac = (*i)->automation_control (*p);
3903                                 if (ac) {
3904                                         boost::shared_ptr<AutomationList> al = ac->alist();
3905                                         XMLNode &before = al->get_state ();
3906                                         al->shift (pos, frames);
3907                                         XMLNode &after = al->get_state ();
3908                                         _session.add_command (new MementoCommand<AutomationList> (*al.get(), &before, &after));
3909                                 }
3910                         }
3911                 }
3912         }
3913 }
3914
3915 void
3916 Route::set_plugin_state_dir (boost::weak_ptr<Processor> p, const std::string& d)
3917 {
3918         boost::shared_ptr<Processor> processor (p.lock ());
3919         boost::shared_ptr<PluginInsert> pi  = boost::dynamic_pointer_cast<PluginInsert> (processor);
3920         if (!pi) {
3921                 return;
3922         }
3923         pi->set_state_dir (d);
3924 }
3925
3926 int
3927 Route::save_as_template (const string& path, const string& name)
3928 {
3929         std::string state_dir = path.substr (0, path.find_last_of ('.')); // strip template_suffix
3930         PBD::Unwinder<std::string> uw (_session._template_state_dir, state_dir);
3931
3932         XMLNode& node (state (false));
3933
3934         XMLTree tree;
3935
3936         IO::set_name_in_state (*node.children().front(), name);
3937
3938         tree.set_root (&node);
3939
3940         /* return zero on success, non-zero otherwise */
3941         return !tree.write (path.c_str());
3942 }
3943
3944
3945 bool
3946 Route::set_name (const string& str)
3947 {
3948         if (str == name()) {
3949                 return true;
3950         }
3951
3952         string name = Route::ensure_track_or_route_name (str, _session);
3953         SessionObject::set_name (name);
3954
3955         bool ret = (_input->set_name(name) && _output->set_name(name));
3956
3957         if (ret) {
3958                 /* rename the main outs. Leave other IO processors
3959                  * with whatever name they already have, because its
3960                  * just fine as it is (it will not contain the route
3961                  * name if its a port insert, port send or port return).
3962                  */
3963
3964                 if (_main_outs) {
3965                         if (_main_outs->set_name (name)) {
3966                                 /* XXX returning false here is stupid because
3967                                    we already changed the route name.
3968                                 */
3969                                 return false;
3970                         }
3971                 }
3972         }
3973
3974         return ret;
3975 }
3976
3977 /** Set the name of a route in an XML description.
3978  *  @param node XML <Route> node to set the name in.
3979  *  @param name New name.
3980  */
3981 void
3982 Route::set_name_in_state (XMLNode& node, string const & name, bool rename_playlist)
3983 {
3984         node.add_property (X_("name"), name);
3985
3986         XMLNodeList children = node.children();
3987         for (XMLNodeIterator i = children.begin(); i != children.end(); ++i) {
3988
3989                 if ((*i)->name() == X_("IO")) {
3990
3991                         IO::set_name_in_state (**i, name);
3992
3993                 } else if ((*i)->name() == X_("Processor")) {
3994
3995                         XMLProperty const * role = (*i)->property (X_("role"));
3996                         if (role && role->value() == X_("Main")) {
3997                                 (*i)->add_property (X_("name"), name);
3998                         }
3999
4000                 } else if ((*i)->name() == X_("Diskstream")) {
4001
4002                         if (rename_playlist) {
4003                                 (*i)->add_property (X_("playlist"), string_compose ("%1.1", name).c_str());
4004                         }
4005                         (*i)->add_property (X_("name"), name);
4006
4007                 }
4008         }
4009 }
4010
4011 boost::shared_ptr<Send>
4012 Route::internal_send_for (boost::shared_ptr<const Route> target) const
4013 {
4014         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4015
4016         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4017                 boost::shared_ptr<InternalSend> send;
4018
4019                 if ((send = boost::dynamic_pointer_cast<InternalSend>(*i)) != 0) {
4020                         if (send->target_route() == target) {
4021                                 return send;
4022                         }
4023                 }
4024         }
4025
4026         return boost::shared_ptr<Send>();
4027 }
4028
4029 void
4030 Route::set_denormal_protection (bool yn)
4031 {
4032         if (_denormal_protection != yn) {
4033                 _denormal_protection = yn;
4034                 denormal_protection_changed (); /* EMIT SIGNAL */
4035         }
4036 }
4037
4038 bool
4039 Route::denormal_protection () const
4040 {
4041         return _denormal_protection;
4042 }
4043
4044 void
4045 Route::set_active (bool yn, void* src)
4046 {
4047         if (_session.transport_rolling()) {
4048                 return;
4049         }
4050
4051         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_route_active()) {
4052                 _route_group->foreach_route (boost::bind (&Route::set_active, _1, yn, _route_group));
4053                 return;
4054         }
4055
4056         if (_active != yn) {
4057                 _active = yn;
4058                 _input->set_active (yn);
4059                 _output->set_active (yn);
4060                 active_changed (); // EMIT SIGNAL
4061                 _session.set_dirty ();
4062         }
4063 }
4064
4065 boost::shared_ptr<Pannable>
4066 Route::pannable() const
4067 {
4068         return _pannable;
4069 }
4070
4071 boost::shared_ptr<Panner>
4072 Route::panner() const
4073 {
4074         /* may be null ! */
4075         return _main_outs->panner_shell()->panner();
4076 }
4077
