gtk2_ardour/port_group.cc

   1 /*
   2     Copyright (C) 2002-2009 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <cstring>
  21 #include <boost/shared_ptr.hpp>
  22 #include <boost/algorithm/string.hpp>
  23
  24 #include "midi++/manager.h"
  25 #include "midi++/mmc.h"
  26
  27 #include "ardour/audio_track.h"
  28 #include "ardour/audioengine.h"
  29 #include "ardour/bundle.h"
  30 #include "ardour/user_bundle.h"
  31 #include "ardour/io_processor.h"
  32 #include "ardour/midi_track.h"
  33 #include "ardour/port.h"
  34 #include "ardour/session.h"
  35 #include "ardour/auditioner.h"
  36 #include "ardour/control_protocol_manager.h"
  37 #include "control_protocol/control_protocol.h"
  38
  39 #include "gui_thread.h"
  40 #include "port_group.h"
  41 #include "port_matrix.h"
  42 #include "time_axis_view.h"
  43 #include "public_editor.h"
  44
  45 #include "i18n.h"
  46
  47 using namespace std;
  48 using namespace Gtk;
  49 using namespace ARDOUR;
  50
  51 /** PortGroup constructor.
  52  * @param n Name.
  53  */
  54 PortGroup::PortGroup (std::string const & n)
  55         : name (n)
  56 {
  57
  58 }
  59
  60 PortGroup::~PortGroup()
  61 {
  62         for (BundleList::iterator i = _bundles.begin(); i != _bundles.end(); ++i) {
  63                 delete *i;
  64         }
  65         _bundles.clear ();
  66 }
  67
  68 /** Add a bundle to a group.
  69  *  @param b Bundle.
  70  *  @param allow_dups true to allow the group to contain more than one bundle with the same port, otherwise false.
  71  */
  72 void
  73 PortGroup::add_bundle (boost::shared_ptr<Bundle> b, bool allow_dups)
  74 {
  75         add_bundle_internal (b, boost::shared_ptr<IO> (), false, Gdk::Color (), allow_dups);
  76 }
  77
  78 /** Add a bundle to a group.
  79  *  @param b Bundle.
  80  *  @param io IO whose ports are in the bundle.
  81  */
  82 void
  83 PortGroup::add_bundle (boost::shared_ptr<Bundle> b, boost::shared_ptr<IO> io)
  84 {
  85         add_bundle_internal (b, io, false, Gdk::Color (), false);
  86 }
  87
  88 /** Add a bundle to a group.
  89  *  @param b Bundle.
  90  *  @param c Colour to represent the bundle with.
  91  */
  92 void
  93 PortGroup::add_bundle (boost::shared_ptr<Bundle> b, boost::shared_ptr<IO> io, Gdk::Color c)
  94 {
  95         add_bundle_internal (b, io, true, c, false);
  96 }
  97
  98 PortGroup::BundleRecord::BundleRecord (boost::shared_ptr<ARDOUR::Bundle> b, boost::shared_ptr<ARDOUR::IO> iop, Gdk::Color c, bool has_c)
  99         : bundle (b)
 100         , io (iop)
 101         , colour (c)
 102         , has_colour (has_c)
 103 {
 104 }
 105
 106 void
 107 PortGroup::add_bundle_internal (boost::shared_ptr<Bundle> b, boost::shared_ptr<IO> io, bool has_colour, Gdk::Color colour, bool allow_dups)
 108 {
 109         assert (b.get());
 110
 111         if (!allow_dups) {
 112
 113                 /* don't add this bundle if we already have one with the same ports */
 114
 115                 BundleList::iterator i = _bundles.begin ();
 116                 while (i != _bundles.end() && b->has_same_ports ((*i)->bundle) == false) {
 117                         ++i;
 118                 }
 119
 120                 if (i != _bundles.end ()) {
 121                         return;
 122                 }
 123         }
 124
 125         BundleRecord* br = new BundleRecord (b, io, colour, has_colour);
 126         b->Changed.connect (br->changed_connection, invalidator (*this), ui_bind (&PortGroup::bundle_changed, this, _1), gui_context());
 127         _bundles.push_back (br);
 128
 129         Changed ();
 130 }
 131
 132 void
 133 PortGroup::remove_bundle (boost::shared_ptr<Bundle> b)
 134 {
 135         assert (b.get());
 136
 137         BundleList::iterator i = _bundles.begin ();
 138         while (i != _bundles.end() && (*i)->bundle != b) {
 139                 ++i;
 140         }
 141
 142         if (i == _bundles.end()) {
 143                 return;
 144         }
 145
