libs/ardour/route.cc

   1 /*
   2     Copyright (C) 2000 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifdef WAF_BUILD
  21 #include "libardour-config.h"
  22 #endif
  23
  24 #include <cmath>
  25 #include <fstream>
  26 #include <cassert>
  27 #include <algorithm>
  28
  29 #include <boost/algorithm/string.hpp>
  30
  31 #include "pbd/xml++.h"
  32 #include "pbd/enumwriter.h"
  33 #include "pbd/memento_command.h"
  34 #include "pbd/stacktrace.h"
  35 #include "pbd/convert.h"
  36 #include "pbd/boost_debug.h"
  37
  38 #include "ardour/amp.h"
  39 #include "ardour/audio_buffer.h"
  40 #include "ardour/audio_port.h"
  41 #include "ardour/audioengine.h"
  42 #include "ardour/buffer.h"
  43 #include "ardour/buffer_set.h"
  44 #include "ardour/capturing_processor.h"
  45 #include "ardour/debug.h"
  46 #include "ardour/delivery.h"
  47 #include "ardour/internal_return.h"
  48 #include "ardour/internal_send.h"
  49 #include "ardour/meter.h"
  50 #include "ardour/midi_buffer.h"
  51 #include "ardour/midi_port.h"
  52 #include "ardour/monitor_processor.h"
  53 #include "ardour/pannable.h"
  54 #include "ardour/panner.h"
  55 #include "ardour/panner_shell.h"
  56 #include "ardour/plugin_insert.h"
  57 #include "ardour/port.h"
  58 #include "ardour/port_insert.h"
  59 #include "ardour/processor.h"
  60 #include "ardour/route.h"
  61 #include "ardour/route_group.h"
  62 #include "ardour/send.h"
  63 #include "ardour/session.h"
  64 #include "ardour/unknown_processor.h"
  65 #include "ardour/utils.h"
  66
  67 #include "i18n.h"
  68
  69 using namespace std;
  70 using namespace ARDOUR;
  71 using namespace PBD;
  72
  73 PBD::Signal0<void> Route::SyncOrderKeys;
  74 PBD::Signal0<void> Route::RemoteControlIDChange;
  75
  76 Route::Route (Session& sess, string name, Flag flg, DataType default_type)
  77         : SessionObject (sess, name)
  78         , Automatable (sess)
  79         , GraphNode (sess._process_graph)
  80         , _active (true)
  81         , _signal_latency (0)
  82         , _initial_delay (0)
  83         , _roll_delay (0)
  84         , _flags (flg)
  85         , _pending_declick (true)
  86         , _meter_point (MeterPostFader)
  87         , _meter_type (MeterPeak)
  88         , _self_solo (false)
  89         , _soloed_by_others_upstream (0)
  90         , _soloed_by_others_downstream (0)
  91         , _solo_isolated (0)
  92         , _denormal_protection (false)
  93         , _recordable (true)
  94         , _silent (false)
  95         , _declickable (false)
  96         , _mute_master (new MuteMaster (sess, name))
  97         , _have_internal_generator (false)
  98         , _solo_safe (false)
  99         , _default_type (default_type)
 100         , _order_key (0)
 101         , _has_order_key (false)
 102         , _remote_control_id (0)
 103         , _in_configure_processors (false)
 104         , _initial_io_setup (false)
 105         , _custom_meter_position_noted (false)
 106         , _last_custom_meter_was_at_end (false)
 107 {
 108         if (is_master()) {
 109                 _meter_type = MeterK20;
 110         }
 111         processor_max_streams.reset();
 112 }
 113
 114 int
 115 Route::init ()
 116 {
 117         /* add standard controls */
 118
 119         _solo_control.reset (new SoloControllable (X_("solo"), shared_from_this ()));
 120         _mute_control.reset (new MuteControllable (X_("mute"), shared_from_this ()));
 121
 122         _solo_control->set_flags (Controllable::Flag (_solo_control->flags() | Controllable::Toggle));
 123         _mute_control->set_flags (Controllable::Flag (_mute_control->flags() | Controllable::Toggle));
 124
 125         add_control (_solo_control);
 126         add_control (_mute_control);
 127
 128         /* panning */
 129
 130         if (!(_flags & Route::MonitorOut)) {
 131                 _pannable.reset (new Pannable (_session));
 132         }
 133
 134         /* input and output objects */
 135
 136         _input.reset (new IO (_session, _name, IO::Input, _default_type));
 137         _output.reset (new IO (_session, _name, IO::Output, _default_type));
 138
 139         _input->changed.connect_same_thread (*this, boost::bind (&Route::input_change_handler, this, _1, _2));
 140         _input->PortCountChanging.connect_same_thread (*this, boost::bind (&Route::input_port_count_changing, this, _1));
 141
 142         _output->changed.connect_same_thread (*this, boost::bind (&Route::output_change_handler, this, _1, _2));
 143         _output->PortCountChanging.connect_same_thread (*this, boost::bind (&Route::output_port_count_changing, this, _1));
 144
 145         /* add amp processor  */
 146
 147         _amp.reset (new Amp (_session));
 148         add_processor (_amp, PostFader);
 149
 150         /* create standard processors: meter, main outs, monitor out;
 151            they will be added to _processors by setup_invisible_processors ()
 152         */
 153
 154         _meter.reset (new PeakMeter (_session, _name));
 155         _meter->set_owner (this);
 156         _meter->set_display_to_user (false);
 157         _meter->activate ();
 158
 159         _main_outs.reset (new Delivery (_session, _output, _pannable, _mute_master, _name, Delivery::Main));
 160         _main_outs->activate ();
 161
 162         if (is_monitor()) {
 163                 /* where we listen to tracks */
 164                 _intreturn.reset (new InternalReturn (_session));
 165                 _intreturn->activate ();
 166
 167                 /* the thing that provides proper control over a control/monitor/listen bus
 168                    (such as per-channel cut, dim, solo, invert, etc).
 169                 */
 170                 _monitor_control.reset (new MonitorProcessor (_session));
 171                 _monitor_control->activate ();
 172         }
 173
 174         if (is_master() || is_monitor() || is_auditioner()) {
 175                 _mute_master->set_solo_ignore (true);
 176         }
 177
 178         /* now that we have _meter, its safe to connect to this */
 179
 180         Metering::Meter.connect_same_thread (*this, (boost::bind (&Route::meter, this)));
 181
 182         {
 183                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
 184                 configure_processors (0);
 185         }
 186
 187         return 0;
 188 }
 189
 190 Route::~Route ()
 191 {
 192         DEBUG_TRACE (DEBUG::Destruction, string_compose ("route %1 destructor\n", _name));
 193
 194         /* do this early so that we don't get incoming signals as we are going through destruction
 195          */
 196
 197         drop_connections ();
 198
 199         /* don't use clear_processors here, as it depends on the session which may
 200            be half-destroyed by now
 201         */
 202
 203         Glib::Threads::RWLock::WriterLock lm (_processor_lock);
 204         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 205                 (*i)->drop_references ();
 206         }
 207
 208         _processors.clear ();
 209 }
 210
 211 void
 212 Route::set_remote_control_id (uint32_t id, bool notify_class_listeners)
 213 {
 214         if (Config->get_remote_model() != UserOrdered) {
 215                 return;
 216         }
 217
 218         set_remote_control_id_internal (id, notify_class_listeners);
 219 }
 220
 221 void
 222 Route::set_remote_control_id_internal (uint32_t id, bool notify_class_listeners)
 223 {
 224         /* force IDs for master/monitor busses and prevent
 225            any other route from accidentally getting these IDs
 226            (i.e. legacy sessions)
 227         */
 228
 229         if (is_master() && id != MasterBusRemoteControlID) {
 230                 id = MasterBusRemoteControlID;
 231         }
 232
 233         if (is_monitor() && id != MonitorBusRemoteControlID) {
 234                 id = MonitorBusRemoteControlID;
 235         }
 236
 237         if (id < 1) {
 238                 return;
 239         }
 240
 241         /* don't allow it to collide */
 242
 243         if (!is_master () && !is_monitor() &&
 244             (id == MasterBusRemoteControlID || id == MonitorBusRemoteControlID)) {
 245                 id += MonitorBusRemoteControlID;
 246         }
 247
 248         if (id != remote_control_id()) {
 249                 _remote_control_id = id;
 250                 RemoteControlIDChanged ();
 251
 252                 if (notify_class_listeners) {
 253                         RemoteControlIDChange ();
 254                 }
 255         }
 256 }
 257
 258 uint32_t
 259 Route::remote_control_id() const
 260 {
 261         if (is_master()) {
 262                 return MasterBusRemoteControlID;
 263         }
 264
 265         if (is_monitor()) {
 266                 return MonitorBusRemoteControlID;
 267         }
 268
 269         return _remote_control_id;
 270 }
 271
 272 bool
 273 Route::has_order_key () const
 274 {
 275         return _has_order_key;
 276 }
 277
 278 uint32_t
 279 Route::order_key () const
 280 {
 281         return _order_key;
 282 }
 283
 284 void
 285 Route::set_remote_control_id_explicit (uint32_t rid)
 286 {
 287         if (is_master() || is_monitor() || is_auditioner()) {
 288                 /* hard-coded remote IDs, or no remote ID */
 289                 return;
 290         }
 291
 292         if (_remote_control_id != rid) {
 293                 DEBUG_TRACE (DEBUG::OrderKeys, string_compose ("%1: set edit-based RID to %2\n", name(), rid));
 294                 _remote_control_id = rid;
 295                 RemoteControlIDChanged (); /* EMIT SIGNAL (per-route) */
 296         }
 297
 298         /* don't emit the class-level RID signal RemoteControlIDChange here,
 299            leave that to the entity that changed the order key, so that we
 300            don't get lots of emissions for no good reasons (e.g. when changing
 301            all route order keys).
 302
 303            See Session::sync_remote_id_from_order_keys() for the (primary|only)
 304            spot where that is emitted.
 305         */
 306 }
 307
 308 void
 309 Route::set_order_key (uint32_t n)
 310 {
 311         _has_order_key = true;
 312
 313         if (_order_key == n) {
 314                 return;
 315         }
 316
 317         _order_key = n;
 318
 319         DEBUG_TRACE (DEBUG::OrderKeys, string_compose ("%1 order key set to %2\n",
 320                                                        name(), order_key ()));
 321
 322         _session.set_dirty ();
 323 }
 324
 325 string
 326 Route::ensure_track_or_route_name(string name, Session &session)
 327 {
 328         string newname = name;
 329
 330         while (!session.io_name_is_legal (newname)) {
 331                 newname = bump_name_once (newname, '.');
 332         }
 333
 334         return newname;
 335 }
 336
 337
 338 void
 339 Route::inc_gain (gain_t fraction, void *src)
 340 {
 341         _amp->inc_gain (fraction, src);
 342 }
 343
 344 void
 345 Route::set_gain (gain_t val, void *src)
 346 {
 347         if (src != 0 && _route_group && src != _route_group && _route_group->is_active() && _route_group->is_gain()) {
 348
 349                 if (_route_group->is_relative()) {
 350
 351                         gain_t usable_gain = _amp->gain();
 352                         if (usable_gain < 0.000001f) {
 353                                 usable_gain = 0.000001f;
 354                         }
 355
 356                         gain_t delta = val;
 357                         if (delta < 0.000001f) {
 358                                 delta = 0.000001f;
 359                         }
 360
 361                         delta -= usable_gain;
 362
 363                         if (delta == 0.0f)
 364                                 return;
 365
 366                         gain_t factor = delta / usable_gain;
 367
 368                         if (factor > 0.0f) {
 369                                 factor = _route_group->get_max_factor(factor);
 370                                 if (factor == 0.0f) {
 371                                         _amp->gain_control()->Changed(); /* EMIT SIGNAL */
 372                                         return;
 373                                 }
 374                         } else {
 375                                 factor = _route_group->get_min_factor(factor);
 376                                 if (factor == 0.0f) {
 377                                         _amp->gain_control()->Changed(); /* EMIT SIGNAL */
 378                                         return;
 379                                 }
 380                         }
 381
 382                         _route_group->foreach_route (boost::bind (&Route::inc_gain, _1, factor, _route_group));
 383
 384                 } else {
 385
 386                         _route_group->foreach_route (boost::bind (&Route::set_gain, _1, val, _route_group));
 387                 }
 388
 389                 return;
 390         }
 391
 392         if (val == _amp->gain()) {
 393                 return;
 394         }
 395
 396         _amp->set_gain (val, src);
 397 }
 398
 399 void
 400 Route::maybe_declick (BufferSet&, framecnt_t, int)
 401 {
 402         /* this is the "bus" implementation and they never declick.
 403          */
 404         return;
 405 }
 406
 407 /** Process this route for one (sub) cycle (process thread)
 408  *
 409  * @param bufs Scratch buffers to use for the signal path
 410  * @param start_frame Initial transport frame
 411  * @param end_frame Final transport frame
 412  * @param nframes Number of frames to output (to ports)
 413  *
 414  * Note that (end_frame - start_frame) may not be equal to nframes when the
 415  * transport speed isn't 1.0 (eg varispeed).
 416  */
 417 void
 418 Route::process_output_buffers (BufferSet& bufs,
 419                                framepos_t start_frame, framepos_t end_frame, pframes_t nframes,
 420                                int declick, bool gain_automation_ok)
 421 {
 422         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
 423         assert(lm.locked());
 424
 425         /* figure out if we're going to use gain automation */
 426         if (gain_automation_ok) {
 427                 _amp->set_gain_automation_buffer (_session.gain_automation_buffer ());
 428                 _amp->setup_gain_automation (start_frame, end_frame, nframes);
 429         } else {
 430                 _amp->apply_gain_automation (false);
 431         }
 432
 433         /* Tell main outs what to do about monitoring.  We do this so that
 434            on a transition between monitoring states we get a de-clicking gain
 435            change in the _main_outs delivery.
 436         */
 437
 438         _main_outs->no_outs_cuz_we_no_monitor (monitoring_state () == MonitoringSilence);
 439
 440         /* -------------------------------------------------------------------------------------------
 441            GLOBAL DECLICK (for transport changes etc.)
 442            ----------------------------------------------------------------------------------------- */
 443
 444         maybe_declick (bufs, nframes, declick);
 445         _pending_declick = 0;
 446
 447         /* -------------------------------------------------------------------------------------------
 448            DENORMAL CONTROL/PHASE INVERT
 449            ----------------------------------------------------------------------------------------- */
 450
 451         if (_phase_invert.any ()) {
 452
 453                 int chn = 0;
 454
 455                 if (_denormal_protection || Config->get_denormal_protection()) {
 456
 457                         for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i, ++chn) {
 458                                 Sample* const sp = i->data();
 459
 460                                 if (_phase_invert[chn]) {
 461                                         for (pframes_t nx = 0; nx < nframes; ++nx) {
 462                                                 sp[nx]  = -sp[nx];
 463                                                 sp[nx] += 1.0e-27f;
 464                                         }
 465                                 } else {
 466                                         for (pframes_t nx = 0; nx < nframes; ++nx) {
 467                                                 sp[nx] += 1.0e-27f;
 468                                         }
 469                                 }
 470                         }
 471
 472                 } else {
 473
 474                         for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i, ++chn) {
 475                                 Sample* const sp = i->data();
 476
 477                                 if (_phase_invert[chn]) {
 478                                         for (pframes_t nx = 0; nx < nframes; ++nx) {
 479                                                 sp[nx] = -sp[nx];
 480                                         }
 481                                 }
 482                         }
 483                 }
 484
 485         } else {
 486
 487                 if (_denormal_protection || Config->get_denormal_protection()) {
 488
 489                         for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) {
 490                                 Sample* const sp = i->data();
 491                                 for (pframes_t nx = 0; nx < nframes; ++nx) {
 492                                         sp[nx] += 1.0e-27f;
 493                                 }
 494                         }
 495
 496                 }
 497         }
 498
 499         /* -------------------------------------------------------------------------------------------
 500            and go ....
 501            ----------------------------------------------------------------------------------------- */
 502
 503         /* set this to be true if the meter will already have been ::run() earlier */
 504         bool const meter_already_run = metering_state() == MeteringInput;
 505
 506         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 507
 508                 if (meter_already_run && boost::dynamic_pointer_cast<PeakMeter> (*i)) {
 509                         /* don't ::run() the meter, otherwise it will have its previous peak corrupted */
 510                         continue;
 511                 }
 512
 513 #ifndef NDEBUG
 514                 /* if it has any inputs, make sure they match */
 515                 if (boost::dynamic_pointer_cast<UnknownProcessor> (*i) == 0 && (*i)->input_streams() != ChanCount::ZERO) {
 516                         if (bufs.count() != (*i)->input_streams()) {
 517                                 DEBUG_TRACE (
 518                                         DEBUG::Processors, string_compose (
 519                                                 "input port mismatch %1 bufs = %2 input for %3 = %4\n",
 520                                                 _name, bufs.count(), (*i)->name(), (*i)->input_streams()
 521                                                 )
 522                                         );
 523                         }
 524                 }
 525 #endif
 526
 527                 /* should we NOT run plugins here if the route is inactive?
