libs/ardour/io.cc

   1 /*
   2     Copyright (C) 2000-2006 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 #include <algorithm>
  20 #include <cmath>
  21 #include <vector>
  22
  23 #include <unistd.h>
  24 #include <locale.h>
  25 #include <errno.h>
  26
  27 #include <glibmm.h>
  28 #include <glibmm/threads.h>
  29
  30 #include "pbd/xml++.h"
  31 #include "pbd/replace_all.h"
  32 #include "pbd/unknown_type.h"
  33 #include "pbd/enumwriter.h"
  34 #include "pbd/locale_guard.h"
  35 #include "pbd/types_convert.h"
  36
  37 #include "ardour/audioengine.h"
  38 #include "ardour/buffer.h"
  39 #include "ardour/buffer_set.h"
  40 #include "ardour/debug.h"
  41 #include "ardour/io.h"
  42 #include "ardour/port.h"
  43 #include "ardour/profile.h"
  44 #include "ardour/route.h"
  45 #include "ardour/session.h"
  46 #include "ardour/types_convert.h"
  47 #include "ardour/user_bundle.h"
  48
  49 #include "pbd/i18n.h"
  50
  51 #define BLOCK_PROCESS_CALLBACK() Glib::Threads::Mutex::Lock em (AudioEngine::instance()->process_lock())
  52
  53 using namespace std;
  54 using namespace ARDOUR;
  55 using namespace PBD;
  56
  57 const string                 IO::state_node_name = "IO";
  58 bool                         IO::connecting_legal = false;
  59 PBD::Signal0<int>            IO::ConnectingLegal;
  60 PBD::Signal1<void,ChanCount> IO::PortCountChanged;
  61
  62 /** @param default_type The type of port that will be created by ensure_io
  63  * and friends if no type is explicitly requested (to avoid breakage).
  64  */
  65 IO::IO (Session& s, const string& name, Direction dir, DataType default_type, bool sendish)
  66         : SessionObject (s, name)
  67         , _direction (dir)
  68         , _default_type (default_type)
  69         , _sendish (sendish)
  70 {
  71         _active = true;
  72         Port::PostDisconnect.connect_same_thread (*this, boost::bind (&IO::disconnect_check, this, _1, _2));
  73         pending_state_node = 0;
  74         setup_bundle ();
  75 }
  76
  77 IO::IO (Session& s, const XMLNode& node, DataType dt, bool sendish)
  78         : SessionObject(s, "unnamed io")
  79         , _direction (Input)
  80         , _default_type (dt)
  81         , _sendish (sendish)
  82 {
  83         _active = true;
  84         pending_state_node = 0;
  85         Port::PostDisconnect.connect_same_thread (*this, boost::bind (&IO::disconnect_check, this, _1, _2));
  86
  87         set_state (node, Stateful::loading_state_version);
  88         setup_bundle ();
  89 }
  90
  91 IO::~IO ()
  92 {
  93         Glib::Threads::Mutex::Lock lm (io_lock);
  94
  95         DEBUG_TRACE (DEBUG::Ports, string_compose ("IO %1 unregisters %2 ports\n", name(), _ports.num_ports()));
  96
  97         BLOCK_PROCESS_CALLBACK ();
  98
  99         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 100                 _session.engine().unregister_port (*i);
 101         }
 102         delete pending_state_node; pending_state_node = 0;
 103 }
 104
 105 void
 106 IO::disconnect_check (boost::shared_ptr<Port> a, boost::shared_ptr<Port> b)
 107 {
 108         if (_session.state_of_the_state () & Session::Deletion) {
 109                 return;
 110         }
 111         /* this could be called from within our own ::disconnect() method(s)
 112            or from somewhere that operates directly on a port. so, we don't
 113            know for sure if we can take this lock or not. if we fail,
 114            we assume that its safely locked by our own ::disconnect().
 115         */
 116
 117         Glib::Threads::Mutex::Lock tm (io_lock, Glib::Threads::TRY_LOCK);
 118
 119         if (tm.locked()) {
 120                 /* we took the lock, so we cannot be here from inside
 121                  * ::disconnect()
 122                  */
 123                 if (_ports.contains (a) || _ports.contains (b)) {
 124                         changed (IOChange (IOChange::ConnectionsChanged), this); /* EMIT SIGNAL */
 125                 }
 126         } else {
 127                 /* we didn't get the lock, so assume that we're inside
 128                  * ::disconnect(), and it will call changed() appropriately.
 129                  */
 130         }
 131 }
 132
 133 void
 134 IO::increment_port_buffer_offset (pframes_t offset)
 135 {
 136         /* io_lock, not taken: function must be called from Session::process() calltree */
 137
 138         if (_direction == Output) {
 139                 for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 140                         i->increment_port_buffer_offset (offset);
 141                 }
 142         }
 143 }
 144
 145 void
 146 IO::silence (framecnt_t nframes)
 147 {
 148         /* io_lock, not taken: function must be called from Session::process() calltree */
 149
 150         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 151                 i->get_buffer(nframes).silence (nframes);
 152         }
 153 }
 154
 155 /** Set _bundles_connected to those bundles that are connected such that every
 156  *  port on every bundle channel x is connected to port x in _ports.