 146         delete *i;
 147         _bundles.erase (i);
 148
 149         Changed ();
 150 }
 151
 152 void
 153 PortGroup::bundle_changed (Bundle::Change c)
 154 {
 155         BundleChanged (c);
 156 }
 157
 158
 159 void
 160 PortGroup::clear ()
 161 {
 162         for (BundleList::iterator i = _bundles.begin(); i != _bundles.end(); ++i) {
 163                 delete *i;
 164         }
 165
 166         _bundles.clear ();
 167         Changed ();
 168 }
 169
 170 bool
 171 PortGroup::has_port (std::string const& p) const
 172 {
 173         for (BundleList::const_iterator i = _bundles.begin(); i != _bundles.end(); ++i) {
 174                 if ((*i)->bundle->offers_port_alone (p)) {
 175                         return true;
 176                 }
 177         }
 178
 179         return false;
 180 }
 181
 182 boost::shared_ptr<Bundle>
 183 PortGroup::only_bundle ()
 184 {
 185         assert (_bundles.size() == 1);
 186         return _bundles.front()->bundle;
 187 }
 188
 189
 190 ChanCount
 191 PortGroup::total_channels () const
 192 {
 193         ChanCount n;
 194         for (BundleList::const_iterator i = _bundles.begin(); i != _bundles.end(); ++i) {
 195                 n += (*i)->bundle->nchannels ();
 196         }
 197
 198         return n;
 199 }
 200
 201 boost::shared_ptr<IO>
 202 PortGroup::io_from_bundle (boost::shared_ptr<ARDOUR::Bundle> b) const
 203 {
 204         BundleList::const_iterator i = _bundles.begin ();
 205         while (i != _bundles.end() && (*i)->bundle != b) {
 206                 ++i;
 207         }
 208
 209         if (i == _bundles.end()) {
 210                 return boost::shared_ptr<IO> ();
 211         }
 212
 213         boost::shared_ptr<IO> io ((*i)->io.lock ());
 214         return io;
 215 }
 216
 217 /** Remove bundles whose channels are already represented by other, larger bundles */
 218 void
 219 PortGroup::remove_duplicates ()
 220 {
 221         BundleList::iterator i = _bundles.begin();
 222         while (i != _bundles.end()) {
 223
 224                 BundleList::iterator tmp = i;
 225                 ++tmp;
 226
 227                 bool remove = false;
 228
 229                 for (BundleList::iterator j = _bundles.begin(); j != _bundles.end(); ++j) {
 230
 231                         if ((*j)->bundle->nchannels() > (*i)->bundle->nchannels()) {
 232                                 /* this bundle is larger */
 233
 234                                 uint32_t k = 0;
 235                                 while (k < (*i)->bundle->nchannels().n_total()) {
 236                                         /* see if this channel on *i has an equivalent on *j */
 237                                         uint32_t l = 0;
 238                                         while (l < (*j)->bundle->nchannels().n_total() && (*i)->bundle->channel_ports (k) != (*j)->bundle->channel_ports (l)) {
 239                                                 ++l;
 240                                         }
 241
 242                                         if (l == (*j)->bundle->nchannels().n_total()) {
 243                                                 /* it does not */
 244                                                 break;
 245                                         }
 246
 247                                         ++k;
 248                                 }
 249
 250                                 if (k == (*i)->bundle->nchannels().n_total()) {
 251                                         /* all channels on *i are represented by the larger bundle *j, so remove *i */
 252                                         remove = true;
 253                                         break;
 254                                 }
 255                         }
 256                 }
 257
 258                 if (remove) {
 259                         _bundles.erase (i);
 260                 }
 261
 262                 i = tmp;
 263         }
 264 }
 265
 266
 267 /** PortGroupList constructor.
