gtk2_ardour/midi_time_axis.cc

   1 /*
   2     Copyright (C) 2000 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18
  19 #include <cstdlib>
  20 #include <cmath>
  21
  22 #include <algorithm>
  23 #include <string>
  24 #include <vector>
  25
  26 #include <sigc++/bind.h>
  27
  28 #include "pbd/error.h"
  29 #include "pbd/stl_delete.h"
  30 #include "pbd/whitespace.h"
  31 #include "pbd/basename.h"
  32 #include "pbd/enumwriter.h"
  33 #include "pbd/memento_command.h"
  34
  35 #include <gtkmm2ext/gtk_ui.h>
  36 #include <gtkmm2ext/selector.h>
  37 #include <gtkmm2ext/stop_signal.h>
  38 #include <gtkmm2ext/bindable_button.h>
  39 #include <gtkmm2ext/utils.h>
  40
  41 #include "ardour/midi_playlist.h"
  42 #include "ardour/midi_diskstream.h"
  43 #include "ardour/midi_patch_manager.h"
  44 #include "ardour/midi_source.h"
  45 #include "ardour/processor.h"
  46 #include "ardour/ladspa_plugin.h"
  47 #include "ardour/location.h"
  48 #include "ardour/playlist.h"
  49 #include "ardour/region_factory.h"
  50 #include "ardour/session.h"
  51 #include "ardour/session_playlist.h"
  52 #include "ardour/tempo.h"
  53 #include "ardour/utils.h"
  54
  55 #include "add_midi_cc_track_dialog.h"
  56 #include "ardour_ui.h"
  57 #include "automation_line.h"
  58 #include "automation_time_axis.h"
  59 #include "canvas-note-event.h"
  60 #include "canvas_impl.h"
  61 #include "crossfade_view.h"
  62 #include "editor.h"
  63 #include "enums.h"
  64 #include "ghostregion.h"
  65 #include "gui_thread.h"
  66 #include "keyboard.h"
  67 #include "midi_scroomer.h"
  68 #include "midi_streamview.h"
  69 #include "midi_region_view.h"
  70 #include "midi_time_axis.h"
  71 #include "piano_roll_header.h"
  72 #include "playlist_selector.h"
  73 #include "plugin_selector.h"
  74 #include "plugin_ui.h"
  75 #include "point_selection.h"
  76 #include "prompter.h"
  77 #include "region_view.h"
  78 #include "rgb_macros.h"
  79 #include "selection.h"
  80 #include "simplerect.h"
  81 #include "utils.h"
  82
  83 #include "ardour/midi_track.h"
  84
  85 #include "i18n.h"
  86
  87 using namespace ARDOUR;
  88 using namespace PBD;
  89 using namespace Gtk;
  90 using namespace sigc;
  91 using namespace Editing;
  92
  93 // Minimum height at which a control is displayed
  94 static const uint32_t MIDI_CONTROLS_BOX_MIN_HEIGHT = 162;
  95 static const uint32_t KEYBOARD_MIN_HEIGHT = 140;
  96
  97 MidiTimeAxisView::MidiTimeAxisView (PublicEditor& ed, Session& sess,
  98                 boost::shared_ptr<Route> rt, Canvas& canvas)
  99         : AxisView(sess) // virtually inherited
 100         , RouteTimeAxisView(ed, sess, rt, canvas)
 101         , _ignore_signals(false)
 102         , _range_scroomer(0)
 103         , _piano_roll_header(0)
 104         , _note_mode(Sustained)
 105         , _note_mode_item(0)
 106         , _percussion_mode_item(0)
 107         , _color_mode(MeterColors)
 108         , _meter_color_mode_item(0)
 109         , _channel_color_mode_item(0)
 110         , _track_color_mode_item(0)
 111 {
 112         subplugin_menu.set_name ("ArdourContextMenu");
 113
 114         _view = new MidiStreamView (*this);
 115
 116         ignore_toggle = false;
 117
 118         mute_button->set_active (false);
 119         solo_button->set_active (false);
 120
 121         if (is_midi_track()) {
 122                 controls_ebox.set_name ("MidiTimeAxisViewControlsBaseUnselected");
 123                 _note_mode = midi_track()->note_mode();
 124         } else { // MIDI bus (which doesn't exist yet..)
