gtk2_ardour/audio_streamview.cc

   1 /*
   2     Copyright (C) 2001, 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 <cmath>
  20 #include <cassert>
  21
  22 #include <gtkmm.h>
  23
  24 #include <gtkmm2ext/gtk_ui.h>
  25
  26 #include <ardour/audioplaylist.h>
  27 #include <ardour/audioregion.h>
  28 #include <ardour/audiofilesource.h>
  29 #include <ardour/audio_diskstream.h>
  30 #include <ardour/audio_track.h>
  31 #include <ardour/playlist_templates.h>
  32 #include <ardour/source.h>
  33 #include <ardour/region_factory.h>
  34
  35 #include "audio_streamview.h"
  36 #include "audio_region_view.h"
  37 #include "tape_region_view.h"
  38 #include "audio_time_axis.h"
  39 #include "canvas-waveview.h"
  40 #include "canvas-simplerect.h"
  41 #include "region_selection.h"
  42 #include "selection.h"
  43 #include "public_editor.h"
  44 #include "ardour_ui.h"
  45 #include "crossfade_view.h"
  46 #include "rgb_macros.h"
  47 #include "gui_thread.h"
  48 #include "utils.h"
  49 #include "color.h"
  50
  51 using namespace ARDOUR;
  52 using namespace PBD;
  53 using namespace Editing;
  54
  55 AudioStreamView::AudioStreamView (AudioTimeAxisView& tv)
  56         : StreamView (tv)
  57 {
  58         crossfades_visible = true;
  59
  60         if (tv.is_track())
  61                 stream_base_color = color_map[cAudioTrackBase];
  62         else
  63                 stream_base_color = color_map[cAudioBusBase];
  64
  65         canvas_rect->property_fill_color_rgba() = stream_base_color;
  66         canvas_rect->property_outline_color_rgba() = color_map[cAudioTrackOutline];
  67
  68         _amplitude_above_axis = 1.0;
  69
  70         use_rec_regions = tv.editor.show_waveforms_recording ();
  71
  72 }
  73
  74 AudioStreamView::~AudioStreamView ()
  75 {
  76 }
  77
  78 int
  79 AudioStreamView::set_height (gdouble h)
  80 {
  81         /* limit the values to something sane-ish */
  82         if (h < 10.0 || h > 1000.0) {
  83                 return -1;
  84         }
  85
  86         StreamView::set_height(h);
  87
  88         for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
  89                 (*i)->set_height (h);
  90         }
  91
  92         return 0;
  93 }
  94
  95 int
  96 AudioStreamView::set_samples_per_unit (gdouble spp)
  97 {
  98         StreamView::set_samples_per_unit(spp);
  99
 100         for (CrossfadeViewList::iterator xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
 101                 (*xi)->set_samples_per_unit (spp);
 102         }
 103
 104         return 0;
 105 }
 106
 107 int
 108 AudioStreamView::set_amplitude_above_axis (gdouble app)
 109 {
 110         RegionViewList::iterator i;
 111
 112         if (app < 1.0) {
 113                 return -1;
 114         }
 115
 116         _amplitude_above_axis = app;
 117
 118         for (i = region_views.begin(); i != region_views.end(); ++i) {
 119                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 120                 if (arv)
 121                         arv->set_amplitude_above_axis (app);
 122         }
 123
 124         return 0;
 125 }
 126
 127 void
 128 AudioStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wait_for_waves)
 129 {
 130         AudioRegionView *region_view;
 131
 132         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_region_view), r));
 133
 134         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (r);
 135
 136         if (region == 0) {
 137                 return;
 138         }
 139
 140         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 141                 if ((*i)->region() == r) {
 142
 143                         /* great. we already have a AudioRegionView for this Region. use it again. */
 144
 145                         (*i)->set_valid (true);
 146                         return;
 147                 }
 148         }
 149
 150         switch (_trackview.audio_track()->mode()) {
 151         case Normal:
 152                 region_view = new AudioRegionView (canvas_group, _trackview, region,
 153                                                    _samples_per_unit, region_color);
 154                 break;
 155         case Destructive:
 156                 region_view = new TapeAudioRegionView (canvas_group, _trackview, region,
 157                                                        _samples_per_unit, region_color);
 158                 break;
 159         }
 160
 161         region_view->init (region_color, wait_for_waves);
 162         region_view->set_amplitude_above_axis(_amplitude_above_axis);
 163         region_views.push_front (region_view);
 164
 165         /* follow global waveform setting */
 166
 167         region_view->set_waveform_visible(_trackview.editor.show_waveforms());
 168
 169         /* catch regionview going away */
 170         region->GoingAway.connect (bind (mem_fun (*this, &AudioStreamView::remove_region_view), boost::weak_ptr<Region> (r)));
 171
 172         RegionViewAdded (region_view);
 173 }
 174
 175 void
 176 AudioStreamView::remove_region_view (boost::weak_ptr<Region> weak_r)
 177 {
 178         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_region_view), weak_r));
 179
 180         boost::shared_ptr<Region> r (weak_r.lock());
 181
 182         if (!r) {
 183                 return;
 184         }
 185
 186         if (!_trackview.session().deletion_in_progress()) {
 187
 188                 for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end();) {