4078 boost::shared_ptr<PannerShell>
4079 Route::panner_shell() const
4080 {
4081         return _main_outs->panner_shell();
4082 }
4083
4084 boost::shared_ptr<GainControl>
4085 Route::gain_control() const
4086 {
4087         return _gain_control;
4088 }
4089
4090 boost::shared_ptr<GainControl>
4091 Route::trim_control() const
4092 {
4093         return _trim_control;
4094 }
4095
4096 boost::shared_ptr<PhaseControl>
4097 Route::phase_control() const
4098 {
4099         return _phase_control;
4100 }
4101
4102 boost::shared_ptr<AutomationControl>
4103 Route::get_control (const Evoral::Parameter& param)
4104 {
4105         /* either we own the control or .... */
4106
4107         boost::shared_ptr<AutomationControl> c = boost::dynamic_pointer_cast<AutomationControl>(control (param));
4108
4109         if (!c) {
4110
4111                 /* maybe one of our processors does or ... */
4112
4113                 Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
4114                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4115                         if ((c = boost::dynamic_pointer_cast<AutomationControl>((*i)->control (param))) != 0) {
4116                                 break;
4117                         }
4118                 }
4119         }
4120
4121         if (!c) {
4122
4123                 /* nobody does so we'll make a new one */
4124
4125                 c = boost::dynamic_pointer_cast<AutomationControl>(control_factory(param));
4126                 add_control(c);
4127         }
4128
4129         return c;
4130 }
4131
4132 boost::shared_ptr<Processor>
4133 Route::nth_plugin (uint32_t n) const
4134 {
4135         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4136         ProcessorList::const_iterator i;
4137
4138         for (i = _processors.begin(); i != _processors.end(); ++i) {
4139                 if (boost::dynamic_pointer_cast<PluginInsert> (*i)) {
4140                         if (n-- == 0) {
4141                                 return *i;
4142                         }
4143                 }
4144         }
4145
4146         return boost::shared_ptr<Processor> ();
4147 }
4148
4149 boost::shared_ptr<Processor>
4150 Route::nth_send (uint32_t n) const
4151 {
4152         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4153         ProcessorList::const_iterator i;
4154
4155         for (i = _processors.begin(); i != _processors.end(); ++i) {
4156                 if (boost::dynamic_pointer_cast<Send> (*i)) {
4157
4158                         if ((*i)->name().find (_("Monitor")) == 0) {
4159                                 /* send to monitor section is not considered
4160                                    to be an accessible send.
4161                                 */
4162                                 continue;
4163                         }
4164
4165                         if (n-- == 0) {
4166                                 return *i;
4167                         }
4168                 }
4169         }
4170
4171         return boost::shared_ptr<Processor> ();
4172 }
4173
4174 bool
4175 Route::has_io_processor_named (const string& name)
4176 {
4177         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4178         ProcessorList::iterator i;
4179
4180         for (i = _processors.begin(); i != _processors.end(); ++i) {
4181                 if (boost::dynamic_pointer_cast<Send> (*i) ||
4182                     boost::dynamic_pointer_cast<PortInsert> (*i)) {
4183                         if ((*i)->name() == name) {
4184                                 return true;
4185                         }
4186                 }
4187         }
4188
4189         return false;
4190 }
4191
4192 void
4193 Route::set_processor_positions ()
4194 {
4195         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4196
4197         bool had_amp = false;
4198         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4199                 (*i)->set_pre_fader (!had_amp);
4200                 if (*i == _amp) {
4201                         had_amp = true;
4202                 }
4203         }
4204 }
4205
4206 /** Called when there is a proposed change to the input port count */
4207 bool
4208 Route::input_port_count_changing (ChanCount to)
4209 {
4210         list<pair<ChanCount, ChanCount> > c = try_configure_processors (to, 0);
4211         if (c.empty()) {
4212                 /* The processors cannot be configured with the new input arrangement, so
4213                    block the change.
4214                 */
4215                 return true;
4216         }
4217
4218         /* The change is ok */
4219         return false;
4220 }
4221
4222 /** Called when there is a proposed change to the output port count */
4223 bool
4224 Route::output_port_count_changing (ChanCount to)
4225 {
4226         if (_strict_io && !_in_configure_processors) {
4227                 return true;
4228         }
4229         for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
4230                 if (processor_out_streams.get(*t) > to.get(*t)) {
4231                         return true;
4232                 }
4233         }
4234         /* The change is ok */
4235         return false;
4236 }
4237
4238 list<string>
4239 Route::unknown_processors () const
4240 {
4241         list<string> p;
4242
4243         if (_session.get_disable_all_loaded_plugins ()) {
4244                 // Do not list "missing plugins" if they are explicitly disabled
4245                 return p;
4246         }
4247
4248         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4249         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4250                 if (boost::dynamic_pointer_cast<UnknownProcessor const> (*i)) {
4251                         p.push_back ((*i)->name ());
4252                 }
4253         }
4254
4255         return p;
4256 }
4257
4258
4259 framecnt_t
4260 Route::update_port_latencies (PortSet& from, PortSet& to, bool playback, framecnt_t our_latency) const
4261 {
4262         /* we assume that all our input ports feed all our output ports. its not
4263            universally true, but the alternative is way too corner-case to worry about.