 528                    do we catch route != active somewhere higher?
 529                 */
 530
 531                 (*i)->run (bufs, start_frame, end_frame, nframes, *i != _processors.back());
 532                 bufs.set_count ((*i)->output_streams());
 533         }
 534 }
 535
 536 ChanCount
 537 Route::n_process_buffers ()
 538 {
 539         return max (_input->n_ports(), processor_max_streams);
 540 }
 541
 542 void
 543 Route::monitor_run (framepos_t start_frame, framepos_t end_frame, pframes_t nframes, int declick)
 544 {
 545         assert (is_monitor());
 546         BufferSet& bufs (_session.get_route_buffers (n_process_buffers()));
 547         passthru (bufs, start_frame, end_frame, nframes, declick);
 548 }
 549
 550 void
 551 Route::passthru (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame, pframes_t nframes, int declick)
 552 {
 553         _silent = false;
 554
 555         if (is_monitor() && _session.listening() && !_session.is_auditioning()) {
 556
 557                 /* control/monitor bus ignores input ports when something is
 558                    feeding the listen "stream". data will "arrive" into the
 559                    route from the intreturn processor element.
 560                 */
 561
 562                 bufs.silence (nframes, 0);
 563         }
 564
 565         write_out_of_band_data (bufs, start_frame, end_frame, nframes);
 566         process_output_buffers (bufs, start_frame, end_frame, nframes, declick, true);
 567 }
 568
 569 void
 570 Route::passthru_silence (framepos_t start_frame, framepos_t end_frame, pframes_t nframes, int declick)
 571 {
 572         BufferSet& bufs (_session.get_route_buffers (n_process_buffers(), true));
 573
 574         bufs.set_count (_input->n_ports());
 575         write_out_of_band_data (bufs, start_frame, end_frame, nframes);
 576         process_output_buffers (bufs, start_frame, end_frame, nframes, declick, false);
 577 }
 578
 579 void
 580 Route::set_listen (bool yn, void* src)
 581 {
 582         if (_solo_safe) {
 583                 return;
 584         }
 585
 586         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_solo()) {
 587                 _route_group->foreach_route (boost::bind (&Route::set_listen, _1, yn, _route_group));
 588                 return;
 589         }
 590
 591         if (_monitor_send) {
 592                 if (yn != _monitor_send->active()) {
 593                         if (yn) {
 594                                 _monitor_send->activate ();
 595                                 _mute_master->set_soloed (true);
 596                         } else {
 597                                 _monitor_send->deactivate ();
 598                                 _mute_master->set_soloed (false);
 599                         }
 600
 601                         listen_changed (src); /* EMIT SIGNAL */
 602                 }
 603         }
 604 }
 605
 606 bool
 607 Route::listening_via_monitor () const
 608 {
 609         if (_monitor_send) {
 610                 return _monitor_send->active ();
 611         } else {
 612                 return false;
 613         }
 614 }
 615
 616 void
 617 Route::set_solo_safe (bool yn, void *src)
 618 {
 619         if (_solo_safe != yn) {
 620                 _solo_safe = yn;
 621                 solo_safe_changed (src);
 622         }
 623 }
 624
 625 bool
 626 Route::solo_safe() const
 627 {
 628         return _solo_safe;
 629 }
 630
 631 void
 632 Route::set_solo (bool yn, void *src)
 633 {
 634         if (_solo_safe) {
 635                 DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 ignore solo change due to solo-safe\n", name()));
 636                 return;
 637         }
 638
 639         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_solo()) {
 640                 _route_group->foreach_route (boost::bind (&Route::set_solo, _1, yn, _route_group));
 641                 return;
 642         }
 643
 644         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1: set solo => %2, src: %3 grp ? %4 currently self-soloed ? %5\n",
 645                                                   name(), yn, src, (src == _route_group), self_soloed()));
 646
 647         if (self_soloed() != yn) {
 648                 set_self_solo (yn);
 649                 set_mute_master_solo ();
 650                 solo_changed (true, src); /* EMIT SIGNAL */
 651                 _solo_control->Changed (); /* EMIT SIGNAL */
 652         }
 653 }
 654
 655 void
 656 Route::set_self_solo (bool yn)
 657 {
 658         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1: set SELF solo => %2\n", name(), yn));
 659         _self_solo = yn;
 660 }
 661
 662 void
 663 Route::mod_solo_by_others_upstream (int32_t delta)
 664 {
 665         if (_solo_safe) {
 666                 DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 ignore solo-by-upstream due to solo-safe\n", name()));
 667                 return;
 668         }
 669
 670         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 mod solo-by-upstream by %2, current up = %3 down = %4\n",
 671                                                   name(), delta, _soloed_by_others_upstream, _soloed_by_others_downstream));
 672
 673         uint32_t old_sbu = _soloed_by_others_upstream;
 674
 675         if (delta < 0) {
 676                 if (_soloed_by_others_upstream >= (uint32_t) abs (delta)) {
 677                         _soloed_by_others_upstream += delta;
 678                 } else {
 679                         _soloed_by_others_upstream = 0;
 680                 }
 681         } else {
 682                 _soloed_by_others_upstream += delta;
 683         }
 684
 685         DEBUG_TRACE (DEBUG::Solo, string_compose (
 686                              "%1 SbU delta %2 = %3 old = %4 sbd %5 ss %6 exclusive %7\n",
 687                              name(), delta, _soloed_by_others_upstream, old_sbu,
 688                              _soloed_by_others_downstream, _self_solo, Config->get_exclusive_solo()));
 689
 690         /* push the inverse solo change to everything that feeds us.
 691
 692            This is important for solo-within-group. When we solo 1 track out of N that
 693            feed a bus, that track will cause mod_solo_by_upstream (+1) to be called
 694            on the bus. The bus then needs to call mod_solo_by_downstream (-1) on all
 695            tracks that feed it. This will silence them if they were audible because
 696            of a bus solo, but the newly soloed track will still be audible (because
 697            it is self-soloed).
 698
 699            but .. do this only when we are being told to solo-by-upstream (i.e delta = +1),
 700            not in reverse.
 701         */
 702
 703         if ((_self_solo || _soloed_by_others_downstream) &&
 704             ((old_sbu == 0 && _soloed_by_others_upstream > 0) ||
 705              (old_sbu > 0 && _soloed_by_others_upstream == 0))) {
 706
 707                 if (delta > 0 || !Config->get_exclusive_solo()) {
 708                         DEBUG_TRACE (DEBUG::Solo, "\t ... INVERT push\n");
 709                         for (FedBy::iterator i = _fed_by.begin(); i != _fed_by.end(); ++i) {
 710                                 boost::shared_ptr<Route> sr = i->r.lock();
 711                                 if (sr) {
 712                                         sr->mod_solo_by_others_downstream (-delta);
 713                                 }
 714                         }
 715                 }
 716         }
 717
 718         set_mute_master_solo ();
 719         solo_changed (false, this);
 720 }
 721
 722 void
 723 Route::mod_solo_by_others_downstream (int32_t delta)
 724 {
 725         if (_solo_safe) {
 726                 DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 ignore solo-by-downstream due to solo safe\n", name()));
 727                 return;
 728         }
 729
 730         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 mod solo-by-downstream by %2, current up = %3 down = %4\n",
 731                                                   name(), delta, _soloed_by_others_upstream, _soloed_by_others_downstream));
 732
 733         if (delta < 0) {
 734                 if (_soloed_by_others_downstream >= (uint32_t) abs (delta)) {
 735                         _soloed_by_others_downstream += delta;
 736                 } else {
 737                         _soloed_by_others_downstream = 0;
 738                 }
 739         } else {
 740                 _soloed_by_others_downstream += delta;
 741         }
 742
 743         DEBUG_TRACE (DEBUG::Solo, string_compose ("%1 SbD delta %2 = %3\n", name(), delta, _soloed_by_others_downstream));
 744
 745         set_mute_master_solo ();
 746         solo_changed (false, this);
 747 }
 748
 749 void
 750 Route::set_mute_master_solo ()
 751 {
 752         _mute_master->set_soloed (self_soloed() || soloed_by_others_downstream() || soloed_by_others_upstream());
 753 }
 754
 755 void
 756 Route::set_solo_isolated (bool yn, void *src)
 757 {
 758         if (is_master() || is_monitor() || is_auditioner()) {
 759                 return;
 760         }
 761
 762         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_solo()) {
 763                 _route_group->foreach_route (boost::bind (&Route::set_solo_isolated, _1, yn, _route_group));
 764                 return;
 765         }
 766
 767         /* forward propagate solo-isolate status to everything fed by this route, but not those via sends only */
 768
 769         boost::shared_ptr<RouteList> routes = _session.get_routes ();
 770         for (RouteList::iterator i = routes->begin(); i != routes->end(); ++i) {
 771
 772                 if ((*i).get() == this || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_auditioner()) {
 773                         continue;
 774                 }
 775
 776                 bool sends_only;
 777                 bool does_feed = direct_feeds_according_to_graph (*i, &sends_only); // we will recurse anyway, so don't use ::feeds()
 778
 779                 if (does_feed && !sends_only) {
 780                         (*i)->set_solo_isolated (yn, (*i)->route_group());
 781                 }
 782         }
 783
 784         /* XXX should we back-propagate as well? (April 2010: myself and chris goddard think not) */
 785
 786         bool changed = false;
 787
 788         if (yn) {
 789                 if (_solo_isolated == 0) {
 790                         _mute_master->set_solo_ignore (true);
 791                         changed = true;
 792                 }
 793                 _solo_isolated++;
 794         } else {
 795                 if (_solo_isolated > 0) {
 796                         _solo_isolated--;
 797                         if (_solo_isolated == 0) {
 798                                 _mute_master->set_solo_ignore (false);
 799                                 changed = true;
 800                         }
 801                 }
 802         }
 803
 804         if (changed) {
 805                 solo_isolated_changed (src);
 806         }
 807 }
 808
 809 bool
 810 Route::solo_isolated () const
 811 {
 812         return _solo_isolated > 0;
 813 }
 814
 815 void
 816 Route::set_mute_points (MuteMaster::MutePoint mp)
 817 {
 818         _mute_master->set_mute_points (mp);
 819         mute_points_changed (); /* EMIT SIGNAL */
 820
 821         if (_mute_master->muted_by_self()) {
 822                 mute_changed (this); /* EMIT SIGNAL */
 823                 _mute_control->Changed (); /* EMIT SIGNAL */
 824         }
 825 }
 826
 827 void
 828 Route::set_mute (bool yn, void *src)
 829 {
 830         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_mute()) {
 831                 _route_group->foreach_route (boost::bind (&Route::set_mute, _1, yn, _route_group));
 832                 return;
 833         }
 834
 835         if (muted() != yn) {
 836                 _mute_master->set_muted_by_self (yn);
 837                 /* allow any derived classes to respond to the mute change
 838                    before anybody else knows about it.
 839                 */
 840                 act_on_mute ();
 841                 /* tell everyone else */
 842                 mute_changed (src); /* EMIT SIGNAL */
 843                 _mute_control->Changed (); /* EMIT SIGNAL */
 844         }
 845 }
 846
 847 bool
 848 Route::muted () const
 849 {
 850         return _mute_master->muted_by_self();
 851 }
 852
 853 #if 0
 854 static void
 855 dump_processors(const string& name, const list<boost::shared_ptr<Processor> >& procs)
 856 {
 857         cerr << name << " {" << endl;
 858         for (list<boost::shared_ptr<Processor> >::const_iterator p = procs.begin();
 859                         p != procs.end(); ++p) {
 860                 cerr << "\t" << (*p)->name() << " ID = " << (*p)->id() << " @ " << (*p) << endl;
 861         }
 862         cerr << "}" << endl;
 863 }
 864 #endif
 865
 866 /** Supposing that we want to insert a Processor at a given Placement, return
 867  *  the processor to add the new one before (or 0 to add at the end).
 868  */
 869 boost::shared_ptr<Processor>
 870 Route::before_processor_for_placement (Placement p)
 871 {
 872         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
 873
 874         ProcessorList::iterator loc;
 875
 876         if (p == PreFader) {
 877                 /* generic pre-fader: insert immediately before the amp */
 878                 loc = find (_processors.begin(), _processors.end(), _amp);
 879         } else {
 880                 /* generic post-fader: insert right before the main outs */
 881                 loc = find (_processors.begin(), _processors.end(), _main_outs);
 882         }
 883
 884         return loc != _processors.end() ? *loc : boost::shared_ptr<Processor> ();
 885 }
 886
 887 /** Supposing that we want to insert a Processor at a given index, return
 888  *  the processor to add the new one before (or 0 to add at the end).
 889  */
 890 boost::shared_ptr<Processor>
 891 Route::before_processor_for_index (int index)
 892 {
 893         if (index == -1) {
 894                 return boost::shared_ptr<Processor> ();
 895         }
 896
 897         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
 898
 899         ProcessorList::iterator i = _processors.begin ();
 900         int j = 0;
 901         while (i != _processors.end() && j < index) {
 902                 if ((*i)->display_to_user()) {
 903                         ++j;
 904                 }
 905
 906                 ++i;
 907         }
 908
 909         return (i != _processors.end() ? *i : boost::shared_ptr<Processor> ());
 910 }
 911
 912 /** Add a processor either pre- or post-fader
 913  *  @return 0 on success, non-0 on failure.
 914  */
 915 int
 916 Route::add_processor (boost::shared_ptr<Processor> processor, Placement placement, ProcessorStreams* err, bool activation_allowed)
 917 {
 918         return add_processor (processor, before_processor_for_placement (placement), err, activation_allowed);
 919 }
 920
 921
 922 /** Add a processor to a route such that it ends up with a given index into the visible processors.
 923  *  @param index Index to add the processor at, or -1 to add at the end of the list.
 924  *  @return 0 on success, non-0 on failure.
 925  */
 926 int
 927 Route::add_processor_by_index (boost::shared_ptr<Processor> processor, int index, ProcessorStreams* err, bool activation_allowed)
 928 {
 929         return add_processor (processor, before_processor_for_index (index), err, activation_allowed);
 930 }
 931
 932 /** Add a processor to the route.
 933  *  @param before An existing processor in the list, or 0; the new processor will be inserted immediately before it (or at the end).
 934  *  @return 0 on success, non-0 on failure.
 935  */
 936 int
 937 Route::add_processor (boost::shared_ptr<Processor> processor, boost::shared_ptr<Processor> before, ProcessorStreams* err, bool activation_allowed)
 938 {
 939         assert (processor != _meter);
 940         assert (processor != _main_outs);
 941
 942         DEBUG_TRACE (DEBUG::Processors, string_compose (
 943                              "%1 adding processor %2\n", name(), processor->name()));
 944
 945         if (!AudioEngine::instance()->connected() || !processor) {
 946                 return 1;
 947         }
 948
 949         {
 950                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
 951                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
 952                 ProcessorState pstate (this);
 953
 954                 boost::shared_ptr<PluginInsert> pi;
 955                 boost::shared_ptr<PortInsert> porti;
 956
 957                 if (processor == _amp) {
 958                         /* Ensure that only one amp is in the list at any time */
 959                         ProcessorList::iterator check = find (_processors.begin(), _processors.end(), processor);
 960                         if (check != _processors.end()) {
 961                                 if (before == _amp) {
 962                                         /* Already in position; all is well */
 963                                         return 0;
 964                                 } else {
 965                                         _processors.erase (check);
 966                                 }
 967                         }
 968                 }
 969
 970                 assert (find (_processors.begin(), _processors.end(), processor) == _processors.end ());
 971
 972                 ProcessorList::iterator loc;
 973                 if (before) {
 974                         /* inserting before a processor; find it */
 975                         loc = find (_processors.begin(), _processors.end(), before);
 976                         if (loc == _processors.end ()) {
 977                                 /* Not found */
 978                                 return 1;
 979                         }
 980                 } else {
 981                         /* inserting at end */
 982                         loc = _processors.end ();
 983                 }
 984
 985                 _processors.insert (loc, processor);
 986                 processor->set_owner (this);
 987
 988                 // Set up processor list channels.  This will set processor->[input|output]_streams(),
 989                 // configure redirect ports properly, etc.
 990
 991                 {
 992                         if (configure_processors_unlocked (err)) {
 993                                 pstate.restore ();
 994                                 configure_processors_unlocked (0); // it worked before we tried to add it ...
