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 <fstream>
  20 #include <algorithm>
  21 #include <cmath>
  22 #include <vector>
  23
  24 #include <unistd.h>
  25 #include <locale.h>
  26 #include <errno.h>
  27
  28 #include <glibmm.h>
  29 #include <glibmm/threads.h>
  30
  31 #include "pbd/xml++.h"
  32 #include "pbd/replace_all.h"
  33 #include "pbd/unknown_type.h"
  34 #include "pbd/enumwriter.h"
  35
  36 #include "ardour/audioengine.h"
  37 #include "ardour/buffer.h"
  38 #include "ardour/buffer_set.h"
  39 #include "ardour/debug.h"
  40 #include "ardour/io.h"
  41 #include "ardour/port.h"
  42 #include "ardour/route.h"
  43 #include "ardour/session.h"
  44 #include "ardour/user_bundle.h"
  45
  46 #include "i18n.h"
  47
  48 #define BLOCK_PROCESS_CALLBACK() Glib::Threads::Mutex::Lock em (AudioEngine::instance()->process_lock())
  49
  50 using namespace std;
  51 using namespace ARDOUR;
  52 using namespace PBD;
  53
  54 const string                 IO::state_node_name = "IO";
  55 bool                         IO::connecting_legal = false;
  56 PBD::Signal0<int>            IO::ConnectingLegal;
  57 PBD::Signal1<void,ChanCount> IO::PortCountChanged;
  58
  59 /** @param default_type The type of port that will be created by ensure_io
  60  * and friends if no type is explicitly requested (to avoid breakage).
  61  */
  62 IO::IO (Session& s, const string& name, Direction dir, DataType default_type, bool sendish)
  63         : SessionObject (s, name)
  64         , _direction (dir)
  65         , _default_type (default_type)
  66         , _sendish (sendish)
  67 {
  68         _active = true;
  69         Port::PostDisconnect.connect_same_thread (*this, boost::bind (&IO::disconnect_check, this, _1, _2));
  70         pending_state_node = 0;
  71         setup_bundle ();
  72 }
  73
  74 IO::IO (Session& s, const XMLNode& node, DataType dt, bool sendish)
  75         : SessionObject(s, "unnamed io")
  76         , _direction (Input)
  77         , _default_type (dt)
  78         , _sendish (sendish)
  79 {
  80         _active = true;
  81         pending_state_node = 0;
  82         Port::PostDisconnect.connect_same_thread (*this, boost::bind (&IO::disconnect_check, this, _1, _2));
  83
  84         set_state (node, Stateful::loading_state_version);
  85         setup_bundle ();
  86 }
  87
  88 IO::~IO ()
  89 {
  90         Glib::Threads::Mutex::Lock lm (io_lock);
  91
  92         BLOCK_PROCESS_CALLBACK ();
  93
  94         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
  95                 _session.engine().unregister_port (*i);
  96         }
  97 }
  98
  99 void
 100 IO::disconnect_check (boost::shared_ptr<Port> a, boost::shared_ptr<Port> b)
 101 {
 102         /* this could be called from within our own ::disconnect() method(s)
 103            or from somewhere that operates directly on a port. so, we don't
 104            know for sure if we can take this lock or not. if we fail,
 105            we assume that its safely locked by our own ::disconnect().
 106         */
 107
 108         Glib::Threads::Mutex::Lock tm (io_lock, Glib::Threads::TRY_LOCK);
 109
 110         if (tm.locked()) {
 111                 /* we took the lock, so we cannot be here from inside
 112                  * ::disconnect()
 113                  */
 114                 if (_ports.contains (a) || _ports.contains (b)) {
 115                         changed (IOChange (IOChange::ConnectionsChanged), this); /* EMIT SIGNAL */
 116                 }
 117         } else {
 118                 /* we didn't get the lock, so assume that we're inside
 119                  * ::disconnect(), and it will call changed() appropriately.
 120                  */
 121         }
 122 }
 123
 124 void
 125 IO::increment_port_buffer_offset (pframes_t offset)
 126 {
 127         /* io_lock, not taken: function must be called from Session::process() calltree */
 128
 129         if (_direction == Output) {
 130                 for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 131                         i->increment_port_buffer_offset (offset);
 132                 }
 133         }
 134 }
 135
 136 void
 137 IO::silence (framecnt_t nframes)
 138 {
 139         /* io_lock, not taken: function must be called from Session::process() calltree */
 140
 141         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 142                 i->get_buffer(nframes).silence (nframes);
 143         }
 144 }
 145
 146 /** Set _bundles_connected to those bundles that are connected such that every
 147  *  port on every bundle channel x is connected to port x in _ports.
 148  */
 149 void
 150 IO::check_bundles_connected ()
 151 {
 152         std::vector<UserBundleInfo*> new_list;
 153
 154         for (std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin(); i != _bundles_connected.end(); ++i) {
 155
 156                 uint32_t const N = (*i)->bundle->nchannels().n_total();
 157
 158                 if (_ports.num_ports() < N) {
 159                         continue;
 160                 }
 161
 162                 bool ok = true;
 163
 164                 for (uint32_t j = 0; j < N; ++j) {
 165                         /* Every port on bundle channel j must be connected to our input j */
 166                         Bundle::PortList const pl = (*i)->bundle->channel_ports (j);
 167                         for (uint32_t k = 0; k < pl.size(); ++k) {
 168                                 if (_ports.port(j)->connected_to (pl[k]) == false) {
 169                                         ok = false;
 170                                         break;
 171                                 }
 172                         }
 173
 174                         if (ok == false) {
 175                                 break;
 176                         }
 177                 }
 178
 179                 if (ok) {
 180                         new_list.push_back (*i);
 181                 } else {
 182                         delete *i;
 183                 }
 184         }
 185
 186         _bundles_connected = new_list;
 187 }
 188
 189
 190 int
 191 IO::disconnect (boost::shared_ptr<Port> our_port, string other_port, void* src)
 192 {
 193         if (other_port.length() == 0 || our_port == 0) {
 194                 return 0;
 195         }
 196
 197         {
 198                 Glib::Threads::Mutex::Lock lm (io_lock);
 199
 200                 /* check that our_port is really one of ours */
 201
 202                 if ( ! _ports.contains(our_port)) {
 203                         return -1;
 204                 }
 205
 206                 /* disconnect it from the source */
 207
 208                 if (our_port->disconnect (other_port)) {
 209                         error << string_compose(_("IO: cannot disconnect port %1 from %2"), our_port->name(), other_port) << endmsg;
 210                         return -1;
 211                 }
 212
 213                 check_bundles_connected ();
 214         }
 215
 216         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
 217
 218         _session.set_dirty ();
 219
 220         return 0;
 221 }
 222
 223 int
 224 IO::connect (boost::shared_ptr<Port> our_port, string other_port, void* src)
 225 {
 226         if (other_port.length() == 0 || our_port == 0) {
 227                 return 0;
 228         }
 229
 230         {
 231                 Glib::Threads::Mutex::Lock lm (io_lock);
 232
 233                 /* check that our_port is really one of ours */