4264         */
4265
4266         LatencyRange all_connections;
4267
4268         if (from.empty()) {
4269                 all_connections.min = 0;
4270                 all_connections.max = 0;
4271         } else {
4272                 all_connections.min = ~((pframes_t) 0);
4273                 all_connections.max = 0;
4274
4275                 /* iterate over all "from" ports and determine the latency range for all of their
4276                    connections to the "outside" (outside of this Route).
4277                 */
4278
4279                 for (PortSet::iterator p = from.begin(); p != from.end(); ++p) {
4280
4281                         LatencyRange range;
4282
4283                         p->get_connected_latency_range (range, playback);
4284
4285                         all_connections.min = min (all_connections.min, range.min);
4286                         all_connections.max = max (all_connections.max, range.max);
4287                 }
4288         }
4289
4290         /* set the "from" port latencies to the max/min range of all their connections */
4291
4292         for (PortSet::iterator p = from.begin(); p != from.end(); ++p) {
4293                 p->set_private_latency_range (all_connections, playback);
4294         }
4295
4296         /* set the ports "in the direction of the flow" to the same value as above plus our own signal latency */
4297
4298         all_connections.min += our_latency;
4299         all_connections.max += our_latency;
4300
4301         for (PortSet::iterator p = to.begin(); p != to.end(); ++p) {
4302                 p->set_private_latency_range (all_connections, playback);
4303         }
4304
4305         return all_connections.max;
4306 }
4307
4308 framecnt_t
4309 Route::set_private_port_latencies (bool playback) const
4310 {
4311         framecnt_t own_latency = 0;
4312
4313         /* Processor list not protected by lock: MUST BE CALLED FROM PROCESS THREAD
4314            OR LATENCY CALLBACK.
4315
4316            This is called (early) from the latency callback. It computes the REAL
4317            latency associated with each port and stores the result as the "private"
4318            latency of the port. A later call to Route::set_public_port_latencies()
4319            sets all ports to the same value to reflect the fact that we do latency
4320            compensation and so all signals are delayed by the same amount as they
4321            flow through ardour.
4322         */
4323
4324         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4325                 if ((*i)->active ()) {
4326                         own_latency += (*i)->signal_latency ();
4327                 }
4328         }
4329
4330         if (playback) {
4331                 /* playback: propagate latency from "outside the route" to outputs to inputs */
4332                 return update_port_latencies (_output->ports (), _input->ports (), true, own_latency);
4333         } else {
4334                 /* capture: propagate latency from "outside the route" to inputs to outputs */
4335                 return update_port_latencies (_input->ports (), _output->ports (), false, own_latency);
4336         }
4337 }
4338
4339 void
4340 Route::set_public_port_latencies (framecnt_t value, bool playback) const
4341 {
4342         /* this is called to set the JACK-visible port latencies, which take
4343            latency compensation into account.
4344         */
4345
4346         LatencyRange range;
4347
4348         range.min = value;
4349         range.max = value;
4350
4351         {
4352                 const PortSet& ports (_input->ports());
4353                 for (PortSet::const_iterator p = ports.begin(); p != ports.end(); ++p) {
4354                         p->set_public_latency_range (range, playback);
4355                 }
4356         }
4357
4358         {
4359                 const PortSet& ports (_output->ports());
4360                 for (PortSet::const_iterator p = ports.begin(); p != ports.end(); ++p) {
4361                         p->set_public_latency_range (range, playback);
4362                 }
4363         }
4364 }
4365
4366 /** Put the invisible processors in the right place in _processors.
4367  *  Must be called with a writer lock on _processor_lock held.
4368  */
4369 #ifdef __clang__
4370 __attribute__((annotate("realtime")))
4371 #endif
4372 void
4373 Route::setup_invisible_processors ()
4374 {
4375 #ifndef NDEBUG
4376         Glib::Threads::RWLock::WriterLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
4377         assert (!lm.locked ());
4378 #endif
4379
4380         if (!_main_outs) {
4381                 /* too early to be doing this stuff */
4382                 return;
4383         }
4384
4385         /* we'll build this new list here and then use it
4386          *
4387          * TODO put the ProcessorList is on the stack for RT-safety.