 157  */
 158 void
 159 IO::check_bundles_connected ()
 160 {
 161         std::vector<UserBundleInfo*> new_list;
 162
 163         for (std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin(); i != _bundles_connected.end(); ++i) {
 164
 165                 uint32_t const N = (*i)->bundle->nchannels().n_total();
 166
 167                 if (_ports.num_ports() < N) {
 168                         continue;
 169                 }
 170
 171                 bool ok = true;
 172
 173                 for (uint32_t j = 0; j < N; ++j) {
 174                         /* Every port on bundle channel j must be connected to our input j */
 175                         Bundle::PortList const pl = (*i)->bundle->channel_ports (j);
 176                         for (uint32_t k = 0; k < pl.size(); ++k) {
 177                                 if (_ports.port(j)->connected_to (pl[k]) == false) {
 178                                         ok = false;
 179                                         break;
 180                                 }
 181                         }
 182
 183                         if (ok == false) {
 184                                 break;
 185                         }
 186                 }
 187
 188                 if (ok) {
 189                         new_list.push_back (*i);
 190                 } else {
 191                         delete *i;
 192                 }
 193         }
 194
 195         _bundles_connected = new_list;
 196 }
 197
 198
 199 int
 200 IO::disconnect (boost::shared_ptr<Port> our_port, string other_port, void* src)
 201 {
 202         if (other_port.length() == 0 || our_port == 0) {
 203                 return 0;
 204         }
 205
 206         {
 207                 Glib::Threads::Mutex::Lock lm (io_lock);
 208
 209                 /* check that our_port is really one of ours */
 210
 211                 if ( ! _ports.contains(our_port)) {
 212                         return -1;
 213                 }
 214
 215                 /* disconnect it from the source */
 216
 217                 if (our_port->disconnect (other_port)) {
 218                         error << string_compose(_("IO: cannot disconnect port %1 from %2"), our_port->name(), other_port) << endmsg;
 219                         return -1;
 220                 }
 221
 222                 check_bundles_connected ();
 223         }
 224
 225         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
 226
 227         _session.set_dirty ();
 228
 229         return 0;
 230 }
 231
 232 int
 233 IO::connect (boost::shared_ptr<Port> our_port, string other_port, void* src)
 234 {
 235         if (other_port.length() == 0 || our_port == 0) {
 236                 return 0;
 237         }
 238
 239         {
 240                 Glib::Threads::Mutex::Lock lm (io_lock);
 241
 242                 /* check that our_port is really one of ours */
 243
 244                 if ( ! _ports.contains(our_port) ) {
 245                         return -1;
 246                 }
 247
 248                 /* connect it to the source */
 249
 250                 if (our_port->connect (other_port)) {
 251                         return -1;
 252                 }
 253         }
 254         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
 255         _session.set_dirty ();
 256         return 0;
 257 }
 258
 259 int
 260 IO::remove_port (boost::shared_ptr<Port> port, void* src)
 261 {
 262         ChanCount before = _ports.count ();
 263         ChanCount after = before;
 264         after.set (port->type(), after.get (port->type()) - 1);
 265
 266         boost::optional<bool> const r = PortCountChanging (after); /* EMIT SIGNAL */
 267         if (r.get_value_or (false)) {
 268                 return -1;
 269         }
 270
 271         IOChange change;
 272
 273         {
 274                 BLOCK_PROCESS_CALLBACK ();
 275
 276                 {
 277                         Glib::Threads::Mutex::Lock lm (io_lock);
 278
 279                         if (_ports.remove(port)) {
 280                                 change.type = IOChange::Type (change.type | IOChange::ConfigurationChanged);
 281                                 change.before = before;
 282                                 change.after = _ports.count ();
 283
 284                                 if (port->connected()) {
 285                                         change.type = IOChange::Type (change.type | IOChange::ConnectionsChanged);
 286                                 }
 287
 288                                 _session.engine().unregister_port (port);
 289                                 check_bundles_connected ();
 290                         }
 291                 }
 292
 293                 PortCountChanged (n_ports()); /* EMIT SIGNAL */
 294
 295                 if (change.type != IOChange::NoChange) {
 296                         changed (change, src);
 297                         _buffers.attach_buffers (_ports);
 298                 }
 299         }
 300
 301         if (change.type & IOChange::ConfigurationChanged) {
 302                 setup_bundle ();
 303         }
 304
 305         if (change.type == IOChange::NoChange) {
 306                 return -1;
 307         }
 308
 309         _session.set_dirty ();
 310
 311         return 0;
 312 }
 313
 314 /** Add a port.
 315  *
 316  * @param destination Name of port to connect new port to.
 317  * @param src Source for emitted ConfigurationChanged signal.
 318  * @param type Data type of port.  Default value (NIL) will use this IO's default type.
 319  */
 320 int
 321 IO::add_port (string destination, void* src, DataType type)
 322 {
 323         boost::shared_ptr<Port> our_port;
 324
 325         if (type == DataType::NIL) {
 326                 type = _default_type;
 327         }
 328
 329         ChanCount before = _ports.count ();
 330         ChanCount after = before;
 331         after.set (type, after.get (type) + 1);
 332
 333         bool const r = PortCountChanging (after); /* EMIT SIGNAL */
 334         if (r) {
 335                 return -1;
 336         }
 337
 338         IOChange change;
 339
 340         {
 341                 BLOCK_PROCESS_CALLBACK ();
 342
 343
 344                 {
 345                         Glib::Threads::Mutex::Lock lm (io_lock);
 346
 347                         /* Create a new port */
 348
 349                         string portname = build_legal_port_name (type);
 350
 351                         if (_direction == Input) {
 352                                 if ((our_port = _session.engine().register_input_port (type, portname)) == 0) {
 353                                         error << string_compose(_("IO: cannot register input port %1"), portname) << endmsg;
 354                                         return -1;
 355                                 }
 356                         } else {
 357                                 if ((our_port = _session.engine().register_output_port (type, portname)) == 0) {
 358                                         error << string_compose(_("IO: cannot register output port %1"), portname) << endmsg;
 359                                         return -1;
 360                                 }
 361                         }
 362
 363                         change.before = _ports.count ();
 364                         _ports.add (our_port);
 365                 }
 366
 367                 PortCountChanged (n_ports()); /* EMIT SIGNAL */
 368                 change.type = IOChange::ConfigurationChanged;
 369                 change.after = _ports.count ();
 370                 changed (change, src); /* EMIT SIGNAL */
 371                 _buffers.attach_buffers (_ports);
 372         }
 373
 374         if (!destination.empty()) {
 375                 if (our_port->connect (destination)) {
 376                         return -1;
 377                 }
 378         }
 379
 380         apply_pretty_name ();
 381         setup_bundle ();
 382         _session.set_dirty ();
 383
 384         return 0;
 385 }
 386
 387 int
 388 IO::disconnect (void* src)
 389 {
 390         {
 391                 Glib::Threads::Mutex::Lock lm (io_lock);
 392
 393                 for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 394                         i->disconnect_all ();
 395                 }
 396
 397                 check_bundles_connected ();
 398         }
 399
 400         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
 401
 402         return 0;
 403 }
 404
 405 /** Caller must hold process lock */
 406 int
 407 IO::ensure_ports_locked (ChanCount count, bool clear, bool& changed)
 408 {
 409 #ifndef PLATFORM_WINDOWS
 410         assert (!AudioEngine::instance()->process_lock().trylock());
 411 #endif
 412
 413         boost::shared_ptr<Port> port;
 414         vector<boost::shared_ptr<Port> > deleted_ports;
 415
 416         changed    = false;
 417
 418         for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
 419
 420                 const size_t n = count.get(*t);
 421
 422                 /* remove unused ports */
 423                 for (size_t i = n_ports().get(*t); i > n; --i) {
 424                         port = _ports.port(*t, i-1);
 425
 426                         assert(port);
 427                         _ports.remove(port);
 428
 429                         /* hold a reference to the port so that we can ensure
 430                          * that this thread, and not a JACK notification thread,
 431                          * holds the final reference.
 432                          */
 433
 434                         deleted_ports.push_back (port);
 435                         _session.engine().unregister_port (port);
 436
 437                         changed = true;
 438                 }
 439
 440                 /* this will drop the final reference to the deleted ports,
 441                  * which will in turn call their destructors, which will in
 442                  * turn call the backend to unregister them.
 443                  *
 444                  * There will no connect/disconnect or register/unregister
 445                  * callbacks from the backend until we get here, because
 446                  * they are driven by the Port destructor. The destructor
 447                  * will not execute until we drop the final reference,
 448                  * which all happens right .... here.