 234
 235                 if ( ! _ports.contains(our_port) ) {
 236                         return -1;
 237                 }
 238
 239                 /* connect it to the source */
 240
 241                 if (our_port->connect (other_port)) {
 242                         return -1;
 243                 }
 244         }
 245         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
 246         _session.set_dirty ();
 247         return 0;
 248 }
 249
 250 int
 251 IO::remove_port (boost::shared_ptr<Port> port, void* src)
 252 {
 253         ChanCount before = _ports.count ();
 254         ChanCount after = before;
 255         after.set (port->type(), after.get (port->type()) - 1);
 256
 257         boost::optional<bool> const r = PortCountChanging (after); /* EMIT SIGNAL */
 258         if (r.get_value_or (false)) {
 259                 return -1;
 260         }
 261
 262         IOChange change;
 263
 264         {
 265                 BLOCK_PROCESS_CALLBACK ();
 266
 267                 {
 268                         Glib::Threads::Mutex::Lock lm (io_lock);
 269
 270                         if (_ports.remove(port)) {
 271                                 change.type = IOChange::Type (change.type | IOChange::ConfigurationChanged);
 272                                 change.before = before;
 273                                 change.after = _ports.count ();
 274
 275                                 if (port->connected()) {
 276                                         change.type = IOChange::Type (change.type | IOChange::ConnectionsChanged);
 277                                 }
 278
 279                                 _session.engine().unregister_port (port);
 280                                 check_bundles_connected ();
 281                         }
 282                 }
 283
 284                 PortCountChanged (n_ports()); /* EMIT SIGNAL */
 285
 286                 if (change.type != IOChange::NoChange) {
 287                         changed (change, src);
 288                         _buffers.attach_buffers (_ports);
 289                 }
 290         }
 291
 292         if (change.type & IOChange::ConfigurationChanged) {
 293                 setup_bundle ();
 294         }
 295
 296         if (change.type == IOChange::NoChange) {
 297                 return -1;
 298         }
 299
 300         _session.set_dirty ();
 301
 302         return 0;
 303 }
 304
 305 /** Add a port.
 306  *
 307  * @param destination Name of port to connect new port to.
 308  * @param src Source for emitted ConfigurationChanged signal.
 309  * @param type Data type of port.  Default value (NIL) will use this IO's default type.
 310  */
 311 int
 312 IO::add_port (string destination, void* src, DataType type)
 313 {
 314         boost::shared_ptr<Port> our_port;
 315
 316         if (type == DataType::NIL) {
 317                 type = _default_type;
 318         }
 319
 320         ChanCount before = _ports.count ();
 321         ChanCount after = before;
 322         after.set (type, after.get (type) + 1);
 323
 324         bool const r = PortCountChanging (after); /* EMIT SIGNAL */
 325         if (r) {
 326                 return -1;
 327         }
 328
 329         IOChange change;
 330
 331         {
 332                 BLOCK_PROCESS_CALLBACK ();
 333
 334
 335                 {
 336                         Glib::Threads::Mutex::Lock lm (io_lock);
 337
 338                         /* Create a new port */
 339
 340                         string portname = build_legal_port_name (type);
 341
 342                         if (_direction == Input) {
 343                                 if ((our_port = _session.engine().register_input_port (type, portname)) == 0) {
 344                                         error << string_compose(_("IO: cannot register input port %1"), portname) << endmsg;
 345                                         return -1;
 346                                 }
 347                         } else {
 348                                 if ((our_port = _session.engine().register_output_port (type, portname)) == 0) {
 349                                         error << string_compose(_("IO: cannot register output port %1"), portname) << endmsg;
 350                                         return -1;
 351                                 }
 352                         }
 353
 354                         change.before = _ports.count ();
 355                         _ports.add (our_port);
 356                 }
 357
 358                 PortCountChanged (n_ports()); /* EMIT SIGNAL */
 359                 change.type = IOChange::ConfigurationChanged;
 360                 change.after = _ports.count ();
 361                 changed (change, src); /* EMIT SIGNAL */
 362                 _buffers.attach_buffers (_ports);
 363         }
 364
 365         if (!destination.empty()) {
 366                 if (our_port->connect (destination)) {
 367                         return -1;
 368                 }
 369         }
 370
 371         setup_bundle ();
 372         _session.set_dirty ();
 373
 374         return 0;
 375 }
 376
 377 int
 378 IO::disconnect (void* src)
 379 {
 380         {
 381                 Glib::Threads::Mutex::Lock lm (io_lock);
 382
 383                 for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 384                         i->disconnect_all ();
 385                 }
 386
 387                 check_bundles_connected ();
 388         }
 389
 390         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
 391
 392         return 0;
 393 }
 394
 395 /** Caller must hold process lock */
 396 int
 397 IO::ensure_ports_locked (ChanCount count, bool clear, bool& changed)
 398 {
 399 #ifndef PLATFORM_WINDOWS
 400         assert (!AudioEngine::instance()->process_lock().trylock());
 401 #endif
 402
 403         boost::shared_ptr<Port> port;
 404
 405         changed    = false;
 406
 407         for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
 408
 409                 const size_t n = count.get(*t);
 410
 411                 /* remove unused ports */
 412                 for (size_t i = n_ports().get(*t); i > n; --i) {
 413                         port = _ports.port(*t, i-1);
 414
 415                         assert(port);
 416                         _ports.remove(port);
 417                         _session.engine().unregister_port (port);
 418
 419                         changed = true;
 420                 }
 421
 422                 /* create any necessary new ports */
 423                 while (n_ports().get(*t) < n) {
 424
 425                         string portname = build_legal_port_name (*t);
 426
 427                         try {
 428
 429                                 if (_direction == Input) {
 430                                         if ((port = _session.engine().register_input_port (*t, portname)) == 0) {
 431                                                 error << string_compose(_("IO: cannot register input port %1"), portname) << endmsg;
 432                                                 return -1;
 433                                         }
 434                                 } else {
 435                                         if ((port = _session.engine().register_output_port (*t, portname)) == 0) {
 436                                                 error << string_compose(_("IO: cannot register output port %1"), portname) << endmsg;
 437                                                 return -1;