4388          */
4389
4390         ProcessorList new_processors;
4391
4392         /* find visible processors */
4393
4394         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4395                 if ((*i)->display_to_user ()) {
4396                         new_processors.push_back (*i);
4397                 }
4398         }
4399
4400         /* find the amp */
4401
4402         ProcessorList::iterator amp = find (new_processors.begin(), new_processors.end(), _amp);
4403
4404         if (amp == new_processors.end ()) {
4405                 error << string_compose (_("Amp/Fader on Route '%1' went AWOL. Re-added."), name()) << endmsg;
4406                 new_processors.push_front (_amp);
4407                 amp = find (new_processors.begin(), new_processors.end(), _amp);
4408         }
4409
4410         /* and the processor after the amp */
4411
4412         ProcessorList::iterator after_amp = amp;
4413         ++after_amp;
4414
4415         /* METER */
4416
4417         if (_meter) {
4418                 switch (_meter_point) {
4419                 case MeterInput:
4420                         assert (!_meter->display_to_user ());
4421                         new_processors.push_front (_meter);
4422                         break;
4423                 case MeterPreFader:
4424                         assert (!_meter->display_to_user ());
4425                         new_processors.insert (amp, _meter);
4426                         break;
4427                 case MeterPostFader:
4428                         /* do nothing here */
4429                         break;
4430                 case MeterOutput:
4431                         /* do nothing here */
4432                         break;
4433                 case MeterCustom:
4434                         /* the meter is visible, so we don't touch it here */
4435                         break;
4436                 }
4437         }
4438
4439         /* MAIN OUTS */
4440
4441         assert (_main_outs);
4442         assert (!_main_outs->display_to_user ());
4443         new_processors.push_back (_main_outs);
4444
4445         /* iterator for the main outs */
4446
4447         ProcessorList::iterator main = new_processors.end();
4448         --main;
4449
4450         /* OUTPUT METERING */
4451
4452         if (_meter && (_meter_point == MeterOutput || _meter_point == MeterPostFader)) {
4453                 assert (!_meter->display_to_user ());
4454
4455                 /* add the processor just before or just after the main outs */
4456
4457                 ProcessorList::iterator meter_point = main;
4458
4459                 if (_meter_point == MeterOutput) {
4460                         ++meter_point;
4461                 }
4462                 new_processors.insert (meter_point, _meter);
4463         }
4464
4465         /* MONITOR SEND */
4466
4467         if (_monitor_send && !is_monitor ()) {
4468                 assert (!_monitor_send->display_to_user ());
4469                 switch (Config->get_listen_position ()) {
4470                 case PreFaderListen:
4471                         switch (Config->get_pfl_position ()) {
4472                         case PFLFromBeforeProcessors:
4473                                 new_processors.push_front (_monitor_send);
4474                                 break;
4475                         case PFLFromAfterProcessors:
4476                                 new_processors.insert (amp, _monitor_send);
4477                                 break;
4478                         }
4479                         _monitor_send->set_can_pan (false);
4480                         break;
4481                 case AfterFaderListen:
4482                         switch (Config->get_afl_position ()) {
4483                         case AFLFromBeforeProcessors:
4484                                 new_processors.insert (after_amp, _monitor_send);
4485                                 break;
4486                         case AFLFromAfterProcessors:
4487                                 new_processors.insert (new_processors.end(), _monitor_send);
4488                                 break;
4489                         }
4490                         _monitor_send->set_can_pan (true);
4491                         break;
4492                 }
4493         }
4494
4495 #if 0 // not used - just yet
4496         if (!is_master() && !is_monitor() && !is_auditioner()) {
4497                 new_processors.push_front (_delayline);
4498         }
4499 #endif
4500
4501         /* MONITOR CONTROL */
4502
4503         if (_monitor_control && is_monitor ()) {
4504                 assert (!_monitor_control->display_to_user ());
4505                 new_processors.insert (amp, _monitor_control);
4506         }
4507
4508         /* TRIM CONTROL */
4509
4510         if (_trim && _trim->active()) {
4511                 assert (!_trim->display_to_user ());
4512                 new_processors.push_front (_trim);
4513         }
4514
4515         /* INTERNAL RETURN */
4516
4517         /* doing this here means that any monitor control will come after
4518            the return and trim.
4519         */
4520
4521         if (_intreturn) {
4522                 assert (!_intreturn->display_to_user ());
4523                 new_processors.push_front (_intreturn);
4524         }
4525
4526         /* EXPORT PROCESSOR */
4527
4528         if (_capturing_processor) {
4529                 assert (!_capturing_processor->display_to_user ());
4530                 new_processors.push_front (_capturing_processor);
4531         }
4532
4533         _processors = new_processors;
4534
4535         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4536                 if (!(*i)->display_to_user () && !(*i)->enabled () && (*i) != _monitor_send) {
4537                         (*i)->enable (true);
4538                 }
4539         }
4540
4541         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: setup_invisible_processors\n", _name));
4542         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4543                 DEBUG_TRACE (DEBUG::Processors, string_compose ("\t%1\n", (*i)->name ()));
4544         }
4545 }
4546
4547 void
4548 Route::unpan ()
4549 {
4550         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
4551         Glib::Threads::RWLock::ReaderLock lp (_processor_lock);
4552
4553         _pannable.reset ();
4554
4555         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4556                 boost::shared_ptr<Delivery> d = boost::dynamic_pointer_cast<Delivery>(*i);
4557                 if (d) {
4558                         d->unpan ();
4559                 }
4560         }
4561 }
4562
4563 /** If the meter point is `Custom', make a note of where the meter is.
4564  *  This is so that if the meter point is subsequently set to something else,
4565  *  and then back to custom, we can put the meter back where it was last time
4566  *  custom was enabled.
4567  *
4568  *  Must be called with the _processor_lock held.
