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 #include "i18n.h"
  52
  53 using namespace ARDOUR;
  54 using namespace PBD;
  55 using namespace Editing;
  56
  57 AudioStreamView::AudioStreamView (AudioTimeAxisView& tv)
  58         : StreamView (tv)
  59 {
  60         crossfades_visible = true;
  61         _waveform_scale = LinearWaveform;
  62         _waveform_shape = Traditional;
  63
  64         if (tv.is_track())
  65                 stream_base_color = color_map[cAudioTrackBase];
  66         else
  67                 stream_base_color = color_map[cAudioBusBase];
  68
  69         canvas_rect->property_fill_color_rgba() = stream_base_color;
  70         canvas_rect->property_outline_color_rgba() = color_map[cAudioTrackOutline];
  71
  72         _amplitude_above_axis = 1.0;
  73
  74         use_rec_regions = tv.editor.show_waveforms_recording ();
  75
  76 }
  77
  78 AudioStreamView::~AudioStreamView ()
  79 {
  80 }
  81
  82 int
  83 AudioStreamView::set_samples_per_unit (gdouble spp)
  84 {
  85         StreamView::set_samples_per_unit(spp);
  86
  87         for (CrossfadeViewList::iterator xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
  88                 (*xi)->set_samples_per_unit (spp);
  89         }
  90
  91         return 0;
  92 }
  93
  94 int
  95 AudioStreamView::set_amplitude_above_axis (gdouble app)
  96 {
  97         RegionViewList::iterator i;
  98
  99         if (app < 1.0) {
 100                 return -1;
 101         }
 102
 103         _amplitude_above_axis = app;
 104
 105         for (i = region_views.begin(); i != region_views.end(); ++i) {
 106                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 107                 if (arv)
 108                         arv->set_amplitude_above_axis (app);
 109         }
 110
 111         return 0;
 112 }
 113
 114 void
 115 AudioStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wait_for_waves)
 116 {
 117         AudioRegionView *region_view = 0;
 118
 119         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_region_view), r));
 120
 121         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (r);
 122
 123         if (region == 0) {
 124                 return;
 125         }
 126
 127         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 128                 if ((*i)->region() == r) {
 129
 130                         /* great. we already have a AudioRegionView for this Region. use it again. */
 131
 132                         (*i)->set_valid (true);
 133
 134                         // this might not be necessary
 135                         AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 136                         if (arv) {
 137                                 arv->set_waveform_scale (_waveform_scale);
 138                                 arv->set_waveform_shape (_waveform_shape);
 139                         }
 140
 141                         return;
 142                 }
 143         }
 144
 145         switch (_trackview.audio_track()->mode()) {
 146         case Normal:
 147                 region_view = new AudioRegionView (canvas_group, _trackview, region,
 148                                                    _samples_per_unit, region_color);
 149                 break;
 150         case Destructive:
 151                 region_view = new TapeAudioRegionView (canvas_group, _trackview, region,
 152                                                        _samples_per_unit, region_color);
 153                 break;
 154         default:
 155                 fatal << string_compose (_("programming error: %1"), "illegal track mode in ::add_region_view_internal") << endmsg;
 156                 /*NOTREACHED*/
 157
 158         }
 159
 160         region_view->init (region_color, wait_for_waves);
 161         region_view->set_amplitude_above_axis(_amplitude_above_axis);
 162         region_views.push_front (region_view);
 163
 164
 165         /* if its the special single-sample length that we use for rec-regions, make it
 166            insensitive to events
 167         */
 168
 169         if (region->length() == 1) {
 170                 region_view->set_sensitive (false);
 171         }
 172
 173         /* if this was the first one, then lets query the waveform scale and shape.