 438                                         }
 439                                 }
 440                         }
 441
 442                         catch (AudioEngine::PortRegistrationFailure& err) {
 443                                 /* pass it on */
 444                                 throw;
 445                         }
 446
 447                         _ports.add (port);
 448                         changed = true;
 449                 }
 450         }
 451
 452         if (changed) {
 453                 check_bundles_connected ();
 454                 PortCountChanged (n_ports()); /* EMIT SIGNAL */
 455                 _session.set_dirty ();
 456         }
 457
 458         if (clear) {
 459                 /* disconnect all existing ports so that we get a fresh start */
 460                 for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 461                         i->disconnect_all ();
 462                 }
 463         }
 464
 465         return 0;
 466 }
 467
 468 /** Caller must hold process lock */
 469 int
 470 IO::ensure_ports (ChanCount count, bool clear, void* src)
 471 {
 472 #ifndef PLATFORM_WINDOWS
 473         assert (!AudioEngine::instance()->process_lock().trylock());
 474 #endif
 475
 476         bool changed = false;
 477
 478         if (count == n_ports() && !clear) {
 479                 return 0;
 480         }
 481
 482         IOChange change;
 483
 484         change.before = _ports.count ();
 485
 486         {
 487                 Glib::Threads::Mutex::Lock im (io_lock);
 488                 if (ensure_ports_locked (count, clear, changed)) {
 489                         return -1;
 490                 }
 491         }
 492
 493         if (changed) {
 494                 change.after = _ports.count ();
 495                 change.type = IOChange::ConfigurationChanged;
 496                 this->changed (change, src); /* EMIT SIGNAL */
 497                 _buffers.attach_buffers (_ports);
 498                 setup_bundle ();
 499                 _session.set_dirty ();
 500         }
 501
 502         return 0;
 503 }
 504
 505 /** Caller must hold process lock */
 506 int
 507 IO::ensure_io (ChanCount count, bool clear, void* src)
 508 {
 509 #ifndef PLATFORM_WINDOWS
 510         assert (!AudioEngine::instance()->process_lock().trylock());
 511 #endif
 512
 513         return ensure_ports (count, clear, src);
 514 }
 515
 516 XMLNode&
 517 IO::get_state ()
 518 {
 519         return state (true);
 520 }
 521
 522 XMLNode&
 523 IO::state (bool /*full_state*/)
 524 {
 525         XMLNode* node = new XMLNode (state_node_name);
 526         char buf[64];
 527         string str;
 528         vector<string>::iterator ci;
 529         int n;
 530         LocaleGuard lg (X_("POSIX"));
 531         Glib::Threads::Mutex::Lock lm (io_lock);
 532
 533         node->add_property("name", _name);
 534         id().print (buf, sizeof (buf));
 535         node->add_property("id", buf);
 536         node->add_property ("direction", enum_2_string (_direction));
 537         node->add_property ("default-type", _default_type.to_string());
 538
 539         for (std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin(); i != _bundles_connected.end(); ++i) {
 540                 XMLNode* n = new XMLNode ("Bundle");
 541                 n->add_property ("name", (*i)->bundle->name ());
 542                 node->add_child_nocopy (*n);
 543         }
 544
 545         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 546
 547                 vector<string> connections;
 548
 549                 XMLNode* pnode = new XMLNode (X_("Port"));
 550                 pnode->add_property (X_("type"), i->type().to_string());
 551                 pnode->add_property (X_("name"), i->name());
 552
 553                 if (i->get_connections (connections)) {
 554
 555                         for (n = 0, ci = connections.begin(); ci != connections.end(); ++ci, ++n) {
 556
 557                                 /* if its a connection to our own port,
 558                                    return only the port name, not the
 559                                    whole thing. this allows connections
 560                                    to be re-established even when our
 561                                    client name is different.
 562                                 */
 563
 564                                 XMLNode* cnode = new XMLNode (X_("Connection"));
 565
 566                                 cnode->add_property (X_("other"), _session.engine().make_port_name_relative (*ci));
 567                                 pnode->add_child_nocopy (*cnode);
 568                         }
 569                 }
 570
 571                 node->add_child_nocopy (*pnode);
 572         }
 573
 574         snprintf (buf, sizeof (buf), "%" PRId64, _user_latency);
 575         node->add_property (X_("user-latency"), buf);
 576
 577         return *node;
 578 }
 579
 580 int
 581 IO::set_state (const XMLNode& node, int version)
 582 {
 583         /* callers for version < 3000 need to call set_state_2X directly, as A3 IOs
 584          * are input OR output, not both, so the direction needs to be specified
 585          * by the caller.
 586          */
 587         assert (version >= 3000);
 588
 589         const XMLProperty* prop;
 590         XMLNodeConstIterator iter;
 591         LocaleGuard lg (X_("POSIX"));
 592
 593         /* force use of non-localized representation of decimal point,
 594            since we use it a lot in XML files and so forth.
 595         */
 596
 597         if (node.name() != state_node_name) {
 598                 error << string_compose(_("incorrect XML node \"%1\" passed to IO object"), node.name()) << endmsg;
 599                 return -1;
 600         }
 601
 602         if ((prop = node.property ("name")) != 0) {
 603                 set_name (prop->value());
 604         }
 605
 606         if ((prop = node.property (X_("default-type"))) != 0) {
 607                 _default_type = DataType(prop->value());
 608                 assert(_default_type != DataType::NIL);
 609         }
 610
 611         set_id (node);
 612
 613         if ((prop = node.property ("direction")) != 0) {
 614                 _direction = (Direction) string_2_enum (prop->value(), _direction);
 615         }
 616
 617         if (create_ports (node, version)) {
 618                 return -1;
 619         }
 620
 621         if (connecting_legal) {
 622
 623                 if (make_connections (node, version, false)) {
 624                         return -1;
 625                 }
 626
 627         } else {
 628
 629                 pending_state_node = new XMLNode (node);
 630                 pending_state_node_version = version;
 631                 pending_state_node_in = false;
 632                 ConnectingLegal.connect_same_thread (connection_legal_c, boost::bind (&IO::connecting_became_legal, this));
 633         }
 634
 635         if ((prop = node.property ("user-latency")) != 0) {
 636                 _user_latency = atoi (prop->value ());
 637         }
 638
 639         return 0;
 640 }
 641
 642 int
 643 IO::set_state_2X (const XMLNode& node, int version, bool in)
 644 {
 645         const XMLProperty* prop;
 646         XMLNodeConstIterator iter;
 647         LocaleGuard lg (X_("POSIX"));
 648
 649         /* force use of non-localized representation of decimal point,
 650            since we use it a lot in XML files and so forth.
