gtk2_ardour/transport_masters_dialog.cc

   1 /*
   2     Copyright (C) 2018 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 <gtkmm/stock.h>
  20
  21 #include "pbd/enumwriter.h"
  22 #include "pbd/i18n.h"
  23
  24 #include "temporal/time.h"
  25
  26 #include "ardour/audioengine.h"
  27 #include "ardour/session.h"
  28 #include "ardour/transport_master.h"
  29 #include "ardour/transport_master_manager.h"
  30
  31 #include "widgets/tooltips.h"
  32
  33 #include "gtkmm2ext/utils.h"
  34 #include "gtkmm2ext/gui_thread.h"
  35
  36 #include "ardour_ui.h"
  37 #include "floating_text_entry.h"
  38 #include "transport_masters_dialog.h"
  39
  40
  41 using namespace std;
  42 using namespace Gtk;
  43 using namespace Gtkmm2ext;
  44 using namespace ARDOUR;
  45 using namespace PBD;
  46 using namespace ArdourWidgets;
  47
  48 TransportMastersWidget::TransportMastersWidget ()
  49         : table (4, 13)
  50         , add_button (_("Add a new Transport Master"))
  51 {
  52         pack_start (table, PACK_EXPAND_WIDGET, 12);
  53         pack_start (add_button, FALSE, FALSE);
  54
  55         add_button.signal_clicked ().connect (sigc::mem_fun (*this, &TransportMastersWidget::add_master));
  56
  57         col_title[0].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Use")));
  58         col_title[1].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Name")));
  59         col_title[2].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Type")));
  60         col_title[3].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Format/\nBPM")));
  61         col_title[4].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Current")));
  62         col_title[5].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Last")));
  63         col_title[6].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Timestamp")));
  64         col_title[7].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Delta")));
  65         col_title[8].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Collect")));
  66         col_title[9].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Data Source")));
  67         col_title[10].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Active\nCommands")));
  68         col_title[11].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Clock\nSynced")));
  69         col_title[12].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("29.97/\n30")));
  70         col_title[13].set_markup (string_compose ("<span weight=\"bold\">%1</span>", _("Remove")));
  71
  72         set_tooltip (col_title[12], _("<b>When enabled</b> the external timecode source is assumed to use 29.97 fps instead of 30000/1001.\n"
  73                                       "SMPTE 12M-1999 specifies 29.97df as 30000/1001. The spec further mentions that "
  74                                       "drop-sample timecode has an accumulated error of -86ms over a 24-hour period.\n"
  75                                       "Drop-sample timecode would compensate exactly for a NTSC color frame rate of 30 * 0.9990 (ie 29.970000). "
  76                                       "That is not the actual rate. However, some vendors use that rate - despite it being against the specs - "
  77                                       "because the variant of using exactly 29.97 fps has zero timecode drift.\n"
  78                              ));
  79
  80         set_tooltip (col_title[11], string_compose (_("<b>When enabled</b> the external timecode source is assumed to be sample-clock synced to the audio interface\n"
  81                                                       "being used by %1."), PROGRAM_NAME));
  82
  83         table.set_spacings (6);
  84
  85         TransportMasterManager::instance().CurrentChanged.connect (current_connection, invalidator (*this), boost::bind (&TransportMastersWidget::current_changed, this, _1, _2), gui_context());
  86         TransportMasterManager::instance().Added.connect (add_connection, invalidator (*this), boost::bind (&TransportMastersWidget::rebuild, this), gui_context());