 995                                 return -1;
 996                         }
 997                 }
 998
 999                 if ((pi = boost::dynamic_pointer_cast<PluginInsert>(processor)) != 0) {
1000
1001                         if (pi->has_no_inputs ()) {
1002                                 /* generator plugin */
1003                                 _have_internal_generator = true;
1004                         }
1005
1006                 }
1007
1008                 if (activation_allowed && !_session.get_disable_all_loaded_plugins()) {
1009                         processor->activate ();
1010                 }
1011
1012                 processor->ActiveChanged.connect_same_thread (*this, boost::bind (&Session::update_latency_compensation, &_session, false));
1013
1014                 _output->set_user_latency (0);
1015         }
1016
1017         reset_instrument_info ();
1018         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1019         set_processor_positions ();
1020
1021         return 0;
1022 }
1023
1024 bool
1025 Route::add_processor_from_xml_2X (const XMLNode& node, int version)
1026 {
1027         const XMLProperty *prop;
1028
1029         try {
1030                 boost::shared_ptr<Processor> processor;
1031
1032                 /* bit of a hack: get the `placement' property from the <Redirect> tag here
1033                    so that we can add the processor in the right place (pre/post-fader)
1034                 */
1035
1036                 XMLNodeList const & children = node.children ();
1037                 XMLNodeList::const_iterator i = children.begin ();
1038
1039                 while (i != children.end() && (*i)->name() != X_("Redirect")) {
1040                         ++i;
1041                 }
1042
1043                 Placement placement = PreFader;
1044
1045                 if (i != children.end()) {
1046                         if ((prop = (*i)->property (X_("placement"))) != 0) {
1047                                 placement = Placement (string_2_enum (prop->value(), placement));
1048                         }
1049                 }
1050
1051                 if (node.name() == "Insert") {
1052
1053                         if ((prop = node.property ("type")) != 0) {
1054
1055                                 if (prop->value() == "ladspa" || prop->value() == "Ladspa" ||
1056                                                 prop->value() == "lv2" ||
1057                                                 prop->value() == "windows-vst" ||
1058                                                 prop->value() == "lxvst" ||
1059                                                 prop->value() == "audiounit") {
1060
1061                                         processor.reset (new PluginInsert (_session));
1062
1063                                 } else {
1064
1065                                         processor.reset (new PortInsert (_session, _pannable, _mute_master));
1066                                 }
1067
1068                         }
1069
1070                 } else if (node.name() == "Send") {
1071
1072                         processor.reset (new Send (_session, _pannable, _mute_master));
1073
1074                 } else {
1075
1076                         error << string_compose(_("unknown Processor type \"%1\"; ignored"), node.name()) << endmsg;
1077                         return false;
1078                 }
1079
1080                 if (processor->set_state (node, version)) {
1081                         return false;
1082                 }
1083
1084                 return (add_processor (processor, placement) == 0);
1085         }
1086
1087         catch (failed_constructor &err) {
1088                 warning << _("processor could not be created. Ignored.") << endmsg;
1089                 return false;
1090         }
1091 }
1092
1093 int
1094 Route::add_processors (const ProcessorList& others, boost::shared_ptr<Processor> before, ProcessorStreams* err)
1095 {
1096         /* NOTE: this is intended to be used ONLY when copying
1097            processors from another Route. Hence the subtle
1098            differences between this and ::add_processor()
1099         */
1100
1101         ProcessorList::iterator loc;
1102
1103         if (before) {
1104                 loc = find(_processors.begin(), _processors.end(), before);
1105         } else {
1106                 /* nothing specified - at end */
1107                 loc = _processors.end ();
1108         }
1109
1110         if (!_session.engine().connected()) {
1111                 return 1;
1112         }
1113
1114         if (others.empty()) {
1115                 return 0;
1116         }
1117
1118         {
1119                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
1120                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1121                 ProcessorState pstate (this);
1122
1123                 for (ProcessorList::const_iterator i = others.begin(); i != others.end(); ++i) {
1124
1125                         if (*i == _meter) {
1126                                 continue;
1127                         }
1128
1129                         boost::shared_ptr<PluginInsert> pi;
1130
1131                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1132                                 pi->set_count (1);
1133                         }
1134
1135                         _processors.insert (loc, *i);
1136                         (*i)->set_owner (this);
1137
1138                         if ((*i)->active()) {
1139                                 (*i)->activate ();
1140                         }
1141
1142                         /* Think: does this really need to be called for every processor in the loop? */
1143                         {
1144                                 if (configure_processors_unlocked (err)) {
1145                                         pstate.restore ();
1146                                         configure_processors_unlocked (0); // it worked before we tried to add it ...
1147                                         return -1;
1148                                 }
1149                         }
1150
1151                         (*i)->ActiveChanged.connect_same_thread (*this, boost::bind (&Session::update_latency_compensation, &_session, false));
1152                 }
1153
1154                 for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
1155                         boost::shared_ptr<PluginInsert> pi;
1156
1157                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1158                                 if (pi->has_no_inputs ()) {
1159                                         _have_internal_generator = true;
1160                                         break;
1161                                 }
1162                         }
1163                 }
1164
1165                 _output->set_user_latency (0);
1166         }
1167
1168         reset_instrument_info ();
1169         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1170         set_processor_positions ();
1171
1172         return 0;
1173 }
1174
1175 void
1176 Route::placement_range(Placement p, ProcessorList::iterator& start, ProcessorList::iterator& end)
1177 {
1178         if (p == PreFader) {
1179                 start = _processors.begin();
1180                 end = find(_processors.begin(), _processors.end(), _amp);
1181         } else {
1182                 start = find(_processors.begin(), _processors.end(), _amp);
1183                 ++start;
1184                 end = _processors.end();
1185         }
1186 }
1187
1188 /** Turn off all processors with a given placement
1189  * @param p Placement of processors to disable
1190  */
1191 void
1192 Route::disable_processors (Placement p)
1193 {
1194         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1195
1196         ProcessorList::iterator start, end;
1197         placement_range(p, start, end);
1198
1199         for (ProcessorList::iterator i = start; i != end; ++i) {
1200                 (*i)->deactivate ();
1201         }
1202
1203         _session.set_dirty ();
1204 }
1205
1206 /** Turn off all redirects
1207  */
1208 void
1209 Route::disable_processors ()
1210 {
1211         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1212
1213         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1214                 (*i)->deactivate ();
1215         }
1216
1217         _session.set_dirty ();
1218 }
1219
1220 /** Turn off all redirects with a given placement
1221  * @param p Placement of redirects to disable
1222  */
1223 void
1224 Route::disable_plugins (Placement p)
1225 {
1226         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1227
1228         ProcessorList::iterator start, end;
1229         placement_range(p, start, end);
1230
1231         for (ProcessorList::iterator i = start; i != end; ++i) {
1232                 if (boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1233                         (*i)->deactivate ();
1234                 }
1235         }
1236
1237         _session.set_dirty ();
1238 }
1239
1240 /** Turn off all plugins
1241  */
1242 void
1243 Route::disable_plugins ()
1244 {
1245         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1246
1247         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1248                 if (boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1249                         (*i)->deactivate ();
1250                 }
1251         }
1252
1253         _session.set_dirty ();
1254 }
1255
1256
1257 void
1258 Route::ab_plugins (bool forward)
1259 {
1260         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1261
1262         if (forward) {
1263
1264                 /* forward = turn off all active redirects, and mark them so that the next time
1265                    we go the other way, we will revert them
1266                 */
1267
1268                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1269                         if (!boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1270                                 continue;
1271                         }
1272
1273                         if ((*i)->active()) {
1274                                 (*i)->deactivate ();
1275                                 (*i)->set_next_ab_is_active (true);
1276                         } else {
1277                                 (*i)->set_next_ab_is_active (false);
1278                         }
1279                 }
1280
1281         } else {
1282
1283                 /* backward = if the redirect was marked to go active on the next ab, do so */
1284
1285                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1286
1287                         if (!boost::dynamic_pointer_cast<PluginInsert> (*i)) {
1288                                 continue;
1289                         }
1290
1291                         if ((*i)->get_next_ab_is_active()) {
1292                                 (*i)->activate ();
1293                         } else {
1294                                 (*i)->deactivate ();
1295                         }
1296                 }
1297         }
1298
1299         _session.set_dirty ();
1300 }
1301
1302
1303 /** Remove processors with a given placement.
1304  * @param p Placement of processors to remove.
1305  */
1306 void
1307 Route::clear_processors (Placement p)
1308 {
1309         if (!_session.engine().connected()) {
1310                 return;
1311         }
1312
1313         bool already_deleting = _session.deletion_in_progress();
1314         if (!already_deleting) {
1315                 _session.set_deletion_in_progress();
1316         }
1317
1318         {
1319                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
1320                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1321                 ProcessorList new_list;
1322                 ProcessorStreams err;
1323                 bool seen_amp = false;
1324
1325                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1326
1327                         if (*i == _amp) {
1328                                 seen_amp = true;
1329                         }
1330
1331                         if ((*i) == _amp || (*i) == _meter || (*i) == _main_outs) {
1332
1333                                 /* you can't remove these */
1334
1335                                 new_list.push_back (*i);
1336
1337                         } else {
1338                                 if (seen_amp) {
1339
1340                                         switch (p) {
1341                                         case PreFader:
1342                                                 new_list.push_back (*i);
1343                                                 break;
1344                                         case PostFader:
1345                                                 (*i)->drop_references ();
1346                                                 break;
1347                                         }
1348
1349                                 } else {
1350
1351                                         switch (p) {
1352                                         case PreFader:
1353                                                 (*i)->drop_references ();
1354                                                 break;
1355                                         case PostFader:
1356                                                 new_list.push_back (*i);
1357                                                 break;
1358                                         }
1359                                 }
1360                         }
1361                 }
1362
1363                 _processors = new_list;
1364                 configure_processors_unlocked (&err); // this can't fail
1365         }
1366
1367         processor_max_streams.reset();
1368         _have_internal_generator = false;
1369         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1370         set_processor_positions ();
1371
1372         reset_instrument_info ();
1373
1374         if (!already_deleting) {
1375                 _session.clear_deletion_in_progress();
1376         }
1377 }
1378
1379 int
1380 Route::remove_processor (boost::shared_ptr<Processor> processor, ProcessorStreams* err, bool need_process_lock)
1381 {
1382         // TODO once the export point can be configured properly, do something smarter here
1383         if (processor == _capturing_processor) {
1384                 _capturing_processor.reset();
1385         }
1386
1387         /* these can never be removed */
1388
1389         if (processor == _amp || processor == _meter || processor == _main_outs) {
1390                 return 0;
1391         }
1392
1393         if (!_session.engine().connected()) {
1394                 return 1;
1395         }
1396
1397         processor_max_streams.reset();
1398
1399         {
1400                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock (), Glib::Threads::NOT_LOCK);
1401                 if (need_process_lock) {
1402                         lx.acquire();
1403                 }
1404                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1405                 ProcessorState pstate (this);
1406
1407                 ProcessorList::iterator i;
1408                 bool removed = false;
1409
1410                 for (i = _processors.begin(); i != _processors.end(); ) {
1411                         if (*i == processor) {
1412
1413                                 /* move along, see failure case for configure_processors()
1414                                    where we may need to reconfigure the processor.
1415                                 */
1416
1417                                 /* stop redirects that send signals to JACK ports
1418                                    from causing noise as a result of no longer being
1419                                    run.
1420                                 */
1421
1422                                 boost::shared_ptr<IOProcessor> iop;
1423
1424                                 if ((iop = boost::dynamic_pointer_cast<IOProcessor> (*i)) != 0) {
1425                                         iop->disconnect ();
1426                                 }
1427
1428                                 i = _processors.erase (i);
1429                                 removed = true;
1430                                 break;
1431
1432                         } else {
1433                                 ++i;
1434                         }
1435
1436                         _output->set_user_latency (0);
1437                 }
1438
1439                 if (!removed) {
1440                         /* what? */
1441                         return 1;
1442                 }
1443
1444                 if (configure_processors_unlocked (err)) {
1445                         pstate.restore ();
1446                         /* we know this will work, because it worked before :) */
1447                         configure_processors_unlocked (0);
1448                         return -1;
1449                 }
1450
1451                 _have_internal_generator = false;
1452
1453                 for (i = _processors.begin(); i != _processors.end(); ++i) {
1454                         boost::shared_ptr<PluginInsert> pi;
1455
1456                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
1457                                 if (pi->has_no_inputs ()) {
1458                                         _have_internal_generator = true;
1459                                         break;
1460                                 }
1461                         }
1462                 }
1463                 if (need_process_lock) {
1464                         lx.release();
1465                 }
1466         }
1467
1468         reset_instrument_info ();
1469         processor->drop_references ();
1470         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1471         set_processor_positions ();
1472
1473         return 0;
1474 }
1475
1476 int
1477 Route::remove_processors (const ProcessorList& to_be_deleted, ProcessorStreams* err)
1478 {
1479         ProcessorList deleted;
1480
1481         if (!_session.engine().connected()) {
1482                 return 1;
1483         }
1484
1485         processor_max_streams.reset();
1486
1487         {
1488                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
1489                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1490                 ProcessorState pstate (this);
1491
1492                 ProcessorList::iterator i;
1493                 boost::shared_ptr<Processor> processor;
1494
1495                 for (i = _processors.begin(); i != _processors.end(); ) {
1496
1497                         processor = *i;
1498
1499                         /* these can never be removed */
1500
1501                         if (processor == _amp || processor == _meter || processor == _main_outs) {
1502                                 ++i;
1503                                 continue;
1504                         }
1505
1506                         /* see if its in the list of processors to delete */
1507
1508                         if (find (to_be_deleted.begin(), to_be_deleted.end(), processor) == to_be_deleted.end()) {
1509                                 ++i;
1510                                 continue;
1511                         }
1512
1513                         /* stop IOProcessors that send to JACK ports
1514                            from causing noise as a result of no longer being
1515                            run.
1516                         */
1517
1518                         boost::shared_ptr<IOProcessor> iop;
1519
1520                         if ((iop = boost::dynamic_pointer_cast<IOProcessor> (processor)) != 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)) {
1536                         pstate.restore ();
1537                         /* we know this will work, because it worked before :) */
1538                         configure_processors_unlocked (0);
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 #if 0
1571 /* currently unused (again) -- but will come in handy soon (again)
1572  * once there is an option to link route + delivery panner settings
1573  */
1574 void
1575 Route::set_custom_panner_uri (std::string const panner_uri)
1576 {
1577         if (_in_configure_processors) {
1578                 DEBUG_TRACE (DEBUG::Panning, string_compose (_("Route::set_custom_panner_uri '%1' -- called while in_configure_processors\n"), name()));
1579                 return;
1580         }
1581
1582         if (!_main_outs->panner_shell()->set_user_selected_panner_uri(panner_uri)) {
1583                 DEBUG_TRACE (DEBUG::Panning, string_compose (_("Route::set_custom_panner_uri '%1 '%2' -- no change needed\n"), name(), panner_uri));
1584                 /* no change needed */
1585                 return;
1586         }
1587
1588         DEBUG_TRACE (DEBUG::Panning, string_compose (_("Route::set_custom_panner_uri '%1 '%2' -- reconfigure I/O\n"), name(), panner_uri));
1589
1590         /* reconfigure I/O -- re-initialize panner modules */
1591         {
1592                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
1593                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1594
1595                 for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p) {
1596                         boost::shared_ptr<Delivery> dl;
1597                         boost::shared_ptr<Panner> panner;
1598                         if ((dl = boost::dynamic_pointer_cast<Delivery> (*p)) == 0) {
1599                                 continue;
1600                         }
1601                         if (!dl->panner_shell()) {
1602                                 continue;
1603                         }
1604                         if (!(panner = dl->panner_shell()->panner())) {
1605                                 continue;
1606                         }
1607                         /* _main_outs has already been set before the loop.