 651         */
 652
 653         if (node.name() != state_node_name) {
 654                 error << string_compose(_("incorrect XML node \"%1\" passed to IO object"), node.name()) << endmsg;
 655                 return -1;
 656         }
 657
 658         if ((prop = node.property ("name")) != 0) {
 659                 set_name (prop->value());
 660         }
 661
 662         if ((prop = node.property (X_("default-type"))) != 0) {
 663                 _default_type = DataType(prop->value());
 664                 assert(_default_type != DataType::NIL);
 665         }
 666
 667         set_id (node);
 668
 669         _direction = in ? Input : Output;
 670
 671         if (create_ports (node, version)) {
 672                 return -1;
 673         }
 674
 675         if (connecting_legal) {
 676
 677                 if (make_connections_2X (node, version, in)) {
 678                         return -1;
 679                 }
 680
 681         } else {
 682
 683                 pending_state_node = new XMLNode (node);
 684                 pending_state_node_version = version;
 685                 pending_state_node_in = in;
 686                 ConnectingLegal.connect_same_thread (connection_legal_c, boost::bind (&IO::connecting_became_legal, this));
 687         }
 688
 689         return 0;
 690 }
 691
 692 int
 693 IO::connecting_became_legal ()
 694 {
 695         int ret;
 696
 697         assert (pending_state_node);
 698
 699         connection_legal_c.disconnect ();
 700
 701         ret = make_connections (*pending_state_node, pending_state_node_version, pending_state_node_in);
 702
 703         delete pending_state_node;
 704         pending_state_node = 0;
 705
 706         return ret;
 707 }
 708
 709 boost::shared_ptr<Bundle>
 710 IO::find_possible_bundle (const string &desired_name)
 711 {
 712         static const string digits = "0123456789";
 713         const string &default_name = (_direction == Input ? _("in") : _("out"));
 714         const string &bundle_type_name = (_direction == Input ? _("input") : _("output"));
 715
 716         boost::shared_ptr<Bundle> c = _session.bundle_by_name (desired_name);
 717
 718         if (!c) {
 719                 int bundle_number, mask;
 720                 string possible_name;
 721                 bool stereo = false;
 722                 string::size_type last_non_digit_pos;
 723
 724                 error << string_compose(_("Unknown bundle \"%1\" listed for %2 of %3"), desired_name, bundle_type_name, _name)
 725                       << endmsg;
 726
 727                 // find numeric suffix of desired name
 728                 bundle_number = 0;
 729
 730                 last_non_digit_pos = desired_name.find_last_not_of(digits);
 731
 732                 if (last_non_digit_pos != string::npos) {
 733                         stringstream s;
 734                         s << desired_name.substr(last_non_digit_pos);
 735                         s >> bundle_number;
 736                 }
 737
 738                 // see if it's a stereo connection e.g. "in 3+4"
 739
 740                 if (last_non_digit_pos > 1 && desired_name[last_non_digit_pos] == '+') {
 741                         string::size_type left_last_non_digit_pos;
 742
 743                         left_last_non_digit_pos = desired_name.find_last_not_of(digits, last_non_digit_pos-1);
 744
 745                         if (left_last_non_digit_pos != string::npos) {
 746                                 int left_bundle_number = 0;
 747                                 stringstream s;
 748                                 s << desired_name.substr(left_last_non_digit_pos, last_non_digit_pos-1);
 749                                 s >> left_bundle_number;
 750
 751                                 if (left_bundle_number > 0 && left_bundle_number + 1 == bundle_number) {
 752                                         bundle_number--;
 753                                         stereo = true;
 754                                 }
 755                         }
 756                 }
 757
 758                 // make 0-based
 759                 if (bundle_number)
 760                         bundle_number--;
 761
 762                 // find highest set bit
 763                 mask = 1;
 764                 while ((mask <= bundle_number) && (mask <<= 1)) {}
 765
 766                 // "wrap" bundle number into largest possible power of 2
 767                 // that works...
 768
 769                 while (mask) {
 770
 771                         if (bundle_number & mask) {
 772                                 bundle_number &= ~mask;
 773
 774                                 stringstream s;
 775                                 s << default_name << " " << bundle_number + 1;
 776
 777                                 if (stereo) {
 778                                         s << "+" << bundle_number + 2;
 779                                 }
 780
 781                                 possible_name = s.str();
 782
 783                                 if ((c = _session.bundle_by_name (possible_name)) != 0) {
 784                                         break;
 785                                 }
 786                         }
 787                         mask >>= 1;
 788                 }
 789                 if (c) {
 790                         info << string_compose (_("Bundle %1 was not available - \"%2\" used instead"), desired_name, possible_name)
 791                              << endmsg;
 792                 } else {
 793                         error << string_compose(_("No %1 bundles available as a replacement"), bundle_type_name)
 794                               << endmsg;
 795                 }
 796
 797         }
 798
 799         return c;
 800
 801 }
 802
 803 int
 804 IO::get_port_counts_2X (XMLNode const & node, int /*version*/, ChanCount& n, boost::shared_ptr<Bundle>& /*c*/)
 805 {
 806         XMLProperty const * prop;
 807         XMLNodeList children = node.children ();
 808
 809         uint32_t n_audio = 0;
 810
 811         for (XMLNodeIterator i = children.begin(); i != children.end(); ++i) {
 812
 813                 if ((prop = node.property ("inputs")) != 0 && _direction == Input) {
 814                         n_audio = count (prop->value().begin(), prop->value().end(), '{');
 815                 } else if ((prop = node.property ("input-connection")) != 0 && _direction == Input) {
 816                         n_audio = 1;
 817                 } else if ((prop = node.property ("outputs")) != 0 && _direction == Output) {
 818                         n_audio = count (prop->value().begin(), prop->value().end(), '{');
 819                 } else if ((prop = node.property ("output-connection")) != 0 && _direction == Output) {
 820                         n_audio = 2;
 821                 }
 822         }
 823
 824         ChanCount cnt;
 825         cnt.set_audio (n_audio);
 826         n = ChanCount::max (n, cnt);
 827
 828         return 0;
 829 }
 830
 831 int
 832 IO::get_port_counts (const XMLNode& node, int version, ChanCount& n, boost::shared_ptr<Bundle>& c)
 833 {
 834         if (version < 3000) {
 835                 return get_port_counts_2X (node, version, n, c);
 836         }
 837
 838         XMLProperty const * prop;
 839         XMLNodeConstIterator iter;
 840         uint32_t n_audio = 0;
 841         uint32_t n_midi = 0;
 842         ChanCount cnt;
 843
 844         n = n_ports();
 845
 846         if ((prop = node.property ("connection")) != 0) {
 847
 848                 if ((c = find_possible_bundle (prop->value())) != 0) {
 849                         n = ChanCount::max (n, c->nchannels());
 850                 }
 851                 return 0;
 852         }
 853
 854         for (iter = node.children().begin(); iter != node.children().end(); ++iter) {
 855
 856                 if ((*iter)->name() == X_("Bundle")) {
 857                         prop = (*iter)->property ("name");
 858                         if ((c = find_possible_bundle (prop->value())) != 0) {
 859                                 n = ChanCount::max (n, c->nchannels());
 860                                 return 0;
 861                         } else {
 862                                 return -1;
 863                         }
 864                 }
 865
 866                 if ((*iter)->name() == X_("Port")) {
 867                         prop = (*iter)->property (X_("type"));
 868
 869                         if (!prop) {
 870                                 continue;
 871                         }
 872
 873                         if (prop->value() == X_("audio")) {
 874                                 cnt.set_audio (++n_audio);
 875                         } else if (prop->value() == X_("midi")) {