 268  */
 269 PortGroupList::PortGroupList ()
 270         : _signals_suspended (false), _pending_change (false), _pending_bundle_change ((Bundle::Change) 0)
 271 {
 272
 273 }
 274
 275 PortGroupList::~PortGroupList()
 276 {
 277         /* XXX need to clean up bundles, but ownership shared with PortGroups */
 278 }
 279
 280 void
 281 PortGroupList::maybe_add_processor_to_list (
 282         boost::weak_ptr<Processor> wp, list<boost::shared_ptr<IO> >* route_ios, bool inputs, set<boost::shared_ptr<IO> >& used_io
 283         )
 284 {
 285         boost::shared_ptr<Processor> p (wp.lock());
 286
 287         if (!p) {
 288                 return;
 289         }
 290
 291         boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor> (p);
 292
 293         if (iop) {
 294
 295                 boost::shared_ptr<IO> io = inputs ? iop->input() : iop->output();
 296
 297                 if (io && used_io.find (io) == used_io.end()) {
 298                         route_ios->push_back (io);
 299                         used_io.insert (io);
 300                 }
 301         }
 302 }
 303
 304 struct RouteIOs {
 305         RouteIOs (boost::shared_ptr<Route> r, boost::shared_ptr<IO> i) {
 306                 route = r;
 307                 ios.push_back (i);
 308         }
 309
 310         boost::shared_ptr<Route> route;
 311         /* it's ok to use a shared_ptr here as RouteIOs structs are only used during ::gather () */
 312         std::list<boost::shared_ptr<IO> > ios;
 313 };
 314
 315 class RouteIOsComparator {
 316 public:
 317         bool operator() (RouteIOs const & a, RouteIOs const & b) {
 318                 return a.route->order_key (X_("editor")) < b.route->order_key (X_("editor"));
 319         }
 320 };
 321
 322 /** Gather ports from around the system and put them in this PortGroupList.
 323  *  @param type Type of ports to collect, or NIL for all types.
 324  */
 325 void
 326 PortGroupList::gather (ARDOUR::Session* session, ARDOUR::DataType type, bool inputs, bool allow_dups)
 327 {
 328         clear ();
 329
 330         if (session == 0) {
 331                 return;
 332         }
 333
 334         boost::shared_ptr<PortGroup> bus (new PortGroup (string_compose (_("%1 Busses"), PROGRAM_NAME)));
 335         boost::shared_ptr<PortGroup> track (new PortGroup (string_compose (_("%1 Tracks"), PROGRAM_NAME)));
 336         boost::shared_ptr<PortGroup> system (new PortGroup (_("Hardware")));
 337         boost::shared_ptr<PortGroup> ardour (new PortGroup (string_compose (_("%1 Misc"), PROGRAM_NAME)));
 338         boost::shared_ptr<PortGroup> other (new PortGroup (_("Other")));
 339
 340         /* Find the IOs which have bundles for routes and their processors.  We store
 341            these IOs in a RouteIOs class so that we can then sort the results by route
 342            order key.
 343         */
 344
 345         boost::shared_ptr<RouteList> routes = session->get_routes ();
 346         list<RouteIOs> route_ios;
 347
 348         for (RouteList::const_iterator i = routes->begin(); i != routes->end(); ++i) {
 349
 350                 /* we never show the monitor bus inputs */
 351
 352                 if (inputs && (*i)->is_monitor()) {
 353                         continue;
 354                 }
 355
 356                 /* keep track of IOs that we have taken bundles from,
 357                    so that we can avoid taking the same IO from both
 358                    Route::output() and the main_outs Delivery
 359                 */
 360
 361                 set<boost::shared_ptr<IO> > used_io;
 362                 boost::shared_ptr<IO> io = inputs ? (*i)->input() : (*i)->output();
 363                 used_io.insert (io);
 364
 365                 RouteIOs rb (*i, io);
 366                 (*i)->foreach_processor (boost::bind (&PortGroupList::maybe_add_processor_to_list, this, _1, &rb.ios, inputs, used_io));
 367
 368                 route_ios.push_back (rb);
 369         }
 370
 371         /* Sort RouteIOs by the routes' editor order keys */
 372         route_ios.sort (RouteIOsComparator ());
 373
 374         /* Now put the bundles that belong to these sorted RouteIOs into the PortGroup.