 174            otherwise, we set it to the current value */
 175
 176         if (region_views.size() == 1) {
 177                 if (region_view->waveform_logscaled()) {
 178                         _waveform_scale = LogWaveform;
 179                 } else {
 180                         _waveform_scale = LinearWaveform;
 181                 }
 182
 183                 if (region_view->waveform_rectified()) {
 184                         _waveform_shape = Rectified;
 185                 } else {
 186                         _waveform_shape = Traditional;
 187                 }
 188         }
 189         else {
 190                 region_view->set_waveform_scale(_waveform_scale);
 191                 region_view->set_waveform_shape(_waveform_shape);
 192         }
 193
 194         /* follow global waveform setting */
 195
 196         region_view->set_waveform_visible(_trackview.editor.show_waveforms());
 197
 198         /* catch regionview going away */
 199         region->GoingAway.connect (bind (mem_fun (*this, &AudioStreamView::remove_region_view), boost::weak_ptr<Region> (r)));
 200
 201         RegionViewAdded (region_view);
 202 }
 203
 204 void
 205 AudioStreamView::remove_region_view (boost::weak_ptr<Region> weak_r)
 206 {
 207         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_region_view), weak_r));
 208
 209         boost::shared_ptr<Region> r (weak_r.lock());
 210
 211         if (!r) {
 212                 return;
 213         }
 214
 215         if (!_trackview.session().deletion_in_progress()) {
 216
 217                 for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end();) {
 218                         list<CrossfadeView*>::iterator tmp;
 219
 220                         tmp = i;
 221                         ++tmp;
 222
 223                         boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(r);
 224                         if (ar && (*i)->crossfade->involves (ar)) {
 225                                 delete *i;
 226                                 crossfade_views.erase (i);
 227                         }
 228
 229                         i = tmp;
 230                 }
 231         }
 232
 233         StreamView::remove_region_view(r);
 234 }
 235
 236 void
 237 AudioStreamView::undisplay_diskstream ()
 238 {
 239         StreamView::undisplay_diskstream();
 240
 241         for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 242                 delete *i;
 243         }
 244
 245         crossfade_views.clear ();
 246 }
 247
 248 void
 249 AudioStreamView::playlist_modified_weak (boost::weak_ptr<Diskstream> ds)
 250 {
 251         boost::shared_ptr<Diskstream> sp (ds.lock());
 252         if (!sp) {
 253                 return;
 254         }
 255
 256         playlist_modified (sp);
 257 }
 258
 259 void
 260 AudioStreamView::playlist_modified (boost::shared_ptr<Diskstream> ds)
 261 {
 262         /* we do not allow shared_ptr<T> to be bound to slots */
 263         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::playlist_modified_weak), ds));
 264
 265         StreamView::playlist_modified (ds);
 266
 267         /* make sure xfades are on top and all the regionviews are stacked correctly. */
 268
 269         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 270                 (*i)->get_canvas_group()->raise_to_top();
 271         }
 272 }
 273
 274 void
 275 AudioStreamView::playlist_changed (boost::shared_ptr<Diskstream> ds)
 276 {
 277         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::playlist_changed), ds));
 278
 279         StreamView::playlist_changed(ds);
 280
 281         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(ds->playlist());
 282         if (apl)
 283                 playlist_connections.push_back (apl->NewCrossfade.connect (mem_fun (*this, &AudioStreamView::add_crossfade)));
 284 }
 285
 286 void
 287 AudioStreamView::add_crossfade_weak (boost::weak_ptr<Crossfade> crossfade)
 288 {
 289         boost::shared_ptr<Crossfade> sp (crossfade.lock());
 290
 291         if (!sp) {
 292                 return;
 293         }
 294
 295         add_crossfade (sp);
 296 }
 297
 298 void
 299 AudioStreamView::add_crossfade (boost::shared_ptr<Crossfade> crossfade)
 300 {
 301         AudioRegionView* lview = 0;
 302         AudioRegionView* rview = 0;
 303
 304         /* we do not allow shared_ptr<T> to be bound to slots */
 305
 306         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_crossfade_weak), boost::weak_ptr<Crossfade> (crossfade)));
 307
 308         /* first see if we already have a CrossfadeView for this Crossfade */
 309
 310         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 311                 if ((*i)->crossfade == crossfade) {