 449                  */
 450                 deleted_ports.clear ();
 451
 452                 /* create any necessary new ports */
 453                 while (n_ports().get(*t) < n) {
 454
 455                         string portname = build_legal_port_name (*t);
 456
 457                         try {
 458
 459                                 if (_direction == Input) {
 460                                         if ((port = _session.engine().register_input_port (*t, portname)) == 0) {
 461                                                 error << string_compose(_("IO: cannot register input port %1"), portname) << endmsg;
 462                                                 return -1;
 463                                         }
 464                                 } else {
 465                                         if ((port = _session.engine().register_output_port (*t, portname)) == 0) {
 466                                                 error << string_compose(_("IO: cannot register output port %1"), portname) << endmsg;
 467                                                 return -1;
 468                                         }
 469                                 }
 470                         }
 471
 472                         catch (AudioEngine::PortRegistrationFailure& err) {
 473                                 /* pass it on */
 474                                 throw;
 475                         }
 476
 477                         _ports.add (port);
 478                         changed = true;
 479                 }
 480         }
 481
 482         if (changed) {
 483                 check_bundles_connected ();
 484                 PortCountChanged (n_ports()); /* EMIT SIGNAL */
 485                 _session.set_dirty ();
 486         }
 487
 488         if (clear) {
 489                 /* disconnect all existing ports so that we get a fresh start */
 490                 for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 491                         i->disconnect_all ();
 492                 }
 493         }
 494
 495         return 0;
 496 }
 497
 498 /** Caller must hold process lock */
 499 int
 500 IO::ensure_ports (ChanCount count, bool clear, void* src)
 501 {
 502 #ifndef PLATFORM_WINDOWS
 503         assert (!AudioEngine::instance()->process_lock().trylock());
 504 #endif
 505
 506         bool changed = false;
 507
 508         if (count == n_ports() && !clear) {
 509                 return 0;
 510         }
 511
 512         IOChange change;
 513
 514         change.before = _ports.count ();
 515
 516         {
 517                 Glib::Threads::Mutex::Lock im (io_lock);
 518                 if (ensure_ports_locked (count, clear, changed)) {
 519                         return -1;
 520                 }
 521         }
 522
 523         if (changed) {
 524                 change.after = _ports.count ();
 525                 change.type = IOChange::ConfigurationChanged;
 526                 this->changed (change, src); /* EMIT SIGNAL */
 527                 _buffers.attach_buffers (_ports);
 528                 setup_bundle ();
 529                 _session.set_dirty ();
 530         }
 531
 532         return 0;
 533 }
 534
 535 /** Caller must hold process lock */
 536 int
 537 IO::ensure_io (ChanCount count, bool clear, void* src)
 538 {
 539 #ifndef PLATFORM_WINDOWS
 540         assert (!AudioEngine::instance()->process_lock().trylock());
 541 #endif
 542
 543         return ensure_ports (count, clear, src);
 544 }
 545
 546 XMLNode&
 547 IO::get_state ()
 548 {
 549         return state (true);
 550 }
 551
 552 XMLNode&
 553 IO::state (bool /*full_state*/)
 554 {
 555         XMLNode* node = new XMLNode (state_node_name);
 556         int n;
 557         Glib::Threads::Mutex::Lock lm (io_lock);
 558
 559         node->set_property ("name", name());
 560         node->set_property ("id", id ());
 561         node->set_property ("direction", _direction);
 562         node->set_property ("default-type", _default_type);
 563
 564         if (!_pretty_name_prefix.empty ()) {
 565                 node->set_property("pretty-name", _pretty_name_prefix);
 566         }
 567
 568         for (std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin(); i != _bundles_connected.end(); ++i) {
 569                 XMLNode* n = new XMLNode ("Bundle");
 570                 n->set_property ("name", (*i)->bundle->name ());
 571                 node->add_child_nocopy (*n);
 572         }
 573
 574         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 575
 576                 vector<string> connections;
 577
 578                 XMLNode* pnode = new XMLNode (X_("Port"));
 579                 pnode->set_property (X_("type"), i->type());
 580                 pnode->set_property (X_("name"), i->name());
 581
 582                 if (i->get_connections (connections)) {
 583                         vector<string>::const_iterator ci;
 584                         std::sort (connections.begin(), connections.end());
 585
 586                         for (n = 0, ci = connections.begin(); ci != connections.end(); ++ci, ++n) {
 587
 588                                 /* if its a connection to our own port,
 589                                    return only the port name, not the
 590                                    whole thing. this allows connections
 591                                    to be re-established even when our
 592                                    client name is different.
 593                                 */
 594
 595                                 XMLNode* cnode = new XMLNode (X_("Connection"));
 596
 597                                 cnode->set_property (X_("other"), _session.engine().make_port_name_relative (*ci));
 598                                 pnode->add_child_nocopy (*cnode);
 599                         }
 600                 }
 601
 602                 node->add_child_nocopy (*pnode);
 603         }
 604
 605         node->set_property (X_("user-latency"), _user_latency);
 606
 607         return *node;
 608 }
 609
 610 int
 611 IO::set_state (const XMLNode& node, int version)
 612 {
 613         /* callers for version < 3000 need to call set_state_2X directly, as A3 IOs
 614          * are input OR output, not both, so the direction needs to be specified
 615          * by the caller.
 616          */
 617         assert (version >= 3000);
 618
 619         /* force use of non-localized representation of decimal point,
 620            since we use it a lot in XML files and so forth.
 621         */
 622
 623         if (node.name() != state_node_name) {
 624                 error << string_compose(_("incorrect XML node \"%1\" passed to IO object"), node.name()) << endmsg;
 625                 return -1;
 626         }
 627
 628         bool ignore_name = node.property ("ignore-name");
 629         std::string name;
 630         if (node.get_property ("name", name) && !ignore_name) {
 631                 set_name (name);
 632         }
 633
 634         if (node.get_property (X_("default-type"), _default_type)) {
 635                 assert(_default_type != DataType::NIL);
 636         }
 637
 638         set_id (node);
 639
 640         node.get_property ("direction", _direction);
 641
 642         if (create_ports (node, version)) {
 643                 return -1;
 644         }
 645
 646         // after create_ports, updates names
 647         if (node.get_property ("pretty-name", name)) {
 648                 set_pretty_name (name);
 649         }
 650
 651         if (connecting_legal) {
 652
 653                 if (make_connections (node, version, false)) {
 654                         return -1;
 655                 }
 656
 657         } else {
 658
 659                 delete pending_state_node;
 660                 pending_state_node = new XMLNode (node);
 661                 pending_state_node_version = version;
 662                 pending_state_node_in = false;
 663                 ConnectingLegal.connect_same_thread (connection_legal_c, boost::bind (&IO::connecting_became_legal, this));
 664         }
 665
 666         node.get_property ("user-latency", _user_latency);
 667
 668         return 0;
 669 }
 670
 671 int
 672 IO::set_state_2X (const XMLNode& node, int version, bool in)
 673 {
 674         XMLProperty const * prop;
 675         XMLNodeConstIterator iter;
 676         LocaleGuard lg;
 677
 678         /* force use of non-localized representation of decimal point,
 679            since we use it a lot in XML files and so forth.