  87         TransportMasterManager::instance().Removed.connect (remove_connection, invalidator (*this), boost::bind (&TransportMastersWidget::rebuild, this), gui_context());
  88
  89         rebuild ();
  90 }
  91
  92 TransportMastersWidget::~TransportMastersWidget ()
  93 {
  94         for (vector<Row*>::iterator r = rows.begin(); r != rows.end(); ++r) {
  95                 delete *r;
  96         }
  97 }
  98
  99 void
 100 TransportMastersWidget::set_transport_master (boost::shared_ptr<TransportMaster> tm)
 101 {
 102         _session->request_sync_source (tm);
 103 }
 104
 105 void
 106 TransportMastersWidget::current_changed (boost::shared_ptr<TransportMaster> old_master, boost::shared_ptr<TransportMaster> new_master)
 107 {
 108         for (vector<Row*>::iterator r = rows.begin(); r != rows.end(); ++r) {
 109                 if ((*r)->tm == new_master) {
 110                         (*r)->use_button.set_active (true);
 111                         break; /* there can only be one */
 112                 }
 113         }
 114 }
 115
 116 void
 117 TransportMastersWidget::add_master ()
 118 {
 119         AddTransportMasterDialog d;
 120
 121         d.present ();
 122         int r = d.run ();
 123
 124         switch (r) {
 125         case RESPONSE_ACCEPT:
 126                 break;
 127         default:
 128                 return;
 129         }
 130
 131         TransportMasterManager::instance().add (d.get_type(), d.get_name());
 132 }
 133
 134 void
 135 TransportMastersWidget::rebuild ()
 136 {
 137         TransportMasterManager::TransportMasters const & masters (TransportMasterManager::instance().transport_masters());
 138
 139         container_clear (table);
 140
 141         for (vector<Row*>::iterator r = rows.begin(); r != rows.end(); ++r) {
 142                 delete *r;
 143         }
 144
 145         rows.clear ();
 146         table.resize (masters.size()+1, 14);
 147
 148         for (size_t col = 0; col < sizeof (col_title) / sizeof (col_title[0]); ++col) {
 149                 table.attach (col_title[col], col, col+1, 0, 1);
 150         }
 151
 152         uint32_t n = 1;
 153
 154         Gtk::RadioButtonGroup use_button_group;
 155
 156         for (TransportMasterManager::TransportMasters::const_iterator m = masters.begin(); m != masters.end(); ++m, ++n) {
 157
 158                 Row* r = new Row (*this);
 159                 rows.push_back (r);
 160
 161                 r->tm = *m;
 162                 r->label.set_text ((*m)->name());
 163                 r->type.set_text (enum_2_string  ((*m)->type()));
 164
 165                 r->use_button.set_group (use_button_group);
 166
 167                 if (TransportMasterManager::instance().current() == r->tm) {
 168                         r->use_button.set_active (true);
 169                 }
 170
 171                 int col = 0;
 172
 173                 r->label_box.add (r->label);
 174
 175                 table.attach (r->use_button, col, col+1, n, n+1); ++col;
 176                 table.attach (r->label_box, col, col+1, n, n+1); ++col;
 177                 table.attach (r->type, col, col+1, n, n+1); ++col;
 178                 table.attach (r->format, col, col+1, n, n+1); ++col;
 179                 table.attach (r->current, col, col+1, n, n+1); ++col;
 180                 table.attach (r->last, col, col+1, n, n+1); ++col;
 181                 table.attach (r->timestamp, col, col+1, n, n+1); ++col;
 182                 table.attach (r->delta, col, col+1, n, n+1); ++col;
 183                 table.attach (r->collect_button, col, col+1, n, n+1); ++col;
 184                 table.attach (r->port_combo, col, col+1, n, n+1); ++col;
 185                 table.attach (r->request_options, col, col+1, n, n+1); ++col;
 186
 187                 boost::shared_ptr<TimecodeTransportMaster> ttm (boost::dynamic_pointer_cast<TimecodeTransportMaster> (r->tm));
 188
 189                 if (ttm) {
 190                         table.attach (r->sclock_synced_button, col, col+1, n, n+1); ++col;
 191                         table.attach (r->fr2997_button, col, col+1, n, n+1); ++col;
 192                         r->fr2997_button.signal_toggled().connect (sigc::mem_fun (*r, &TransportMastersWidget::Row::fr2997_button_toggled));