 125                 controls_ebox.set_name ("MidiBusControlsBaseUnselected");
 126         }
 127
 128         /* map current state of the route */
 129
 130         processors_changed ();
 131
 132         ensure_xml_node ();
 133
 134         set_state (*xml_node);
 135
 136         _route->processors_changed.connect (mem_fun(*this, &MidiTimeAxisView::processors_changed));
 137
 138         if (is_track()) {
 139                 _piano_roll_header = new PianoRollHeader(*midi_view());
 140                 _range_scroomer = new MidiScroomer(midi_view()->note_range_adjustment);
 141
 142                 controls_hbox.pack_start(*_range_scroomer);
 143                 controls_hbox.pack_start(*_piano_roll_header);
 144
 145                 controls_ebox.set_name ("MidiTrackControlsBaseUnselected");
 146                 controls_base_selected_name = "MidiTrackControlsBaseSelected";
 147                 controls_base_unselected_name = "MidiTrackControlsBaseUnselected";
 148
 149                 midi_view()->NoteRangeChanged.connect (mem_fun(*this, &MidiTimeAxisView::update_range));
 150
 151                 /* ask for notifications of any new RegionViews */
 152                 _view->RegionViewAdded.connect (mem_fun(*this, &MidiTimeAxisView::region_view_added));
 153                 _view->attach ();
 154         }
 155
 156         HBox* midi_controls_hbox = manage(new HBox());
 157
 158         MIDI::Name::MidiPatchManager& patch_manager = MIDI::Name::MidiPatchManager::instance();
 159
 160         MIDI::Name::MasterDeviceNames::Models::const_iterator m = patch_manager.all_models().begin();
 161         for (; m != patch_manager.all_models().end(); ++m) {
 162                 _model_selector.append_text(m->c_str());
 163         }
 164
 165         _model_selector.signal_changed().connect(mem_fun(*this, &MidiTimeAxisView::model_changed));
 166
 167         _custom_device_mode_selector.signal_changed().connect(
 168                         mem_fun(*this, &MidiTimeAxisView::custom_device_mode_changed));
 169
 170         // TODO: persist the choice
 171         // this initializes the comboboxes and sends out the signal
 172         _model_selector.set_active(0);
 173
 174         midi_controls_hbox->pack_start(_channel_selector, true, false);
 175         if (!patch_manager.all_models().empty()) {
 176                 _midi_controls_box.pack_start(_model_selector, true, false);
 177                 _midi_controls_box.pack_start(_custom_device_mode_selector, true, false);
 178         }
 179
 180         _midi_controls_box.pack_start(*midi_controls_hbox, true, true);
 181
 182         controls_vbox.pack_start(_midi_controls_box, false, false);
 183
 184         boost::shared_ptr<MidiDiskstream> diskstream = midi_track()->midi_diskstream();
 185
 186         // restore channel selector settings
 187         _channel_selector.set_channel_mode(diskstream->get_channel_mode(),
 188                         diskstream->get_channel_mask());
 189         _channel_selector.mode_changed.connect(
 190                 mem_fun(*midi_track()->midi_diskstream(), &MidiDiskstream::set_channel_mode));
 191
 192         XMLProperty *prop;
 193         if ((prop = xml_node->property ("color-mode")) != 0) {
 194                 _color_mode = ColorMode (string_2_enum(prop->value(), _color_mode));
 195                 if (_color_mode == ChannelColors) {
 196                         _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
 197                 }
 198         }
 199 }
 200
 201 MidiTimeAxisView::~MidiTimeAxisView ()
 202 {
 203         delete _piano_roll_header;
 204         _piano_roll_header = 0;
 205
 206         delete _range_scroomer;
 207         _range_scroomer = 0;
 208 }
 209
 210 void MidiTimeAxisView::model_changed()
 211 {
 212         std::list<std::string> device_modes = MIDI::Name::MidiPatchManager::instance()
 213                 .custom_device_mode_names_by_model(_model_selector.get_active_text());
 214
 215         _custom_device_mode_selector.clear_items();
 216
 217         for (std::list<std::string>::const_iterator i = device_modes.begin();
 218                         i != device_modes.end(); ++i) {
 219                 cerr << "found custom device mode " << *i << " thread_id: " << pthread_self() << endl;
 220                 _custom_device_mode_selector.append_text(*i);
 221         }
 222
 223         _custom_device_mode_selector.set_active(0);
 224 }
 225
 226 void MidiTimeAxisView::custom_device_mode_changed()
 227 {
 228         _midi_patch_settings_changed.emit(_model_selector.get_active_text(),
 229                         _custom_device_mode_selector.get_active_text());
 230 }