 312                         if (!crossfades_visible || layer_display == Stacked) {
 313                                 (*i)->hide();
 314                         } else {
 315                                 (*i)->show ();
 316                         }
 317                         (*i)->set_valid (true);
 318                         return;
 319                 }
 320         }
 321
 322         /* create a new one */
 323
 324         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 325                 AudioRegionView* arv = dynamic_cast<AudioRegionView*>(*i);
 326
 327                 if (!lview && arv && (arv->region() == crossfade->out())) {
 328                         lview = arv;
 329                 }
 330                 if (!rview && arv && (arv->region() == crossfade->in())) {
 331                         rview = arv;
 332                 }
 333         }
 334
 335         CrossfadeView *cv = new CrossfadeView (_trackview.canvas_display,
 336                                                _trackview,
 337                                                 crossfade,
 338                                                _samples_per_unit,
 339                                                region_color,
 340                                                *lview, *rview);
 341
 342         crossfade->Invalidated.connect (mem_fun (*this, &AudioStreamView::remove_crossfade));
 343         crossfade_views.push_back (cv);
 344
 345         if (!Config->get_xfades_visible() || !crossfades_visible || layer_display == Stacked) {
 346                 cv->hide ();
 347         }
 348 }
 349
 350 void
 351 AudioStreamView::remove_crossfade (boost::shared_ptr<Crossfade> xfade)
 352 {
 353         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_crossfade), xfade));
 354
 355         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 356                 if ((*i)->crossfade == xfade) {
 357                         delete *i;
 358                         crossfade_views.erase (i);
 359                         break;
 360                 }
 361         }
 362 }
 363
 364 void
 365 AudioStreamView::redisplay_diskstream ()
 366 {
 367         list<RegionView *>::iterator i, tmp;
 368         list<CrossfadeView*>::iterator xi, tmpx;
 369
 370         for (i = region_views.begin(); i != region_views.end(); ++i) {
 371                 (*i)->set_valid (false);
 372         }
 373
 374         for (xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
 375                 (*xi)->set_valid (false);
 376                 if ((*xi)->visible() && layer_display != Stacked) {
 377                         (*xi)->show ();
 378                 }
 379         }
 380
 381         if (_trackview.is_audio_track()) {
 382                 _trackview.get_diskstream()->playlist()->foreach_region (static_cast<StreamView*>(this), &StreamView::add_region_view);
 383
 384                 boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(_trackview.get_diskstream()->playlist());
 385                 if (apl)
 386                         apl->foreach_crossfade (this, &AudioStreamView::add_crossfade);
 387         }
 388
 389         for (i = region_views.begin(); i != region_views.end(); ) {
 390                 tmp = i;
 391                 tmp++;
 392
 393                 if (!(*i)->is_valid()) {
 394                         delete *i;
 395                         region_views.erase (i);
 396                 }
 397
 398                 i = tmp;
 399         }
 400
 401         for (xi = crossfade_views.begin(); xi != crossfade_views.end();) {
 402                 tmpx = xi;
 403                 tmpx++;
 404
 405                 if (!(*xi)->valid()) {
 406                         delete *xi;
 407                         crossfade_views.erase (xi);
 408                 }
 409
 410                 xi = tmpx;
 411         }
 412
 413         /* now fix layering */
 414
 415         for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 416                 region_layered (*i);
 417         }
 418 }
 419
 420 void
 421 AudioStreamView::set_show_waveforms (bool yn)
 422 {
 423         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 424                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 425                 if (arv)
 426                         arv->set_waveform_visible (yn);
 427         }
 428 }
 429
 430 void
 431 AudioStreamView::set_waveform_shape (WaveformShape shape)
 432 {
 433         for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 434                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 435                 if (arv)
 436                         arv->set_waveform_shape (shape);