 193                 } else {
 194                         col += 2;
 195                 }
 196
 197                 if (r->tm->removeable()) {
 198                         table.attach (r->remove_button, col, col+1, n, n+1); ++col;
 199                 } else {
 200                         col++;
 201                 }
 202
 203                 table.show_all ();
 204
 205                 // r->label_box.set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
 206                 r->label_box.signal_button_press_event().connect (sigc::mem_fun (*r, &TransportMastersWidget::Row::name_press));
 207                 r->port_combo.signal_changed().connect (sigc::mem_fun (*r, &TransportMastersWidget::Row::port_choice_changed));
 208                 r->use_button.signal_toggled().connect (sigc::mem_fun (*r, &TransportMastersWidget::Row::use_button_toggled));
 209                 r->collect_button.signal_toggled().connect (sigc::mem_fun (*r, &TransportMastersWidget::Row::collect_button_toggled));
 210                 r->request_options.signal_button_press_event().connect (sigc::mem_fun (*r, &TransportMastersWidget::Row::request_option_press), false);
 211                 r->remove_button.signal_clicked().connect (sigc::mem_fun (*r, &TransportMastersWidget::Row::remove_clicked));
 212
 213                 if (ttm) {
 214                         r->sclock_synced_button.signal_toggled().connect (sigc::mem_fun (*r, &TransportMastersWidget::Row::sync_button_toggled));
 215                 }
 216
 217                 r->tm->PropertyChanged.connect (r->property_change_connection, invalidator (*this), boost::bind (&TransportMastersWidget::Row::prop_change, r, _1), gui_context());
 218
 219                 PropertyChange all_change;
 220                 all_change.add (Properties::locked);
 221                 all_change.add (Properties::collect);
 222                 all_change.add (Properties::connected);
 223
 224                 if (ttm) {
 225                         all_change.add (Properties::fr2997);
 226                         all_change.add (Properties::sclock_synced);
 227                 }
 228
 229                 r->prop_change (all_change);
 230         }
 231 }
 232
 233 TransportMastersWidget::Row::Row (TransportMastersWidget& p)
 234         : parent (p)
 235         , request_option_menu (0)
 236         , remove_button (X_("x"))
 237         , name_editor (0)
 238         , save_when (0)
 239         , ignore_active_change (false)
 240 {
 241 }
 242
 243 bool
 244 TransportMastersWidget::Row::name_press (GdkEventButton* ev)
 245 {
 246         if (ev->type == GDK_2BUTTON_PRESS && ev->button == 1) {
 247                 Gtk::Window* toplevel = dynamic_cast<Gtk::Window*> (label.get_toplevel());
 248                 if (!toplevel) {
 249                         return false;
 250                 }
 251                 name_editor = new FloatingTextEntry (toplevel, tm->name());
 252                 name_editor->use_text.connect (sigc::mem_fun (*this, &TransportMastersWidget::Row::name_edited));
 253                 name_editor->show ();
 254                 return true;
 255         }
 256         return false;
 257 }
 258
 259 void
 260 TransportMastersWidget::Row::remove_clicked ()
 261 {
 262         TransportMasterManager::instance().remove (tm->name());
 263 }
 264
 265 void
 266 TransportMastersWidget::Row::name_edited (string str, int ignored)
 267 {
 268         tm->set_name (str);
 269         /* floating text entry deletes itself */
 270         name_editor = 0;
 271 }
 272
 273 void
 274 TransportMastersWidget::Row::prop_change (PropertyChange what_changed)
 275 {
 276         if (what_changed.contains (Properties::locked)) {
 277         }
 278
 279         if (what_changed.contains (Properties::fr2997)) {
 280                 fr2997_button.set_active (boost::dynamic_pointer_cast<TimecodeTransportMaster> (tm)->fr2997());
 281         }
 282
 283         if (what_changed.contains (Properties::sclock_synced)) {
 284                 sclock_synced_button.set_active (boost::dynamic_pointer_cast<TimecodeTransportMaster> (tm)->sample_clock_synced());