 680         */
 681
 682         if (node.name() != state_node_name) {
 683                 error << string_compose(_("incorrect XML node \"%1\" passed to IO object"), node.name()) << endmsg;
 684                 return -1;
 685         }
 686
 687         if ((prop = node.property ("name")) != 0) {
 688                 set_name (prop->value());
 689         }
 690
 691         if ((prop = node.property (X_("default-type"))) != 0) {
 692                 _default_type = DataType(prop->value());
 693                 assert(_default_type != DataType::NIL);
 694         }
 695
 696         set_id (node);
 697
 698         _direction = in ? Input : Output;
 699
 700         if (create_ports (node, version)) {
 701                 return -1;
 702         }
 703
 704         if (connecting_legal) {
 705
 706                 if (make_connections_2X (node, version, in)) {
 707                         return -1;
 708                 }
 709
 710         } else {
 711
 712                 delete pending_state_node;
 713                 pending_state_node = new XMLNode (node);
 714                 pending_state_node_version = version;
 715                 pending_state_node_in = in;
 716                 ConnectingLegal.connect_same_thread (connection_legal_c, boost::bind (&IO::connecting_became_legal, this));
 717         }
 718
 719         return 0;
 720 }
 721
 722 int
 723 IO::connecting_became_legal ()
 724 {
 725         int ret = 0;
 726
 727         assert (pending_state_node);
 728
 729         connection_legal_c.disconnect ();
 730
 731     // it's not required for TracksLive, as long as TracksLive's session does all the connections when it's being loaded
 732     if (!Profile->get_trx() ) {
 733         ret = make_connections (*pending_state_node, pending_state_node_version, pending_state_node_in);
 734     }
 735
 736         delete pending_state_node;
 737         pending_state_node = 0;
 738
 739         return ret;
 740 }
 741
 742 boost::shared_ptr<Bundle>
 743 IO::find_possible_bundle (const string &desired_name)
 744 {
 745         static const string digits = "0123456789";
 746         const string &default_name = (_direction == Input ? _("in") : _("out"));
 747         const string &bundle_type_name = (_direction == Input ? _("input") : _("output"));
 748
 749         boost::shared_ptr<Bundle> c = _session.bundle_by_name (desired_name);
 750
 751         if (!c) {
 752                 int bundle_number, mask;
 753                 string possible_name;
 754                 bool stereo = false;
 755                 string::size_type last_non_digit_pos;
 756                 std::string bundle_number_str;
 757
 758                 error << string_compose(_("Unknown bundle \"%1\" listed for %2 of %3"), desired_name, bundle_type_name, _name)
 759                       << endmsg;
 760
 761                 // find numeric suffix of desired name
 762                 bundle_number = 0;
 763
 764                 last_non_digit_pos = desired_name.find_last_not_of(digits);
 765
 766                 if (last_non_digit_pos != string::npos) {
 767                         bundle_number_str = desired_name.substr(last_non_digit_pos);
 768                         bundle_number = string_to<int32_t>(bundle_number_str);
 769                 }
 770
 771                 // see if it's a stereo connection e.g. "in 3+4"
 772
 773                 if (last_non_digit_pos > 1 && desired_name[last_non_digit_pos] == '+') {
 774                         string::size_type left_last_non_digit_pos;
 775
 776                         left_last_non_digit_pos = desired_name.find_last_not_of(digits, last_non_digit_pos-1);
 777
 778                         if (left_last_non_digit_pos != string::npos) {
 779                                 int left_bundle_number = 0;
 780                                 bundle_number_str = desired_name.substr(left_last_non_digit_pos, last_non_digit_pos-1);
 781                                 left_bundle_number = string_to<int32_t>(bundle_number_str);
 782
 783                                 if (left_bundle_number > 0 && left_bundle_number + 1 == bundle_number) {
 784                                         bundle_number--;
 785                                         stereo = true;
 786                                 }
 787                         }
 788                 }
 789
 790                 // make 0-based
 791                 if (bundle_number)
 792                         bundle_number--;
 793
 794                 // find highest set bit
 795                 mask = 1;
 796                 while ((mask <= bundle_number) && (mask <<= 1)) {}
 797
 798                 // "wrap" bundle number into largest possible power of 2
 799                 // that works...
 800
 801                 while (mask) {
 802
 803                         if (bundle_number & mask) {
 804                                 bundle_number &= ~mask;
 805
 806                                 std::string possible_name = default_name + " " + to_string(bundle_number + 1);
 807
 808                                 if (stereo) {
 809                                         possible_name += "+" + to_string(bundle_number + 2);
 810                                 }
 811
 812                                 if ((c = _session.bundle_by_name (possible_name)) != 0) {
 813                                         break;
 814                                 }
 815                         }
 816                         mask >>= 1;
 817                 }
 818                 if (c) {
 819                         info << string_compose (_("Bundle %1 was not available - \"%2\" used instead"), desired_name, possible_name)
 820                              << endmsg;
 821                 } else {
 822                         error << string_compose(_("No %1 bundles available as a replacement"), bundle_type_name)
 823                               << endmsg;
 824                 }
 825
 826         }
 827
 828         return c;
 829
 830 }
 831
 832 int
 833 IO::get_port_counts_2X (XMLNode const & node, int /*version*/, ChanCount& n, boost::shared_ptr<Bundle>& /*c*/)
 834 {
 835         XMLProperty const * prop;
 836         XMLNodeList children = node.children ();
 837
 838         uint32_t n_audio = 0;
 839
 840         for (XMLNodeIterator i = children.begin(); i != children.end(); ++i) {
 841
 842                 if ((prop = node.property ("inputs")) != 0 && _direction == Input) {
 843                         n_audio = count (prop->value().begin(), prop->value().end(), '{');
 844                 } else if ((prop = node.property ("input-connection")) != 0 && _direction == Input) {
 845                         n_audio = 1;
 846                 } else if ((prop = node.property ("outputs")) != 0 && _direction == Output) {
 847                         n_audio = count (prop->value().begin(), prop->value().end(), '{');
 848                 } else if ((prop = node.property ("output-connection")) != 0 && _direction == Output) {
 849                         n_audio = 2;
 850                 }
 851         }
 852
 853         ChanCount cnt;
 854         cnt.set_audio (n_audio);
 855         n = ChanCount::max (n, cnt);
 856
 857         return 0;
 858 }
 859
 860 int
 861 IO::get_port_counts (const XMLNode& node, int version, ChanCount& n, boost::shared_ptr<Bundle>& c)
 862 {
 863         if (version < 3000) {
 864                 return get_port_counts_2X (node, version, n, c);
 865         }
 866
 867         XMLProperty const * prop;
 868         XMLNodeConstIterator iter;
 869         uint32_t n_audio = 0;
 870         uint32_t n_midi = 0;
 871         ChanCount cnt;
 872
 873         n = n_ports();
 874
 875         if ((prop = node.property ("connection")) != 0) {
 876
 877                 if ((c = find_possible_bundle (prop->value())) != 0) {
 878                         n = ChanCount::max (n, c->nchannels());
 879                 }
 880                 return 0;
 881         }
 882
 883         for (iter = node.children().begin(); iter != node.children().end(); ++iter) {
 884
 885                 if ((*iter)->name() == X_("Bundle")) {
 886                         prop = (*iter)->property ("name");
 887                         if ((c = find_possible_bundle (prop->value())) != 0) {
 888                                 n = ChanCount::max (n, c->nchannels());
 889                                 return 0;
 890                         } else {
 891                                 return -1;
 892                         }
 893                 }
 894
 895                 if ((*iter)->name() == X_("Port")) {
 896                         prop = (*iter)->property (X_("type"));
 897
 898                         if (!prop) {
 899                                 continue;
 900                         }
 901
 902                         if (prop->value() == X_("audio")) {
 903                                 cnt.set_audio (++n_audio);
 904                         } else if (prop->value() == X_("midi")) {
 905                                 cnt.set_midi (++n_midi);
 906                         }
 907                 }
 908         }
 909
