gtk2_ardour/step_editor.cc

   1 #include "ardour/midi_track.h"
   2 #include "ardour/midi_region.h"
   3 #include "ardour/tempo.h"
   4 #include "ardour/types.h"
   5
   6 #include "gui_thread.h"
   7 #include "midi_region_view.h"
   8 #include "public_editor.h"
   9 #include "step_editor.h"
  10 #include "step_entry.h"
  11
  12 using namespace ARDOUR;
  13 using namespace Gtk;
  14 using namespace std;
  15
  16 StepEditor::StepEditor (PublicEditor& e, boost::shared_ptr<MidiTrack> t, MidiTimeAxisView& mtv)
  17         : _editor (e)
  18         , _track (t)
  19         , step_editor (0)
  20         , _mtv (mtv)
  21 {
  22         step_edit_insert_position = 0;
  23         _step_edit_triplet_countdown = 0;
  24         _step_edit_within_chord = 0;
  25         _step_edit_chord_duration = 0.0;
  26         step_edit_region_view = 0;
  27
  28         _track->PlaylistChanged.connect (*this, invalidator (*this),
  29                                          boost::bind (&StepEditor::playlist_changed, this),
  30                                          gui_context());
  31         playlist_changed ();
  32 }
  33
  34 StepEditor::~StepEditor()
  35 {
  36         delete step_editor;
  37 }
  38
  39 void
  40 StepEditor::start_step_editing ()
  41 {
  42         _step_edit_triplet_countdown = 0;
  43         _step_edit_within_chord = 0;
  44         _step_edit_chord_duration = 0.0;
  45         step_edit_region.reset ();
  46         step_edit_region_view = 0;
  47         last_added_pitch = -1;
  48         last_added_end = 0;
  49
  50         resync_step_edit_position ();
  51         prepare_step_edit_region ();
  52         reset_step_edit_beat_pos ();
  53
  54         assert (step_edit_region);
  55         assert (step_edit_region_view);
  56
  57         if (step_editor == 0) {
  58                 step_editor = new StepEntry (*this);
  59                 step_editor->signal_delete_event().connect (sigc::mem_fun (*this, &StepEditor::step_editor_hidden));
  60                 step_editor->signal_hide().connect (sigc::mem_fun (*this, &StepEditor::step_editor_hide));
  61         }
  62
  63         step_edit_region_view->show_step_edit_cursor (step_edit_beat_pos);
  64         step_edit_region_view->set_step_edit_cursor_width (step_editor->note_length());
  65
  66         step_editor->set_position (WIN_POS_MOUSE);
  67         step_editor->present ();
  68 }
  69
  70 void
  71 StepEditor::resync_step_edit_position ()
  72 {
  73         step_edit_insert_position = _editor.get_preferred_edit_position ();
  74 }
  75
  76 void
  77 StepEditor::resync_step_edit_to_edit_point ()
  78 {
  79         resync_step_edit_position ();
  80         if (step_edit_region) {
  81                 reset_step_edit_beat_pos ();
  82         }
  83 }
  84
  85 void
  86 StepEditor::prepare_step_edit_region ()
  87 {
  88         boost::shared_ptr<Region> r = _track->playlist()->top_region_at (step_edit_insert_position);
  89
  90         if (r) {
  91                 step_edit_region = boost::dynamic_pointer_cast<MidiRegion>(r);
  92         }
  93
  94         if (step_edit_region) {
  95                 RegionView* rv = _mtv.midi_view()->find_view (step_edit_region);
  96                 step_edit_region_view = dynamic_cast<MidiRegionView*> (rv);
  97
  98         } else {
  99
 100                 const Meter& m = _mtv.session()->tempo_map().meter_at (step_edit_insert_position);
 101                 const Tempo& t = _mtv.session()->tempo_map().tempo_at (step_edit_insert_position);
 102
 103                 step_edit_region = _mtv.add_region (step_edit_insert_position, floor (m.frames_per_bar (t, _mtv.session()->frame_rate())), true);
 104
 105                 RegionView* rv = _mtv.midi_view()->find_view (step_edit_region);
 106                 step_edit_region_view = dynamic_cast<MidiRegionView*>(rv);
 107         }
 108 }
 109
 110
 111 void
 112 StepEditor::reset_step_edit_beat_pos ()
 113 {
 114         assert (step_edit_region);
 115         assert (step_edit_region_view);
 116
 117         framecnt_t frames_from_start = _editor.get_preferred_edit_position() - step_edit_region->position();
 118
 119         if (frames_from_start < 0) {
 120                 /* this can happen with snap enabled, and the edit point == Playhead. we snap the
 121                    position of the new region, and it can end up after the edit point.