 437         }
 438         _waveform_shape = shape;
 439 }
 440
 441 void
 442 AudioStreamView::set_waveform_scale (WaveformScale scale)
 443 {
 444         for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 445                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 446                 if (arv)
 447                         arv->set_waveform_scale (scale);
 448         }
 449         _waveform_scale = scale;
 450 }
 451
 452 void
 453 AudioStreamView::setup_rec_box ()
 454 {
 455         // cerr << _trackview.name() << " streamview SRB\n";
 456
 457         if (_trackview.session().transport_rolling()) {
 458
 459                 // cerr << "\trolling\n";
 460
 461                 if (!rec_active &&
 462                     _trackview.session().record_status() == Session::Recording &&
 463                     _trackview.get_diskstream()->record_enabled()) {
 464
 465                         if (_trackview.audio_track()->mode() == Normal && use_rec_regions && rec_regions.size() == rec_rects.size()) {
 466
 467                                 /* add a new region, but don't bother if they set use_rec_regions mid-record */
 468
 469                                 SourceList sources;
 470
 471                                 for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 472                                         (*prc).disconnect();
 473                                 }
 474                                 rec_data_ready_connections.clear();
 475
 476                                 // FIXME
 477                                 boost::shared_ptr<AudioDiskstream> ads = boost::dynamic_pointer_cast<AudioDiskstream>(_trackview.get_diskstream());
 478                                 assert(ads);
 479
 480                                 for (uint32_t n=0; n < ads->n_channels().n_audio(); ++n) {
 481                                         boost::shared_ptr<AudioFileSource> src = boost::static_pointer_cast<AudioFileSource> (ads->write_source (n));
 482                                         if (src) {
 483                                                 sources.push_back (src);
 484
 485                                                 rec_data_ready_connections.push_back (src->PeakRangeReady.connect (bind
 486                                                         (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), boost::weak_ptr<Source>(src))));
 487                                         }
 488                                 }
 489
 490                                 // handle multi
 491
 492                                 nframes_t start = 0;
 493                                 if (rec_regions.size() > 0) {
 494                                         start = rec_regions.back()->start() + _trackview.get_diskstream()->get_captured_frames(rec_regions.size()-1);
 495                                 }
 496
 497                                 boost::shared_ptr<AudioRegion> region (boost::dynamic_pointer_cast<AudioRegion>
 498                                                                        (RegionFactory::create (sources, start, 1 , "", 0, (Region::Flag)(Region::DefaultFlags | Region::DoNotSaveState), false)));
 499                                 assert(region);
 500                                 region->set_position (_trackview.session().transport_frame(), this);
 501
 502                                 rec_regions.push_back (region);
 503                         }
 504
 505                         /* start a new rec box */
 506
 507                         AudioTrack* at;
 508
 509                         at = _trackview.audio_track(); /* we know what it is already */
 510                         boost::shared_ptr<AudioDiskstream> ds = at->audio_diskstream();
 511                         nframes_t frame_pos = ds->current_capture_start ();
 512                         gdouble xstart = _trackview.editor.frame_to_pixel (frame_pos);
 513                         gdouble xend;
 514                         uint32_t fill_color;
 515
 516                         switch (_trackview.audio_track()->mode()) {
 517                         case Normal:
 518                                 xend = xstart;
 519                                 fill_color = color_map[cRecordingRectFill];
 520                                 break;
 521
 522                         case Destructive:
 523                                 xend = xstart + 2;
 524                                 fill_color = color_map[cRecordingRectFill];
 525                                 /* make the recording rect translucent to allow
 526                                    the user to see the peak data coming in, etc.