1608                          * Ignore the return status here. It need reconfiguration */
1609                         if (dl->panner_shell() != _main_outs->panner_shell()) {
1610                                 if (!dl->panner_shell()->set_user_selected_panner_uri(panner_uri)) {
1611                                         continue;
1612                                 }
1613                         }
1614
1615                         ChanCount in = panner->in();
1616                         ChanCount out = panner->out();
1617                         dl->panner_shell()->configure_io(in, out);
1618                         dl->panner_shell()->pannable()->set_panner(dl->panner_shell()->panner());
1619                 }
1620         }
1621
1622         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1623         _session.set_dirty ();
1624 }
1625 #endif
1626
1627 void
1628 Route::reset_instrument_info ()
1629 {
1630         boost::shared_ptr<Processor> instr = the_instrument();
1631         if (instr) {
1632                 _instrument_info.set_internal_instrument (instr);
1633         }
1634 }
1635
1636 /** Caller must hold process lock */
1637 int
1638 Route::configure_processors (ProcessorStreams* err)
1639 {
1640         assert (!AudioEngine::instance()->process_lock().trylock());
1641         if (!_in_configure_processors) {
1642                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1643                 return configure_processors_unlocked (err);
1644         }
1645
1646         return 0;
1647 }
1648
1649 ChanCount
1650 Route::input_streams () const
1651 {
1652         return _input->n_ports ();
1653 }
1654
1655 list<pair<ChanCount, ChanCount> >
1656 Route::try_configure_processors (ChanCount in, ProcessorStreams* err)
1657 {
1658         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1659
1660         return try_configure_processors_unlocked (in, err);
1661 }
1662
1663 list<pair<ChanCount, ChanCount> >
1664 Route::try_configure_processors_unlocked (ChanCount in, ProcessorStreams* err)
1665 {
1666         // Check each processor in order to see if we can configure as requested
1667         ChanCount out;
1668         list<pair<ChanCount, ChanCount> > configuration;
1669         uint32_t index = 0;
1670
1671         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: configure processors\n", _name));
1672         DEBUG_TRACE (DEBUG::Processors, "{\n");
1673
1674         for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p, ++index) {
1675
1676                 if (boost::dynamic_pointer_cast<UnknownProcessor> (*p)) {
1677                         DEBUG_TRACE (DEBUG::Processors, "--- CONFIGURE ABORTED due to unknown processor.\n");
1678                         DEBUG_TRACE (DEBUG::Processors, "}\n");
1679                         return list<pair<ChanCount, ChanCount> > ();
1680                 }
1681
1682                 if ((*p)->can_support_io_configuration(in, out)) {
1683                         DEBUG_TRACE (DEBUG::Processors, string_compose ("\t%1 ID=%2 in=%3 out=%4\n",(*p)->name(), (*p)->id(), in, out));
1684                         configuration.push_back(make_pair(in, out));
1685                         in = out;
1686                 } else {
1687                         if (err) {
1688                                 err->index = index;
1689                                 err->count = in;
1690                         }
1691                         DEBUG_TRACE (DEBUG::Processors, "---- CONFIGURATION FAILED.\n");
1692                         DEBUG_TRACE (DEBUG::Processors, string_compose ("---- %1 cannot support in=%2 out=%3\n", (*p)->name(), in, out));
1693                         DEBUG_TRACE (DEBUG::Processors, "}\n");
1694                         return list<pair<ChanCount, ChanCount> > ();
1695                 }
1696         }
1697
1698         DEBUG_TRACE (DEBUG::Processors, "}\n");
1699
1700         return configuration;
1701 }
1702
1703 /** Set the input/output configuration of each processor in the processors list.
1704  *  Caller must hold process lock.
1705  *  Return 0 on success, otherwise configuration is impossible.
1706  */
1707 int
1708 Route::configure_processors_unlocked (ProcessorStreams* err)
1709 {
1710         assert (!AudioEngine::instance()->process_lock().trylock());
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         list< pair<ChanCount,ChanCount> >::iterator c = configuration.begin();
1734         for (ProcessorList::iterator p = _processors.begin(); p != _processors.end(); ++p, ++c) {
1735
1736                 if (boost::dynamic_pointer_cast<UnknownProcessor> (*p)) {
1737                         break;
1738                 }
1739
1740                 (*p)->configure_io(c->first, c->second);
1741                 processor_max_streams = ChanCount::max(processor_max_streams, c->first);
1742                 processor_max_streams = ChanCount::max(processor_max_streams, c->second);
1743                 out = c->second;
1744
1745                 if (boost::dynamic_pointer_cast<Delivery> (*p)
1746                                 && boost::dynamic_pointer_cast<Delivery> (*p)->role() == Delivery::Main) {
1747                         /* main delivery will increase port count to match input.
1748                          * the Delivery::Main is usually the last processor - followed only by
1749                          * 'MeterOutput'.
1750                          */
1751                         seen_mains_out = true;
1752                 }
1753                 if (!seen_mains_out) {
1754                         processor_out_streams = out;
1755                 }
1756         }
1757
1758
1759         if (_meter) {
1760                 _meter->reset_max_channels (processor_max_streams);
1761         }
1762
1763         /* make sure we have sufficient scratch buffers to cope with the new processor
1764            configuration
1765         */
1766         _session.ensure_buffers (n_process_buffers ());
1767
1768         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: configuration complete\n", _name));
1769
1770         _in_configure_processors = false;
1771         return 0;
1772 }
1773
1774 /** Set all visible processors to a given active state (except Fader, whose state is not changed)
1775  *  @param state New active state for those processors.
1776  */
1777 void
1778 Route::all_visible_processors_active (bool state)
1779 {
1780         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
1781
1782         if (_processors.empty()) {
1783                 return;
1784         }
1785
1786         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
1787                 if (!(*i)->display_to_user() || boost::dynamic_pointer_cast<Amp> (*i)) {
1788                         continue;
1789                 }
1790
1791                 if (state) {
1792                         (*i)->activate ();
1793                 } else {
1794                         (*i)->deactivate ();
1795                 }
1796         }
1797
1798         _session.set_dirty ();
1799 }
1800
1801 int
1802 Route::reorder_processors (const ProcessorList& new_order, ProcessorStreams* err)
1803 {
1804         /* "new_order" is an ordered list of processors to be positioned according to "placement".
1805            NOTE: all processors in "new_order" MUST be marked as display_to_user(). There maybe additional
1806            processors in the current actual processor list that are hidden. Any visible processors
1807            in the current list but not in "new_order" will be assumed to be deleted.
1808         */
1809
1810         {
1811                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
1812                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
1813                 ProcessorState pstate (this);
1814
1815                 ProcessorList::iterator oiter;
1816                 ProcessorList::const_iterator niter;
1817                 ProcessorList as_it_will_be;
1818
1819                 oiter = _processors.begin();
1820                 niter = new_order.begin();
1821
1822                 while (niter !=  new_order.end()) {
1823
1824                         /* if the next processor in the old list is invisible (i.e. should not be in the new order)
1825                            then append it to the temp list.
1826
1827                            Otherwise, see if the next processor in the old list is in the new list. if not,
1828                            its been deleted. If its there, append it to the temp list.
1829                         */
1830
1831                         if (oiter == _processors.end()) {
1832
1833                                 /* no more elements in the old list, so just stick the rest of
1834                                    the new order onto the temp list.
1835                                 */
1836
1837                                 as_it_will_be.insert (as_it_will_be.end(), niter, new_order.end());
1838                                 while (niter != new_order.end()) {
1839                                         ++niter;
1840                                 }
1841                                 break;
1842
1843                         } else {
1844
1845                                 if (!(*oiter)->display_to_user()) {
1846
1847                                         as_it_will_be.push_back (*oiter);
1848
1849                                 } else {
1850
1851                                         /* visible processor: check that its in the new order */
1852
1853                                         if (find (new_order.begin(), new_order.end(), (*oiter)) == new_order.end()) {
1854                                                 /* deleted: do nothing, shared_ptr<> will clean up */
1855                                         } else {
1856                                                 /* ignore this one, and add the next item from the new order instead */
1857                                                 as_it_will_be.push_back (*niter);
1858                                                 ++niter;
1859                                         }
1860                                 }
1861
1862                                 /* now remove from old order - its taken care of no matter what */
1863                                 oiter = _processors.erase (oiter);
1864                         }
1865
1866                 }
1867
1868                 _processors.insert (oiter, as_it_will_be.begin(), as_it_will_be.end());
1869
1870                 /* If the meter is in a custom position, find it and make a rough note of its position */
1871                 maybe_note_meter_position ();
1872
1873                 if (configure_processors_unlocked (err)) {
1874                         pstate.restore ();
1875                         return -1;
1876                 }
1877         }
1878
1879         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
1880         set_processor_positions ();
1881
1882         return 0;
1883 }
1884
1885 XMLNode&
1886 Route::get_state()
1887 {
1888         return state(true);
1889 }
1890
1891 XMLNode&
1892 Route::get_template()
1893 {
1894         return state(false);
1895 }
1896
1897 XMLNode&
1898 Route::state(bool full_state)
1899 {
1900         XMLNode *node = new XMLNode("Route");
1901         ProcessorList::iterator i;
1902         char buf[32];
1903
1904         id().print (buf, sizeof (buf));
1905         node->add_property("id", buf);
1906         node->add_property ("name", _name);
1907         node->add_property("default-type", _default_type.to_string());
1908
1909         if (_flags) {
1910                 node->add_property("flags", enum_2_string (_flags));
1911         }
1912
1913         node->add_property("active", _active?"yes":"no");
1914         string p;
1915         boost::to_string (_phase_invert, p);
1916         node->add_property("phase-invert", p);
1917         node->add_property("denormal-protection", _denormal_protection?"yes":"no");
1918         node->add_property("meter-point", enum_2_string (_meter_point));
1919
1920         node->add_property("meter-type", enum_2_string (_meter_type));
1921
1922         if (_route_group) {
1923                 node->add_property("route-group", _route_group->name());
1924         }
1925
1926         snprintf (buf, sizeof (buf), "%d", _order_key);
1927         node->add_property ("order-key", buf);
1928         node->add_property ("self-solo", (_self_solo ? "yes" : "no"));
1929         snprintf (buf, sizeof (buf), "%d", _soloed_by_others_upstream);
1930         node->add_property ("soloed-by-upstream", buf);
1931         snprintf (buf, sizeof (buf), "%d", _soloed_by_others_downstream);
1932         node->add_property ("soloed-by-downstream", buf);
1933         node->add_property ("solo-isolated", solo_isolated() ? "yes" : "no");
1934         node->add_property ("solo-safe", _solo_safe ? "yes" : "no");
1935
1936         node->add_child_nocopy (_input->state (full_state));
1937         node->add_child_nocopy (_output->state (full_state));
1938         node->add_child_nocopy (_solo_control->get_state ());
1939         node->add_child_nocopy (_mute_control->get_state ());
1940         node->add_child_nocopy (_mute_master->get_state ());
1941
1942         XMLNode* remote_control_node = new XMLNode (X_("RemoteControl"));
1943         snprintf (buf, sizeof (buf), "%d", _remote_control_id);
1944         remote_control_node->add_property (X_("id"), buf);
1945         node->add_child_nocopy (*remote_control_node);
1946
1947         if (_comment.length()) {
1948                 XMLNode *cmt = node->add_child ("Comment");
1949                 cmt->add_content (_comment);
1950         }
1951
1952         if (_pannable) {
1953                 node->add_child_nocopy (_pannable->state (full_state));
1954         }
1955
1956         for (i = _processors.begin(); i != _processors.end(); ++i) {
1957                 if (!full_state) {
1958                         /* template save: do not include internal sends functioning as
1959                            aux sends because the chance of the target ID
1960                            in the session where this template is used
1961                            is not very likely.
1962
1963                            similarly, do not save listen sends which connect to
1964                            the monitor section, because these will always be
1965                            added if necessary.
1966                         */
1967                         boost::shared_ptr<InternalSend> is;
1968
1969                         if ((is = boost::dynamic_pointer_cast<InternalSend> (*i)) != 0) {
1970                                 if (is->role() == Delivery::Listen) {
1971                                         continue;
1972                                 }
1973                         }
1974                 }
1975                 node->add_child_nocopy((*i)->state (full_state));
1976         }
1977
1978         if (_extra_xml) {
1979                 node->add_child_copy (*_extra_xml);
1980         }
1981
1982         if (_custom_meter_position_noted) {
1983                 boost::shared_ptr<Processor> after = _processor_after_last_custom_meter.lock ();
1984                 if (after) {
1985                         after->id().print (buf, sizeof (buf));
1986                         node->add_property (X_("processor-after-last-custom-meter"), buf);
1987                 }
1988
1989                 node->add_property (X_("last-custom-meter-was-at-end"), _last_custom_meter_was_at_end ? "yes" : "no");
1990         }
1991
1992         return *node;
1993 }
1994
1995 int
1996 Route::set_state (const XMLNode& node, int version)
1997 {
1998         if (version < 3000) {
1999                 return set_state_2X (node, version);
2000         }
2001
2002         XMLNodeList nlist;
2003         XMLNodeConstIterator niter;
2004         XMLNode *child;
2005         const XMLProperty *prop;
2006
2007         if (node.name() != "Route"){
2008                 error << string_compose(_("Bad node sent to Route::set_state() [%1]"), node.name()) << endmsg;
2009                 return -1;
2010         }
2011
2012         if ((prop = node.property (X_("name"))) != 0) {
2013                 Route::set_name (prop->value());
2014         }
2015
2016         set_id (node);
2017         _initial_io_setup = true;
2018
2019         if ((prop = node.property (X_("flags"))) != 0) {
2020                 _flags = Flag (string_2_enum (prop->value(), _flags));
2021         } else {
2022                 _flags = Flag (0);
2023         }
2024
2025         if (is_master() || is_monitor() || is_auditioner()) {
2026                 _mute_master->set_solo_ignore (true);
2027         }
2028
2029         if (is_monitor()) {
2030                 /* monitor bus does not get a panner, but if (re)created
2031                    via XML, it will already have one by the time we
2032                    call ::set_state(). so ... remove it.