 876                                 cnt.set_midi (++n_midi);
 877                         }
 878                 }
 879         }
 880
 881         n = ChanCount::max (n, cnt);
 882         return 0;
 883 }
 884
 885 int
 886 IO::create_ports (const XMLNode& node, int version)
 887 {
 888         ChanCount n;
 889         boost::shared_ptr<Bundle> c;
 890
 891         get_port_counts (node, version, n, c);
 892
 893         {
 894                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 895
 896                 if (ensure_ports (n, true, this)) {
 897                         error << string_compose(_("%1: cannot create I/O ports"), _name) << endmsg;
 898                         return -1;
 899                 }
 900         }
 901
 902         /* XXX use c */
 903
 904         return 0;
 905 }
 906
 907 int
 908 IO::make_connections (const XMLNode& node, int version, bool in)
 909 {
 910         if (version < 3000) {
 911                 return make_connections_2X (node, version, in);
 912         }
 913
 914         const XMLProperty* prop;
 915
 916         for (XMLNodeConstIterator i = node.children().begin(); i != node.children().end(); ++i) {
 917
 918                 if ((*i)->name() == "Bundle") {
 919                         XMLProperty const * prop = (*i)->property ("name");
 920                         if (prop) {
 921                                 boost::shared_ptr<Bundle> b = find_possible_bundle (prop->value());
 922                                 if (b) {
 923                                         connect_ports_to_bundle (b, true, this);
 924                                 }
 925                         }
 926
 927                         return 0;
 928                 }
 929
 930                 if ((*i)->name() == "Port") {
 931
 932                         prop = (*i)->property (X_("name"));
 933
 934                         if (!prop) {
 935                                 continue;
 936                         }
 937
 938                         boost::shared_ptr<Port> p = port_by_name (prop->value());
 939
 940                         if (p) {
 941                                 for (XMLNodeConstIterator c = (*i)->children().begin(); c != (*i)->children().end(); ++c) {
 942
 943                                         XMLNode* cnode = (*c);
 944
 945                                         if (cnode->name() != X_("Connection")) {
 946                                                 continue;
 947                                         }
 948
 949                                         if ((prop = cnode->property (X_("other"))) == 0) {
 950                                                 continue;
 951                                         }
 952
 953                                         if (prop) {
 954                                                 connect (p, prop->value(), this);
 955                                         }
 956                                 }
 957                         }
 958                 }
 959         }
 960
 961         return 0;
 962 }
 963
 964 void
 965 IO::prepare_for_reset (XMLNode& node, const std::string& name)
 966 {
 967         /* reset name */
 968         node.add_property ("name", name);
 969
 970         /* now find connections and reset the name of the port
 971            in one so that when we re-use it it will match
 972            the name of the thing we're applying it to.
 973         */
 974
 975         XMLProperty* prop;
 976         XMLNodeList children = node.children();
 977
 978         for (XMLNodeIterator i = children.begin(); i != children.end(); ++i) {
 979
 980                 if ((*i)->name() == "Port") {
 981
 982                         prop = (*i)->property (X_("name"));
 983
 984                         if (prop) {
 985                                 string new_name;
 986                                 string old = prop->value();
 987                                 string::size_type slash = old.find ('/');
 988
 989                                 if (slash != string::npos) {
 990                                         /* port name is of form: <IO-name>/<port-name> */
 991
 992                                         new_name = name;
 993                                         new_name += old.substr (old.find ('/'));
 994
 995                                         prop->set_value (new_name);
 996                                 }
 997                         }
 998                 }
 999         }
1000 }
1001
1002
1003 int
1004 IO::make_connections_2X (const XMLNode& node, int /*version*/, bool in)
1005 {
1006         const XMLProperty* prop;
1007
1008         /* XXX: bundles ("connections" as was) */
1009
1010         if ((prop = node.property ("inputs")) != 0 && in) {
1011
1012                 string::size_type ostart = 0;
1013                 string::size_type start = 0;
1014                 string::size_type end = 0;
1015                 int i = 0;
1016                 int n;
1017                 vector<string> ports;
1018
1019                 string const str = prop->value ();
1020
1021                 while ((start = str.find_first_of ('{', ostart)) != string::npos) {
1022                         start += 1;
1023
1024                         if ((end = str.find_first_of ('}', start)) == string::npos) {
1025                                 error << string_compose(_("IO: badly formed string in XML node for inputs \"%1\""), str) << endmsg;
1026                                 return -1;
1027                         }
1028
1029                         if ((n = parse_io_string (str.substr (start, end - start), ports)) < 0) {
1030                                 error << string_compose(_("bad input string in XML node \"%1\""), str) << endmsg;
1031
1032                                 return -1;
1033
1034                         } else if (n > 0) {
1035
1036
1037                                 for (int x = 0; x < n; ++x) {
1038                                         /* XXX: this is a bit of a hack; need to check if it's always valid */
1039                                         string::size_type const p = ports[x].find ("/out");
1040                                         if (p != string::npos) {
1041                                                 ports[x].replace (p, 4, "/audio_out");
1042                                         }
1043                                         nth(i)->connect (ports[x]);
1044                                 }
1045                         }
1046
1047                         ostart = end+1;
1048                         i++;
1049                 }
1050
1051         }
1052
1053         if ((prop = node.property ("outputs")) != 0 && !in) {
1054
1055                 string::size_type ostart = 0;
1056                 string::size_type start = 0;
1057                 string::size_type end = 0;
1058                 int i = 0;
1059                 int n;
1060                 vector<string> ports;
1061
1062                 string const str = prop->value ();
1063
1064                 while ((start = str.find_first_of ('{', ostart)) != string::npos) {
1065                         start += 1;
1066
1067                         if ((end = str.find_first_of ('}', start)) == string::npos) {
1068                                 error << string_compose(_("IO: badly formed string in XML node for outputs \"%1\""), str) << endmsg;
1069                                 return -1;
1070                         }
1071
1072                         if ((n = parse_io_string (str.substr (start, end - start), ports)) < 0) {
1073                                 error << string_compose(_("IO: bad output string in XML node \"%1\""), str) << endmsg;
1074
1075                                 return -1;
1076
1077                         } else if (n > 0) {
1078
1079                                 for (int x = 0; x < n; ++x) {
1080                                         /* XXX: this is a bit of a hack; need to check if it's always valid */
1081                                         string::size_type const p = ports[x].find ("/in");
1082                                         if (p != string::npos) {
1083                                                 ports[x].replace (p, 3, "/audio_in");
1084                                         }
1085                                         nth(i)->connect (ports[x]);
1086                                 }
1087                         }
1088
1089                         ostart = end+1;
1090                         i++;
1091                 }
1092         }
1093
1094         return 0;
1095 }
1096
1097 int
1098 IO::set_ports (const string& str)
1099 {
1100         vector<string> ports;
1101         int i;
1102         int n;
1103         uint32_t nports;
1104