 375            Note that if the RouteIO's bundles are multi-type, we may make new Bundles
 376            with only the ports of one type.
 377         */
 378
 379         for (list<RouteIOs>::iterator i = route_ios.begin(); i != route_ios.end(); ++i) {
 380                 TimeAxisView* tv = PublicEditor::instance().axis_view_from_route (i->route);
 381
 382                 /* Work out which group to put these IOs' bundles in */
 383                 boost::shared_ptr<PortGroup> g;
 384                 if (boost::dynamic_pointer_cast<Track> (i->route)) {
 385                         g = track;
 386                 } else {
 387                         g = bus;
 388                 }
 389
 390                 for (list<boost::shared_ptr<IO> >::iterator j = i->ios.begin(); j != i->ios.end(); ++j) {
 391                         boost::shared_ptr<Bundle> b = bundle_for_type ((*j)->bundle(), type);
 392                         if (tv) {
 393                                 g->add_bundle (b, *j, tv->color ());
 394                         } else {
 395                                 g->add_bundle (b, *j);
 396                         }
 397                 }
 398         }
 399
 400         /* Bundles owned by the session; add user bundles first, then normal ones, so
 401            that UserBundles that offer the same ports as a normal bundle get priority
 402         */
 403
 404         boost::shared_ptr<BundleList> b = session->bundles ();
 405
 406         for (BundleList::iterator i = b->begin(); i != b->end(); ++i) {
 407                 if (boost::dynamic_pointer_cast<UserBundle> (*i) && (*i)->ports_are_inputs() == inputs) {
 408                         boost::shared_ptr<Bundle> b = bundle_for_type (*i, type);
 409                         system->add_bundle (b, allow_dups);
 410                 }
 411         }
 412
 413         for (BundleList::iterator i = b->begin(); i != b->end(); ++i) {
 414                 if (boost::dynamic_pointer_cast<UserBundle> (*i) == 0 && (*i)->ports_are_inputs() == inputs) {
 415                         boost::shared_ptr<Bundle> b = bundle_for_type (*i, type);
 416                         system->add_bundle (b, allow_dups);
 417                 }
 418         }
 419
 420         /* Ardour stuff */
 421
 422         if (!inputs) {
 423                 boost::shared_ptr<Bundle> b = bundle_for_type (session->the_auditioner()->output()->bundle(), type);
 424                 ardour->add_bundle (b);
 425
 426                 b = bundle_for_type (session->click_io()->bundle(), type);
 427                 ardour->add_bundle (b);
 428         }
 429
 430         /* Ardour's surfaces */
 431
 432         ControlProtocolManager& m = ControlProtocolManager::instance ();
 433         for (list<ControlProtocolInfo*>::iterator i = m.control_protocol_info.begin(); i != m.control_protocol_info.end(); ++i) {
 434                 if ((*i)->protocol) {
 435                         list<boost::shared_ptr<Bundle> > b = (*i)->protocol->bundles ();
 436                         for (list<boost::shared_ptr<Bundle> >::iterator j = b.begin(); j != b.end(); ++j) {
 437                                 if ((*j)->ports_are_inputs() == inputs) {
 438                                         ardour->add_bundle (*j);
 439                                 }
 440                         }
 441                 }
 442         }
 443
 444         /* Ardour's sync ports */
 445
 446         MIDI::Manager* midi_manager = MIDI::Manager::instance ();
 447         if (midi_manager && (type == DataType::MIDI || type == DataType::NIL)) {
 448                 boost::shared_ptr<Bundle> sync (new Bundle (_("Sync"), inputs));
 449                 MIDI::MachineControl* mmc = midi_manager->mmc ();
 450                 AudioEngine& ae = session->engine ();
 451                 if (inputs) {