 231
 232 MidiStreamView*
 233 MidiTimeAxisView::midi_view()
 234 {
 235         return dynamic_cast<MidiStreamView*>(_view);
 236 }
 237
 238 guint32
 239 MidiTimeAxisView::show_at (double y, int& nth, Gtk::VBox *parent)
 240 {
 241         ensure_xml_node ();
 242         xml_node->add_property ("shown-editor", "yes");
 243
 244         guint32 ret = TimeAxisView::show_at (y, nth, parent);
 245         return ret;
 246 }
 247
 248 void
 249 MidiTimeAxisView::hide ()
 250 {
 251         ensure_xml_node ();
 252         xml_node->add_property ("shown-editor", "no");
 253
 254         TimeAxisView::hide ();
 255 }
 256
 257 void
 258 MidiTimeAxisView::set_height (uint32_t h)
 259 {
 260         RouteTimeAxisView::set_height (h);
 261
 262         if (height >= MIDI_CONTROLS_BOX_MIN_HEIGHT) {
 263                 _midi_controls_box.show();
 264         } else {
 265                 _midi_controls_box.hide();
 266         }
 267
 268         if (height >= KEYBOARD_MIN_HEIGHT) {
 269                 if (is_track() && _range_scroomer)
 270                         _range_scroomer->show();
 271                 if (is_track() && _piano_roll_header)
 272                         _piano_roll_header->show();
 273         } else {
 274                 if (is_track() && _range_scroomer)
 275                         _range_scroomer->hide();
 276                 if (is_track() && _piano_roll_header)
 277                         _piano_roll_header->hide();
 278         }
 279 }
 280
 281 void
 282 MidiTimeAxisView::append_extra_display_menu_items ()
 283 {
 284         using namespace Menu_Helpers;
 285
 286         MenuList& items = display_menu->items();
 287
 288         // Note range
 289         Menu *range_menu = manage(new Menu);
 290         MenuList& range_items = range_menu->items();
 291         range_menu->set_name ("ArdourContextMenu");
 292
 293         range_items.push_back (MenuElem (_("Show Full Range"), bind (
 294                         mem_fun(*this, &MidiTimeAxisView::set_note_range),
 295                         MidiStreamView::FullRange)));
 296
 297         range_items.push_back (MenuElem (_("Fit Contents"), bind (
 298                         mem_fun(*this, &MidiTimeAxisView::set_note_range),
 299                         MidiStreamView::ContentsRange)));
 300
 301         items.push_back (MenuElem (_("Note range"), *range_menu));
 302
 303         items.push_back (MenuElem (_("Note mode"), *build_note_mode_menu()));
 304 }
 305
 306 void
 307 MidiTimeAxisView::build_automation_action_menu ()
 308 {
 309         using namespace Menu_Helpers;
 310
 311         RouteTimeAxisView::build_automation_action_menu ();
 312
 313         MenuList& automation_items = automation_action_menu->items();
 314
 315         automation_items.push_back (SeparatorElem());
 316         automation_items.push_back (MenuElem (_("Controller..."),
 317                         mem_fun(*this, &MidiTimeAxisView::add_cc_track)));
 318         automation_items.push_back (MenuElem (_("Program Change"),
 319                         sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 320                                 Evoral::Parameter(MidiPgmChangeAutomation))));
 321         automation_items.push_back (MenuElem (_("Bender"),
 322                         sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 323                                 Evoral::Parameter(MidiPitchBenderAutomation))));
 324         automation_items.push_back (MenuElem (_("Pressure"),
 325                         sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 326                                 Evoral::Parameter(MidiChannelPressureAutomation))));
 327 }
 328
 329 Gtk::Menu*
 330 MidiTimeAxisView::build_note_mode_menu()
 331 {
 332         using namespace Menu_Helpers;
 333
 334         Menu* mode_menu = manage (new Menu);
 335         MenuList& items = mode_menu->items();
 336         mode_menu->set_name ("ArdourContextMenu");
 337
 338         RadioMenuItem::Group mode_group;
 339         items.push_back (RadioMenuElem (mode_group, _("Sustained"),
 340                                 bind (mem_fun (*this, &MidiTimeAxisView::set_note_mode), Sustained)));
 341         _note_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 342         _note_mode_item->set_active(_note_mode == Sustained);
 343
 344         items.push_back (RadioMenuElem (mode_group, _("Percussive"),
 345                                 bind (mem_fun (*this, &MidiTimeAxisView::set_note_mode), Percussive)));
 346         _percussion_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 347         _percussion_mode_item->set_active(_note_mode == Percussive);
 348