1105         if ((nports = count (str.begin(), str.end(), '{')) == 0) {
1106                 return 0;
1107         }
1108
1109         {
1110                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
1111
1112                 // FIXME: audio-only
1113                 if (ensure_ports (ChanCount(DataType::AUDIO, nports), true, this)) {
1114                         return -1;
1115                 }
1116         }
1117
1118         string::size_type start, end, ostart;
1119
1120         ostart = 0;
1121         start = 0;
1122         end = 0;
1123         i = 0;
1124
1125         while ((start = str.find_first_of ('{', ostart)) != string::npos) {
1126                 start += 1;
1127
1128                 if ((end = str.find_first_of ('}', start)) == string::npos) {
1129                         error << string_compose(_("IO: badly formed string in XML node for inputs \"%1\""), str) << endmsg;
1130                         return -1;
1131                 }
1132
1133                 if ((n = parse_io_string (str.substr (start, end - start), ports)) < 0) {
1134                         error << string_compose(_("bad input string in XML node \"%1\""), str) << endmsg;
1135
1136                         return -1;
1137
1138                 } else if (n > 0) {
1139
1140                         for (int x = 0; x < n; ++x) {
1141                                 connect (nth (i), ports[x], this);
1142                         }
1143                 }
1144
1145                 ostart = end+1;
1146                 i++;
1147         }
1148
1149         return 0;
1150 }
1151
1152 int
1153 IO::parse_io_string (const string& str, vector<string>& ports)
1154 {
1155         string::size_type pos, opos;
1156
1157         if (str.length() == 0) {
1158                 return 0;
1159         }
1160
1161         pos = 0;
1162         opos = 0;
1163
1164         ports.clear ();
1165
1166         while ((pos = str.find_first_of (',', opos)) != string::npos) {
1167                 ports.push_back (str.substr (opos, pos - opos));
1168                 opos = pos + 1;
1169         }
1170
1171         if (opos < str.length()) {
1172                 ports.push_back (str.substr(opos));
1173         }
1174
1175         return ports.size();
1176 }
1177
1178 int
1179 IO::parse_gain_string (const string& str, vector<string>& ports)
1180 {
1181         string::size_type pos, opos;
1182
1183         pos = 0;
1184         opos = 0;
1185         ports.clear ();
1186
1187         while ((pos = str.find_first_of (',', opos)) != string::npos) {
1188                 ports.push_back (str.substr (opos, pos - opos));
1189                 opos = pos + 1;
1190         }
1191
1192         if (opos < str.length()) {
1193                 ports.push_back (str.substr(opos));
1194         }
1195
1196         return ports.size();
1197 }
1198
1199 bool
1200 IO::set_name (const string& requested_name)
1201 {
1202         string name = requested_name;
1203
1204         if (_name == name) {
1205                 return true;
1206         }
1207
1208         /* replace all colons in the name. i wish we didn't have to do this */
1209
1210         replace_all (name, ":", "-");
1211
1212         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
1213                 string current_name = i->name();
1214                 current_name.replace (current_name.find (_name), _name.val().length(), name);
1215                 i->set_name (current_name);
1216         }
1217
1218         bool const r = SessionObject::set_name (name);
1219
1220         setup_bundle ();
1221
1222         return r;
1223 }
1224
1225 framecnt_t
1226 IO::latency () const
1227 {
1228         framecnt_t max_latency;
1229         framecnt_t latency;
1230
1231         max_latency = 0;
1232
1233         /* io lock not taken - must be protected by other means */
1234
1235         for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
1236                 if ((latency = i->private_latency_range (_direction == Output).max) > max_latency) {
1237                         DEBUG_TRACE (DEBUG::Latency, string_compose ("port %1 has %2 latency of %3 - use\n",
1238                                                                      name(),
1239                                                                      ((_direction == Output) ? "PLAYBACK" : "CAPTURE"),
1240                                                                      latency));
1241                         max_latency = latency;
1242                 }
1243         }
1244
1245         DEBUG_TRACE (DEBUG::Latency, string_compose ("%1: max %4 latency from %2 ports = %3\n",
1246                                                      name(), _ports.num_ports(), max_latency,
1247                                                      ((_direction == Output) ? "PLAYBACK" : "CAPTURE")));
1248         return max_latency;
1249 }
1250
1251 int
1252 IO::connect_ports_to_bundle (boost::shared_ptr<Bundle> c, bool exclusive, void* src)
1253 {
1254         BLOCK_PROCESS_CALLBACK ();
1255
1256         {
1257                 Glib::Threads::Mutex::Lock lm2 (io_lock);
1258
1259                 if (exclusive) {
1260                         for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
1261                                 i->disconnect_all ();
1262                         }
1263                 }
1264
1265                 c->connect (_bundle, _session.engine());
1266
1267                 /* If this is a UserBundle, make a note of what we've done */
1268
1269                 boost::shared_ptr<UserBundle> ub = boost::dynamic_pointer_cast<UserBundle> (c);
1270                 if (ub) {
1271
1272                         /* See if we already know about this one */
1273                         std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin();
1274                         while (i != _bundles_connected.end() && (*i)->bundle != ub) {
1275                                 ++i;
1276                         }
1277
1278                         if (i == _bundles_connected.end()) {
1279                                 /* We don't, so make a note */
1280                                 _bundles_connected.push_back (new UserBundleInfo (this, ub));
1281                         }
1282                 }
1283         }
1284
1285         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
1286         return 0;
1287 }
1288
1289 int
1290 IO::disconnect_ports_from_bundle (boost::shared_ptr<Bundle> c, void* src)
1291 {
1292         BLOCK_PROCESS_CALLBACK ();
1293
1294         {
1295                 Glib::Threads::Mutex::Lock lm2 (io_lock);
1296
1297                 c->disconnect (_bundle, _session.engine());
1298
1299                 /* If this is a UserBundle, make a note of what we've done */
1300
1301                 boost::shared_ptr<UserBundle> ub = boost::dynamic_pointer_cast<UserBundle> (c);
1302                 if (ub) {
1303
1304                         std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin();
1305                         while (i != _bundles_connected.end() && (*i)->bundle != ub) {
1306                                 ++i;
1307                         }
1308
1309                         if (i != _bundles_connected.end()) {
1310                                 delete *i;
1311                                 _bundles_connected.erase (i);
1312                         }
1313                 }
1314         }
1315
1316         changed (IOChange (IOChange::ConnectionsChanged), src); /* EMIT SIGNAL */
1317         return 0;
1318 }
1319
1320
1321 int
1322 IO::disable_connecting ()
1323 {
1324         connecting_legal = false;
1325         return 0;
1326 }
1327
1328 int
1329 IO::enable_connecting ()
1330 {
1331         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock());
1332         connecting_legal = true;
1333         boost::optional<int> r = ConnectingLegal ();
1334         return r.get_value_or (0);
1335 }
1336
1337 void
1338 IO::bundle_changed (Bundle::Change /*c*/)
1339 {
1340         /* XXX */
1341 //      connect_input_ports_to_bundle (_input_bundle, this);
1342 }
1343
1344
1345 string
1346 IO::build_legal_port_name (DataType type)
1347 {
1348         const int name_size = AudioEngine::instance()->port_name_size();
1349         int limit;
1350         string suffix;
1351
1352         if (type == DataType::AUDIO) {
1353                 suffix = X_("audio");
1354         } else if (type == DataType::MIDI) {
1355                 suffix = X_("midi");
1356         } else {
1357                 throw unknown_type();
1358         }
1359
1360         /* note that if "in" or "out" are translated it will break a session
1361            across locale switches because a port's connection list will
1362            show (old) translated names, but the current port name will
1363            use the (new) translated name.