2033                 */
2034                 unpan ();
2035         }
2036
2037         /* add all processors (except amp, which is always present) */
2038
2039         nlist = node.children();
2040         XMLNode processor_state (X_("processor_state"));
2041
2042         Stateful::save_extra_xml (node);
2043
2044         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2045
2046                 child = *niter;
2047
2048                 if (child->name() == IO::state_node_name) {
2049                         if ((prop = child->property (X_("direction"))) == 0) {
2050                                 continue;
2051                         }
2052
2053                         if (prop->value() == "Input") {
2054                                 _input->set_state (*child, version);
2055                         } else if (prop->value() == "Output") {
2056                                 _output->set_state (*child, version);
2057                         }
2058                 }
2059
2060                 if (child->name() == X_("Processor")) {
2061                         processor_state.add_child_copy (*child);
2062                 }
2063
2064                 if (child->name() == X_("Pannable")) {
2065                         if (_pannable) {
2066                                 _pannable->set_state (*child, version);
2067                         } else {
2068                                 warning << string_compose (_("Pannable state found for route (%1) without a panner!"), name()) << endmsg;
2069                         }
2070                 }
2071         }
2072
2073         if ((prop = node.property (X_("meter-point"))) != 0) {
2074                 MeterPoint mp = MeterPoint (string_2_enum (prop->value (), _meter_point));
2075                 set_meter_point (mp, true);
2076                 if (_meter) {
2077                         _meter->set_display_to_user (_meter_point == MeterCustom);
2078                 }
2079         }
2080
2081         if ((prop = node.property (X_("meter-type"))) != 0) {
2082                 _meter_type = MeterType (string_2_enum (prop->value (), _meter_type));
2083         }
2084
2085         _initial_io_setup = false;
2086
2087         set_processor_state (processor_state);
2088
2089         // this looks up the internal instrument in processors
2090         reset_instrument_info();
2091
2092         if ((prop = node.property ("self-solo")) != 0) {
2093                 set_self_solo (string_is_affirmative (prop->value()));
2094         }
2095
2096         if ((prop = node.property ("soloed-by-upstream")) != 0) {
2097                 _soloed_by_others_upstream = 0; // needed for mod_.... () to work
2098                 mod_solo_by_others_upstream (atoi (prop->value()));
2099         }
2100
2101         if ((prop = node.property ("soloed-by-downstream")) != 0) {
2102                 _soloed_by_others_downstream = 0; // needed for mod_.... () to work
2103                 mod_solo_by_others_downstream (atoi (prop->value()));
2104         }
2105
2106         if ((prop = node.property ("solo-isolated")) != 0) {
2107                 set_solo_isolated (string_is_affirmative (prop->value()), this);
2108         }
2109
2110         if ((prop = node.property ("solo-safe")) != 0) {
2111                 set_solo_safe (string_is_affirmative (prop->value()), this);
2112         }
2113
2114         if ((prop = node.property (X_("phase-invert"))) != 0) {
2115                 set_phase_invert (boost::dynamic_bitset<> (prop->value ()));
2116         }
2117
2118         if ((prop = node.property (X_("denormal-protection"))) != 0) {
2119                 set_denormal_protection (string_is_affirmative (prop->value()));
2120         }
2121
2122         if ((prop = node.property (X_("active"))) != 0) {
2123                 bool yn = string_is_affirmative (prop->value());
2124                 _active = !yn; // force switch
2125                 set_active (yn, this);
2126         }
2127
2128         if ((prop = node.property (X_("order-key"))) != 0) { // New order key (no separate mixer/editor ordering)
2129                 set_order_key (atoi(prop->value()));
2130         }
2131
2132         if ((prop = node.property (X_("order-keys"))) != 0) { // Deprecated order keys
2133
2134                 int32_t n;
2135
2136                 string::size_type colon, equal;
2137                 string remaining = prop->value();
2138
2139                 while (remaining.length()) {
2140
2141                         if ((equal = remaining.find_first_of ('=')) == string::npos || equal == remaining.length()) {
2142                                 error << string_compose (_("badly formed order key string in state file! [%1] ... ignored."), remaining)
2143                                       << endmsg;
2144                         } else {
2145                                 if (sscanf (remaining.substr (equal+1).c_str(), "%d", &n) != 1) {
2146                                         error << string_compose (_("badly formed order key string in state file! [%1] ... ignored."), remaining)
2147                                               << endmsg;
2148                                 } else {
2149                                         string keyname = remaining.substr (0, equal);
2150
2151                                         if ((keyname == "EditorSort") || (keyname == "editor")) {
2152                                                 cerr << "Setting " << name() << " order key to " << n << " using saved Editor order." << endl;
2153                                                 set_order_key (n);
2154                                         }
2155                                 }
2156                         }
2157
2158                         colon = remaining.find_first_of (':');
2159
2160                         if (colon != string::npos) {
2161                                 remaining = remaining.substr (colon+1);
2162                         } else {
2163                                 break;
2164                         }
2165                 }
2166         }
2167
2168         if ((prop = node.property (X_("processor-after-last-custom-meter"))) != 0) {
2169                 PBD::ID id (prop->value ());
2170                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2171                 ProcessorList::const_iterator i = _processors.begin ();
2172                 while (i != _processors.end() && (*i)->id() != id) {
2173                         ++i;
2174                 }
2175
2176                 if (i != _processors.end ()) {
2177                         _processor_after_last_custom_meter = *i;
2178                         _custom_meter_position_noted = true;
2179                 }
2180         }
2181
2182         if ((prop = node.property (X_("last-custom-meter-was-at-end"))) != 0) {
2183                 _last_custom_meter_was_at_end = string_is_affirmative (prop->value ());
2184         }
2185
2186         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2187                 child = *niter;
2188
2189                 if (child->name() == X_("Comment")) {
2190
2191                         /* XXX this is a terrible API design in libxml++ */
2192
2193                         XMLNode *cmt = *(child->children().begin());
2194                         _comment = cmt->content();
2195
2196                 } else if (child->name() == Controllable::xml_node_name && (prop = child->property("name")) != 0) {
2197                         if (prop->value() == "solo") {
2198                                 _solo_control->set_state (*child, version);
2199                         } else if (prop->value() == "mute") {
2200                                 _mute_control->set_state (*child, version);
2201                         }
2202
2203                 } else if (child->name() == X_("RemoteControl")) {
2204                         if ((prop = child->property (X_("id"))) != 0) {
2205                                 int32_t x;
2206                                 sscanf (prop->value().c_str(), "%d", &x);
2207                                 set_remote_control_id_internal (x);
2208                         }
2209
2210                 } else if (child->name() == X_("MuteMaster")) {
2211                         _mute_master->set_state (*child, version);
2212                 }
2213         }
2214
2215         return 0;
2216 }
2217
2218 int
2219 Route::set_state_2X (const XMLNode& node, int version)
2220 {
2221         XMLNodeList nlist;
2222         XMLNodeConstIterator niter;
2223         XMLNode *child;
2224         const XMLProperty *prop;
2225
2226         /* 2X things which still remain to be handled:
2227          * default-type
2228          * automation
2229          * controlouts
2230          */
2231
2232         if (node.name() != "Route") {
2233                 error << string_compose(_("Bad node sent to Route::set_state() [%1]"), node.name()) << endmsg;
2234                 return -1;
2235         }
2236
2237         if ((prop = node.property (X_("flags"))) != 0) {
2238                 string f = prop->value ();
2239                 boost::replace_all (f, "ControlOut", "MonitorOut");
2240                 _flags = Flag (string_2_enum (f, _flags));
2241         } else {
2242                 _flags = Flag (0);
2243         }
2244
2245         if (is_master() || is_monitor() || is_auditioner()) {
2246                 _mute_master->set_solo_ignore (true);
2247         }
2248
2249         if ((prop = node.property (X_("phase-invert"))) != 0) {
2250                 boost::dynamic_bitset<> p (_input->n_ports().n_audio ());
2251                 if (string_is_affirmative (prop->value ())) {
2252                         p.set ();
2253                 }
2254                 set_phase_invert (p);
2255         }
2256
2257         if ((prop = node.property (X_("denormal-protection"))) != 0) {
2258                 set_denormal_protection (string_is_affirmative (prop->value()));
2259         }
2260
2261         if ((prop = node.property (X_("soloed"))) != 0) {
2262                 bool yn = string_is_affirmative (prop->value());
2263
2264                 /* XXX force reset of solo status */
2265
2266                 set_solo (yn, this);
2267         }
2268
2269         if ((prop = node.property (X_("muted"))) != 0) {
2270
2271                 bool first = true;
2272                 bool muted = string_is_affirmative (prop->value());
2273
2274                 if (muted) {
2275
2276                         string mute_point;
2277
2278                         if ((prop = node.property (X_("mute-affects-pre-fader"))) != 0) {
2279
2280                                 if (string_is_affirmative (prop->value())){
2281                                         mute_point = mute_point + "PreFader";
2282                                         first = false;
2283                                 }
2284                         }
2285
2286                         if ((prop = node.property (X_("mute-affects-post-fader"))) != 0) {
2287
2288                                 if (string_is_affirmative (prop->value())){
2289
2290                                         if (!first) {
2291                                                 mute_point = mute_point + ",";
2292                                         }
2293
2294                                         mute_point = mute_point + "PostFader";
2295                                         first = false;
2296                                 }
2297                         }
2298
2299                         if ((prop = node.property (X_("mute-affects-control-outs"))) != 0) {
2300
2301                                 if (string_is_affirmative (prop->value())){
2302
2303                                         if (!first) {
2304                                                 mute_point = mute_point + ",";
2305                                         }
2306
2307                                         mute_point = mute_point + "Listen";
2308                                         first = false;
2309                                 }
2310                         }
2311
2312                         if ((prop = node.property (X_("mute-affects-main-outs"))) != 0) {
2313
2314                                 if (string_is_affirmative (prop->value())){
2315
2316                                         if (!first) {
2317                                                 mute_point = mute_point + ",";
2318                                         }
2319
2320                                         mute_point = mute_point + "Main";
2321                                 }
2322                         }
2323
2324                         _mute_master->set_mute_points (mute_point);
2325                         _mute_master->set_muted_by_self (true);
2326                 }
2327         }
2328
2329         if ((prop = node.property (X_("meter-point"))) != 0) {
2330                 _meter_point = MeterPoint (string_2_enum (prop->value (), _meter_point));
2331         }
2332
2333         /* do not carry over edit/mix groups from 2.X because (a) its hard (b) they
2334            don't mean the same thing.
2335         */
2336
2337         if ((prop = node.property (X_("order-keys"))) != 0) {
2338
2339                 int32_t n;
2340
2341                 string::size_type colon, equal;
2342                 string remaining = prop->value();
2343
2344                 while (remaining.length()) {
2345
2346                         if ((equal = remaining.find_first_of ('=')) == string::npos || equal == remaining.length()) {
2347                                 error << string_compose (_("badly formed order key string in state file! [%1] ... ignored."), remaining)
2348                                         << endmsg;
2349                         } else {
2350                                 if (sscanf (remaining.substr (equal+1).c_str(), "%d", &n) != 1) {
2351                                         error << string_compose (_("badly formed order key string in state file! [%1] ... ignored."), remaining)
2352                                                 << endmsg;
2353                                 } else {
2354                                         string keyname = remaining.substr (0, equal);
2355
2356                                         if (keyname == "EditorSort" || keyname == "editor") {
2357                                                 info << string_compose(_("Converting deprecated order key for %1 using Editor order %2"), name (), n) << endmsg;
2358                                                 set_order_key (n);
2359                                         }
2360                                 }
2361                         }
2362
2363                         colon = remaining.find_first_of (':');
2364
2365                         if (colon != string::npos) {
2366                                 remaining = remaining.substr (colon+1);
2367                         } else {
2368                                 break;
2369                         }
2370                 }
2371         }
2372
2373         /* IOs */
2374
2375         nlist = node.children ();
2376         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2377
2378                 child = *niter;
2379
2380                 if (child->name() == IO::state_node_name) {
2381
2382                         /* there is a note in IO::set_state_2X() about why we have to call
2383                            this directly.
2384                            */
2385
2386                         _input->set_state_2X (*child, version, true);
2387                         _output->set_state_2X (*child, version, false);
2388
2389                         if ((prop = child->property (X_("name"))) != 0) {
2390                                 Route::set_name (prop->value ());
2391                         }
2392
2393                         set_id (*child);
2394
2395                         if ((prop = child->property (X_("active"))) != 0) {
2396                                 bool yn = string_is_affirmative (prop->value());
2397                                 _active = !yn; // force switch
2398                                 set_active (yn, this);
2399                         }
2400
2401                         if ((prop = child->property (X_("gain"))) != 0) {
2402                                 gain_t val;
2403
2404                                 if (sscanf (prop->value().c_str(), "%f", &val) == 1) {
2405                                         _amp->gain_control()->set_value (val);
2406                                 }
2407                         }
2408
2409                         /* Set up Panners in the IO */
2410                         XMLNodeList io_nlist = child->children ();
2411
2412                         XMLNodeConstIterator io_niter;
2413                         XMLNode *io_child;
2414
2415                         for (io_niter = io_nlist.begin(); io_niter != io_nlist.end(); ++io_niter) {
2416
2417                                 io_child = *io_niter;
2418
2419                                 if (io_child->name() == X_("Panner")) {
2420                                         _main_outs->panner_shell()->set_state(*io_child, version);
2421                                 } else if (io_child->name() == X_("Automation")) {
2422                                         /* IO's automation is for the fader */
2423                                         _amp->set_automation_xml_state (*io_child, Evoral::Parameter (GainAutomation));
2424                                 }
2425                         }
2426                 }
2427         }
2428
2429         XMLNodeList redirect_nodes;
2430
2431         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2432
2433                 child = *niter;
2434
2435                 if (child->name() == X_("Send") || child->name() == X_("Insert")) {
2436                         redirect_nodes.push_back(child);
2437                 }
2438
2439         }
2440
2441         set_processor_state_2X (redirect_nodes, version);
2442
2443         Stateful::save_extra_xml (node);
2444
2445         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
2446                 child = *niter;
2447
2448                 if (child->name() == X_("Comment")) {
2449
2450                         /* XXX this is a terrible API design in libxml++ */
2451
2452                         XMLNode *cmt = *(child->children().begin());
2453                         _comment = cmt->content();
2454
2455                 } else if (child->name() == Controllable::xml_node_name && (prop = child->property("name")) != 0) {
2456                         if (prop->value() == X_("solo")) {
2457                                 _solo_control->set_state (*child, version);
2458                         } else if (prop->value() == X_("mute")) {
2459                                 _mute_control->set_state (*child, version);
2460                         }
2461
2462                 } else if (child->name() == X_("RemoteControl")) {
2463                         if ((prop = child->property (X_("id"))) != 0) {
2464                                 int32_t x;
2465                                 sscanf (prop->value().c_str(), "%d", &x);
2466                                 set_remote_control_id_internal (x);
2467                         }
2468
2469                 }
2470         }
2471
2472         return 0;
2473 }
2474
2475 XMLNode&
2476 Route::get_processor_state ()
2477 {
2478         XMLNode* root = new XMLNode (X_("redirects"));
2479         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
2480                 root->add_child_nocopy ((*i)->state (true));
2481         }
2482
2483         return *root;
2484 }
2485
2486 void
2487 Route::set_processor_state_2X (XMLNodeList const & nList, int version)
2488 {
2489         /* We don't bother removing existing processors not in nList, as this
2490            method will only be called when creating a Route from scratch, not
2491            for undo purposes.  Just put processors in at the appropriate place
2492            in the list.
2493         */
2494
2495         for (XMLNodeConstIterator i = nList.begin(); i != nList.end(); ++i) {
2496                 add_processor_from_xml_2X (**i, version);
2497         }
2498 }
2499
2500 void
2501 Route::set_processor_state (const XMLNode& node)
2502 {
2503         const XMLNodeList &nlist = node.children();
2504         XMLNodeConstIterator niter;
2505         ProcessorList new_order;
2506         bool must_configure = false;
2507
2508         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2509
2510                 XMLProperty* prop = (*niter)->property ("type");
2511
2512                 if (prop->value() == "amp") {
2513                         _amp->set_state (**niter, Stateful::current_state_version);
2514                         new_order.push_back (_amp);
2515                 } else if (prop->value() == "meter") {
2516                         _meter->set_state (**niter, Stateful::current_state_version);
2517                         new_order.push_back (_meter);
2518                 } else if (prop->value() == "main-outs") {
2519                         _main_outs->set_state (**niter, Stateful::current_state_version);
2520                 } else if (prop->value() == "intreturn") {
2521                         if (!_intreturn) {
2522                                 _intreturn.reset (new InternalReturn (_session));
2523                                 must_configure = true;
2524                         }
2525                         _intreturn->set_state (**niter, Stateful::current_state_version);
2526                 } else if (is_monitor() && prop->value() == "monitor") {
2527                         if (!_monitor_control) {
2528                                 _monitor_control.reset (new MonitorProcessor (_session));
2529                                 must_configure = true;
2530                         }
2531                         _monitor_control->set_state (**niter, Stateful::current_state_version);
2532                 } else if (prop->value() == "capture") {
2533                         /* CapturingProcessor should never be restored, it's always
2534                            added explicitly when needed */
2535                 } else {
2536                         ProcessorList::iterator o;
2537
2538                         for (o = _processors.begin(); o != _processors.end(); ++o) {
2539                                 XMLProperty* id_prop = (*niter)->property(X_("id"));
2540                                 if (id_prop && (*o)->id() == id_prop->value()) {
2541                                         (*o)->set_state (**niter, Stateful::current_state_version);
2542                                         new_order.push_back (*o);
2543                                         break;
2544                                 }
2545                         }
2546
2547                         // If the processor (*niter) is not on the route then create it
2548
2549                         if (o == _processors.end()) {
2550
2551                                 boost::shared_ptr<Processor> processor;
2552
2553                                 if (prop->value() == "intsend") {
2554
2555                                         processor.reset (new InternalSend (_session, _pannable, _mute_master, boost::shared_ptr<Route>(), Delivery::Aux));
2556
2557                                 } else if (prop->value() == "ladspa" || prop->value() == "Ladspa" ||
2558                                            prop->value() == "lv2" ||
2559                                            prop->value() == "windows-vst" ||
2560                                            prop->value() == "lxvst" ||
2561                                            prop->value() == "audiounit") {
2562
2563                                         processor.reset (new PluginInsert(_session));
2564
2565                                 } else if (prop->value() == "port") {
2566
2567                                         processor.reset (new PortInsert (_session, _pannable, _mute_master));
2568
2569                                 } else if (prop->value() == "send") {
2570
2571                                         processor.reset (new Send (_session, _pannable, _mute_master));
2572
2573                                 } else {
2574                                         error << string_compose(_("unknown Processor type \"%1\"; ignored"), prop->value()) << endmsg;
2575                                         continue;
2576                                 }
2577
2578                                 if (processor->set_state (**niter, Stateful::current_state_version) != 0) {
2579                                         /* This processor could not be configured.  Turn it into a UnknownProcessor */
2580                                         processor.reset (new UnknownProcessor (_session, **niter));
2581                                 }
2582
2583                                 /* we have to note the monitor send here, otherwise a new one will be created
2584                                    and the state of this one will be lost.
2585                                 */
2586                                 boost::shared_ptr<InternalSend> isend = boost::dynamic_pointer_cast<InternalSend> (processor);
2587                                 if (isend && isend->role() == Delivery::Listen) {
2588                                         _monitor_send = isend;
2589                                 }
2590
2591                                 /* it doesn't matter if invisible processors are added here, as they
2592                                    will be sorted out by setup_invisible_processors () shortly.