 122                 */
 123                 frames_from_start = 0;
 124         }
 125
 126         step_edit_beat_pos = step_edit_region_view->frames_to_beats (frames_from_start);
 127         step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
 128 }
 129
 130 bool
 131 StepEditor::step_editor_hidden (GdkEventAny*)
 132 {
 133         step_editor_hide ();
 134         return true;
 135 }
 136
 137 void
 138 StepEditor::step_editor_hide ()
 139 {
 140         /* everything else will follow the change in the model */
 141         _track->set_step_editing (false);
 142 }
 143
 144 void
 145 StepEditor::stop_step_editing ()
 146 {
 147         if (step_editor) {
 148                 step_editor->hide ();
 149         }
 150
 151         if (step_edit_region_view) {
 152                 step_edit_region_view->hide_step_edit_cursor();
 153         }
 154
 155         step_edit_region.reset ();
 156 }
 157
 158 void
 159 StepEditor::check_step_edit ()
 160 {
 161         MidiRingBuffer<framepos_t>& incoming (_track->step_edit_ring_buffer());
 162         uint8_t* buf;
 163         uint32_t bufsize = 32;
 164
 165         buf = new uint8_t[bufsize];
 166
 167         while (incoming.read_space()) {
 168                 framepos_t time;
 169                 Evoral::EventType type;
 170                 uint32_t size;
 171
 172                 incoming.read_prefix (&time, &type, &size);
 173
 174                 if (size > bufsize) {
 175                         delete [] buf;
 176                         bufsize = size;
 177                         buf = new uint8_t[bufsize];
 178                 }
 179
 180                 incoming.read_contents (size, buf);
 181
 182                 if ((buf[0] & 0xf0) == MIDI_CMD_NOTE_ON) {
 183                         step_add_note (buf[0] & 0xf, buf[1], buf[2], 0.0);
 184                 }
 185         }
 186 }
 187
 188 int
 189 StepEditor::step_add_bank_change (uint8_t /*channel*/, uint8_t /*bank*/)
 190 {
 191         return 0;
 192 }
 193
 194 int
 195 StepEditor::step_add_program_change (uint8_t /*channel*/, uint8_t /*program*/)
 196 {
 197         return 0;
 198 }
 199
 200 void
 201 StepEditor::step_edit_sustain (Evoral::MusicalTime beats)
 202 {
 203         if (step_edit_region_view) {
 204                 step_edit_region_view->step_sustain (beats);
 205         }
 206 }
 207
 208 void
 209 StepEditor::move_step_edit_beat_pos (Evoral::MusicalTime beats)
 210 {
 211         if (beats > 0.0) {
 212                 step_edit_beat_pos = min (step_edit_beat_pos + beats,
 213                                           step_edit_region_view->frames_to_beats (step_edit_region->length()));
 214         } else if (beats < 0.0) {
 215                 if (-beats < step_edit_beat_pos) {
 216                         step_edit_beat_pos += beats; // its negative, remember
 217                 } else {
 218                         step_edit_beat_pos = 0;
 219                 }
 220         }
 221         step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
 222 }
 223
 224 int
 225 StepEditor::step_add_note (uint8_t channel, uint8_t pitch, uint8_t velocity, Evoral::MusicalTime beat_duration)
 226 {
 227         /* do these things in case undo removed the step edit region
 228         */
 229         if (!step_edit_region) {
 230                 resync_step_edit_position ();
 231                 prepare_step_edit_region ();
 232                 reset_step_edit_beat_pos ();
 233                 step_edit_region_view->show_step_edit_cursor (step_edit_beat_pos);
 234                 step_edit_region_view->set_step_edit_cursor_width (step_editor->note_length());
 235         }
 236
 237         assert (step_edit_region);
 238         assert (step_edit_region_view);
 239
 240         if (beat_duration == 0.0) {
 241                 bool success;
 242                 beat_duration = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
 243
 244                 if (!success) {
 245                         return -1;
 246                 }
 247         }
 248
 249         MidiStreamView* msv = _mtv.midi_view();
 250
 251         /* make sure its visible on the vertical axis */
 252
 253         if (pitch < msv->lowest_note() || pitch > msv->highest_note()) {
 254                 msv->update_note_range (pitch);
 255                 msv->set_note_range (MidiStreamView::ContentsRange);
 256         }
 257
 258         /* make sure its visible on the horizontal axis */
 259
 260         framepos_t fpos = step_edit_region->position() +
 261                 step_edit_region_view->beats_to_frames (step_edit_beat_pos + beat_duration);
 262
 263         if (fpos >= (_editor.leftmost_position() + _editor.current_page_frames())) {
 264                 _editor.reset_x_origin (fpos - (_editor.current_page_frames()/4));
 265         }
 266
 267         Evoral::MusicalTime at = step_edit_beat_pos;
 268         Evoral::MusicalTime len = beat_duration;
 269