1364         */
1365
1366         if (_sendish) {
1367                 if (_direction == Input) {
1368                         suffix += X_("_return");
1369                 } else {
1370                         suffix += X_("_send");
1371                 }
1372         } else {
1373                 if (_direction == Input) {
1374                         suffix += X_("_in");
1375                 } else {
1376                         suffix += X_("_out");
1377                 }
1378         }
1379
1380         // allow up to 4 digits for the output port number, plus the slash, suffix and extra space
1381
1382         limit = name_size - AudioEngine::instance()->my_name().length() - (suffix.length() + 5);
1383
1384         std::vector<char> buf1(name_size+1);
1385         std::vector<char> buf2(name_size+1);
1386
1387         /* colons are illegal in port names, so fix that */
1388
1389         string nom = _name.val();
1390         replace_all (nom, ":", ";");
1391
1392         snprintf (&buf1[0], name_size+1, ("%.*s/%s"), limit, nom.c_str(), suffix.c_str());
1393
1394         int port_number = find_port_hole (&buf1[0]);
1395         snprintf (&buf2[0], name_size+1, "%s %d", &buf1[0], port_number);
1396
1397         return string (&buf2[0]);
1398 }
1399
1400 int32_t
1401 IO::find_port_hole (const char* base)
1402 {
1403         /* CALLER MUST HOLD IO LOCK */
1404
1405         uint32_t n;
1406
1407         if (_ports.empty()) {
1408                 return 1;
1409         }
1410
1411         /* we only allow up to 4 characters for the port number
1412          */
1413
1414         for (n = 1; n < 9999; ++n) {
1415                 std::vector<char> buf (AudioEngine::instance()->port_name_size());
1416                 PortSet::iterator i = _ports.begin();
1417
1418                 snprintf (&buf[0], buf.size()+1, _("%s %u"), base, n);
1419
1420                 for ( ; i != _ports.end(); ++i) {
1421                         if (string(i->name()) == string(&buf[0])) {
1422                                 break;
1423                         }
1424                 }
1425
1426                 if (i == _ports.end()) {
1427                         break;
1428                 }
1429         }
1430         return n;
1431 }
1432
1433
1434 boost::shared_ptr<AudioPort>
1435 IO::audio(uint32_t n) const
1436 {
1437         return _ports.nth_audio_port (n);
1438
1439 }
1440
1441 boost::shared_ptr<MidiPort>
1442 IO::midi(uint32_t n) const
1443 {
1444         return _ports.nth_midi_port (n);
1445 }
1446
1447 /**
1448  *  Setup a bundle that describe our inputs or outputs. Also creates the bundle if necessary.
1449  */
1450
1451 void
1452 IO::setup_bundle ()
1453 {
1454         char buf[32];
1455
1456         if (!_bundle) {
1457                 _bundle.reset (new Bundle (_direction == Input));
1458         }
1459
1460         _bundle->suspend_signals ();
1461
1462         _bundle->remove_channels ();
1463
1464         if (_direction == Input) {
1465                 snprintf(buf, sizeof (buf), _("%s in"), _name.val().c_str());
1466         } else {
1467                 snprintf(buf, sizeof (buf), _("%s out"), _name.val().c_str());
1468         }
1469         _bundle->set_name (buf);
1470
1471         int c = 0;
1472         for (DataType::iterator i = DataType::begin(); i != DataType::end(); ++i) {
1473
1474                 uint32_t const N = _ports.count().get (*i);
1475                 for (uint32_t j = 0; j < N; ++j) {
1476                         _bundle->add_channel (bundle_channel_name (j, N, *i), *i);
1477                         _bundle->set_port (c, _session.engine().make_port_name_non_relative (_ports.port(*i, j)->name()));
1478                         ++c;
1479                 }
1480
1481         }
1482
1483         _bundle->resume_signals ();
1484 }
1485
1486 /** @return Bundles connected to our ports */
1487 BundleList
1488 IO::bundles_connected ()
1489 {
1490         BundleList bundles;
1491
1492         /* User bundles */
1493         for (std::vector<UserBundleInfo*>::iterator i = _bundles_connected.begin(); i != _bundles_connected.end(); ++i) {
1494                 bundles.push_back ((*i)->bundle);
1495         }
1496
1497         /* Session bundles */
1498         boost::shared_ptr<ARDOUR::BundleList> b = _session.bundles ();
1499         for (ARDOUR::BundleList::iterator i = b->begin(); i != b->end(); ++i) {
1500                 if ((*i)->connected_to (_bundle, _session.engine())) {
1501                         bundles.push_back (*i);
1502                 }
1503         }
1504
1505         /* Route bundles */
1506
1507         boost::shared_ptr<ARDOUR::RouteList> r = _session.get_routes ();
1508
1509         if (_direction == Input) {
1510                 for (ARDOUR::RouteList::iterator i = r->begin(); i != r->end(); ++i) {
1511                         if ((*i)->output()->bundle()->connected_to (_bundle, _session.engine())) {
1512                                 bundles.push_back ((*i)->output()->bundle());
1513                         }
1514                 }
1515         } else {
1516                 for (ARDOUR::RouteList::iterator i = r->begin(); i != r->end(); ++i) {
1517                         if ((*i)->input()->bundle()->connected_to (_bundle, _session.engine())) {
1518                                 bundles.push_back ((*i)->input()->bundle());
1519                         }
1520                 }
1521         }
1522
1523         return bundles;
1524 }
1525
1526
1527 IO::UserBundleInfo::UserBundleInfo (IO* io, boost::shared_ptr<UserBundle> b)
1528 {
1529         bundle = b;
1530         b->Changed.connect_same_thread (changed, boost::bind (&IO::bundle_changed, io, _1));
1531 }
1532
1533 std::string
1534 IO::bundle_channel_name (uint32_t c, uint32_t n, DataType t) const
1535 {
1536         char buf[32];
1537
1538         if (t == DataType::AUDIO) {
1539
1540                 switch (n) {
1541                 case 1:
1542                         return _("mono");
1543                 case 2:
1544                         return c == 0 ? _("L") : _("R");
1545                 default:
1546                         snprintf (buf, sizeof(buf), _("%d"), (c + 1));