 910         n = ChanCount::max (n, cnt);
 911         return 0;
 912 }
 913
 914 int
 915 IO::create_ports (const XMLNode& node, int version)
 916 {
 917         ChanCount n;
 918         boost::shared_ptr<Bundle> c;
 919
 920         get_port_counts (node, version, n, c);
 921
 922         {
 923                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 924
 925                 if (ensure_ports (n, true, this)) {
 926                         error << string_compose(_("%1: cannot create I/O ports"), _name) << endmsg;
 927                         return -1;
 928                 }
 929         }
 930
 931         /* XXX use c */
 932
 933         return 0;
 934 }
 935
 936 int
 937 IO::make_connections (const XMLNode& node, int version, bool in)
 938 {
 939         if (version < 3000) {
 940                 return make_connections_2X (node, version, in);
 941         }
 942
 943         XMLProperty const * prop;
 944
 945         for (XMLNodeConstIterator i = node.children().begin(); i != node.children().end(); ++i) {
 946
 947                 if ((*i)->name() == "Bundle") {
 948                         XMLProperty const * prop = (*i)->property ("name");
 949                         if (prop) {
 950                                 boost::shared_ptr<Bundle> b = find_possible_bundle (prop->value());
 951                                 if (b) {
 952                                         connect_ports_to_bundle (b, true, this);
 953                                 }
 954                         }
 955
 956                         return 0;
 957                 }
 958
 959                 if ((*i)->name() == "Port") {
 960
 961                         prop = (*i)->property (X_("name"));
 962
 963                         if (!prop) {
 964                                 continue;
 965                         }
 966
 967                         boost::shared_ptr<Port> p = port_by_name (prop->value());
 968
 969                         if (p) {
 970                                 for (XMLNodeConstIterator c = (*i)->children().begin(); c != (*i)->children().end(); ++c) {
 971
 972                                         XMLNode* cnode = (*c);
 973
 974                                         if (cnode->name() != X_("Connection")) {
 975                                                 continue;
 976                                         }
 977
 978                                         if ((prop = cnode->property (X_("other"))) == 0) {
 979                                                 continue;
 980                                         }
 981
 982                                         if (prop) {
 983                                                 connect (p, prop->value(), this);
 984                                         }
 985                                 }
 986                         }
 987                 }
 988         }
 989
 990         return 0;
 991 }
 992
 993 void
 994 IO::prepare_for_reset (XMLNode& node, const std::string& name)
 995 {
 996         /* reset name */
 997         node.set_property ("name", name);
 998
 999         /* now find connections and reset the name of the port
1000            in one so that when we re-use it it will match
1001            the name of the thing we're applying it to.
1002         */
1003
1004         XMLProperty * prop;
1005         XMLNodeList children = node.children();
1006
1007         for (XMLNodeIterator i = children.begin(); i != children.end(); ++i) {
1008
1009                 if ((*i)->name() == "Port") {
1010
1011                         prop = (*i)->property (X_("name"));
1012
1013                         if (prop) {
1014                                 string new_name;
1015                                 string old = prop->value();
1016                                 string::size_type slash = old.find ('/');
1017
1018                                 if (slash != string::npos) {
1019                                         /* port name is of form: <IO-name>/<port-name> */
1020
1021                                         new_name = name;
1022                                         new_name += old.substr (old.find ('/'));
1023
1024                                         prop->set_value (new_name);
1025                                 }
1026                         }
1027                 }
1028         }
1029 }
1030
1031
1032 int
1033 IO::make_connections_2X (const XMLNode& node, int /*version*/, bool in)
1034 {
1035         XMLProperty const * prop;
1036
1037         /* XXX: bundles ("connections" as was) */
1038
1039         if ((prop = node.property ("inputs")) != 0 && in) {
1040
1041                 string::size_type ostart = 0;
1042                 string::size_type start = 0;
1043                 string::size_type end = 0;
1044                 int i = 0;
1045                 int n;
1046                 vector<string> ports;
1047
1048                 string const str = prop->value ();
1049
1050                 while ((start = str.find_first_of ('{', ostart)) != string::npos) {
1051                         start += 1;
1052
1053                         if ((end = str.find_first_of ('}', start)) == string::npos) {
1054                                 error << string_compose(_("IO: badly formed string in XML node for inputs \"%1\""), str) << endmsg;
1055                                 return -1;
1056                         }
1057
1058                         if ((n = parse_io_string (str.substr (start, end - start), ports)) < 0) {
1059                                 error << string_compose(_("bad input string in XML node \"%1\""), str) << endmsg;
1060
1061                                 return -1;
1062
1063                         } else if (n > 0) {
1064
1065
1066                                 for (int x = 0; x < n; ++x) {
1067                                         /* XXX: this is a bit of a hack; need to check if it's always valid */
1068                                         string::size_type const p = ports[x].find ("/out");
1069                                         if (p != string::npos) {
1070                                                 ports[x].replace (p, 4, "/audio_out");
1071                                         }
1072                                         if (NULL != nth(i).get())
1073                                                 nth(i)->connect (ports[x]);
1074                                 }
1075                         }
1076
1077                         ostart = end+1;
1078                         i++;
1079                 }
1080
1081         }
1082
1083         if ((prop = node.property ("outputs")) != 0 && !in) {
1084
1085                 string::size_type ostart = 0;
1086                 string::size_type start = 0;
1087                 string::size_type end = 0;
1088                 int i = 0;
1089                 int n;
1090                 vector<string> ports;
1091
1092                 string const str = prop->value ();
1093
1094                 while ((start = str.find_first_of ('{', ostart)) != string::npos) {
1095                         start += 1;
1096
1097                         if ((end = str.find_first_of ('}', start)) == string::npos) {
1098                                 error << string_compose(_("IO: badly formed string in XML node for outputs \"%1\""), str) << endmsg;
1099                                 return -1;
1100                         }
1101
1102                         if ((n = parse_io_string (str.substr (start, end - start), ports)) < 0) {
1103                                 error << string_compose(_("IO: bad output string in XML node \"%1\""), str) << endmsg;
1104
1105                                 return -1;
1106
1107                         } else if (n > 0) {
1108
1109                                 for (int x = 0; x < n; ++x) {
1110                                         /* XXX: this is a bit of a hack; need to check if it's always valid */
1111                                         string::size_type const p = ports[x].find ("/in");
1112                                         if (p != string::npos) {
1113                                                 ports[x].replace (p, 3, "/audio_in");
1114                                         }
1115                                         if (NULL != nth(i).get())
1116                                                 nth(i)->connect (ports[x]);
1117                                 }
1118                         }
1119
1120                         ostart = end+1;
1121                         i++;
1122                 }
1123         }
1124
1125         return 0;
1126 }
1127
1128 int
1129 IO::set_ports (const string& str)
1130 {
1131         vector<string> ports;
1132         int n;
1133         uint32_t nports;
1134
1135         if ((nports = count (str.begin(), str.end(), '{')) == 0) {
1136                 return 0;
1137         }
1138
1139         {
1140                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
1141
1142                 // FIXME: audio-only
1143                 if (ensure_ports (ChanCount(DataType::AUDIO, nports), true, this)) {
1144                         return -1;