 349         return mode_menu;
 350 }
 351
 352 Gtk::Menu*
 353 MidiTimeAxisView::build_color_mode_menu()
 354 {
 355         using namespace Menu_Helpers;
 356
 357         Menu* mode_menu = manage (new Menu);
 358         MenuList& items = mode_menu->items();
 359         mode_menu->set_name ("ArdourContextMenu");
 360
 361         RadioMenuItem::Group mode_group;
 362         items.push_back (RadioMenuElem (mode_group, _("Meter Colors"),
 363                                 bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), MeterColors)));
 364         _meter_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 365         _meter_color_mode_item->set_active(_color_mode == MeterColors);
 366
 367         items.push_back (RadioMenuElem (mode_group, _("Channel Colors"),
 368                                 bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), ChannelColors)));
 369         _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 370         _channel_color_mode_item->set_active(_color_mode == ChannelColors);
 371
 372         items.push_back (RadioMenuElem (mode_group, _("Track Color"),
 373                                 bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), TrackColor)));
 374         _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 375         _channel_color_mode_item->set_active(_color_mode == TrackColor);
 376
 377         return mode_menu;
 378 }
 379
 380 void
 381 MidiTimeAxisView::set_note_mode(NoteMode mode)
 382 {
 383         if (_note_mode != mode || midi_track()->note_mode() != mode) {
 384                 _note_mode = mode;
 385                 midi_track()->set_note_mode(mode);
 386                 _view->redisplay_diskstream();
 387         }
 388 }
 389
 390 void
 391 MidiTimeAxisView::set_color_mode(ColorMode mode)
 392 {
 393         if (_color_mode != mode) {
 394                 if (mode == ChannelColors) {
 395                         _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
 396                 } else {
 397                         _channel_selector.set_default_channel_color();
 398                 }
 399
 400                 _color_mode = mode;
 401                 xml_node->add_property ("color-mode", enum_2_string(_color_mode));
 402                 _view->redisplay_diskstream();
 403         }
 404 }
 405
 406 void
 407 MidiTimeAxisView::set_note_range(MidiStreamView::VisibleNoteRange range)
 408 {
 409         if (!_ignore_signals)
 410                 midi_view()->set_note_range(range);
 411 }
 412
 413
 414 void
 415 MidiTimeAxisView::update_range()
 416 {
 417         MidiGhostRegion* mgr;
 418
 419         for(list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 420                 if ((mgr = dynamic_cast<MidiGhostRegion*>(*i)) != 0) {
 421                         mgr->update_range();
 422                 }
 423         }
 424 }
 425
 426 void
 427 MidiTimeAxisView::show_all_automation ()
 428 {
 429         if (midi_track()) {
 430                 const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
 431                                 midi_playlist()->contained_automation();
 432
 433                 for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
 434                         create_automation_child(*i, true);
 435                 }
 436         }
 437
 438         RouteTimeAxisView::show_all_automation ();
 439 }
 440
 441 void
 442 MidiTimeAxisView::show_existing_automation ()
 443 {
 444         if (midi_track()) {
 445                 const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
 446                                 midi_playlist()->contained_automation();
 447
 448                 for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
 449                         create_automation_child(*i, true);
 450                 }
 451         }
 452
 453         RouteTimeAxisView::show_existing_automation ();
 454 }
 455
 456 /** Prompt for a controller with a dialog and add an automation track for it
 457  */
 458 void
 459 MidiTimeAxisView::add_cc_track()
 460 {
 461         int response;
 462         Evoral::Parameter param(0, 0, 0);
 463
 464         {
 465                 AddMidiCCTrackDialog dialog;
 466                 dialog.set_transient_for (_editor);
 467                 response = dialog.run();
 468
 469                 if (response == Gtk::RESPONSE_ACCEPT)
 470                         param = dialog.parameter();
 471         }
 472
 473         if (param.type() != 0 && response == Gtk::RESPONSE_ACCEPT)
 474                 create_automation_child(param, true);
 475 }
 476
 477
 478 /** Add an automation track for the given parameter (pitch bend, channel pressure).