4569  */
4570 void
4571 Route::maybe_note_meter_position ()
4572 {
4573         if (_meter_point != MeterCustom) {
4574                 return;
4575         }
4576
4577         _custom_meter_position_noted = true;
4578         /* custom meter points range from after trim to before panner/main_outs
4579          * this is a limitation by the current processor UI
4580          */
4581         bool seen_trim = false;
4582         _processor_after_last_custom_meter.reset();
4583         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4584                 if ((*i) == _trim) {
4585                         seen_trim = true;
4586                 }
4587                 if ((*i) == _main_outs) {
4588                         _processor_after_last_custom_meter = *i;
4589                         break;
4590                 }
4591                 if (boost::dynamic_pointer_cast<PeakMeter> (*i)) {
4592                         if (!seen_trim) {
4593                                 _processor_after_last_custom_meter = _trim;
4594                         } else {
4595                                 ProcessorList::iterator j = i;
4596                                 ++j;
4597                                 assert(j != _processors.end ()); // main_outs should be before
4598                                 _processor_after_last_custom_meter = *j;
4599                         }
4600                         break;
4601                 }
4602         }
4603         assert(_processor_after_last_custom_meter.lock());
4604 }
4605
4606 boost::shared_ptr<Processor>
4607 Route::processor_by_id (PBD::ID id) const
4608 {
4609         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4610         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4611                 if ((*i)->id() == id) {
4612                         return *i;
4613                 }
4614         }
4615
4616         return boost::shared_ptr<Processor> ();
4617 }
4618
4619 /** @return the monitoring state, or in other words what data we are pushing
4620  *  into the route (data from the inputs, data from disk or silence)
4621  */
4622 MonitorState
4623 Route::monitoring_state () const
4624 {
4625         return MonitoringInput;
4626 }
4627
4628 /** @return what we should be metering; either the data coming from the input
4629  *  IO or the data that is flowing through the route.
4630  */
4631 MeterState
4632 Route::metering_state () const
4633 {
4634         return MeteringRoute;
4635 }
4636
4637 bool
4638 Route::has_external_redirects () const
4639 {
4640         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4641
4642                 /* ignore inactive processors and obviously ignore the main
4643                  * outs since everything has them and we don't care.
4644                  */
4645
4646                 if ((*i)->active() && (*i) != _main_outs && (*i)->does_routing()) {
4647                         return true;;
4648                 }
4649         }
4650
4651         return false;
4652 }
4653
4654 boost::shared_ptr<Processor>
4655 Route::the_instrument () const
4656 {
4657         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4658         return the_instrument_unlocked ();
4659 }
4660
4661 boost::shared_ptr<Processor>
4662 Route::the_instrument_unlocked () const
4663 {
4664         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4665                 boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert>(*i);
4666                 if (pi && pi->plugin ()->get_info ()->is_instrument ()) {
4667                         return (*i);
4668                 }
4669         }
4670         return boost::shared_ptr<Processor>();
4671 }
4672
4673
4674
4675 void
4676 Route::non_realtime_locate (framepos_t pos)
4677 {
4678         if (_pannable) {
4679                 _pannable->transport_located (pos);
4680         }
4681
4682         if (_delayline.get()) {
4683                 _delayline.get()->flush();
4684         }
4685
4686         {
4687                 //Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
4688                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4689
4690                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4691                         (*i)->transport_located (pos);
4692                 }
4693         }
4694         _roll_delay = _initial_delay;
4695 }
4696
4697 void
4698 Route::fill_buffers_with_input (BufferSet& bufs, boost::shared_ptr<IO> io, pframes_t nframes)
4699 {
4700         size_t n_buffers;
4701         size_t i;
4702
4703         /* MIDI
4704          *
4705          * We don't currently mix MIDI input together, so we don't need the
4706          * complex logic of the audio case.
4707          */
4708
4709         n_buffers = bufs.count().n_midi ();
4710
4711         for (i = 0; i < n_buffers; ++i) {
4712
4713                 boost::shared_ptr<MidiPort> source_port = io->midi (i);
4714                 MidiBuffer& buf (bufs.get_midi (i));
4715
4716                 if (source_port) {
4717                         buf.copy (source_port->get_midi_buffer(nframes));
4718                 } else {
4719                         buf.silence (nframes);
4720                 }
4721         }
4722
4723         /* AUDIO */
4724
4725         n_buffers = bufs.count().n_audio();
4726
4727         size_t n_ports = io->n_ports().n_audio();
4728         float scaling = 1.0f;
4729
4730         if (n_ports > n_buffers) {
4731                 scaling = ((float) n_buffers) / n_ports;
4732         }
4733
4734         for (i = 0; i < n_ports; ++i) {
4735
4736                 /* if there are more ports than buffers, map them onto buffers
4737                  * in a round-robin fashion
4738                  */
4739
4740                 boost::shared_ptr<AudioPort> source_port = io->audio (i);
4741                 AudioBuffer& buf (bufs.get_audio (i%n_buffers));
4742
4743
4744                 if (i < n_buffers) {
4745
4746                         /* first time through just copy a channel into
4747                            the output buffer.
4748                         */
4749
4750                         buf.read_from (source_port->get_audio_buffer (nframes), nframes);
4751
4752                         if (scaling != 1.0f) {
4753                                 buf.apply_gain (scaling, nframes);
4754                         }
4755
4756                 } else {
4757
4758                         /* on subsequent times around, merge data from
4759                          * the port with what is already there
4760                          */
4761
4762                         if (scaling != 1.0f) {
4763                                 buf.accumulate_with_gain_from (source_port->get_audio_buffer (nframes), nframes, 0, scaling);
4764                         } else {
4765                                 buf.accumulate_from (source_port->get_audio_buffer (nframes), nframes);
4766                         }
4767                 }
4768         }
4769
4770         /* silence any remaining buffers */
4771
4772         for (; i < n_buffers; ++i) {
4773                 AudioBuffer& buf (bufs.get_audio (i));
4774                 buf.silence (nframes);
4775         }
4776
4777         /* establish the initial setup of the buffer set, reflecting what was
4778            copied into it. unless, of course, we are the auditioner, in which
4779            case nothing was fed into it from the inputs at all.