 285         }
 286
 287         if (what_changed.contains (Properties::collect)) {
 288                 collect_button.set_active (tm->collect());
 289         }
 290
 291         if (what_changed.contains (Properties::connected)) {
 292                 populate_port_combo ();
 293         }
 294
 295         if (what_changed.contains (Properties::name)) {
 296                 label.set_text (tm->name());
 297         }
 298 }
 299
 300 void
 301 TransportMastersWidget::Row::use_button_toggled ()
 302 {
 303         if (use_button.get_active()) {
 304                 parent.set_transport_master (tm);
 305         }
 306 }
 307
 308 void
 309 TransportMastersWidget::Row::fr2997_button_toggled ()
 310 {
 311         boost::dynamic_pointer_cast<TimecodeTransportMaster>(tm)->set_fr2997 (fr2997_button.get_active());
 312 }
 313
 314 void
 315 TransportMastersWidget::Row::collect_button_toggled ()
 316 {
 317         tm->set_collect (collect_button.get_active());
 318 }
 319
 320 void
 321 TransportMastersWidget::Row::sync_button_toggled ()
 322 {
 323         tm->set_sample_clock_synced (sclock_synced_button.get_active());
 324 }
 325
 326 bool
 327 TransportMastersWidget::Row::request_option_press (GdkEventButton* ev)
 328 {
 329         if (ev->button == 1) {
 330                 if (!request_option_menu) {
 331                         build_request_options ();
 332                 }
 333                 request_option_menu->popup (1, ev->time);
 334                 return true;
 335         }
 336         return false;
 337 }
 338
 339 void
 340 TransportMastersWidget::Row::build_request_options ()
 341 {
 342         using namespace Gtk::Menu_Helpers;
 343
 344         request_option_menu = manage (new Menu);
 345
 346         MenuList& items (request_option_menu->items());
 347
 348         items.push_back (CheckMenuElem (_("Accept speed-changing commands (start/stop)")));
 349         Gtk::CheckMenuItem* i = dynamic_cast<Gtk::CheckMenuItem *> (&items.back ());
 350         i->set_active (tm->request_mask() & TR_Speed);
 351         items.push_back (CheckMenuElem (_("Accept locate commands")));
 352         i = dynamic_cast<Gtk::CheckMenuItem *> (&items.back ());
 353         i->set_active (tm->request_mask() & TR_Locate);
 354 }
 355
 356 Glib::RefPtr<Gtk::ListStore>
 357 TransportMastersWidget::Row::build_port_list (vector<string> const & ports)
 358 {
 359         Glib::RefPtr<Gtk::ListStore> store = ListStore::create (port_columns);
 360         TreeModel::Row row;
 361
 362         row = *store->append ();
 363         row[port_columns.full_name] = string();
 364         row[port_columns.short_name] = _("Disconnected");
 365
 366         for (vector<string>::const_iterator p = ports.begin(); p != ports.end(); ++p) {
 367
 368                 if (AudioEngine::instance()->port_is_mine (*p)) {
 369                         continue;
 370                 }
 371
 372                 row = *store->append ();
 373                 row[port_columns.full_name] = *p;
 374
 375                 std::string pn = ARDOUR::AudioEngine::instance()->get_pretty_name_by_name (*p);
 376                 if (pn.empty ()) {
 377                         pn = (*p).substr ((*p).find (':') + 1);
 378                 }
 379                 row[port_columns.short_name] = pn;
 380         }
 381
 382         return store;
 383 }
 384
 385 void
 386 TransportMastersWidget::Row::populate_port_combo ()
 387 {
 388         if (!tm->port()) {
 389                 port_combo.hide ();
 390                 return;
 391         } else {
 392                 port_combo.show ();
 393         }
 394
 395         vector<string> inputs;
 396
 397         if (tm->port()->type() == DataType::MIDI) {
 398                 ARDOUR::AudioEngine::instance()->get_ports ("", ARDOUR::DataType::MIDI, ARDOUR::PortFlags (ARDOUR::IsOutput), inputs);
 399         } else {
 400                 ARDOUR::AudioEngine::instance()->get_ports ("", ARDOUR::DataType::AUDIO, ARDOUR::PortFlags (ARDOUR::IsOutput), inputs);
 401         }
 402
 403         Glib::RefPtr<Gtk::ListStore> input = build_port_list (inputs);