 479  */
 480 void
 481 MidiTimeAxisView::add_parameter_track(const Evoral::Parameter& param)
 482 {
 483         if ( !EventTypeMap::instance().is_midi_parameter(param) ) {
 484                 error << "MidiTimeAxisView: unknown automation child "
 485                         << ARDOUR::EventTypeMap::instance().to_symbol(param) << endmsg;
 486                 return;
 487         }
 488
 489         // create the parameter lane for each selected channel
 490         uint16_t selected_channels = _channel_selector.get_selected_channels();
 491
 492         for (uint8_t i = 0; i < 16; i++) {
 493                 if (selected_channels & (0x0001 << i)) {
 494                         Evoral::Parameter param_with_channel(param.type(), i, param.id());
 495                         create_automation_child(param_with_channel, true);
 496                 }
 497         }
 498 }
 499
 500 void
 501 MidiTimeAxisView::create_automation_child (const Evoral::Parameter& param, bool show)
 502 {
 503         /* These controllers are region "automation", so we do not create
 504          * an AutomationList/Line for the track */
 505
 506         if (param.type() == NullAutomation) {
 507                 cerr << "WARNING: Attempt to create NullAutomation child, ignoring" << endl;
 508                 return;
 509         }
 510
 511         AutomationTracks::iterator existing = _automation_tracks.find(param);
 512         if (existing != _automation_tracks.end())
 513                 return;
 514
 515         boost::shared_ptr<AutomationControl> c = _route->get_control (param);
 516
 517         assert(c);
 518
 519         boost::shared_ptr<AutomationTimeAxisView> track(new AutomationTimeAxisView (_session,
 520                         _route, boost::shared_ptr<ARDOUR::Automatable>(), c,
 521                         _editor,
 522                         *this,
 523                         true,
 524                         parent_canvas,
 525                         _route->describe_parameter(param)));
 526
 527         add_automation_child(param, track, show);
 528 }
 529
 530
 531 void
 532 MidiTimeAxisView::route_active_changed ()
 533 {
 534         RouteUI::route_active_changed ();
 535
 536         if (is_track()) {
 537                 if (_route->active()) {
 538                         controls_ebox.set_name ("MidiTrackControlsBaseUnselected");
 539                         controls_base_selected_name = "MidiTrackControlsBaseSelected";
 540                         controls_base_unselected_name = "MidiTrackControlsBaseUnselected";
 541                 } else {
 542                         controls_ebox.set_name ("MidiTrackControlsBaseInactiveUnselected");
 543                         controls_base_selected_name = "MidiTrackControlsBaseInactiveSelected";
 544                         controls_base_unselected_name = "MidiTrackControlsBaseInactiveUnselected";
 545                 }
 546         } else {
 547
 548                 throw; // wha?