 270         if ((last_added_pitch >= 0) && (pitch == last_added_pitch) && (last_added_end == step_edit_beat_pos)) {
 271
 272                 /* avoid any apparent note overlap - move the start of this note
 273                    up by 1 tick from where the last note ended
 274                 */
 275
 276                 at += 1.0/Timecode::BBT_Time::ticks_per_beat;
 277                 len -= 1.0/Timecode::BBT_Time::ticks_per_beat;
 278         }
 279
 280         step_edit_region_view->step_add_note (channel, pitch, velocity, at, len);
 281
 282         last_added_pitch = pitch;
 283         last_added_end = at+len;
 284
 285         if (_step_edit_triplet_countdown > 0) {
 286                 _step_edit_triplet_countdown--;
 287
 288                 if (_step_edit_triplet_countdown == 0) {
 289                         _step_edit_triplet_countdown = 3;
 290                 }
 291         }
 292
 293         if (!_step_edit_within_chord) {
 294                 step_edit_beat_pos += beat_duration;
 295                 step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
 296         } else {
 297                 step_edit_beat_pos += 1.0/Timecode::BBT_Time::ticks_per_beat; // tiny, but no longer overlapping
 298                 _step_edit_chord_duration = max (_step_edit_chord_duration, beat_duration);
 299         }
 300
 301         return 0;
 302 }
 303
 304 void
 305 StepEditor::set_step_edit_cursor_width (Evoral::MusicalTime beats)
 306 {
 307         if (step_edit_region_view) {
 308                 step_edit_region_view->set_step_edit_cursor_width (beats);
 309         }
 310 }
 311
 312 bool
 313 StepEditor::step_edit_within_triplet() const
 314 {
 315         return _step_edit_triplet_countdown > 0;
 316 }
 317
 318 bool
 319 StepEditor::step_edit_within_chord() const
 320 {
 321         return _step_edit_within_chord;
 322 }
 323
 324 void
 325 StepEditor::step_edit_toggle_triplet ()
 326 {
 327         if (_step_edit_triplet_countdown == 0) {
 328                 _step_edit_within_chord = false;
 329                 _step_edit_triplet_countdown = 3;
 330         } else {
 331                 _step_edit_triplet_countdown = 0;
 332         }
 333 }
 334
 335 void
 336 StepEditor::step_edit_toggle_chord ()
 337 {
 338         if (_step_edit_within_chord) {
 339                 _step_edit_within_chord = false;
 340                 step_edit_beat_pos += _step_edit_chord_duration;
 341                 step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
 342         } else {
 343                 _step_edit_triplet_countdown = 0;
 344                 _step_edit_within_chord = true;
 345         }
 346 }
 347
 348 void
 349 StepEditor::step_edit_rest (Evoral::MusicalTime beats)
 350 {
 351         bool success;
 352
 353         if (beats == 0.0) {
 354                 beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
 355         } else {
 356                 success = true;
 357         }
 358
 359         if (success) {
 360                 step_edit_beat_pos += beats;
 361                 step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
 362         }
 363 }
 364
 365 void
 366 StepEditor::step_edit_beat_sync ()
 367 {
 368         step_edit_beat_pos = ceil (step_edit_beat_pos);
 369         step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
 370 }
 371
 372 void
 373 StepEditor::step_edit_bar_sync ()
 374 {
 375         Session* _session = _mtv.session ();
 376
 377         if (!_session || !step_edit_region_view || !step_edit_region) {
 378                 return;
 379         }
 380
 381         framepos_t fpos = step_edit_region->position() +
 382                 step_edit_region_view->beats_to_frames (step_edit_beat_pos);
 383         fpos = _session->tempo_map().round_to_bar (fpos, 1);
 384         step_edit_beat_pos = ceil (step_edit_region_view->frames_to_beats (fpos - step_edit_region->position()));
 385         step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
 386 }
 387
 388 void
 389 StepEditor::playlist_changed ()
 390 {
 391         step_edit_region_connection.disconnect ();
 392         _track->playlist()->RegionRemoved.connect (step_edit_region_connection, invalidator (*this),
 393                                                    ui_bind (&StepEditor::region_removed, this, _1),
 394                                                    gui_context());
 395 }
 396
 397 void
 398 StepEditor::region_removed (boost::weak_ptr<Region> wr)
 399 {
 400         boost::shared_ptr<Region> r (wr.lock());
 401
 402         if (!r) {
 403                 return;
 404         }
 405
 406         if (step_edit_region == r) {
 407                 step_edit_region.reset();
 408                 step_edit_region_view = 0;
 409                 // force a recompute of the insert position
 410                 step_edit_beat_pos = -1.0;
 411         }
 412 }
 413
 414 string
 415 StepEditor::name() const
 416 {
 417         return _track->name();
 418 }