2593                                 */
2594
2595                                 new_order.push_back (processor);
2596                                 must_configure = true;
2597                         }
2598                 }
2599         }
2600
2601         {
2602                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
2603                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
2604                 _processors = new_order;
2605
2606                 if (must_configure) {
2607                         configure_processors_unlocked (0);
2608                 }
2609
2610                 for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
2611
2612                         (*i)->set_owner (this);
2613                         (*i)->ActiveChanged.connect_same_thread (*this, boost::bind (&Session::update_latency_compensation, &_session, false));
2614
2615                         boost::shared_ptr<PluginInsert> pi;
2616
2617                         if ((pi = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
2618                                 if (pi->has_no_inputs ()) {
2619                                         _have_internal_generator = true;
2620                                         break;
2621                                 }
2622                         }
2623                 }
2624         }
2625
2626         reset_instrument_info ();
2627         processors_changed (RouteProcessorChange ());
2628         set_processor_positions ();
2629 }
2630
2631 void
2632 Route::curve_reallocate ()
2633 {
2634 //      _gain_automation_curve.finish_resize ();
2635 //      _pan_automation_curve.finish_resize ();
2636 }
2637
2638 void
2639 Route::silence (framecnt_t nframes)
2640 {
2641         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
2642         if (!lm.locked()) {
2643                 return;
2644         }
2645
2646         silence_unlocked (nframes);
2647 }
2648
2649 void
2650 Route::silence_unlocked (framecnt_t nframes)
2651 {
2652         /* Must be called with the processor lock held */
2653
2654         if (!_silent) {
2655
2656                 _output->silence (nframes);
2657
2658                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
2659                         boost::shared_ptr<PluginInsert> pi;
2660
2661                         if (!_active && (pi = boost::dynamic_pointer_cast<PluginInsert> (*i)) != 0) {
2662                                 // skip plugins, they don't need anything when we're not active
2663                                 continue;
2664                         }
2665
2666                         (*i)->silence (nframes);
2667                 }
2668
2669                 if (nframes == _session.get_block_size()) {
2670                         // _silent = true;
2671                 }
2672         }
2673 }
2674
2675 void
2676 Route::add_internal_return ()
2677 {
2678         if (!_intreturn) {
2679                 _intreturn.reset (new InternalReturn (_session));
2680                 add_processor (_intreturn, PreFader);
2681         }
2682 }
2683
2684 void
2685 Route::add_send_to_internal_return (InternalSend* send)
2686 {
2687         Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
2688
2689         for (ProcessorList::const_iterator x = _processors.begin(); x != _processors.end(); ++x) {
2690                 boost::shared_ptr<InternalReturn> d = boost::dynamic_pointer_cast<InternalReturn>(*x);
2691
2692                 if (d) {
2693                         return d->add_send (send);
2694                 }
2695         }
2696 }
2697
2698 void
2699 Route::remove_send_from_internal_return (InternalSend* send)
2700 {
2701         Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
2702
2703         for (ProcessorList::const_iterator x = _processors.begin(); x != _processors.end(); ++x) {
2704                 boost::shared_ptr<InternalReturn> d = boost::dynamic_pointer_cast<InternalReturn>(*x);
2705
2706                 if (d) {
2707                         return d->remove_send (send);
2708                 }
2709         }
2710 }
2711
2712 void
2713 Route::enable_monitor_send ()
2714 {
2715         /* Caller must hold process lock */
2716         assert (!AudioEngine::instance()->process_lock().trylock());
2717
2718         /* master never sends to monitor section via the normal mechanism */
2719         assert (!is_master ());
2720         assert (!is_monitor ());
2721
2722         /* make sure we have one */
2723         if (!_monitor_send) {
2724                 _monitor_send.reset (new InternalSend (_session, _pannable, _mute_master, _session.monitor_out(), Delivery::Listen));
2725                 _monitor_send->set_display_to_user (false);
2726         }
2727
2728         /* set it up */
2729         configure_processors (0);
2730 }
2731
2732 /** Add an aux send to a route.
2733  *  @param route route to send to.
2734  *  @param before Processor to insert before, or 0 to insert at the end.
2735  */
2736 int
2737 Route::add_aux_send (boost::shared_ptr<Route> route, boost::shared_ptr<Processor> before)
2738 {
2739         assert (route != _session.monitor_out ());
2740
2741         {
2742                 Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
2743
2744                 for (ProcessorList::iterator x = _processors.begin(); x != _processors.end(); ++x) {
2745
2746                         boost::shared_ptr<InternalSend> d = boost::dynamic_pointer_cast<InternalSend> (*x);
2747
2748                         if (d && d->target_route() == route) {
2749                                 /* already listening via the specified IO: do nothing */
2750                                 return 0;
2751                         }
2752                 }
2753         }
2754
2755         try {
2756
2757                 boost::shared_ptr<InternalSend> listener;
2758
2759                 {
2760                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
2761                         listener.reset (new InternalSend (_session, _pannable, _mute_master, route, Delivery::Aux));
2762                 }
2763
2764                 add_processor (listener, before);
2765
2766         } catch (failed_constructor& err) {
2767                 return -1;
2768         }
2769
2770         return 0;
2771 }
2772
2773 void
2774 Route::remove_aux_or_listen (boost::shared_ptr<Route> route)
2775 {
2776         ProcessorStreams err;
2777         ProcessorList::iterator tmp;
2778
2779         {
2780                 Glib::Threads::RWLock::ReaderLock rl(_processor_lock);
2781
2782                 /* have to do this early because otherwise processor reconfig
2783                  * will put _monitor_send back in the list
2784                  */
2785
2786                 if (route == _session.monitor_out()) {
2787                         _monitor_send.reset ();
2788                 }
2789
2790           again:
2791                 for (ProcessorList::iterator x = _processors.begin(); x != _processors.end(); ++x) {
2792
2793                         boost::shared_ptr<InternalSend> d = boost::dynamic_pointer_cast<InternalSend>(*x);
2794
2795                         if (d && d->target_route() == route) {
2796                                 rl.release ();
2797                                 remove_processor (*x, &err, false);
2798                                 rl.acquire ();
2799
2800                                 /* list could have been demolished while we dropped the lock
2801                                    so start over.
2802                                 */
2803
2804                                 goto again;
2805                         }
2806                 }
2807         }
2808 }
2809
2810 void
2811 Route::set_comment (string cmt, void *src)
2812 {
2813         _comment = cmt;
2814         comment_changed (src);
2815         _session.set_dirty ();
2816 }
2817
2818 bool
2819 Route::add_fed_by (boost::shared_ptr<Route> other, bool via_sends_only)
2820 {
2821         FeedRecord fr (other, via_sends_only);
2822
2823         pair<FedBy::iterator,bool> result =  _fed_by.insert (fr);
2824
2825         if (!result.second) {
2826
2827                 /* already a record for "other" - make sure sends-only information is correct */
2828                 if (!via_sends_only && result.first->sends_only) {
2829                         FeedRecord* frp = const_cast<FeedRecord*>(&(*result.first));
2830                         frp->sends_only = false;
2831                 }
2832         }
2833
2834         return result.second;
2835 }
2836
2837 void
2838 Route::clear_fed_by ()
2839 {
2840         _fed_by.clear ();
2841 }
2842
2843 bool
2844 Route::feeds (boost::shared_ptr<Route> other, bool* via_sends_only)
2845 {
2846         const FedBy& fed_by (other->fed_by());
2847
2848         for (FedBy::iterator f = fed_by.begin(); f != fed_by.end(); ++f) {
2849                 boost::shared_ptr<Route> sr = f->r.lock();
2850
2851                 if (sr && (sr.get() == this)) {
2852
2853                         if (via_sends_only) {
2854                                 *via_sends_only = f->sends_only;
2855                         }
2856
2857                         return true;
2858                 }
2859         }
2860
2861         return false;
2862 }
2863
2864 bool
2865 Route::direct_feeds_according_to_reality (boost::shared_ptr<Route> other, bool* via_send_only)
2866 {
2867         DEBUG_TRACE (DEBUG::Graph, string_compose ("Feeds? %1\n", _name));
2868
2869         if (_output->connected_to (other->input())) {
2870                 DEBUG_TRACE (DEBUG::Graph, string_compose ("\tdirect FEEDS %2\n", other->name()));
2871                 if (via_send_only) {
2872                         *via_send_only = false;
2873                 }
2874
2875                 return true;
2876         }
2877
2878
2879         for (ProcessorList::iterator r = _processors.begin(); r != _processors.end(); ++r) {
2880
2881                 boost::shared_ptr<IOProcessor> iop;
2882
2883                 if ((iop = boost::dynamic_pointer_cast<IOProcessor>(*r)) != 0) {
2884                         if (iop->feeds (other)) {
2885                                 DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tIOP %1 does feed %2\n", iop->name(), other->name()));
2886                                 if (via_send_only) {
2887                                         *via_send_only = true;
2888                                 }
2889                                 return true;
2890                         } else {
2891                                 DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tIOP %1 does NOT feed %2\n", iop->name(), other->name()));
2892                         }
2893                 } else {
2894                         DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tPROC %1 is not an IOP\n", (*r)->name()));
2895                 }
2896
2897         }
2898
2899         DEBUG_TRACE (DEBUG::Graph,  string_compose ("\tdoes NOT feed %1\n", other->name()));
2900         return false;
2901 }
2902
2903 bool
2904 Route::direct_feeds_according_to_graph (boost::shared_ptr<Route> other, bool* via_send_only)
2905 {
2906         return _session._current_route_graph.has (shared_from_this (), other, via_send_only);
2907 }
2908
2909 /** Called from the (non-realtime) butler thread when the transport is stopped */
2910 void
2911 Route::nonrealtime_handle_transport_stopped (bool /*abort_ignored*/, bool /*did_locate*/, bool can_flush_processors)
2912 {
2913         framepos_t now = _session.transport_frame();
2914
2915         {
2916                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
2917
2918                 Automatable::transport_stopped (now);
2919
2920                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
2921
2922                         if (!_have_internal_generator && (Config->get_plugins_stop_with_transport() && can_flush_processors)) {
2923                                 (*i)->flush ();
2924                         }
2925
2926                         (*i)->transport_stopped (now);
2927                 }
2928         }
2929
2930         _roll_delay = _initial_delay;
2931 }
2932
2933 void
2934 Route::input_change_handler (IOChange change, void * /*src*/)
2935 {
2936         bool need_to_queue_solo_change = true;
2937
2938         if ((change.type & IOChange::ConfigurationChanged)) {
2939                 /* This is called with the process lock held if change
2940                    contains ConfigurationChanged
2941                 */
2942                 need_to_queue_solo_change = false;
2943                 configure_processors (0);
2944                 _phase_invert.resize (_input->n_ports().n_audio ());
2945                 io_changed (); /* EMIT SIGNAL */
2946         }
2947
2948         if (!_input->connected() && _soloed_by_others_upstream) {
2949                 if (need_to_queue_solo_change) {
2950                         _session.cancel_solo_after_disconnect (shared_from_this(), true);
2951                 } else {
2952                         cancel_solo_after_disconnect (true);
2953                 }
2954         }
2955 }
2956
2957 void
2958 Route::output_change_handler (IOChange change, void * /*src*/)
2959 {
2960         bool need_to_queue_solo_change = true;
2961         if (_initial_io_setup) {
2962                 return;
2963         }
2964
2965         if ((change.type & IOChange::ConfigurationChanged)) {
2966                 /* This is called with the process lock held if change
2967                    contains ConfigurationChanged
2968                 */
2969                 need_to_queue_solo_change = false;
2970                 configure_processors (0);
2971                 io_changed (); /* EMIT SIGNAL */
2972         }
2973
2974         if (!_output->connected() && _soloed_by_others_downstream) {
2975                 if (need_to_queue_solo_change) {
2976                         _session.cancel_solo_after_disconnect (shared_from_this(), false);
2977                 } else {
2978                         cancel_solo_after_disconnect (false);
2979                 }
2980         }
2981 }
2982
2983 void
2984 Route::cancel_solo_after_disconnect (bool upstream)
2985 {
2986         if (upstream) {
2987                 _soloed_by_others_upstream = 0;
2988         } else {
2989                 _soloed_by_others_downstream = 0;
2990         }
2991         set_mute_master_solo ();
2992         solo_changed (false, this);
2993 }
2994
2995 uint32_t
2996 Route::pans_required () const
2997 {
2998         if (n_outputs().n_audio() < 2) {
2999                 return 0;
3000         }
3001
3002         return max (n_inputs ().n_audio(), processor_max_streams.n_audio());
3003 }
3004
3005 int
3006 Route::no_roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, bool session_state_changing)
3007 {
3008         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
3009
3010         if (!lm.locked()) {
3011                 return 0;
3012         }
3013
3014         if (n_outputs().n_total() == 0) {
3015                 return 0;
3016         }
3017
3018         if (!_active || n_inputs() == ChanCount::ZERO)  {
3019                 silence_unlocked (nframes);
3020                 return 0;
3021         }
3022
3023         if (session_state_changing) {
3024                 if (_session.transport_speed() != 0.0f) {
3025                         /* we're rolling but some state is changing (e.g. our diskstream contents)
3026                            so we cannot use them. Be silent till this is over.
3027
3028                            XXX note the absurdity of ::no_roll() being called when we ARE rolling!
3029                         */
3030                         silence_unlocked (nframes);
3031                         return 0;
3032                 }
3033                 /* we're really not rolling, so we're either delivery silence or actually
3034                    monitoring, both of which are safe to do while session_state_changing is true.
3035                 */
3036         }
3037
3038         BufferSet& bufs = _session.get_route_buffers (n_process_buffers());
3039
3040         fill_buffers_with_input (bufs, _input, nframes);
3041
3042         if (_meter_point == MeterInput) {
3043                 _meter->run (bufs, start_frame, end_frame, nframes, true);
3044         }
3045
3046         _amp->apply_gain_automation (false);
3047         passthru (bufs, start_frame, end_frame, nframes, 0);
3048
3049         return 0;
3050 }
3051
3052 int
3053 Route::roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, int declick, bool& /* need_butler */)
3054 {
3055         Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
3056         if (!lm.locked()) {
3057                 return 0;
3058         }
3059
3060         if (n_outputs().n_total() == 0) {
3061                 return 0;
3062         }
3063
3064         if (!_active || n_inputs().n_total() == 0) {
3065                 silence_unlocked (nframes);
3066                 return 0;
3067         }
3068
3069         framepos_t unused = 0;
3070
3071         if ((nframes = check_initial_delay (nframes, unused)) == 0) {
3072                 return 0;
3073         }
3074
3075         _silent = false;
3076
3077         BufferSet& bufs = _session.get_route_buffers (n_process_buffers());
3078
3079         fill_buffers_with_input (bufs, _input, nframes);
3080
3081         if (_meter_point == MeterInput) {
3082                 _meter->run (bufs, start_frame, end_frame, nframes, true);
3083         }
3084
3085         passthru (bufs, start_frame, end_frame, nframes, declick);
3086
3087         return 0;
3088 }
3089
3090 int
3091 Route::silent_roll (pframes_t nframes, framepos_t /*start_frame*/, framepos_t /*end_frame*/, bool& /* need_butler */)
3092 {
3093         silence (nframes);
3094         return 0;
3095 }
3096
3097 void
3098 Route::flush_processors ()
3099 {
3100         /* XXX shouldn't really try to take this lock, since
3101            this is called from the RT audio thread.
3102         */
3103
3104         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3105
3106         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3107                 (*i)->flush ();
3108         }
3109 }
3110
3111 void
3112 Route::set_meter_point (MeterPoint p, bool force)
3113 {
3114         if (_meter_point == p && !force) {
3115                 return;
3116         }
3117
3118         bool meter_was_visible_to_user = _meter->display_to_user ();
3119
3120         {
3121                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
3122
3123                 maybe_note_meter_position ();
3124
3125                 _meter_point = p;
3126
3127                 if (_meter_point != MeterCustom) {
3128
3129                         _meter->set_display_to_user (false);
3130
3131                         setup_invisible_processors ();
3132
3133                 } else {
3134
3135                         _meter->set_display_to_user (true);
3136
3137                         /* If we have a previous position for the custom meter, try to put it there */
3138                         if (_custom_meter_position_noted) {
3139                                 boost::shared_ptr<Processor> after = _processor_after_last_custom_meter.lock ();
3140
3141                                 if (after) {
3142                                         ProcessorList::iterator i = find (_processors.begin(), _processors.end(), after);
3143                                         if (i != _processors.end ()) {
3144                                                 _processors.remove (_meter);
3145                                                 _processors.insert (i, _meter);
3146                                         }
3147                                 } else if (_last_custom_meter_was_at_end) {
3148                                         _processors.remove (_meter);
3149                                         _processors.push_back (_meter);
3150                                 }
3151                         }
3152                 }
3153
3154                 /* Set up the meter for its new position */
3155
3156                 ProcessorList::iterator loc = find (_processors.begin(), _processors.end(), _meter);
3157
3158                 ChanCount m_in;
3159
3160                 if (loc == _processors.begin()) {
3161                         m_in = _input->n_ports();
3162                 } else {
3163                         ProcessorList::iterator before = loc;
3164                         --before;
3165                         m_in = (*before)->output_streams ();
3166                 }
3167
3168                 _meter->reflect_inputs (m_in);
3169
3170                 /* we do not need to reconfigure the processors, because the meter
3171                    (a) is always ready to handle processor_max_streams
3172                    (b) is always an N-in/N-out processor, and thus moving
3173                    it doesn't require any changes to the other processors.
3174                 */
3175         }
3176
3177         meter_change (); /* EMIT SIGNAL */
3178
3179         bool const meter_visibly_changed = (_meter->display_to_user() != meter_was_visible_to_user);
3180
3181         processors_changed (RouteProcessorChange (RouteProcessorChange::MeterPointChange, meter_visibly_changed)); /* EMIT SIGNAL */
3182 }
3183
3184 void
3185 Route::listen_position_changed ()
3186 {
3187         {
3188                 Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
3189                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
3190                 ProcessorState pstate (this);
3191
3192                 if (configure_processors_unlocked (0)) {
3193                         pstate.restore ();
3194                         configure_processors_unlocked (0); // it worked before we tried to add it ...