1145                 }
1146         }
1147
1148         string::size_type start  = 0;
1149         string::size_type end    = 0;
1150         string::size_type ostart = 0;
1151         for (int i = 0; (start = str.find_first_of ('{', ostart)) != string::npos; ++i) {
1152                 start += 1;
1153
1154                 if ((end = str.find_first_of ('}', start)) == string::npos) {
1155                         error << string_compose(_("IO: badly formed string in XML node for inputs \"%1\""), str) << endmsg;
1156                         return -1;
1157                 }
1158
1159                 if ((n = parse_io_string (str.substr (start, end - start), ports)) < 0) {
1160                         error << string_compose(_("bad input string in XML node \"%1\""), str) << endmsg;
1161
1162                         return -1;
1163
1164                 } else if (n > 0) {
1165
1166                         for (int x = 0; x < n; ++x) {
1167                                 connect (nth (i), ports[x], this);
1168                         }
1169                 }
1170
1171                 ostart = end+1;
1172         }
1173
1174         return 0;
1175 }
1176
1177 int
1178 IO::parse_io_string (const string& str, vector<string>& ports)
1179 {
1180         string::size_type pos, opos;
1181
1182         if (str.length() == 0) {
1183                 return 0;
1184         }
1185
1186         opos = 0;
1187
1188         ports.clear ();
1189
1190         while ((pos = str.find_first_of (',', opos)) != string::npos) {
1191                 ports.push_back (str.substr (opos, pos - opos));
1192                 opos = pos + 1;
1193         }
1194
1195         if (opos < str.length()) {
1196                 ports.push_back (str.substr(opos));
1197         }
1198
1199         return ports.size();
1200 }
1201
1202 int
1203 IO::parse_gain_string (const string& str, vector<string>& ports)
1204 {
1205         string::size_type pos, opos;
1206
1207         opos = 0;
1208         ports.clear ();
1209
1210         while ((pos = str.find_first_of (',', opos)) != string::npos) {
1211                 ports.push_back (str.substr (opos, pos - opos));
1212                 opos = pos + 1;
1213         }
1214
1215         if (opos < str.length()) {
1216                 ports.push_back (str.substr(opos));
1217         }
1218
1219         return ports.size();
1220 }
1221
1222 bool
1223 IO::set_name (const string& requested_name)
1224 {
1225         string name = requested_name;
1226
1227         if (_name == name) {
1228                 return true;
1229         }
1230
1231         /* replace all colons in the name. i wish we didn't have to do this */
1232
1233         replace_all (name, ":", "-");
1234
1235         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
1236                 string current_name = i->name();
1237                 current_name.replace (current_name.find (_name), _name.val().length(), name);
1238                 i->set_name (current_name);
1239         }
1240
1241         bool const r = SessionObject::set_name (name);
1242
1243         setup_bundle ();
1244
1245         return r;
1246 }
1247
1248 void
1249 IO::set_pretty_name (const std::string& str)
1250 {
1251         if (_pretty_name_prefix == str) {
1252                 return;
1253         }
1254         _pretty_name_prefix = str;
1255         apply_pretty_name ();
1256 }
1257
1258 void
1259 IO::apply_pretty_name ()
1260 {
1261         uint32_t pn = 1;
1262         if (_pretty_name_prefix.empty ()) {
1263                 return;
1264         }
1265         for (PortSet::iterator i = _ports.begin (); i != _ports.end(); ++i, ++pn) {
1266                 (*i)->set_pretty_name (string_compose (("%1/%2 %3"),
1267                                         _pretty_name_prefix,
1268                                         _direction == Output ? _("Out") : _("In"),
1269                                         pn));
1270         }
1271 }
1272
1273 framecnt_t
1274 IO::latency () const
1275 {
1276         framecnt_t max_latency;
1277         framecnt_t latency;
1278
1279         max_latency = 0;
1280
1281         /* io lock not taken - must be protected by other means */
1282
1283         for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
1284                 if ((latency = i->private_latency_range (_direction == Output).max) > max_latency) {
1285                         DEBUG_TRACE (DEBUG::Latency, string_compose ("port %1 has %2 latency of %3 - use\n",
1286                                                                      name(),
1287                                                                      ((_direction == Output) ? "PLAYBACK" : "CAPTURE"),
1288                                                                      latency));
1289                         max_latency = latency;
1290                 }
1291         }
1292
1293         DEBUG_TRACE (DEBUG::Latency, string_compose ("%1: max %4 latency from %2 ports = %3\n",
1294                                                      name(), _ports.num_ports(), max_latency,
1295                                                      ((_direction == Output) ? "PLAYBACK" : "CAPTURE")));
1296         return max_latency;
1297 }
1298
1299 int
1300 IO::connect_ports_to_bundle (boost::shared_ptr<Bundle> c, bool exclusive, void* src)
1301 {
1302         BLOCK_PROCESS_CALLBACK ();
1303
1304         {
1305                 Glib::Threads::Mutex::Lock lm2 (io_lock);
1306
1307                 if (exclusive) {
1308                         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
1309                                 i->disconnect_all ();
1310                         }
1311                 }
1312
1313                 c->connect (_bundle, _session.engine());
1314
1315                 /* If this is a UserBundle, make a note of what we've done */
1316
1317                 boost::shared_ptr<UserBundle> ub = boost::dynamic_pointer_cast<UserBundle> (c);
1318                 if (ub) {
1319
1320                         /* See if we already know about this one */
1321                         std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin();
1322                         while (i != _bundles_connected.end() && (*i)->bundle != ub) {
1323                                 ++i;
1324                         }
1325
1326                         if (i == _bundles_connected.end()) {
1327                                 /* We don't, so make a note */
1328                                 _bundles_connected.push_back (new UserBundleInfo (this, ub));
1329                         }
1330                 }
1331         }
1332
1333         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
1334         return 0;
1335 }
1336
1337 int
1338 IO::disconnect_ports_from_bundle (boost::shared_ptr<Bundle> c, void* src)
1339 {
1340         BLOCK_PROCESS_CALLBACK ();
1341
1342         {
1343                 Glib::Threads::Mutex::Lock lm2 (io_lock);
1344
1345                 c->disconnect (_bundle, _session.engine());
1346
1347                 /* If this is a UserBundle, make a note of what we've done */
1348
1349                 boost::shared_ptr<UserBundle> ub = boost::dynamic_pointer_cast<UserBundle> (c);
1350                 if (ub) {
1351
1352                         std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin();
1353                         while (i != _bundles_connected.end() && (*i)->bundle != ub) {
1354                                 ++i;
1355                         }
1356
1357                         if (i != _bundles_connected.end()) {
1358                                 delete *i;
1359                                 _bundles_connected.erase (i);
1360                         }
1361                 }
1362         }
1363
1364         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
1365         return 0;
1366 }
1367
1368
1369 int
1370 IO::disable_connecting ()
1371 {
1372         connecting_legal = false;
1373         return 0;
1374 }
1375
1376 int
1377 IO::enable_connecting ()
1378 {
1379         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock());
1380         connecting_legal = true;
1381         boost::optional<int> r = ConnectingLegal ();
1382         return r.get_value_or (0);
1383 }
1384
1385 void
1386 IO::bundle_changed (Bundle::Change /*c*/)
1387 {
1388         /* XXX */
1389 //      connect_input_ports_to_bundle (_input_bundle, this);
1390 }
1391
1392
1393 string
1394 IO::build_legal_port_name (DataType type)
1395 {
1396         const int name_size = AudioEngine::instance()->port_name_size();
1397         int limit;
1398         string suffix;
1399
1400         if (type == DataType::AUDIO) {
1401                 suffix = X_("audio");
1402         } else if (type == DataType::MIDI) {
1403                 suffix = X_("midi");
1404         } else {
1405                 throw unknown_type();
1406         }
1407
1408         /* note that if "in" or "out" are translated it will break a session
1409            across locale switches because a port's connection list will
1410            show (old) translated names, but the current port name will
1411            use the (new) translated name.