 404         bool input_found = false;
 405         int n;
 406
 407         port_combo.set_model (input);
 408
 409         Gtk::TreeModel::Children children = input->children();
 410         Gtk::TreeModel::Children::iterator i;
 411         i = children.begin();
 412         ++i; /* skip "Disconnected" */
 413
 414
 415         for (n = 1;  i != children.end(); ++i, ++n) {
 416                 string port_name = (*i)[port_columns.full_name];
 417                 if (tm->port()->connected_to (port_name)) {
 418                         port_combo.set_active (n);
 419                         input_found = true;
 420                         break;
 421                 }
 422         }
 423
 424         if (!input_found) {
 425                 port_combo.set_active (0); /* disconnected */
 426         }
 427 }
 428
 429 void
 430 TransportMastersWidget::Row::port_choice_changed ()
 431 {
 432         if (ignore_active_change) {
 433                 return;
 434         }
 435
 436         TreeModel::iterator active = port_combo.get_active ();
 437         string new_port = (*active)[port_columns.full_name];
 438
 439         if (new_port.empty()) {
 440                 tm->port()->disconnect_all ();
 441                 return;
 442         }
 443
 444         if (!tm->port()->connected_to (new_port)) {
 445                 tm->port()->disconnect_all ();
 446                 tm->port()->connect (new_port);
 447         }
 448 }
 449
 450 void
 451 TransportMastersWidget::Row::update (Session* s, samplepos_t now)
 452 {
 453         using namespace Timecode;
 454
 455         samplepos_t pos;
 456         double speed;
 457         samplepos_t most_recent;
 458         samplepos_t when;
 459         stringstream ss;
 460         Time t;
 461         Time l;
 462         boost::shared_ptr<TimecodeTransportMaster> ttm;
 463         boost::shared_ptr<MIDIClock_TransportMaster> mtm;
 464
 465         if (s) {
 466
 467                 if (tm->speed_and_position (speed, pos, most_recent, when, now)) {
 468
 469                         sample_to_timecode (pos, t, false, false, 25, false, AudioEngine::instance()->sample_rate(), 100, false, 0);
 470                         sample_to_timecode (most_recent, l, false, false, 25, false, AudioEngine::instance()->sample_rate(), 100, false, 0);
 471
 472                         if ((ttm = boost::dynamic_pointer_cast<TimecodeTransportMaster> (tm))) {
 473                                 format.set_text (timecode_format_name (ttm->apparent_timecode_format()));
 474                                 last.set_text (Timecode::timecode_format_time (l));
 475                         } else if ((mtm = boost::dynamic_pointer_cast<MIDIClock_TransportMaster> (tm))) {
 476                                 char buf[8];
 477                                 snprintf (buf, sizeof (buf), "%.1f", mtm->bpm());
 478                                 format.set_text (buf);
 479                                 last.set_text ("");
 480                         } else {
 481                                 format.set_text ("");
 482                                 last.set_text ("");
 483                         }
 484                         current.set_text (Timecode::timecode_format_time (t));
 485                         delta.set_markup (tm->delta_string ());
 486
 487                         char gap[32];
 488                         const float seconds = (when - now) / (float) AudioEngine::instance()->sample_rate();
 489                         if (abs (seconds) < 1.0) {
 490                                 snprintf (gap, sizeof (gap), "%.3fs", seconds);
 491                         } else if (abs (seconds) < 4.0) {
 492                                 snprintf (gap, sizeof (gap), "%ds", (int) floor (seconds));
 493                         } else {
 494                                 snprintf (gap, sizeof (gap), "%s", _(">4s ago"));
 495                         }
 496                         timestamp.set_text (gap);
 497                         save_when = when;
 498
 499                 } else {
 500
 501                         if (save_when) {