4780         */
4781
4782         if (!is_auditioner()) {
4783                 bufs.set_count (io->n_ports());
4784         }
4785 }
4786
4787 boost::shared_ptr<AutomationControl>
4788 Route::pan_azimuth_control() const
4789 {
4790 #ifdef MIXBUS
4791         boost::shared_ptr<ARDOUR::PluginInsert> plug = ch_post();
4792         if (!plug) {
4793                 return boost::shared_ptr<AutomationControl>();
4794         }
4795         const uint32_t port_channel_post_pan = 2; // gtk2_ardour/mixbus_ports.h
4796         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (plug->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, port_channel_post_pan)));
4797 #else
4798         if (!_pannable || !panner()) {
4799                 return boost::shared_ptr<AutomationControl>();
4800         }
4801         return _pannable->pan_azimuth_control;
4802 #endif
4803 }
4804
4805 boost::shared_ptr<AutomationControl>
4806 Route::pan_elevation_control() const
4807 {
4808         if (Profile->get_mixbus() || !_pannable || !panner()) {
4809                 return boost::shared_ptr<AutomationControl>();
4810         }
4811
4812         set<Evoral::Parameter> c = panner()->what_can_be_automated ();
4813
4814         if (c.find (PanElevationAutomation) != c.end()) {
4815                 return _pannable->pan_elevation_control;
4816         } else {
4817                 return boost::shared_ptr<AutomationControl>();
4818         }
4819 }
4820 boost::shared_ptr<AutomationControl>
4821 Route::pan_width_control() const
4822 {
4823         if (Profile->get_mixbus() || !_pannable || !panner()) {
4824                 return boost::shared_ptr<AutomationControl>();
4825         }
4826
4827         set<Evoral::Parameter> c = panner()->what_can_be_automated ();
4828
4829         if (c.find (PanWidthAutomation) != c.end()) {
4830                 return _pannable->pan_width_control;
4831         } else {
4832                 return boost::shared_ptr<AutomationControl>();
4833         }
4834 }
4835 boost::shared_ptr<AutomationControl>
4836 Route::pan_frontback_control() const
4837 {
4838         if (Profile->get_mixbus() || !_pannable || !panner()) {
4839                 return boost::shared_ptr<AutomationControl>();
4840         }
4841
4842         set<Evoral::Parameter> c = panner()->what_can_be_automated ();
4843
4844         if (c.find (PanFrontBackAutomation) != c.end()) {
4845                 return _pannable->pan_frontback_control;
4846         } else {
4847                 return boost::shared_ptr<AutomationControl>();
4848         }
4849 }
4850 boost::shared_ptr<AutomationControl>
4851 Route::pan_lfe_control() const
4852 {
4853         if (Profile->get_mixbus() || !_pannable || !panner()) {
4854                 return boost::shared_ptr<AutomationControl>();
4855         }
4856
4857         set<Evoral::Parameter> c = panner()->what_can_be_automated ();
4858
4859         if (c.find (PanLFEAutomation) != c.end()) {
4860                 return _pannable->pan_lfe_control;
4861         } else {
4862                 return boost::shared_ptr<AutomationControl>();
4863         }
4864 }
4865
4866 uint32_t
4867 Route::eq_band_cnt () const
4868 {
4869         if (Profile->get_mixbus()) {
4870                 return 3;
4871         } else {
4872                 /* Ardour has no well-known EQ object */
4873                 return 0;
4874         }
4875 }
4876
4877 boost::shared_ptr<AutomationControl>
4878 Route::eq_gain_controllable (uint32_t band) const
4879 {
4880 #ifdef MIXBUS
4881         boost::shared_ptr<PluginInsert> eq = ch_eq();
4882
4883         if (!eq) {
4884                 return boost::shared_ptr<AutomationControl>();
4885         }
4886
4887         uint32_t port_number;
4888         switch (band) {
4889         case 0:
4890                 if (is_master() || mixbus()) {
4891                         port_number = 4;
4892                 } else {
4893                         port_number = 8;
4894                 }
4895                 break;
4896         case 1:
4897                 if (is_master() || mixbus()) {
4898                         port_number = 3;
4899                 } else {
4900                         port_number = 6;
4901                 }
4902                 break;
4903         case 2:
4904                 if (is_master() || mixbus()) {
4905                         port_number = 2;
4906                 } else {
4907                         port_number = 4;
4908                 }
4909                 break;
4910         default:
4911                 return boost::shared_ptr<AutomationControl>();
4912         }
4913
4914         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (eq->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, port_number)));
4915 #else
4916         return boost::shared_ptr<AutomationControl>();
4917 #endif
4918 }
4919 boost::shared_ptr<AutomationControl>
4920 Route::eq_freq_controllable (uint32_t band) const
4921 {
4922 #ifdef MIXBUS
4923
4924         if (mixbus() || is_master()) {
4925                 /* no frequency controls for mixbusses or master */
4926                 return boost::shared_ptr<AutomationControl>();
4927         }
4928
4929         boost::shared_ptr<PluginInsert> eq = ch_eq();
4930
4931         if (!eq) {
4932                 return boost::shared_ptr<AutomationControl>();
4933         }
4934
4935         uint32_t port_number;
4936         switch (band) {
4937         case 0:
4938                 port_number = 7;
4939                 break;
4940         case 1:
4941                 port_number = 5;
4942                 break;
4943         case 2:
4944                 port_number = 3;
4945                 break;
4946         default:
4947                 return boost::shared_ptr<AutomationControl>();
4948         }
4949
4950         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (eq->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, port_number)));
4951 #else
4952         return boost::shared_ptr<AutomationControl>();
4953 #endif
4954 }
4955
4956 boost::shared_ptr<AutomationControl>
4957 Route::eq_q_controllable (uint32_t band) const
4958 {
4959         return boost::shared_ptr<AutomationControl>();
4960 }
4961
4962 boost::shared_ptr<AutomationControl>
4963 Route::eq_shape_controllable (uint32_t band) const
4964 {
4965         return boost::shared_ptr<AutomationControl>();
4966 }
4967
4968 boost::shared_ptr<AutomationControl>
4969 Route::eq_enable_controllable () const
4970 {
4971 #ifdef MIXBUS
4972         boost::shared_ptr<PluginInsert> eq = ch_eq();
4973
4974         if (!eq) {
4975                 return boost::shared_ptr<AutomationControl>();
4976         }
4977
4978         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (eq->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, 1)));
4979 #else
4980         return boost::shared_ptr<AutomationControl>();
4981 #endif
4982 }
4983
4984 boost::shared_ptr<AutomationControl>
4985 Route::eq_hpf_controllable () const
4986 {
4987 #ifdef MIXBUS
4988         boost::shared_ptr<PluginInsert> eq = ch_eq();
4989
4990         if (!eq) {
4991                 return boost::shared_ptr<AutomationControl>();
4992         }
4993
4994         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (eq->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, 2)));
4995 #else
4996         return boost::shared_ptr<AutomationControl>();
4997 #endif
4998 }
4999
5000 string
5001 Route::eq_band_name (uint32_t band) const
5002 {
5003         if (Profile->get_mixbus()) {
5004                 switch (band) {
5005                 case 0:
5006                         return _("lo");
5007                 case 1:
5008                         return _("mid");
5009                 case 2:
5010                         return _("hi");
5011                 default:
5012                         return string();
5013                 }
5014         } else {
5015                 return string ();
5016         }
5017 }
5018
5019 boost::shared_ptr<AutomationControl>
5020 Route::comp_enable_controllable () const
5021 {
5022 #ifdef MIXBUS
5023         boost::shared_ptr<PluginInsert> comp = ch_comp();
5024
5025         if (!comp) {
5026                 return boost::shared_ptr<AutomationControl>();
5027         }
5028
5029         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (comp->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, 1)));
5030 #else
5031         return boost::shared_ptr<AutomationControl>();
5032 #endif
5033 }
5034 boost::shared_ptr<AutomationControl>
5035 Route::comp_threshold_controllable () const
5036 {
5037 #ifdef MIXBUS
5038         boost::shared_ptr<PluginInsert> comp = ch_comp();
5039
5040         if (!comp) {
5041                 return boost::shared_ptr<AutomationControl>();
5042         }
5043
5044         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (comp->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, 2)));
5045
5046 #else
5047         return boost::shared_ptr<AutomationControl>();
5048 #endif
5049 }
5050 boost::shared_ptr<AutomationControl>
5051 Route::comp_speed_controllable () const
5052 {
5053 #ifdef MIXBUS
5054         boost::shared_ptr<PluginInsert> comp = ch_comp();
5055
5056         if (!comp) {
5057                 return boost::shared_ptr<AutomationControl>();
5058         }
5059
5060         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (comp->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, 3)));
5061 #else
5062         return boost::shared_ptr<AutomationControl>();
5063 #endif
5064 }
5065 boost::shared_ptr<AutomationControl>
5066 Route::comp_mode_controllable () const
5067 {
5068 #ifdef MIXBUS
5069         boost::shared_ptr<PluginInsert> comp = ch_comp();
5070
5071         if (!comp) {
5072                 return boost::shared_ptr<AutomationControl>();
5073         }
5074
5075         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (comp->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, 4)));
5076 #else
5077         return boost::shared_ptr<AutomationControl>();
5078 #endif
5079 }
5080 boost::shared_ptr<AutomationControl>
5081 Route::comp_makeup_controllable () const
5082 {
5083 #ifdef MIXBUS
5084         boost::shared_ptr<PluginInsert> comp = ch_comp();
5085
5086         if (!comp) {
5087                 return boost::shared_ptr<AutomationControl>();
5088         }
5089
5090         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (comp->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, 5)));
5091 #else
5092         return boost::shared_ptr<AutomationControl>();
5093 #endif
5094 }
5095 boost::shared_ptr<AutomationControl>
5096 Route::comp_redux_controllable () const
5097 {
5098 #ifdef MIXBUS
5099         boost::shared_ptr<PluginInsert> comp = ch_comp();
5100
5101         if (!comp) {
5102                 return boost::shared_ptr<AutomationControl>();
5103         }