 452                         sync->add_channel (
 453                                 _("MTC in"), DataType::MIDI, ae.make_port_name_non_relative (midi_manager->mtc_input_port()->name())
 454                                 );
 455                         sync->add_channel (
 456                                 _("MIDI control in"), DataType::MIDI, ae.make_port_name_non_relative (midi_manager->midi_input_port()->name())
 457                                 );
 458                         sync->add_channel (
 459                                 _("MIDI clock in"), DataType::MIDI, ae.make_port_name_non_relative (midi_manager->midi_clock_input_port()->name())
 460                                 );
 461                         sync->add_channel (
 462                                 _("MMC in"), DataType::MIDI, ae.make_port_name_non_relative (mmc->input_port()->name())
 463                                 );
 464                 } else {
 465                         sync->add_channel (
 466                                 _("MTC out"), DataType::MIDI, ae.make_port_name_non_relative (midi_manager->mtc_output_port()->name())
 467                                 );
 468                         sync->add_channel (
 469                                 _("MIDI control out"), DataType::MIDI, ae.make_port_name_non_relative (midi_manager->midi_output_port()->name())
 470                                 );
 471                         sync->add_channel (
 472                                 _("MIDI clock out"), DataType::MIDI, ae.make_port_name_non_relative (midi_manager->midi_clock_output_port()->name())
 473                                 );
 474                         sync->add_channel (
 475                                 _("MMC out"), DataType::MIDI, ae.make_port_name_non_relative (mmc->output_port()->name())
 476                                 );
 477                 }
 478
 479                 ardour->add_bundle (sync);
 480         }
 481
 482         /* Now find all other ports that we haven't thought of yet */
 483
 484         std::vector<std::string> extra_system[DataType::num_types];
 485         std::vector<std::string> extra_other[DataType::num_types];
 486
 487         string lpn (PROGRAM_NAME);
 488         boost::to_lower (lpn);
 489         string lpnc = lpn;
 490         lpnc += ':';
 491
 492         const char ** ports = 0;
 493         if (type == DataType::NIL) {
 494                 ports = session->engine().get_ports ("", "", inputs ? JackPortIsInput : JackPortIsOutput);
 495         } else {
 496                 ports = session->engine().get_ports ("", type.to_jack_type(), inputs ? JackPortIsInput : JackPortIsOutput);
 497         }
 498
 499         if (ports) {
 500
 501                 int n = 0;
 502
 503                 while (ports[n]) {
 504
 505                         std::string const p = ports[n];
 506
 507                         if (!system->has_port(p) &&
 508                             !bus->has_port(p) &&
 509                             !track->has_port(p) &&
 510                             !ardour->has_port(p) &&
 511                             !other->has_port(p)) {
 512
 513                                 /* special hack: ignore MIDI ports labelled Midi-Through. these
 514                                    are basically useless and mess things up for default
 515                                    connections.
 516                                 */
 517
 518                                 if (p.find ("Midi-Through") != string::npos) {
 519                                         ++n;
 520                                         continue;
 521                                 }
 522
 523                                 /* special hack: ignore our monitor inputs (which show up here because
 524                                    we excluded them earlier.