1547                         return buf;
1548                 }
1549
1550         } else {
1551
1552                 snprintf (buf, sizeof(buf), _("%d"), (c + 1));
1553                 return buf;
1554
1555         }
1556
1557         return "";
1558 }
1559
1560 string
1561 IO::name_from_state (const XMLNode& node)
1562 {
1563         const XMLProperty* prop;
1564
1565         if ((prop = node.property ("name")) != 0) {
1566                 return prop->value();
1567         }
1568
1569         return string();
1570 }
1571
1572 void
1573 IO::set_name_in_state (XMLNode& node, const string& new_name)
1574 {
1575         node.add_property (X_("name"), new_name);
1576         XMLNodeList children = node.children ();
1577         for (XMLNodeIterator i = children.begin(); i != children.end(); ++i) {
1578                 if ((*i)->name() == X_("Port")) {
1579                         string const old_name = (*i)->property(X_("name"))->value();
1580                         string const old_name_second_part = old_name.substr (old_name.find_first_of ("/") + 1);
1581                         (*i)->add_property (X_("name"), string_compose ("%1/%2", new_name, old_name_second_part));
1582                 }
1583         }
1584 }
1585
1586 bool
1587 IO::connected () const
1588 {
1589         /* do we have any connections at all? */
1590
1591         for (PortSet::const_iterator p = _ports.begin(); p != _ports.end(); ++p) {
1592                 if (p->connected()) {
1593                         return true;
1594                 }
1595         }
1596
1597         return false;
1598 }
1599
1600 bool
1601 IO::connected_to (boost::shared_ptr<const IO> other) const
1602 {
1603         if (!other) {
1604                 return connected ();
1605         }
1606
1607         assert (_direction != other->direction());
1608
1609         uint32_t i, j;
1610         uint32_t no = n_ports().n_total();
1611         uint32_t ni = other->n_ports ().n_total();
1612
1613         for (i = 0; i < no; ++i) {
1614                 for (j = 0; j < ni; ++j) {
1615                         if (nth(i)->connected_to (other->nth(j)->name())) {
1616                                 return true;
1617                         }
1618                 }
1619         }
1620
1621         return false;
1622 }
1623
1624 bool
1625 IO::connected_to (const string& str) const
1626 {
1627         for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
1628                 if (i->connected_to (str)) {
1629                         return true;
1630                 }
1631         }
1632
1633         return false;
1634 }
1635
1636 /** Call a processor's ::run() method, giving it our buffers
1637  *  Caller must hold process lock.
1638  */
1639 void
1640 IO::process_input (boost::shared_ptr<Processor> proc, framepos_t start_frame, framepos_t end_frame, pframes_t nframes)
1641 {
1642         /* don't read the data into new buffers - just use the port buffers directly */
1643
1644         if (n_ports().n_total() == 0) {
1645                 /* We have no ports, so nothing to process */
1646                 return;
1647         }
1648
1649         _buffers.get_backend_port_addresses (_ports, nframes);
1650         if (proc) {
1651                 proc->run (_buffers, start_frame, end_frame, nframes, true);
1652         }
1653 }
1654
1655 void
1656 IO::collect_input (BufferSet& bufs, pframes_t nframes, ChanCount offset)
1657 {
1658         assert(bufs.available() >= _ports.count());
1659
1660         if (_ports.count() == ChanCount::ZERO) {
1661                 return;
1662         }
1663
1664         bufs.set_count (_ports.count());
1665
1666         for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
1667                 PortSet::iterator   i = _ports.begin(*t);
1668                 BufferSet::iterator b = bufs.begin(*t);
1669
1670                 for (uint32_t off = 0; off < offset.get(*t); ++off, ++b) {
1671                         if (b == bufs.end(*t)) {
1672                                 continue;
1673                         }
1674                 }
1675
1676                 for ( ; i != _ports.end(*t); ++i, ++b) {
1677                         Buffer& bb (i->get_buffer (nframes));
1678                         b->read_from (bb, nframes);
1679                 }
1680         }
1681 }
1682
1683 void
1684 IO::copy_to_outputs (BufferSet& bufs, DataType type, pframes_t nframes, framecnt_t offset)
1685 {
1686         // Copy any buffers 1:1 to outputs
1687
1688         PortSet::iterator o = _ports.begin(type);
1689         BufferSet::iterator i = bufs.begin(type);
1690         BufferSet::iterator prev = i;
1691
1692         while (i != bufs.end(type) && o != _ports.end (type)) {
1693                 Buffer& port_buffer (o->get_buffer (nframes));
1694                 port_buffer.read_from (*i, nframes, offset);
1695                 prev = i;
1696                 ++i;
1697                 ++o;
1698         }
1699
1700         // Copy last buffer to any extra outputs
1701
1702         while (o != _ports.end(type)) {
1703                 Buffer& port_buffer (o->get_buffer (nframes));
1704                 port_buffer.read_from (*prev, nframes, offset);
1705                 ++o;
1706         }
1707 }
1708
1709 boost::shared_ptr<Port>
1710 IO::port_by_name (const std::string& str) const
1711 {
1712         /* to be called only from ::set_state() - no locking */
1713
1714         for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
1715
1716                 if (i->name() == str) {
1717                         return boost::const_pointer_cast<Port> (*i);
1718                 }
1719         }
1720
1721         return boost::shared_ptr<Port> ();
1722 }
1723
1724 bool
1725 IO::physically_connected () const
1726 {
1727         for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
1728                 if (i->physically_connected()) {
1729                         return true;
1730                 }
1731         }
1732
1733         return false;
1734 }
1735
1736 bool
1737 IO::has_port (boost::shared_ptr<Port> p) const
1738 {
1739         Glib::Threads::Mutex::Lock lm (io_lock);
1740         return _ports.contains (p);
1741 }