 527                                 */
 528                                 fill_color = UINT_RGBA_CHANGE_A (fill_color, 120);
 529                                 break;
 530                         }
 531
 532                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*canvas_group);
 533                         rec_rect->property_x1() = xstart;
 534                         rec_rect->property_y1() = 1.0;
 535                         rec_rect->property_x2() = xend;
 536                         rec_rect->property_y2() = (double) _trackview.height - 1;
 537                         rec_rect->property_outline_color_rgba() = color_map[cRecordingRectOutline];
 538                         rec_rect->property_fill_color_rgba() = fill_color;
 539
 540                         RecBoxInfo recbox;
 541                         recbox.rectangle = rec_rect;
 542                         recbox.start = _trackview.session().transport_frame();
 543                         recbox.length = 0;
 544
 545                         rec_rects.push_back (recbox);
 546
 547                         screen_update_connection.disconnect();
 548                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun (*this, &AudioStreamView::update_rec_box));
 549                         rec_updating = true;
 550                         rec_active = true;
 551
 552                 } else if (rec_active &&
 553                            (_trackview.session().record_status() != Session::Recording ||
 554                             !_trackview.get_diskstream()->record_enabled())) {
 555
 556                         screen_update_connection.disconnect();
 557                         rec_active = false;
 558                         rec_updating = false;
 559
 560                 }
 561
 562         } else {
 563
 564                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 565
 566                 if (!rec_rects.empty() || !rec_regions.empty()) {
 567
 568                         /* disconnect rapid update */
 569                         screen_update_connection.disconnect();
 570
 571                         for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 572                                 (*prc).disconnect();
 573                         }
 574                         rec_data_ready_connections.clear();
 575
 576                         rec_updating = false;
 577                         rec_active = false;
 578                         last_rec_data_frame = 0;
 579
 580                         /* remove temp regions */
 581
 582                         for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); ) {
 583                                 list<boost::shared_ptr<Region> >::iterator tmp;
 584
 585                                 tmp = iter;
 586                                 ++tmp;
 587
 588                                 (*iter)->drop_references ();
 589
 590                                 iter = tmp;
 591                         }
 592
 593                         rec_regions.clear();
 594
 595                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 596
 597                         /* transport stopped, clear boxes */
 598                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 599                                 RecBoxInfo &rect = (*iter);
 600                                 delete rect.rectangle;
 601                         }
 602
 603                         rec_rects.clear();
 604
 605                 }
 606         }
 607 }
 608
 609 void
 610 AudioStreamView::foreach_crossfadeview (void (CrossfadeView::*pmf)(void))
 611 {
 612         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 613                 ((*i)->*pmf) ();
 614         }
 615 }
 616
 617 void
 618 AudioStreamView::rec_peak_range_ready (nframes_t start, nframes_t cnt, boost::weak_ptr<Source> weak_src)
 619 {
 620         ENSURE_GUI_THREAD(bind (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), start, cnt, weak_src));
 621
 622         boost::shared_ptr<Source> src (weak_src.lock());
 623
 624         if (!src) {
 625                 return;
 626         }
 627
 628         // this is called from the peak building thread
 629
 630         if (rec_data_ready_map.size() == 0 || start+cnt > last_rec_data_frame) {
 631                 last_rec_data_frame = start + cnt;
 632         }
 633
 634         rec_data_ready_map[src] = true;
 635
 636         if (rec_data_ready_map.size() == _trackview.get_diskstream()->n_channels().n_audio()) {
 637                 this->update_rec_regions ();
 638                 rec_data_ready_map.clear();
 639         }
 640 }
 641
 642 void
 643 AudioStreamView::update_rec_regions ()
 644 {
 645         if (use_rec_regions) {
 646
 647                 uint32_t n = 0;
 648
 649                 for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); n++) {
 650
 651                         list<boost::shared_ptr<Region> >::iterator tmp;
 652
 653                         tmp = iter;
 654                         ++tmp;
 655
 656                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 657                                 /* rect already hidden, this region is done */
 658                                 iter = tmp;
 659                                 continue;
 660                         }
 661
 662                         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion>(*iter);