 549
 550                 if (_route->active()) {
 551                         controls_ebox.set_name ("BusControlsBaseUnselected");
 552                         controls_base_selected_name = "BusControlsBaseSelected";
 553                         controls_base_unselected_name = "BusControlsBaseUnselected";
 554                 } else {
 555                         controls_ebox.set_name ("BusControlsBaseInactiveUnselected");
 556                         controls_base_selected_name = "BusControlsBaseInactiveSelected";
 557                         controls_base_unselected_name = "BusControlsBaseInactiveUnselected";
 558                 }
 559         }
 560 }
 561
 562 void
 563 MidiTimeAxisView::start_step_editing ()
 564 {
 565         step_edit_insert_position = _editor.get_preferred_edit_position ();
 566         step_edit_beat_pos = 0;
 567         step_edit_region = playlist()->top_region_at (step_edit_insert_position);
 568
 569         if (step_edit_region) {
 570                 RegionView* rv = view()->find_view (step_edit_region);
 571                 step_edit_region_view = dynamic_cast<MidiRegionView*> (rv);
 572         } else {
 573                 step_edit_region_view = 0;
 574         }
 575
 576         midi_track()->set_step_editing (true);
 577 }
 578
 579 void
 580 MidiTimeAxisView::stop_step_editing ()
 581 {
 582         midi_track()->set_step_editing (false);
 583 }
 584
 585 void
 586 MidiTimeAxisView::check_step_edit ()
 587 {
 588         MidiRingBuffer<nframes_t>& incoming (midi_track()->step_edit_ring_buffer());
 589         Evoral::Note<Evoral::MusicalTime> note;
 590         uint8_t* buf;
 591         uint32_t bufsize = 32;
 592
 593         buf = new uint8_t[bufsize];
 594
 595         while (incoming.read_space()) {
 596                 nframes_t time;
 597                 Evoral::EventType type;
 598                 uint32_t size;
 599
 600                 incoming.read_prefix (&time, &type, &size);
 601
 602                 if (size > bufsize) {
 603                         delete [] buf;
 604                         bufsize = size;
 605                         buf = new uint8_t[bufsize];
 606                 }
 607
 608                 incoming.read_contents (size, buf);
 609
 610                 if ((buf[0] & 0xf0) == MIDI_CMD_NOTE_ON) {
 611
 612                         if (step_edit_region == 0) {
 613                                 cerr << "Add new region first ..\n";
 614
 615                                 step_edit_region = add_region (step_edit_insert_position);
 616                                 RegionView* rv = view()->find_view (step_edit_region);
 617
 618                                 if (rv) {
 619                                         step_edit_region_view = dynamic_cast<MidiRegionView*>(rv);
 620                                 } else {
 621                                         fatal << X_("programming error: no view found for new MIDI region") << endmsg;
 622                                         /*NOTREACHED*/
 623                                 }
 624                         }
 625
 626                         if (step_edit_region_view) {
 627
 628                                 bool success;
 629                                 Evoral::MusicalTime beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
 630
 631                                 if (!success) {
 632                                         continue;
 633                                 }
 634
 635                                 cerr << "will add note at " << step_edit_beat_pos << endl;
 636                                 step_edit_region_view->add_note (buf[0] & 0xf, buf[1], buf[2], step_edit_beat_pos, beats);
 637                                 step_edit_beat_pos += beats;
 638                         }
 639                 }
 640
 641         }
 642 }
 643
 644 boost::shared_ptr<Region>
 645 MidiTimeAxisView::add_region (nframes64_t pos)
 646 {
 647         Editor* real_editor = dynamic_cast<Editor*> (&_editor);
 648
 649         real_editor->begin_reversible_command (_("create region"));
 650         XMLNode &before = playlist()->get_state();
 651
 652         nframes64_t start = pos;
 653         real_editor->snap_to (start, -1);
 654         const Meter& m = _session.tempo_map().meter_at(start);
 655         const Tempo& t = _session.tempo_map().tempo_at(start);
 656         double length = floor (m.frames_per_bar(t, _session.frame_rate()));
 657
 658         const boost::shared_ptr<MidiDiskstream> diskstream =
 659                 boost::dynamic_pointer_cast<MidiDiskstream>(view()->trackview().track()->diskstream());
 660
 661         boost::shared_ptr<Source> src = _session.create_midi_source_for_session (*diskstream.get());
 662
 663         boost::shared_ptr<Region> region = (RegionFactory::create (src, 0, (nframes_t) length,
 664                                                                    PBD::basename_nosuffix(src->name())));
 665
 666         playlist()->add_region (region, start);
 667         XMLNode &after = playlist()->get_state();
 668         _session.add_command (new MementoCommand<Playlist> (*playlist().get(), &before, &after));
 669
 670         real_editor->commit_reversible_command();
 671
 672         return region;
 673 }