 525                                 */
 526
 527                                 string lp = p;
 528                                 boost::to_lower (lp);
 529
 530                                 if ((lp.find (N_(":monitor")) != string::npos) &&
 531                                     (lp.find (lpn) != string::npos)) {
 532                                         ++n;
 533                                         continue;
 534                                 }
 535
 536                                 /* can't use the audio engine for this as we are looking at non-Ardour ports */
 537
 538                                 jack_port_t* jp = jack_port_by_name (session->engine().jack(), p.c_str());
 539                                 if (jp) {
 540                                         DataType t (jack_port_type (jp));
 541                                         if (t != DataType::NIL) {
 542                                                 if (port_has_prefix (p, N_("system:")) ||
 543                                                     port_has_prefix (p, N_("alsa_pcm")) ||
 544                                                     port_has_prefix (p, lpnc)) {
 545                                                         extra_system[t].push_back (p);
 546                                                 } else {
 547                                                         extra_other[t].push_back (p);
 548                                                 }
 549                                         }
 550                                 }
 551                         }
 552
 553                         ++n;
 554                 }
 555
 556                 free (ports);
 557         }
 558
 559         for (DataType::iterator i = DataType::begin(); i != DataType::end(); ++i) {
 560                 if (!extra_system[*i].empty()) {
 561                         boost::shared_ptr<Bundle> b = make_bundle_from_ports (extra_system[*i], *i, inputs);
 562                         boost::shared_ptr<Bundle> bt = bundle_for_type (b, type);
 563                         system->add_bundle (bt);
 564                 }
 565         }
 566
 567         for (DataType::iterator i = DataType::begin(); i != DataType::end(); ++i) {
 568                 if (!extra_other[*i].empty()) {
 569                         boost::shared_ptr<Bundle> b = make_bundle_from_ports (extra_other[*i], *i, inputs);
 570                         boost::shared_ptr<Bundle> bt = bundle_for_type (b, type);
 571                         other->add_bundle (bt);
 572                 }
 573         }
 574
 575         if (!allow_dups) {
 576                 system->remove_duplicates ();
 577         }
 578
 579         add_group_if_not_empty (other);
 580         add_group_if_not_empty (bus);
 581         add_group_if_not_empty (track);
 582         add_group_if_not_empty (ardour);
 583         add_group_if_not_empty (system);
 584
 585         emit_changed ();
 586 }
 587
 588 boost::shared_ptr<Bundle>
 589 PortGroupList::make_bundle_from_ports (std::vector<std::string> const & p, ARDOUR::DataType type, bool inputs) const
 590 {
 591         boost::shared_ptr<Bundle> b (new Bundle ("", inputs));
 592
 593         std::string const pre = common_prefix (p);
 594         if (!pre.empty()) {
 595                 b->set_name (pre.substr (0, pre.length() - 1));
 596         }
 597
 598         for (uint32_t j = 0; j < p.size(); ++j) {
 599                 b->add_channel (p[j].substr (pre.length()), type);
 600                 b->set_port (j, p[j]);
 601         }
 602
 603         return b;
 604 }
 605
 606 bool
 607 PortGroupList::port_has_prefix (const std::string& n, const std::string& p) const
 608 {
 609         return n.substr (0, p.length()) == p;
 610 }
 611
 612 std::string
 613 PortGroupList::common_prefix_before (std::vector<std::string> const & p, std::string const & s) const
 614 {
 615         /* we must have some strings and the first must contain the separator string */
 616         if (p.empty() || p[0].find_first_of (s) == std::string::npos) {
 617                 return "";
 618         }
 619
 620         /* prefix of the first string */
 621         std::string const fp = p[0].substr (0, p[0].find_first_of (s) + 1);
 622
 623         /* see if the other strings also start with fp */
 624         uint32_t j = 1;
 625         while (j < p.size()) {
 626                 if (p[j].substr (0, fp.length()) != fp) {
 627                         break;
 628                 }
 629                 ++j;
 630         }
 631
 632         if (j != p.size()) {
 633                 return "";
 634         }
 635
 636         return fp;
 637 }
 638
 639
 640 std::string
 641 PortGroupList::common_prefix (std::vector<std::string> const & p) const
 642 {
 643         /* common prefix before '/' ? */