 663                         if (!region) {
 664                                 continue;
 665                         }
 666
 667                         nframes_t origlen = region->length();
 668
 669                         if (region == rec_regions.back() && rec_active) {
 670
 671                                 if (last_rec_data_frame > region->start()) {
 672
 673                                         nframes_t nlen = last_rec_data_frame - region->start();
 674
 675                                         if (nlen != region->length()) {
 676
 677                                                 region->freeze ();
 678                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 679                                                 region->set_length (nlen, this);
 680                                                 region->thaw ("updated");
 681
 682                                                 if (origlen == 1) {
 683                                                         /* our special initial length */
 684                                                         add_region_view_internal (region, false);
 685                                                 }
 686
 687                                                 /* also update rect */
 688                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 689                                                 gdouble xend = _trackview.editor.frame_to_pixel (region->position() + region->length());
 690                                                 rect->property_x2() = xend;
 691                                         }
 692                                 }
 693
 694                         } else {
 695
 696                                 nframes_t nlen = _trackview.get_diskstream()->get_captured_frames(n);
 697
 698                                 if (nlen != region->length()) {
 699
 700                                         if (region->source(0)->length() >= region->start() + nlen) {
 701
 702                                                 region->freeze ();
 703                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 704                                                 region->set_length (nlen, this);
 705                                                 region->thaw ("updated");
 706
 707                                                 if (origlen == 1) {
 708                                                         /* our special initial length */
 709                                                         add_region_view_internal (region, false);
 710                                                 }
 711
 712                                                 /* also hide rect */
 713                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 714                                                 rect->hide();
 715
 716                                         }
 717                                 }
 718                         }
 719
 720                         iter = tmp;
 721                 }
 722         }
 723 }
 724
 725 void
 726 AudioStreamView::show_all_xfades ()
 727 {
 728         foreach_crossfadeview (&CrossfadeView::show);
 729         crossfades_visible = true;
 730 }
 731
 732 void
 733 AudioStreamView::hide_all_xfades ()
 734 {
 735         foreach_crossfadeview (&CrossfadeView::hide);
 736         crossfades_visible = false;
 737 }
 738
 739 void
 740 AudioStreamView::hide_xfades_involving (AudioRegionView& rv)
 741 {
 742         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 743                 if ((*i)->crossfade->involves (rv.audio_region())) {
 744                         (*i)->fake_hide ();
 745                 }
 746         }
 747 }
 748
 749 void
 750 AudioStreamView::reveal_xfades_involving (AudioRegionView& rv)
 751 {
 752         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 753                 if ((*i)->crossfade->involves (rv.audio_region()) && (*i)->visible() && layer_display != Stacked) {
 754                         (*i)->show ();
 755                 }
 756         }
 757 }
 758
 759 void
 760 AudioStreamView::color_handler (ColorID id, uint32_t val)
 761 {
 762         switch (id) {
 763         case cAudioTrackBase:
 764                 if (_trackview.is_track()) {
 765                         canvas_rect->property_fill_color_rgba() = val;
 766                 }
 767                 break;
 768         case cAudioBusBase:
 769                 if (!_trackview.is_track()) {
 770                         canvas_rect->property_fill_color_rgba() = val;
 771                 }
 772                 break;
 773         case cAudioTrackOutline:
 774                 canvas_rect->property_outline_color_rgba() = val;
 775                 break;
 776
 777         default:
 778                 break;
 779         }
 780 }
 781
 782 void
 783 AudioStreamView::update_contents_y_position_and_height ()
 784 {
 785         StreamView::update_contents_y_position_and_height ();
 786
 787         for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 788                 if (layer_display == Overlaid) {
 789                         (*i)->show ();
 790                         (*i)->set_y_position_and_height (0, height);
 791                 } else {
 792                         (*i)->hide ();
 793                 }
 794         }
 795 }