 189                         list<CrossfadeView*>::iterator tmp;
 190
 191                         tmp = i;
 192                         ++tmp;
 193
 194                         boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(r);
 195                         if (ar && (*i)->crossfade.involves (ar)) {
 196                                 delete *i;
 197                                 crossfade_views.erase (i);
 198                         }
 199
 200                         i = tmp;
 201                 }
 202         }
 203
 204         StreamView::remove_region_view(r);
 205 }
 206
 207 void
 208 AudioStreamView::undisplay_diskstream ()
 209 {
 210         StreamView::undisplay_diskstream();
 211
 212         for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 213                 delete *i;
 214         }
 215
 216         crossfade_views.clear ();
 217 }
 218
 219 void
 220 AudioStreamView::playlist_modified ()
 221 {
 222         ENSURE_GUI_THREAD (mem_fun (*this, &AudioStreamView::playlist_modified));
 223
 224         StreamView::playlist_modified();
 225
 226         /* make sure xfades are on top and all the regionviews are stacked correctly. */
 227
 228         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 229                 (*i)->get_canvas_group()->raise_to_top();
 230         }
 231 }
 232
 233 void
 234 AudioStreamView::playlist_changed (boost::shared_ptr<Diskstream> ds)
 235 {
 236         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::playlist_changed), ds));
 237
 238         StreamView::playlist_changed(ds);
 239
 240         AudioPlaylist* apl = dynamic_cast<AudioPlaylist*>(ds->playlist());
 241         if (apl)
 242                 playlist_connections.push_back (apl->NewCrossfade.connect (mem_fun (*this, &AudioStreamView::add_crossfade)));
 243 }
 244
 245 void
 246 AudioStreamView::add_crossfade (Crossfade *crossfade)
 247 {
 248         AudioRegionView* lview = 0;
 249         AudioRegionView* rview = 0;
 250
 251         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_crossfade), crossfade));
 252
 253         /* first see if we already have a CrossfadeView for this Crossfade */
 254
 255         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 256                 if (&(*i)->crossfade == crossfade) {
 257                         if (!crossfades_visible) {
 258                                 (*i)->hide();
 259                         } else {
 260                                 (*i)->show ();
 261                         }
 262                         (*i)->set_valid (true);
 263                         return;
 264                 }
 265         }
 266
 267         /* create a new one */
 268
 269         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 270                 AudioRegionView* arv = dynamic_cast<AudioRegionView*>(*i);
 271
 272                 if (!lview && arv && (arv->region() == crossfade->out())) {
 273                         lview = arv;
 274                 }
 275                 if (!rview && arv && (arv->region() == crossfade->in())) {
 276                         rview = arv;
 277                 }
 278         }
 279
 280         CrossfadeView *cv = new CrossfadeView (_trackview.canvas_display,
 281                                                _trackview,
 282                                                *crossfade,
 283                                                _samples_per_unit,
 284                                                region_color,
 285                                                *lview, *rview);
 286
 287         crossfade->Invalidated.connect (mem_fun (*this, &AudioStreamView::remove_crossfade));
 288         crossfade_views.push_back (cv);
 289
 290         if (!crossfades_visible) {
 291                 cv->hide ();
 292         }
 293 }
 294
 295 void
 296 AudioStreamView::remove_crossfade (Crossfade *xfade)
 297 {
 298         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_crossfade), xfade));
 299
 300         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 301                 if (&(*i)->crossfade == xfade) {
 302                         delete *i;
 303                         crossfade_views.erase (i);
 304                         break;
 305                 }
 306         }
 307 }
 308
 309 void
 310 AudioStreamView::redisplay_diskstream ()
 311 {
 312         list<RegionView *>::iterator i, tmp;
 313         list<CrossfadeView*>::iterator xi, tmpx;
 314
 315
 316         for (i = region_views.begin(); i != region_views.end(); ++i) {
 317                 (*i)->set_valid (false);
 318         }
 319
 320         for (xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
 321                 (*xi)->set_valid (false);
 322                 if ((*xi)->visible()) {
 323                         (*xi)->show ();
 324                 }
 325         }
 326
 327         if (_trackview.is_audio_track()) {
 328                 _trackview.get_diskstream()->playlist()->foreach_region (static_cast<StreamView*>(this), &StreamView::add_region_view);
 329                 AudioPlaylist* apl = dynamic_cast<AudioPlaylist*>(_trackview.get_diskstream()->playlist());
 330                 if (apl)
 331                         apl->foreach_crossfade (this, &AudioStreamView::add_crossfade);
 332         }
 333
 334         for (i = region_views.begin(); i != region_views.end(); ) {
 335                 tmp = i;
 336                 tmp++;
 337
 338                 if (!(*i)->is_valid()) {
 339                         delete *i;