 502                                 char gap[32];
 503
 504                                 const float seconds = (when - now) / (float) AudioEngine::instance()->sample_rate();
 505                                 if (abs (seconds) < 1.0) {
 506                                         snprintf (gap, sizeof (gap), "%.3fs", seconds);
 507                                 } else if (abs (seconds) < 4.0) {
 508                                         snprintf (gap, sizeof (gap), "%ds", (int) floor (seconds));
 509                                 } else {
 510                                         snprintf (gap, sizeof (gap), "%s", _(">4s ago"));
 511                                 }
 512                                 timestamp.set_text (gap);
 513                                 save_when = when;
 514                         }
 515                         delta.set_text ("");
 516                         current.set_text ("");
 517                 }
 518         }
 519 }
 520
 521 void
 522         TransportMastersWidget::update (samplepos_t /* audible */)
 523 {
 524         samplepos_t now = AudioEngine::instance()->sample_time ();
 525
 526         for (vector<Row*>::iterator r = rows.begin(); r != rows.end(); ++r) {
 527                 (*r)->update (_session, now);
 528         }
 529 }
 530
 531 void
 532 TransportMastersWidget::on_map ()
 533 {
 534         update_connection = ARDOUR_UI::Clock.connect (sigc::mem_fun (*this, &TransportMastersWidget::update));
 535         Gtk::VBox::on_map ();
 536 }
 537
 538 void
 539 TransportMastersWidget::on_unmap ()
 540 {
 541         update_connection.disconnect ();
 542         Gtk::VBox::on_unmap ();
 543 }
 544
 545 TransportMastersWindow::TransportMastersWindow ()
 546         : ArdourWindow (_("Transport Masters"))
 547 {
 548         add (w);
 549         w.show ();
 550 }
 551
 552 void
 553 TransportMastersWindow::on_realize ()
 554 {
 555         ArdourWindow::on_realize ();
 556         /* (try to) ensure that resizing is possible and the window can be moved (and closed) */
 557         get_window()->set_decorations (Gdk::DECOR_BORDER | Gdk::DECOR_RESIZEH | Gdk::DECOR_TITLE | Gdk::DECOR_MENU);
 558 }
 559
 560
 561
 562 void
 563 TransportMastersWindow::set_session (ARDOUR::Session* s)
 564 {
 565         ArdourWindow::set_session (s);
 566         w.set_session (s);
 567 }
 568
 569 TransportMastersWidget::AddTransportMasterDialog::AddTransportMasterDialog ()
 570         : ArdourDialog (_("Add Transport Master"), true, false)
 571         , name_label (_("Name"))
 572         , type_label (_("Type"))
 573 {
 574         name_hbox.set_spacing (6);
 575         name_hbox.pack_start (name_label, false, false);
 576         name_hbox.pack_start (name_entry, true, true);
 577
 578         type_hbox.set_spacing (6);
 579         type_hbox.pack_start (type_label, false, false);
 580         type_hbox.pack_start (type_combo, true, true);
 581
 582         vector<string> s;
 583
 584         s.push_back (X_("MTC"));
 585         s.push_back (X_("LTC"));
 586         s.push_back (X_("MIDI Clock"));
 587
 588         set_popdown_strings (type_combo, s);
 589         type_combo.set_active_text (X_("LTC"));
 590
 591         get_vbox()->pack_start (name_hbox, false, false);
 592         get_vbox()->pack_start (type_hbox, false, false);
 593
 594         add_button (_("Cancel"), RESPONSE_CANCEL);
 595         add_button (_("Add"), RESPONSE_ACCEPT);
 596
 597         name_entry.show ();
 598         type_combo.show ();
 599         name_label.show ();
 600         type_label.show ();
 601         name_hbox.show ();
 602         type_hbox.show ();
 603 }
 604
 605 string
 606 TransportMastersWidget::AddTransportMasterDialog::get_name () const
 607 {
 608         return name_entry.get_text ();
 609 }
 610
 611 SyncSource
 612 TransportMastersWidget::AddTransportMasterDialog::get_type() const
 613 {
 614         string t = type_combo.get_active_text ();
 615
 616         if (t == X_("MTC")) {
 617                 return MTC;
 618         } else if (t == X_("MIDI Clock")) {
 619                 return MIDIClock;
 620         }
 621
 622         return LTC;
 623 }