 644         std::string cp = common_prefix_before (p, "/");
 645         if (!cp.empty()) {
 646                 return cp;
 647         }
 648
 649         cp = common_prefix_before (p, ":");
 650         if (!cp.empty()) {
 651                 return cp;
 652         }
 653
 654         return "";
 655 }
 656
 657 void
 658 PortGroupList::clear ()
 659 {
 660         _groups.clear ();
 661         _bundle_changed_connections.drop_connections ();
 662         emit_changed ();
 663 }
 664
 665
 666 PortGroup::BundleList const &
 667 PortGroupList::bundles () const
 668 {
 669         _bundles.clear ();
 670
 671         for (PortGroupList::List::const_iterator i = begin (); i != end (); ++i) {
 672                 std::copy ((*i)->bundles().begin(), (*i)->bundles().end(), std::back_inserter (_bundles));
 673         }
 674
 675         return _bundles;
 676 }
 677
 678 ChanCount
 679 PortGroupList::total_channels () const
 680 {
 681         ChanCount n;
 682
 683         for (PortGroupList::List::const_iterator i = begin(); i != end(); ++i) {
 684                 n += (*i)->total_channels ();
 685         }
 686
 687         return n;
 688 }
 689
 690 void
 691 PortGroupList::add_group_if_not_empty (boost::shared_ptr<PortGroup> g)
 692 {
 693         if (!g->bundles().empty ()) {
 694                 add_group (g);
 695         }
 696 }
 697
 698 void
 699 PortGroupList::add_group (boost::shared_ptr<PortGroup> g)
 700 {
 701         _groups.push_back (g);
 702
 703         g->Changed.connect (_changed_connections, invalidator (*this), boost::bind (&PortGroupList::emit_changed, this), gui_context());
 704         g->BundleChanged.connect (_bundle_changed_connections, invalidator (*this), ui_bind (&PortGroupList::emit_bundle_changed, this, _1), gui_context());
 705
 706         emit_changed ();
 707 }
 708
 709 void
 710 PortGroupList::remove_bundle (boost::shared_ptr<Bundle> b)
 711 {
 712         for (List::iterator i = _groups.begin(); i != _groups.end(); ++i) {
 713                 (*i)->remove_bundle (b);
 714         }
 715
 716         emit_changed ();
 717 }
 718
 719 void
 720 PortGroupList::emit_changed ()
 721 {
 722         if (_signals_suspended) {
 723                 _pending_change = true;
 724         } else {
 725                 Changed ();
 726         }
 727 }
 728
 729 void
 730 PortGroupList::emit_bundle_changed (Bundle::Change c)
 731 {
 732         if (_signals_suspended) {
 733                 _pending_bundle_change = c;
 734         } else {
 735                 BundleChanged (c);
 736         }
 737 }
 738 void
 739 PortGroupList::suspend_signals ()
 740 {
 741         _signals_suspended = true;
 742 }
 743
 744 void
 745 PortGroupList::resume_signals ()
 746 {
 747         if (_pending_change) {
 748                 Changed ();
 749                 _pending_change = false;
 750         }
 751
 752         if (_pending_bundle_change != 0) {
 753                 BundleChanged (_pending_bundle_change);
 754                 _pending_bundle_change = (ARDOUR::Bundle::Change) 0;
 755         }
 756
 757         _signals_suspended = false;
 758 }
 759
 760 boost::shared_ptr<IO>
 761 PortGroupList::io_from_bundle (boost::shared_ptr<ARDOUR::Bundle> b) const
 762 {
 763         List::const_iterator i = _groups.begin ();
 764         while (i != _groups.end()) {
 765                 boost::shared_ptr<IO> io = (*i)->io_from_bundle (b);
 766                 if (io) {
 767                         return io;
 768                 }
 769                 ++i;
 770         }
 771
 772         return boost::shared_ptr<IO> ();
 773 }
 774
 775 bool
 776 PortGroupList::empty () const
 777 {
 778         return _groups.empty ();
 779 }
 780
 781 /** Take a bundle, and either return it, if it contains only ports of type \a t,
 782  *  or return a new bundle with those ports from \a b which are of type \a t.
 783  *  Note that t == NIL is taken to mean "all types".
 784  */
 785 boost::shared_ptr<Bundle>
 786 PortGroupList::bundle_for_type (boost::shared_ptr<Bundle> b, DataType t) const
 787 {
 788         /* We are asked for a bundle with all types, so that's easy */
 789         if (t == DataType::NIL) {
 790                 return b;
 791         }
 792
 793         if (b->nchannels().get(t) == b->nchannels().n_total()) {
 794                 /* All channels on b are of the correct type, so just return b */
 795                 return b;
 796         }
 797
 798         /* We must build a new bundle */
 799         boost::shared_ptr<Bundle> n (new ARDOUR::Bundle (b->name(), b->ports_are_inputs()));
 800         for (uint32_t i = 0; i < b->nchannels().n_total(); ++i) {
 801                 if (b->channel_type(i) == t) {
 802                         n->add_channel (b->channel_name (i), t, b->channel_ports (i));
 803                 }
 804         }
 805
 806         return n;
 807 }