 340                         region_views.erase (i);
 341                 }
 342
 343                 i = tmp;
 344         }
 345
 346         for (xi = crossfade_views.begin(); xi != crossfade_views.end();) {
 347                 tmpx = xi;
 348                 tmpx++;
 349
 350                 if (!(*xi)->valid()) {
 351                         delete *xi;
 352                         crossfade_views.erase (xi);
 353                 }
 354
 355                 xi = tmpx;
 356         }
 357
 358         /* now fix layering */
 359
 360         playlist_modified ();
 361 }
 362
 363 void
 364 AudioStreamView::set_show_waveforms (bool yn)
 365 {
 366         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 367                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 368                 if (arv)
 369                         arv->set_waveform_visible (yn);
 370         }
 371 }
 372
 373 void
 374 AudioStreamView::set_waveform_shape (WaveformShape shape)
 375 {
 376         for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 377                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 378                 if (arv)
 379                         arv->set_waveform_shape (shape);
 380         }
 381 }
 382
 383 void
 384 AudioStreamView::setup_rec_box ()
 385 {
 386         // cerr << _trackview.name() << " streamview SRB\n";
 387
 388         if (_trackview.session().transport_rolling()) {
 389
 390                 // cerr << "\trolling\n";
 391
 392                 if (!rec_active &&
 393                     _trackview.session().record_status() == Session::Recording &&
 394                     _trackview.get_diskstream()->record_enabled()) {
 395
 396                         if (_trackview.audio_track()->mode() == Normal && use_rec_regions && rec_regions.size() == rec_rects.size()) {
 397
 398                                 /* add a new region, but don't bother if they set use_rec_regions mid-record */
 399
 400                                 SourceList sources;
 401
 402                                 for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 403                                         (*prc).disconnect();
 404                                 }
 405                                 rec_data_ready_connections.clear();
 406
 407                                 // FIXME
 408                                 boost::shared_ptr<AudioDiskstream> ads = boost::dynamic_pointer_cast<AudioDiskstream>(_trackview.get_diskstream());
 409                                 assert(ads);
 410
 411                                 for (uint32_t n=0; n < ads->n_channels().get(DataType::AUDIO); ++n) {
 412                                         boost::shared_ptr<AudioFileSource> src = boost::static_pointer_cast<AudioFileSource> (ads->write_source (n));
 413                                         if (src) {
 414                                                 sources.push_back (src);
 415
 416                                                 rec_data_ready_connections.push_back (src->PeakRangeReady.connect (bind
 417                                                         (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), boost::weak_ptr<Source>(src))));
 418                                         }
 419                                 }
 420
 421                                 // handle multi
 422
 423                                 nframes_t start = 0;
 424                                 if (rec_regions.size() > 0) {
 425                                         start = rec_regions.back()->start() + _trackview.get_diskstream()->get_captured_frames(rec_regions.size()-1);
 426                                 }
 427
 428                                 boost::shared_ptr<AudioRegion> region (boost::dynamic_pointer_cast<AudioRegion>
 429                                                                        (RegionFactory::create (sources, start, 1 , "", 0, (Region::Flag)(Region::DefaultFlags | Region::DoNotSaveState), false)));
 430                                 assert(region);
 431                                 region->set_position (_trackview.session().transport_frame(), this);
 432
 433                                 rec_regions.push_back (region);
 434                         }
 435
 436                         /* start a new rec box */
 437
 438                         AudioTrack* at;
 439
 440                         at = _trackview.audio_track(); /* we know what it is already */
 441                         boost::shared_ptr<AudioDiskstream> ds = at->audio_diskstream();
 442                         nframes_t frame_pos = ds->current_capture_start ();
 443                         gdouble xstart = _trackview.editor.frame_to_pixel (frame_pos);
 444                         gdouble xend;
 445                         uint32_t fill_color;
 446
 447                         switch (_trackview.audio_track()->mode()) {
 448                         case Normal:
 449                                 xend = xstart;
 450                                 fill_color = color_map[cRecordingRectFill];
 451                                 break;
 452
 453                         case Destructive:
 454                                 xend = xstart + 2;
 455                                 fill_color = color_map[cRecordingRectFill];
 456                                 /* make the recording rect translucent to allow
 457                                    the user to see the peak data coming in, etc.