3195                         return;
3196                 }
3197         }
3198
3199         processors_changed (RouteProcessorChange ()); /* EMIT SIGNAL */
3200         _session.set_dirty ();
3201 }
3202
3203 boost::shared_ptr<CapturingProcessor>
3204 Route::add_export_point()
3205 {
3206         if (!_capturing_processor) {
3207
3208                 _capturing_processor.reset (new CapturingProcessor (_session));
3209                 _capturing_processor->activate ();
3210
3211                 configure_processors (0);
3212
3213         }
3214
3215         return _capturing_processor;
3216 }
3217
3218 framecnt_t
3219 Route::update_signal_latency ()
3220 {
3221         framecnt_t l = _output->user_latency();
3222
3223         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3224                 if ((*i)->active ()) {
3225                         l += (*i)->signal_latency ();
3226                 }
3227         }
3228
3229         DEBUG_TRACE (DEBUG::Latency, string_compose ("%1: internal signal latency = %2\n", _name, l));
3230
3231         if (_signal_latency != l) {
3232                 _signal_latency = l;
3233                 signal_latency_changed (); /* EMIT SIGNAL */
3234         }
3235
3236         return _signal_latency;
3237 }
3238
3239 void
3240 Route::set_user_latency (framecnt_t nframes)
3241 {
3242         _output->set_user_latency (nframes);
3243         _session.update_latency_compensation ();
3244 }
3245
3246 void
3247 Route::set_latency_compensation (framecnt_t longest_session_latency)
3248 {
3249         framecnt_t old = _initial_delay;
3250
3251         if (_signal_latency < longest_session_latency) {
3252                 _initial_delay = longest_session_latency - _signal_latency;
3253         } else {
3254                 _initial_delay = 0;
3255         }
3256
3257         DEBUG_TRACE (DEBUG::Latency, string_compose (
3258                              "%1: compensate for maximum latency of %2,"
3259                              "given own latency of %3, using initial delay of %4\n",
3260                              name(), longest_session_latency, _signal_latency, _initial_delay));
3261
3262         if (_initial_delay != old) {
3263                 initial_delay_changed (); /* EMIT SIGNAL */
3264         }
3265
3266         if (_session.transport_stopped()) {
3267                 _roll_delay = _initial_delay;
3268         }
3269 }
3270
3271 Route::SoloControllable::SoloControllable (std::string name, boost::shared_ptr<Route> r)
3272         : AutomationControl (r->session(), Evoral::Parameter (SoloAutomation),
3273                              boost::shared_ptr<AutomationList>(), name)
3274         , _route (r)
3275 {
3276         boost::shared_ptr<AutomationList> gl(new AutomationList(Evoral::Parameter(SoloAutomation)));
3277         set_list (gl);
3278 }
3279
3280 void
3281 Route::SoloControllable::set_value (double val)
3282 {
3283         bool bval = ((val >= 0.5f) ? true: false);
3284
3285         boost::shared_ptr<RouteList> rl (new RouteList);
3286
3287         boost::shared_ptr<Route> r = _route.lock ();
3288         if (!r) {
3289                 return;
3290         }
3291
3292         rl->push_back (r);
3293
3294         if (Config->get_solo_control_is_listen_control()) {
3295                 _session.set_listen (rl, bval);
3296         } else {
3297                 _session.set_solo (rl, bval);
3298         }
3299 }
3300
3301 double
3302 Route::SoloControllable::get_value () const
3303 {
3304         boost::shared_ptr<Route> r = _route.lock ();
3305         if (!r) {
3306                 return 0;
3307         }
3308
3309         if (Config->get_solo_control_is_listen_control()) {
3310                 return r->listening_via_monitor() ? 1.0f : 0.0f;
3311         } else {
3312                 return r->self_soloed() ? 1.0f : 0.0f;
3313         }
3314 }
3315
3316 Route::MuteControllable::MuteControllable (std::string name, boost::shared_ptr<Route> r)
3317         : AutomationControl (r->session(), Evoral::Parameter (MuteAutomation),
3318                              boost::shared_ptr<AutomationList>(), name)
3319         , _route (r)
3320 {
3321         boost::shared_ptr<AutomationList> gl(new AutomationList(Evoral::Parameter(MuteAutomation)));
3322         set_list (gl);
3323 }
3324
3325 void
3326 Route::MuteControllable::set_value (double val)
3327 {
3328         bool bval = ((val >= 0.5f) ? true: false);
3329
3330         boost::shared_ptr<RouteList> rl (new RouteList);
3331
3332         boost::shared_ptr<Route> r = _route.lock ();
3333         if (!r) {
3334                 return;
3335         }
3336
3337         rl->push_back (r);
3338         _session.set_mute (rl, bval);
3339 }
3340
3341 double
3342 Route::MuteControllable::get_value () const
3343 {
3344         boost::shared_ptr<Route> r = _route.lock ();
3345         if (!r) {
3346                 return 0;
3347         }
3348
3349         return r->muted() ? 1.0f : 0.0f;
3350 }
3351
3352 void
3353 Route::set_block_size (pframes_t nframes)
3354 {
3355         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3356                 (*i)->set_block_size (nframes);
3357         }
3358
3359         _session.ensure_buffers (n_process_buffers ());
3360 }
3361
3362 void
3363 Route::protect_automation ()
3364 {
3365         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i)
3366                 (*i)->protect_automation();
3367 }
3368
3369 /** @param declick 1 to set a pending declick fade-in,
3370  *                -1 to set a pending declick fade-out
3371  */
3372 void
3373 Route::set_pending_declick (int declick)
3374 {
3375         if (_declickable) {
3376                 /* this call is not allowed to turn off a pending declick */
3377                 if (declick) {
3378                         _pending_declick = declick;
3379                 }
3380         } else {
3381                 _pending_declick = 0;
3382         }
3383 }
3384
3385 /** Shift automation forwards from a particular place, thereby inserting time.
3386  *  Adds undo commands for any shifts that are performed.
3387  *
3388  * @param pos Position to start shifting from.
3389  * @param frames Amount to shift forwards by.
3390  */
3391
3392 void
3393 Route::shift (framepos_t pos, framecnt_t frames)
3394 {
3395         /* gain automation */
3396         {
3397                 boost::shared_ptr<AutomationControl> gc = _amp->gain_control();
3398
3399                 XMLNode &before = gc->alist()->get_state ();
3400                 gc->alist()->shift (pos, frames);
3401                 XMLNode &after = gc->alist()->get_state ();
3402                 _session.add_command (new MementoCommand<AutomationList> (*gc->alist().get(), &before, &after));
3403         }
3404
3405         /* pan automation */
3406         if (_pannable) {
3407                 ControlSet::Controls& c (_pannable->controls());
3408
3409                 for (ControlSet::Controls::const_iterator ci = c.begin(); ci != c.end(); ++ci) {
3410                         boost::shared_ptr<AutomationControl> pc = boost::dynamic_pointer_cast<AutomationControl> (ci->second);
3411                         if (pc) {
3412                                 boost::shared_ptr<AutomationList> al = pc->alist();
3413                                 XMLNode& before = al->get_state ();
3414                                 al->shift (pos, frames);
3415                                 XMLNode& after = al->get_state ();
3416                                 _session.add_command (new MementoCommand<AutomationList> (*al.get(), &before, &after));
3417                         }
3418                 }
3419         }
3420
3421         /* redirect automation */
3422         {
3423                 Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3424                 for (ProcessorList::iterator i = _processors.begin (); i != _processors.end (); ++i) {
3425
3426                         set<Evoral::Parameter> parameters = (*i)->what_can_be_automated();
3427
3428                         for (set<Evoral::Parameter>::const_iterator p = parameters.begin (); p != parameters.end (); ++p) {
3429                                 boost::shared_ptr<AutomationControl> ac = (*i)->automation_control (*p);
3430                                 if (ac) {
3431                                         boost::shared_ptr<AutomationList> al = ac->alist();
3432                                         XMLNode &before = al->get_state ();
3433                                         al->shift (pos, frames);
3434                                         XMLNode &after = al->get_state ();
3435                                         _session.add_command (new MementoCommand<AutomationList> (*al.get(), &before, &after));
3436                                 }
3437                         }
3438                 }
3439         }
3440 }
3441
3442
3443 int
3444 Route::save_as_template (const string& path, const string& name)
3445 {
3446         XMLNode& node (state (false));
3447         XMLTree tree;
3448
3449         IO::set_name_in_state (*node.children().front(), name);
3450
3451         tree.set_root (&node);
3452         return tree.write (path.c_str());
3453 }
3454
3455
3456 bool
3457 Route::set_name (const string& str)
3458 {
3459         bool ret;
3460         string ioproc_name;
3461         string name;
3462
3463         name = Route::ensure_track_or_route_name (str, _session);
3464         SessionObject::set_name (name);
3465
3466         ret = (_input->set_name(name) && _output->set_name(name));
3467
3468         if (ret) {
3469                 /* rename the main outs. Leave other IO processors
3470                  * with whatever name they already have, because its
3471                  * just fine as it is (it will not contain the route
3472                  * name if its a port insert, port send or port return).
3473                  */
3474
3475                 if (_main_outs) {
3476                         if (_main_outs->set_name (name)) {
3477                                 /* XXX returning false here is stupid because
3478                                    we already changed the route name.
3479                                 */
3480                                 return false;
3481                         }
3482                 }
3483         }
3484
3485         return ret;
3486 }
3487
3488 /** Set the name of a route in an XML description.
3489  *  @param node XML <Route> node to set the name in.
3490  *  @param name New name.
3491  */
3492 void
3493 Route::set_name_in_state (XMLNode& node, string const & name)
3494 {
3495         node.add_property (X_("name"), name);
3496
3497         XMLNodeList children = node.children();
3498         for (XMLNodeIterator i = children.begin(); i != children.end(); ++i) {
3499
3500                 if ((*i)->name() == X_("IO")) {
3501
3502                         IO::set_name_in_state (**i, name);
3503
3504                 } else if ((*i)->name() == X_("Processor")) {
3505
3506                         XMLProperty* role = (*i)->property (X_("role"));
3507                         if (role && role->value() == X_("Main")) {
3508                                 (*i)->add_property (X_("name"), name);
3509                         }
3510
3511                 } else if ((*i)->name() == X_("Diskstream")) {
3512
3513                         (*i)->add_property (X_("playlist"), string_compose ("%1.1", name).c_str());
3514                         (*i)->add_property (X_("name"), name);
3515
3516                 }
3517         }
3518 }
3519
3520 boost::shared_ptr<Send>
3521 Route::internal_send_for (boost::shared_ptr<const Route> target) const
3522 {
3523         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3524
3525         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
3526                 boost::shared_ptr<InternalSend> send;
3527
3528                 if ((send = boost::dynamic_pointer_cast<InternalSend>(*i)) != 0) {
3529                         if (send->target_route() == target) {
3530                                 return send;
3531                         }
3532                 }
3533         }
3534
3535         return boost::shared_ptr<Send>();
3536 }
3537
3538 /** @param c Audio channel index.
3539  *  @param yn true to invert phase, otherwise false.
3540  */
3541 void
3542 Route::set_phase_invert (uint32_t c, bool yn)
3543 {
3544         if (_phase_invert[c] != yn) {
3545                 _phase_invert[c] = yn;
3546                 phase_invert_changed (); /* EMIT SIGNAL */
3547                 _session.set_dirty ();
3548         }
3549 }
3550
3551 void
3552 Route::set_phase_invert (boost::dynamic_bitset<> p)
3553 {
3554         if (_phase_invert != p) {
3555                 _phase_invert = p;
3556                 phase_invert_changed (); /* EMIT SIGNAL */
3557                 _session.set_dirty ();
3558         }
3559 }
3560
3561 bool
3562 Route::phase_invert (uint32_t c) const
3563 {
3564         return _phase_invert[c];
3565 }
3566
3567 boost::dynamic_bitset<>
3568 Route::phase_invert () const
3569 {
3570         return _phase_invert;
3571 }
3572
3573 void
3574 Route::set_denormal_protection (bool yn)
3575 {
3576         if (_denormal_protection != yn) {
3577                 _denormal_protection = yn;
3578                 denormal_protection_changed (); /* EMIT SIGNAL */
3579         }
3580 }
3581
3582 bool
3583 Route::denormal_protection () const
3584 {
3585         return _denormal_protection;
3586 }
3587
3588 void
3589 Route::set_active (bool yn, void* src)
3590 {
3591         if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_route_active()) {
3592                 _route_group->foreach_route (boost::bind (&Route::set_active, _1, yn, _route_group));
3593                 return;
3594         }
3595
3596         if (_active != yn) {
3597                 _active = yn;
3598                 _input->set_active (yn);
3599                 _output->set_active (yn);
3600                 active_changed (); // EMIT SIGNAL
3601                 _session.set_dirty ();
3602         }
3603 }
3604
3605 void
3606 Route::meter ()
3607 {
3608         Glib::Threads::RWLock::ReaderLock rm (_processor_lock, Glib::Threads::TRY_LOCK);
3609
3610         assert (_meter);
3611
3612         _meter->meter ();
3613
3614         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3615
3616                 boost::shared_ptr<Send> s;
3617                 boost::shared_ptr<Return> r;
3618
3619                 if ((s = boost::dynamic_pointer_cast<Send> (*i)) != 0) {
3620                         s->meter()->meter();
3621                 } else if ((r = boost::dynamic_pointer_cast<Return> (*i)) != 0) {
3622                         r->meter()->meter ();
3623                 }
3624         }
3625 }
3626
3627 boost::shared_ptr<Pannable>
3628 Route::pannable() const
3629 {
3630         return _pannable;
3631 }
3632
3633 boost::shared_ptr<Panner>
3634 Route::panner() const
3635 {
3636         /* may be null ! */
3637         return _main_outs->panner_shell()->panner();
3638 }
3639
3640 boost::shared_ptr<PannerShell>
3641 Route::panner_shell() const
3642 {
3643         return _main_outs->panner_shell();
3644 }
3645
3646 boost::shared_ptr<AutomationControl>
3647 Route::gain_control() const
3648 {
3649         return _amp->gain_control();
3650 }
3651
3652 boost::shared_ptr<AutomationControl>
3653 Route::get_control (const Evoral::Parameter& param)
3654 {
3655         /* either we own the control or .... */
3656
3657         boost::shared_ptr<AutomationControl> c = boost::dynamic_pointer_cast<AutomationControl>(control (param));
3658
3659         if (!c) {
3660
3661                 /* maybe one of our processors does or ... */
3662
3663                 Glib::Threads::RWLock::ReaderLock rm (_processor_lock, Glib::Threads::TRY_LOCK);
3664                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3665                         if ((c = boost::dynamic_pointer_cast<AutomationControl>((*i)->control (param))) != 0) {
3666                                 break;
3667                         }
3668                 }
3669         }
3670
3671         if (!c) {
3672
3673                 /* nobody does so we'll make a new one */
3674
3675                 c = boost::dynamic_pointer_cast<AutomationControl>(control_factory(param));
3676                 add_control(c);
3677         }
3678
3679         return c;
3680 }
3681
3682 boost::shared_ptr<Processor>
3683 Route::nth_plugin (uint32_t n)
3684 {
3685         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3686         ProcessorList::iterator i;
3687
3688         for (i = _processors.begin(); i != _processors.end(); ++i) {
3689                 if (boost::dynamic_pointer_cast<PluginInsert> (*i)) {
3690                         if (n-- == 0) {
3691                                 return *i;
3692                         }
3693                 }
3694         }
3695
3696         return boost::shared_ptr<Processor> ();
3697 }
3698
3699 boost::shared_ptr<Processor>
3700 Route::nth_send (uint32_t n)
3701 {
3702         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3703         ProcessorList::iterator i;
3704
3705         for (i = _processors.begin(); i != _processors.end(); ++i) {
3706                 if (boost::dynamic_pointer_cast<Send> (*i)) {
3707                         if (n-- == 0) {
3708                                 return *i;
3709                         }
3710                 }
3711         }
3712
3713         return boost::shared_ptr<Processor> ();
3714 }
3715
3716 bool
3717 Route::has_io_processor_named (const string& name)
3718 {
3719         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3720         ProcessorList::iterator i;
3721
3722         for (i = _processors.begin(); i != _processors.end(); ++i) {
3723                 if (boost::dynamic_pointer_cast<Send> (*i) ||
3724                     boost::dynamic_pointer_cast<PortInsert> (*i)) {
3725                         if ((*i)->name() == name) {
3726                                 return true;
3727                         }
3728                 }
3729         }
3730
3731         return false;
3732 }
3733
3734 MuteMaster::MutePoint
3735 Route::mute_points () const
3736 {
3737         return _mute_master->mute_points ();
3738 }
3739
3740 void
3741 Route::set_processor_positions ()
3742 {
3743         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3744
3745         bool had_amp = false;
3746         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3747                 (*i)->set_pre_fader (!had_amp);
3748                 if (boost::dynamic_pointer_cast<Amp> (*i)) {
3749                         had_amp = true;
3750                 }
3751         }
3752 }
3753
3754 /** Called when there is a proposed change to the input port count */
3755 bool
3756 Route::input_port_count_changing (ChanCount to)
3757 {
3758         list<pair<ChanCount, ChanCount> > c = try_configure_processors (to, 0);
3759         if (c.empty()) {
3760                 /* The processors cannot be configured with the new input arrangement, so
3761                    block the change.