1412         */
1413
1414         if (_sendish) {
1415                 if (_direction == Input) {
1416                         suffix += X_("_return");
1417                 } else {
1418                         suffix += X_("_send");
1419                 }
1420         } else {
1421                 if (_direction == Input) {
1422                         suffix += X_("_in");
1423                 } else {
1424                         suffix += X_("_out");
1425                 }
1426         }
1427
1428         // allow up to 4 digits for the output port number, plus the slash, suffix and extra space
1429
1430         limit = name_size - AudioEngine::instance()->my_name().length() - (suffix.length() + 5);
1431
1432         std::vector<char> buf1(name_size+1);
1433         std::vector<char> buf2(name_size+1);
1434
1435         /* colons are illegal in port names, so fix that */
1436
1437         string nom = _name.val();
1438         replace_all (nom, ":", ";");
1439
1440         snprintf (&buf1[0], name_size+1, ("%.*s/%s"), limit, nom.c_str(), suffix.c_str());
1441
1442         int port_number = find_port_hole (&buf1[0]);
1443         snprintf (&buf2[0], name_size+1, "%s %d", &buf1[0], port_number);
1444
1445         return string (&buf2[0]);
1446 }
1447
1448 int32_t
1449 IO::find_port_hole (const char* base)
1450 {
1451         /* CALLER MUST HOLD IO LOCK */
1452
1453         uint32_t n;
1454
1455         if (_ports.empty()) {
1456                 return 1;
1457         }
1458
1459         /* we only allow up to 4 characters for the port number
1460          */
1461
1462         for (n = 1; n < 9999; ++n) {
1463                 std::vector<char> buf (AudioEngine::instance()->port_name_size());
1464                 PortSet::iterator i = _ports.begin();
1465
1466                 snprintf (&buf[0], buf.size()+1, _("%s %u"), base, n);
1467
1468                 for ( ; i != _ports.end(); ++i) {
1469                         if (string(i->name()) == string(&buf[0])) {
1470                                 break;
1471                         }
1472                 }
1473
1474                 if (i == _ports.end()) {
1475                         break;
1476                 }
1477         }
1478         return n;
1479 }
1480
1481
1482 boost::shared_ptr<AudioPort>
1483 IO::audio(uint32_t n) const
1484 {
1485         return _ports.nth_audio_port (n);
1486
1487 }
1488
1489 boost::shared_ptr<MidiPort>
1490 IO::midi(uint32_t n) const
1491 {
1492         return _ports.nth_midi_port (n);
1493 }
1494
1495 /**
1496  *  Setup a bundle that describe our inputs or outputs. Also creates the bundle if necessary.
1497  */
1498
1499 void
1500 IO::setup_bundle ()
1501 {
1502         char buf[32];
1503
1504         if (!_bundle) {
1505                 _bundle.reset (new Bundle (_direction == Input));
1506         }
1507
1508         _bundle->suspend_signals ();
1509
1510         _bundle->remove_channels ();
1511
1512         if (_direction == Input) {
1513                 snprintf(buf, sizeof (buf), _("%s in"), _name.val().c_str());
1514         } else {
1515                 snprintf(buf, sizeof (buf), _("%s out"), _name.val().c_str());
1516         }
1517         _bundle->set_name (buf);
1518
1519         int c = 0;
1520         for (DataType::iterator i = DataType::begin(); i != DataType::end(); ++i) {
1521
1522                 uint32_t const N = _ports.count().get (*i);
1523                 for (uint32_t j = 0; j < N; ++j) {
1524                         _bundle->add_channel (bundle_channel_name (j, N, *i), *i);
1525                         _bundle->set_port (c, _session.engine().make_port_name_non_relative (_ports.port(*i, j)->name()));
1526                         ++c;
1527                 }
1528
1529         }
1530
1531         _bundle->resume_signals ();
1532 }
1533
1534 /** @return Bundles connected to our ports */
1535 BundleList
1536 IO::bundles_connected ()
1537 {
1538         BundleList bundles;
1539
1540         /* User bundles */
1541         for (std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin(); i != _bundles_connected.end(); ++i) {
1542                 bundles.push_back ((*i)->bundle);
1543         }
1544
1545         /* Session bundles */
1546         boost::shared_ptr<ARDOUR::BundleList> b = _session.bundles ();
1547         for (ARDOUR::BundleList::iterator i = b->begin(); i != b->end(); ++i) {
1548                 if ((*i)->connected_to (_bundle, _session.engine())) {
1549                         bundles.push_back (*i);
1550                 }
1551         }
1552
1553         /* Route bundles */
1554
1555         boost::shared_ptr<ARDOUR::RouteList> r = _session.get_routes ();
1556
1557         if (_direction == Input) {
1558                 for (ARDOUR::RouteList::iterator i = r->begin(); i != r->end(); ++i) {
1559                         if ((*i)->output()->bundle()->connected_to (_bundle, _session.engine())) {
1560                                 bundles.push_back ((*i)->output()->bundle());
1561                         }
1562                 }
1563         } else {
1564                 for (ARDOUR::RouteList::iterator i = r->begin(); i != r->end(); ++i) {
1565                         if ((*i)->input()->bundle()->connected_to (_bundle, _session.engine())) {
1566                                 bundles.push_back ((*i)->input()->bundle());
1567                         }
1568                 }
1569         }
1570
1571         return bundles;
1572 }
1573
1574
1575 IO::UserBundleInfo::UserBundleInfo (IO* io, boost::shared_ptr<UserBundle> b)
1576 {
1577         bundle = b;
1578         b->Changed.connect_same_thread (changed, boost::bind (&IO::bundle_changed, io, _1));
1579 }
1580
1581 std::string
1582 IO::bundle_channel_name (uint32_t c, uint32_t n, DataType t) const
1583 {
1584         char buf[32];
1585
1586         if (t == DataType::AUDIO) {
1587
1588                 switch (n) {
1589                 case 1:
1590                         return _("mono");
1591                 case 2:
1592                         return c == 0 ? _("L") : _("R");
1593                 default:
1594                         snprintf (buf, sizeof(buf), "%d", (c + 1));
1595                         return buf;
1596                 }
1597
1598         } else {
1599