 458                                 */
 459                                 fill_color = UINT_RGBA_CHANGE_A (fill_color, 120);
 460                                 break;
 461                         }
 462
 463                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*canvas_group);
 464                         rec_rect->property_x1() = xstart;
 465                         rec_rect->property_y1() = 1.0;
 466                         rec_rect->property_x2() = xend;
 467                         rec_rect->property_y2() = (double) _trackview.height - 1;
 468                         rec_rect->property_outline_color_rgba() = color_map[cRecordingRectOutline];
 469                         rec_rect->property_fill_color_rgba() = fill_color;
 470
 471                         RecBoxInfo recbox;
 472                         recbox.rectangle = rec_rect;
 473                         recbox.start = _trackview.session().transport_frame();
 474                         recbox.length = 0;
 475
 476                         rec_rects.push_back (recbox);
 477
 478                         screen_update_connection.disconnect();
 479                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun (*this, &AudioStreamView::update_rec_box));
 480                         rec_updating = true;
 481                         rec_active = true;
 482
 483                 } else if (rec_active &&
 484                            (_trackview.session().record_status() != Session::Recording ||
 485                             !_trackview.get_diskstream()->record_enabled())) {
 486
 487                         screen_update_connection.disconnect();
 488                         rec_active = false;
 489                         rec_updating = false;
 490
 491                 }
 492
 493         } else {
 494
 495                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 496
 497                 if (!rec_rects.empty() || !rec_regions.empty()) {
 498
 499                         /* disconnect rapid update */
 500                         screen_update_connection.disconnect();
 501
 502                         for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 503                                 (*prc).disconnect();
 504                         }
 505                         rec_data_ready_connections.clear();
 506
 507                         rec_updating = false;
 508                         rec_active = false;
 509                         last_rec_data_frame = 0;
 510
 511                         /* remove temp regions */
 512
 513                         for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); ) {
 514                                 list<boost::shared_ptr<Region> >::iterator tmp;
 515
 516                                 tmp = iter;
 517                                 ++tmp;
 518
 519                                 (*iter)->drop_references ();
 520
 521                                 iter = tmp;
 522                         }
 523
 524                         rec_regions.clear();
 525
 526                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 527
 528                         /* transport stopped, clear boxes */
 529                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 530                                 RecBoxInfo &rect = (*iter);
 531                                 delete rect.rectangle;
 532                         }
 533
 534                         rec_rects.clear();
 535
 536                 }
 537         }
 538 }
 539
 540 void
 541 AudioStreamView::foreach_crossfadeview (void (CrossfadeView::*pmf)(void))
 542 {
 543         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 544                 ((*i)->*pmf) ();
 545         }
 546 }
 547
 548 void
 549 AudioStreamView::rec_peak_range_ready (nframes_t start, nframes_t cnt, boost::weak_ptr<Source> weak_src)
 550 {
 551         ENSURE_GUI_THREAD(bind (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), start, cnt, weak_src));
 552
 553         boost::shared_ptr<Source> src (weak_src.lock());
 554
 555         if (!src) {
 556                 return;
 557         }
 558
 559         // this is called from the peak building thread
 560
 561         if (rec_data_ready_map.size() == 0 || start+cnt > last_rec_data_frame) {
 562                 last_rec_data_frame = start + cnt;
 563         }
 564
 565         rec_data_ready_map[src] = true;
 566
 567         if (rec_data_ready_map.size() == _trackview.get_diskstream()->n_channels().get(DataType::AUDIO)) {
 568                 this->update_rec_regions ();
 569                 rec_data_ready_map.clear();
 570         }
 571 }
 572
 573 void
 574 AudioStreamView::update_rec_regions ()
 575 {
 576         if (use_rec_regions) {
 577
 578                 uint32_t n = 0;
 579
 580                 for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); n++) {
 581
 582                         list<boost::shared_ptr<Region> >::iterator tmp;
 583
 584                         tmp = iter;
 585                         ++tmp;
 586