3762                 */
3763                 return true;
3764         }
3765
3766         /* The change is ok */
3767         return false;
3768 }
3769
3770 /** Called when there is a proposed change to the output port count */
3771 bool
3772 Route::output_port_count_changing (ChanCount to)
3773 {
3774         for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
3775                 if (processor_out_streams.get(*t) > to.get(*t)) {
3776                         return true;
3777                 }
3778         }
3779         /* The change is ok */
3780         return false;
3781 }
3782
3783 list<string>
3784 Route::unknown_processors () const
3785 {
3786         list<string> p;
3787
3788         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
3789         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
3790                 if (boost::dynamic_pointer_cast<UnknownProcessor const> (*i)) {
3791                         p.push_back ((*i)->name ());
3792                 }
3793         }
3794
3795         return p;
3796 }
3797
3798
3799 framecnt_t
3800 Route::update_port_latencies (PortSet& from, PortSet& to, bool playback, framecnt_t our_latency) const
3801 {
3802         /* we assume that all our input ports feed all our output ports. its not
3803            universally true, but the alternative is way too corner-case to worry about.
3804         */
3805
3806         LatencyRange all_connections;
3807
3808         if (from.empty()) {
3809                 all_connections.min = 0;
3810                 all_connections.max = 0;
3811         } else {
3812                 all_connections.min = ~((pframes_t) 0);
3813                 all_connections.max = 0;
3814
3815                 /* iterate over all "from" ports and determine the latency range for all of their
3816                    connections to the "outside" (outside of this Route).
3817                 */
3818
3819                 for (PortSet::iterator p = from.begin(); p != from.end(); ++p) {
3820
3821                         LatencyRange range;
3822
3823                         p->get_connected_latency_range (range, playback);
3824
3825                         all_connections.min = min (all_connections.min, range.min);
3826                         all_connections.max = max (all_connections.max, range.max);
3827                 }
3828         }
3829
3830         /* set the "from" port latencies to the max/min range of all their connections */
3831
3832         for (PortSet::iterator p = from.begin(); p != from.end(); ++p) {
3833                 p->set_private_latency_range (all_connections, playback);
3834         }
3835
3836         /* set the ports "in the direction of the flow" to the same value as above plus our own signal latency */
3837
3838         all_connections.min += our_latency;
3839         all_connections.max += our_latency;
3840
3841         for (PortSet::iterator p = to.begin(); p != to.end(); ++p) {
3842                 p->set_private_latency_range (all_connections, playback);
3843         }
3844
3845         return all_connections.max;
3846 }
3847
3848 framecnt_t
3849 Route::set_private_port_latencies (bool playback) const
3850 {
3851         framecnt_t own_latency = 0;
3852
3853         /* Processor list not protected by lock: MUST BE CALLED FROM PROCESS THREAD
3854            OR LATENCY CALLBACK.
3855
3856            This is called (early) from the latency callback. It computes the REAL
3857            latency associated with each port and stores the result as the "private"
3858            latency of the port. A later call to Route::set_public_port_latencies()
3859            sets all ports to the same value to reflect the fact that we do latency
3860            compensation and so all signals are delayed by the same amount as they
3861            flow through ardour.
3862         */
3863
3864         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
3865                 if ((*i)->active ()) {
3866                         own_latency += (*i)->signal_latency ();
3867                 }
3868         }
3869
3870         if (playback) {
3871                 /* playback: propagate latency from "outside the route" to outputs to inputs */
3872                 return update_port_latencies (_output->ports (), _input->ports (), true, own_latency);
3873         } else {
3874                 /* capture: propagate latency from "outside the route" to inputs to outputs */
3875                 return update_port_latencies (_input->ports (), _output->ports (), false, own_latency);
3876         }
3877 }
3878
3879 void
3880 Route::set_public_port_latencies (framecnt_t value, bool playback) const
3881 {
3882         /* this is called to set the JACK-visible port latencies, which take
3883            latency compensation into account.
3884         */
3885
3886         LatencyRange range;
3887
3888         range.min = value;
3889         range.max = value;
3890
3891         {
3892                 const PortSet& ports (_input->ports());
3893                 for (PortSet::const_iterator p = ports.begin(); p != ports.end(); ++p) {
3894                         p->set_public_latency_range (range, playback);
3895                 }
3896         }
3897
3898         {
3899                 const PortSet& ports (_output->ports());
3900                 for (PortSet::const_iterator p = ports.begin(); p != ports.end(); ++p) {
3901                         p->set_public_latency_range (range, playback);
3902                 }
3903         }
3904 }
3905
3906 /** Put the invisible processors in the right place in _processors.
3907  *  Must be called with a writer lock on _processor_lock held.
3908  */
3909 void
3910 Route::setup_invisible_processors ()
3911 {
3912 #ifndef NDEBUG
3913         Glib::Threads::RWLock::WriterLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
3914         assert (!lm.locked ());
3915 #endif
3916
3917         if (!_main_outs) {
3918                 /* too early to be doing this stuff */
3919                 return;
3920         }
3921
3922         /* we'll build this new list here and then use it */
3923
3924         ProcessorList new_processors;
3925
3926         /* find visible processors */
3927
3928         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
3929                 if ((*i)->display_to_user ()) {
3930                         new_processors.push_back (*i);
3931                 }
3932         }
3933
3934         /* find the amp */
3935
3936         ProcessorList::iterator amp = new_processors.begin ();
3937         while (amp != new_processors.end() && boost::dynamic_pointer_cast<Amp> (*amp) == 0) {
3938                 ++amp;
3939         }
3940
3941         assert (amp != _processors.end ());
3942
3943         /* and the processor after the amp */
3944
3945         ProcessorList::iterator after_amp = amp;
3946         ++after_amp;
3947
3948         /* METER */
3949
3950         if (_meter) {
3951                 switch (_meter_point) {
3952                 case MeterInput:
3953                         assert (!_meter->display_to_user ());
3954                         new_processors.push_front (_meter);
3955                         break;
3956                 case MeterPreFader:
3957                         assert (!_meter->display_to_user ());
3958                         new_processors.insert (amp, _meter);
3959                         break;
3960                 case MeterPostFader:
3961                         /* do nothing here */
3962                         break;
3963                 case MeterOutput:
3964                         /* do nothing here */
3965                         break;
3966                 case MeterCustom:
3967                         /* the meter is visible, so we don't touch it here */
3968                         break;
3969                 }
3970         }
3971
3972         /* MAIN OUTS */
3973
3974         assert (_main_outs);
3975         assert (!_main_outs->display_to_user ());
3976         new_processors.push_back (_main_outs);
3977
3978         /* iterator for the main outs */
3979
3980         ProcessorList::iterator main = new_processors.end();
3981         --main;
3982
3983         /* OUTPUT METERING */
3984
3985         if (_meter && (_meter_point == MeterOutput || _meter_point == MeterPostFader)) {
3986                 assert (!_meter->display_to_user ());
3987
3988                 /* add the processor just before or just after the main outs */
3989
3990                 ProcessorList::iterator meter_point = main;
3991
3992                 if (_meter_point == MeterOutput) {
3993                         ++meter_point;
3994                 }
3995                 new_processors.insert (meter_point, _meter);
3996         }
3997
3998         /* MONITOR SEND */
3999
4000         if (_monitor_send && !is_monitor ()) {
4001                 assert (!_monitor_send->display_to_user ());
4002                 if (Config->get_solo_control_is_listen_control()) {
4003                         switch (Config->get_listen_position ()) {
4004                         case PreFaderListen:
4005                                 switch (Config->get_pfl_position ()) {
4006                                 case PFLFromBeforeProcessors:
4007                                         new_processors.push_front (_monitor_send);
4008                                         break;
4009                                 case PFLFromAfterProcessors:
4010                                         new_processors.insert (amp, _monitor_send);
4011                                         break;
4012                                 }
4013                                 _monitor_send->set_can_pan (false);
4014                                 break;
4015                         case AfterFaderListen:
4016                                 switch (Config->get_afl_position ()) {
4017                                 case AFLFromBeforeProcessors:
4018                                         new_processors.insert (after_amp, _monitor_send);
4019                                         break;
4020                                 case AFLFromAfterProcessors:
4021                                         new_processors.insert (new_processors.end(), _monitor_send);
4022                                         break;
4023                                 }
4024                                 _monitor_send->set_can_pan (true);
4025                                 break;
4026                         }
4027                 }  else {
4028                         new_processors.insert (new_processors.end(), _monitor_send);
4029                         _monitor_send->set_can_pan (false);
4030                 }
4031         }
4032
4033         /* MONITOR CONTROL */
4034
4035         if (_monitor_control && is_monitor ()) {
4036                 assert (!_monitor_control->display_to_user ());
4037                 new_processors.push_front (_monitor_control);
4038         }
4039
4040         /* INTERNAL RETURN */
4041
4042         /* doing this here means that any monitor control will come just after
4043            the return.
4044         */
4045
4046         if (_intreturn) {
4047                 assert (!_intreturn->display_to_user ());
4048                 new_processors.push_front (_intreturn);
4049         }
4050
4051         /* EXPORT PROCESSOR */
4052
4053         if (_capturing_processor) {
4054                 assert (!_capturing_processor->display_to_user ());
4055                 new_processors.push_front (_capturing_processor);
4056         }
4057
4058         _processors = new_processors;
4059
4060         DEBUG_TRACE (DEBUG::Processors, string_compose ("%1: setup_invisible_processors\n", _name));
4061         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4062                 DEBUG_TRACE (DEBUG::Processors, string_compose ("\t%1\n", (*i)->name ()));
4063         }
4064 }
4065
4066 void
4067 Route::unpan ()
4068 {
4069         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
4070         Glib::Threads::RWLock::ReaderLock lp (_processor_lock);
4071
4072         _pannable.reset ();
4073
4074         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4075                 boost::shared_ptr<Delivery> d = boost::dynamic_pointer_cast<Delivery>(*i);
4076                 if (d) {
4077                         d->unpan ();
4078                 }
4079         }
4080 }
4081
4082 /** If the meter point is `Custom', make a note of where the meter is.
4083  *  This is so that if the meter point is subsequently set to something else,
4084  *  and then back to custom, we can put the meter back where it was last time
4085  *  custom was enabled.
4086  *
4087  *  Must be called with the _processor_lock held.
4088  */
4089 void
4090 Route::maybe_note_meter_position ()
4091 {
4092         if (_meter_point != MeterCustom) {
4093                 return;
4094         }
4095
4096         _custom_meter_position_noted = true;
4097         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4098                 if (boost::dynamic_pointer_cast<PeakMeter> (*i)) {
4099                         ProcessorList::iterator j = i;
4100                         ++j;
4101                         if (j != _processors.end ()) {
4102                                 _processor_after_last_custom_meter = *j;
4103                                 _last_custom_meter_was_at_end = false;
4104                         } else {
4105                                 _last_custom_meter_was_at_end = true;
4106                         }
4107                 }
4108         }
4109 }
4110
4111 boost::shared_ptr<Processor>
4112 Route::processor_by_id (PBD::ID id) const
4113 {
4114         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4115         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4116                 if ((*i)->id() == id) {
4117                         return *i;
4118                 }
4119         }
4120
4121         return boost::shared_ptr<Processor> ();
4122 }
4123
4124 /** @return the monitoring state, or in other words what data we are pushing
4125  *  into the route (data from the inputs, data from disk or silence)
4126  */
4127 MonitorState
4128 Route::monitoring_state () const
4129 {
4130         return MonitoringInput;
4131 }
4132
4133 /** @return what we should be metering; either the data coming from the input
4134  *  IO or the data that is flowing through the route.
4135  */
4136 MeterState
4137 Route::metering_state () const
4138 {
4139         return MeteringRoute;
4140 }
4141
4142 bool
4143 Route::has_external_redirects () const
4144 {
4145         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4146
4147                 /* ignore inactive processors and obviously ignore the main
4148                  * outs since everything has them and we don't care.
4149                  */
4150
4151                 if ((*i)->active() && (*i) != _main_outs && (*i)->does_routing()) {
4152                         return true;;
4153                 }
4154         }
4155
4156         return false;
4157 }
4158
4159 boost::shared_ptr<Processor>
4160 Route::the_instrument () const
4161 {
4162         Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
4163         return the_instrument_unlocked ();
4164 }
4165
4166 boost::shared_ptr<Processor>
4167 Route::the_instrument_unlocked () const
4168 {
4169         for (ProcessorList::const_iterator i = _processors.begin(); i != _processors.end(); ++i) {
4170                 if (boost::dynamic_pointer_cast<PluginInsert>(*i)) {
4171                         if ((*i)->input_streams().n_midi() > 0 &&
4172                             (*i)->output_streams().n_audio() > 0) {
4173                                 return (*i);
4174                         }
4175                 }
4176         }
4177         return boost::shared_ptr<Processor>();
4178 }
4179
4180
4181
4182 void
4183 Route::non_realtime_locate (framepos_t pos)
4184 {
4185         if (_pannable) {
4186                 _pannable->transport_located (pos);
4187         }
4188
4189         {
4190                 //Glib::Threads::Mutex::Lock lx (AudioEngine::instance()->process_lock ());
4191                 Glib::Threads::RWLock::WriterLock lm (_processor_lock);
4192
4193                 for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
4194                         (*i)->transport_located (pos);
4195                 }
4196         }
4197 }
4198
4199 void
4200 Route::fill_buffers_with_input (BufferSet& bufs, boost::shared_ptr<IO> io, pframes_t nframes)
4201 {
4202         size_t n_buffers;
4203         size_t i;
4204
4205         /* MIDI
4206          *
4207          * We don't currently mix MIDI input together, so we don't need the
4208          * complex logic of the audio case.
4209          */
4210
4211         n_buffers = bufs.count().n_midi ();
4212
4213         for (i = 0; i < n_buffers; ++i) {
4214
4215                 boost::shared_ptr<MidiPort> source_port = io->midi (i);
4216                 MidiBuffer& buf (bufs.get_midi (i));
4217
4218                 if (source_port) {
4219                         buf.copy (source_port->get_midi_buffer(nframes));
4220                 } else {
4221                         buf.silence (nframes);
4222                 }
4223         }
4224
4225         /* AUDIO */
4226
4227         n_buffers = bufs.count().n_audio();
4228
4229         size_t n_ports = io->n_ports().n_audio();
4230         float scaling = 1.0f;
4231
4232         if (n_ports > n_buffers) {
4233                 scaling = ((float) n_buffers) / n_ports;
4234         }
4235
4236         for (i = 0; i < n_ports; ++i) {
4237
4238                 /* if there are more ports than buffers, map them onto buffers
4239                  * in a round-robin fashion
4240                  */
4241
4242                 boost::shared_ptr<AudioPort> source_port = io->audio (i);
4243                 AudioBuffer& buf (bufs.get_audio (i%n_buffers));
4244
4245
4246                 if (i < n_buffers) {
4247
4248                         /* first time through just copy a channel into
4249                            the output buffer.
4250                         */
4251
4252                         buf.read_from (source_port->get_audio_buffer (nframes), nframes);
4253
4254                         if (scaling != 1.0f) {
4255                                 buf.apply_gain (scaling, nframes);
4256                         }
4257
4258                 } else {
4259
4260                         /* on subsequent times around, merge data from
4261                          * the port with what is already there
4262                          */
4263
4264                         if (scaling != 1.0f) {
4265                                 buf.accumulate_with_gain_from (source_port->get_audio_buffer (nframes), nframes, 0, scaling);
4266                         } else {
4267                                 buf.accumulate_from (source_port->get_audio_buffer (nframes), nframes);
4268                         }
4269                 }
4270         }
4271
4272         /* silence any remaining buffers */
4273
4274         for (; i < n_buffers; ++i) {
4275                 AudioBuffer& buf (bufs.get_audio (i));
4276                 buf.silence (nframes);
4277         }
4278
4279         /* establish the initial setup of the buffer set, reflecting what was
4280            copied into it. unless, of course, we are the auditioner, in which
4281            case nothing was fed into it from the inputs at all.
4282         */
4283
4284         if (!is_auditioner()) {
4285                 bufs.set_count (io->n_ports());
4286         }
4287 }