1600                 snprintf (buf, sizeof(buf), "%d", (c + 1));
1601                 return buf;
1602
1603         }
1604
1605         return "";
1606 }
1607
1608 string
1609 IO::name_from_state (const XMLNode& node)
1610 {
1611         XMLProperty const * prop;
1612
1613         if ((prop = node.property ("name")) != 0) {
1614                 return prop->value();
1615         }
1616
1617         return string();
1618 }
1619
1620 void
1621 IO::set_name_in_state (XMLNode& node, const string& new_name)
1622 {
1623         node.set_property (X_("name"), new_name);
1624         XMLNodeList children = node.children ();
1625         for (XMLNodeIterator i = children.begin(); i != children.end(); ++i) {
1626                 if ((*i)->name() == X_("Port")) {
1627                         string const old_name = (*i)->property(X_("name"))->value();
1628                         string const old_name_second_part = old_name.substr (old_name.find_first_of ("/") + 1);
1629                         (*i)->set_property (X_("name"), string_compose ("%1/%2", new_name, old_name_second_part));
1630                 }
1631         }
1632 }
1633
1634 bool
1635 IO::connected () const
1636 {
1637         /* do we have any connections at all? */
1638
1639         for (PortSet::const_iterator p = _ports.begin(); p != _ports.end(); ++p) {
1640                 if (p->connected()) {
1641                         return true;
1642                 }
1643         }
1644
1645         return false;
1646 }
1647
1648 bool
1649 IO::connected_to (boost::shared_ptr<const IO> other) const
1650 {
1651         if (!other) {
1652                 return connected ();
1653         }
1654
1655         assert (_direction != other->direction());
1656
1657         uint32_t i, j;
1658         uint32_t no = n_ports().n_total();
1659         uint32_t ni = other->n_ports ().n_total();
1660
1661         for (i = 0; i < no; ++i) {
1662                 for (j = 0; j < ni; ++j) {
1663                         if ((NULL != nth(i).get()) && (NULL != other->nth(j).get())) {
1664                                 if (nth(i)->connected_to (other->nth(j)->name())) {
1665                                         return true;
1666                                 }
1667                         }
1668                 }
1669         }
1670
1671         return false;
1672 }
1673
1674 bool
1675 IO::connected_to (const string& str) const
1676 {
1677         for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
1678                 if (i->connected_to (str)) {
1679                         return true;
1680                 }
1681         }
1682
1683         return false;
1684 }
1685
1686 /** Call a processor's ::run() method, giving it our buffers
1687  *  Caller must hold process lock.
1688  */
1689 void
1690 IO::process_input (boost::shared_ptr<Processor> proc, framepos_t start_frame, framepos_t end_frame, double speed, pframes_t nframes)
1691 {
1692         /* don't read the data into new buffers - just use the port buffers directly */
1693
1694         if (n_ports().n_total() == 0) {
1695                 /* We have no ports, so nothing to process */
1696                 return;
1697         }
1698
1699         _buffers.get_backend_port_addresses (_ports, nframes);
1700         if (proc) {
1701                 proc->run (_buffers, start_frame, end_frame, speed, nframes, true);
1702         }
1703 }
1704
1705 void
1706 IO::collect_input (BufferSet& bufs, pframes_t nframes, ChanCount offset)
1707 {
1708         assert(bufs.available() >= _ports.count());
1709
1710         if (_ports.count() == ChanCount::ZERO) {
1711                 return;
1712         }
1713
1714         bufs.set_count (_ports.count());
1715
1716         for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
1717                 PortSet::iterator   i = _ports.begin(*t);
1718                 BufferSet::iterator b = bufs.begin(*t);
1719
1720                 for (uint32_t off = 0; off < offset.get(*t); ++off, ++b) {
1721                         if (b == bufs.end(*t)) {
1722                                 continue;
1723                         }
1724                 }
1725
1726                 for ( ; i != _ports.end(*t); ++i, ++b) {
1727                         const Buffer& bb (i->get_buffer (nframes));
1728                         b->read_from (bb, nframes);
1729                 }
1730         }
1731 }
1732
1733 void
1734 IO::copy_to_outputs (BufferSet& bufs, DataType type, pframes_t nframes, framecnt_t offset)
1735 {
1736         PortSet::iterator o = _ports.begin(type);
1737         BufferSet::iterator i = bufs.begin(type);
1738         BufferSet::iterator prev = i;
1739
1740         assert(i != bufs.end(type)); // or second loop will crash
1741
1742         // Copy any buffers 1:1 to outputs
1743
1744         while (i != bufs.end(type) && o != _ports.end (type)) {
1745                 Buffer& port_buffer (o->get_buffer (nframes));
1746                 port_buffer.read_from (*i, nframes, offset);
1747                 prev = i;
1748                 ++i;
1749                 ++o;
1750         }
1751
1752         // Copy last buffer to any extra outputs
1753
1754         while (o != _ports.end(type)) {
1755                 Buffer& port_buffer (o->get_buffer (nframes));
1756                 port_buffer.read_from (*prev, nframes, offset);
1757                 ++o;
1758         }
1759 }
1760
1761 boost::shared_ptr<Port>
1762 IO::port_by_name (const std::string& str) const
1763 {
1764         /* to be called only from ::set_state() - no locking */
1765
1766         for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
1767
1768                 if (i->name() == str) {
1769                         return boost::const_pointer_cast<Port> (*i);
1770                 }
1771         }
1772
1773         return boost::shared_ptr<Port> ();
1774 }
1775
1776 bool
1777 IO::physically_connected () const
1778 {
1779         for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
1780                 if (i->physically_connected()) {
1781                         return true;
1782                 }
1783         }
1784
1785         return false;
1786 }
1787
1788 bool
1789 IO::has_port (boost::shared_ptr<Port> p) const
1790 {
1791         Glib::Threads::Mutex::Lock lm (io_lock);
1792         return _ports.contains (p);
1793 }