 587                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 588                                 /* rect already hidden, this region is done */
 589                                 iter = tmp;
 590                                 continue;
 591                         }
 592
 593                         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion>(*iter);
 594                         if (!region) {
 595                                 continue;
 596                         }
 597
 598                         nframes_t origlen = region->length();
 599
 600                         if (region == rec_regions.back() && rec_active) {
 601
 602                                 if (last_rec_data_frame > region->start()) {
 603
 604                                         nframes_t nlen = last_rec_data_frame - region->start();
 605
 606                                         if (nlen != region->length()) {
 607
 608                                                 region->freeze ();
 609                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 610                                                 region->set_length (nlen, this);
 611                                                 region->thaw ("updated");
 612
 613                                                 if (origlen == 1) {
 614                                                         /* our special initial length */
 615                                                         add_region_view_internal (region, false);
 616                                                 }
 617
 618                                                 /* also update rect */
 619                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 620                                                 gdouble xend = _trackview.editor.frame_to_pixel (region->position() + region->length());
 621                                                 rect->property_x2() = xend;
 622                                         }
 623                                 }
 624
 625                         } else {
 626
 627                                 nframes_t nlen = _trackview.get_diskstream()->get_captured_frames(n);
 628
 629                                 if (nlen != region->length()) {
 630
 631                                         if (region->source(0)->length() >= region->start() + nlen) {
 632
 633                                                 region->freeze ();
 634                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 635                                                 region->set_length (nlen, this);
 636                                                 region->thaw ("updated");
 637
 638                                                 if (origlen == 1) {
 639                                                         /* our special initial length */
 640                                                         add_region_view_internal (region, false);
 641                                                 }
 642
 643                                                 /* also hide rect */
 644                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 645                                                 rect->hide();
 646
 647                                         }
 648                                 }
 649                         }
 650
 651                         iter = tmp;
 652                 }
 653         }
 654 }
 655
 656 void
 657 AudioStreamView::show_all_xfades ()
 658 {
 659         foreach_crossfadeview (&CrossfadeView::show);
 660         crossfades_visible = true;
 661 }
 662
 663 void
 664 AudioStreamView::hide_all_xfades ()
 665 {
 666         foreach_crossfadeview (&CrossfadeView::hide);
 667         crossfades_visible = false;
 668 }
 669
 670 void
 671 AudioStreamView::hide_xfades_involving (AudioRegionView& rv)
 672 {
 673         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 674                 if ((*i)->crossfade.involves (rv.audio_region())) {
 675                         (*i)->fake_hide ();
 676                 }
 677         }
 678 }
 679
 680 void
 681 AudioStreamView::reveal_xfades_involving (AudioRegionView& rv)
 682 {
 683         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 684                 if ((*i)->crossfade.involves (rv.audio_region()) && (*i)->visible()) {
 685                         (*i)->show ();
 686                 }
 687         }
 688 }
 689
 690 void
 691 AudioStreamView::color_handler (ColorID id, uint32_t val)
 692 {
 693         switch (id) {
 694         case cAudioTrackBase:
 695                 if (_trackview.is_track()) {
 696                         canvas_rect->property_fill_color_rgba() = val;
 697                 }
 698                 break;
 699         case cAudioBusBase:
 700                 if (!_trackview.is_track()) {
 701                         canvas_rect->property_fill_color_rgba() = val;
 702                 }
 703                 break;
 704         case cAudioTrackOutline:
 705                 canvas_rect->property_outline_color_rgba() = val;
 706                 break;
 707
 708         default:
 709                 break;
 710         }
 711 }
 712