5104
5105         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (comp->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, 6)));
5106 #else
5107         return boost::shared_ptr<AutomationControl>();
5108 #endif
5109 }
5110
5111 string
5112 Route::comp_mode_name (uint32_t mode) const
5113 {
5114 #ifdef MIXBUS
5115         switch (mode) {
5116         case 0:
5117                 return _("Leveler");
5118         case 1:
5119                 return _("Compressor");
5120         case 2:
5121                 return _("Limiter");
5122         case 3:
5123                 return mixbus() ? _("Sidechain") : _("Limiter");
5124         }
5125
5126         return _("???");
5127 #else
5128         return _("???");
5129 #endif
5130 }
5131
5132 string
5133 Route::comp_speed_name (uint32_t mode) const
5134 {
5135 #ifdef MIXBUS
5136         switch (mode) {
5137         case 0:
5138                 return _("Attk");
5139         case 1:
5140                 return _("Ratio");
5141         case 2:
5142         case 3:
5143                 return _("Rels");
5144         }
5145         return _("???");
5146 #else
5147         return _("???");
5148 #endif
5149 }
5150
5151 boost::shared_ptr<AutomationControl>
5152 Route::send_level_controllable (uint32_t n) const
5153 {
5154 #ifdef  MIXBUS
5155         boost::shared_ptr<ARDOUR::PluginInsert> plug = ch_post();
5156         if (!plug) {
5157                 return boost::shared_ptr<AutomationControl>();
5158         }
5159
5160         if (n >= 8) {
5161                 /* no such bus */
5162                 return boost::shared_ptr<AutomationControl>();
5163         }
5164
5165         const uint32_t port_id = port_channel_post_aux1_level + (2*n); // gtk2_ardour/mixbus_ports.h
5166         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (plug->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, port_id)));
5167 #else
5168         boost::shared_ptr<Send> s = boost::dynamic_pointer_cast<Send>(nth_send (n));
5169         if (!s) {
5170                 return boost::shared_ptr<AutomationControl>();
5171         }
5172         return s->gain_control ();
5173 #endif
5174 }
5175
5176 boost::shared_ptr<AutomationControl>
5177 Route::send_enable_controllable (uint32_t n) const
5178 {
5179 #ifdef  MIXBUS
5180         boost::shared_ptr<ARDOUR::PluginInsert> plug = ch_post();
5181         if (!plug) {
5182                 return boost::shared_ptr<AutomationControl>();
5183         }
5184
5185         if (n >= 8) {
5186                 /* no such bus */
5187                 return boost::shared_ptr<AutomationControl>();
5188         }
5189
5190         const uint32_t port_id = port_channel_post_aux1_asgn + (2*n); // gtk2_ardour/mixbus_ports.h
5191         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (plug->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, port_id)));
5192 #else
5193         /* although Ardour sends have enable/disable as part of the Processor
5194            API, it is not exposed as a controllable.
5195
5196            XXX: we should fix this.
5197         */
5198         return boost::shared_ptr<AutomationControl>();
5199 #endif
5200 }
5201
5202 string
5203 Route::send_name (uint32_t n) const
5204 {
5205 #ifdef MIXBUS
5206         if (n >= 8) {
5207                 return string();
5208         }
5209         boost::shared_ptr<Route> r = _session.get_mixbus (n);
5210         assert (r);
5211         return r->name();
5212 #else
5213         boost::shared_ptr<Processor> p = nth_send (n);
5214         if (p) {
5215                 return p->name();
5216         } else {
5217                 return string();
5218         }
5219 #endif
5220 }
5221
5222 boost::shared_ptr<AutomationControl>
5223 Route::master_send_enable_controllable () const
5224 {
5225 #ifdef  MIXBUS
5226         boost::shared_ptr<ARDOUR::PluginInsert> plug = ch_post();
5227         if (!plug) {
5228                 return boost::shared_ptr<AutomationControl>();
5229         }
5230         return boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (plug->control (Evoral::Parameter (ARDOUR::PluginAutomation, 0, port_channel_post_mstr_assign)));
5231 #else
5232         return boost::shared_ptr<AutomationControl>();
5233 #endif
5234 }
5235
5236 bool
5237 Route::slaved () const
5238 {
5239         if (!_gain_control) {
5240                 return false;
5241         }
5242         /* just test one particular control, not all of them */
5243         return _gain_control->slaved ();
5244 }
5245
5246 bool
5247 Route::slaved_to (boost::shared_ptr<VCA> vca) const
5248 {
5249         if (!vca || !_gain_control) {
5250                 return false;
5251         }
5252
5253         /* just test one particular control, not all of them */
5254
5255         return _gain_control->slaved_to (vca->gain_control());
5256 }
5257
5258 bool
5259 Route::muted_by_others_soloing () const
5260 {
5261         if (!can_be_muted_by_others ()) {
5262                 return false;
5263         }
5264
5265         return _session.soloing() && !_solo_control->soloed() && !_solo_isolate_control->solo_isolated();
5266 }
5267
5268 void
5269 Route::clear_all_solo_state ()
5270 {
5271         double v = _solo_safe_control->get_value ();
5272
5273         _solo_control->clear_all_solo_state ();
5274
5275         if (v != 0.0) {
5276                 _solo_safe_control->set_value (v, Controllable::NoGroup);
5277         }
5278 }