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         _waveform_scale = LinearWaveform;
  60         _waveform_shape = Traditional;
  61
  62         if (tv.is_track())
  63                 stream_base_color = color_map[cAudioTrackBase];
  64         else
  65                 stream_base_color = color_map[cAudioBusBase];
  66
  67         canvas_rect->property_fill_color_rgba() = stream_base_color;
  68         canvas_rect->property_outline_color_rgba() = color_map[cAudioTrackOutline];
  69
  70         _amplitude_above_axis = 1.0;
  71
  72         use_rec_regions = tv.editor.show_waveforms_recording ();
  73
  74 }
  75
  76 AudioStreamView::~AudioStreamView ()
  77 {
  78 }
  79
  80 int
  81 AudioStreamView::set_height (gdouble h)
  82 {
  83         /* limit the values to something sane-ish */
  84         if (h < 10.0 || h > 1000.0) {
  85                 return -1;
  86         }
  87
  88         StreamView::set_height(h);
  89
  90         for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
  91                 (*i)->set_height (h);
  92         }
  93
  94         return 0;
  95 }
  96
  97 int
  98 AudioStreamView::set_samples_per_unit (gdouble spp)
  99 {
 100         StreamView::set_samples_per_unit(spp);
 101
 102         for (CrossfadeViewList::iterator xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
 103                 (*xi)->set_samples_per_unit (spp);
 104         }
 105
 106         return 0;
 107 }
 108
 109 int
 110 AudioStreamView::set_amplitude_above_axis (gdouble app)
 111 {
 112         RegionViewList::iterator i;
 113
 114         if (app < 1.0) {
 115                 return -1;
 116         }
 117
 118         _amplitude_above_axis = app;
 119
 120         for (i = region_views.begin(); i != region_views.end(); ++i) {
 121                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 122                 if (arv)
 123                         arv->set_amplitude_above_axis (app);
 124         }
 125
 126         return 0;
 127 }
 128
 129 void
 130 AudioStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wait_for_waves)
 131 {
 132         AudioRegionView *region_view;
 133
 134         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_region_view), r));
 135
 136         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (r);
 137
 138         if (region == 0) {
 139                 return;
 140         }
 141
 142         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 143                 if ((*i)->region() == r) {
 144
 145                         /* great. we already have a AudioRegionView for this Region. use it again. */
 146
 147                         (*i)->set_valid (true);
 148
 149                         // this might not be necessary
 150                         AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 151                         if (arv) {
 152                                 arv->set_waveform_scale (_waveform_scale);
 153                                 arv->set_waveform_shape (_waveform_shape);
 154                         }
 155
 156                         return;
 157                 }
 158         }
 159
 160         switch (_trackview.audio_track()->mode()) {
 161         case Normal:
 162                 region_view = new AudioRegionView (canvas_group, _trackview, region,
 163                                                    _samples_per_unit, region_color);
 164                 break;
 165         case Destructive:
 166                 region_view = new TapeAudioRegionView (canvas_group, _trackview, region,
 167                                                        _samples_per_unit, region_color);
 168                 break;
 169         }
 170
 171         region_view->init (region_color, wait_for_waves);
 172         region_view->set_amplitude_above_axis(_amplitude_above_axis);
 173         region_views.push_front (region_view);
 174
 175         /* if this was the first one, then lets query the waveform scale and shape.
 176            otherwise, we set it to the current value */
 177
 178         if (region_views.size() == 1) {
 179                 if (region_view->waveform_logscaled()) {
 180                         _waveform_scale = LogWaveform;
 181                 } else {
 182                         _waveform_scale = LinearWaveform;
 183                 }
 184
 185                 if (region_view->waveform_rectified()) {
 186                         _waveform_shape = Rectified;
 187                 } else {
 188                         _waveform_shape = Traditional;
 189                 }
 190         }
 191         else {
 192                 region_view->set_waveform_scale(_waveform_scale);
 193                 region_view->set_waveform_shape(_waveform_shape);
 194         }
 195
 196         /* follow global waveform setting */
 197
 198         region_view->set_waveform_visible(_trackview.editor.show_waveforms());
 199
 200         /* catch regionview going away */
 201         region->GoingAway.connect (bind (mem_fun (*this, &AudioStreamView::remove_region_view), boost::weak_ptr<Region> (r)));
 202
 203         RegionViewAdded (region_view);
 204 }
 205
 206 void
 207 AudioStreamView::remove_region_view (boost::weak_ptr<Region> weak_r)
 208 {
 209         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_region_view), weak_r));
 210
 211         boost::shared_ptr<Region> r (weak_r.lock());
 212
 213         if (!r) {
 214                 return;
 215         }
 216
 217         if (!_trackview.session().deletion_in_progress()) {
 218
 219                 for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end();) {
 220                         list<CrossfadeView*>::iterator tmp;
 221
 222                         tmp = i;
 223                         ++tmp;
 224
 225                         boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(r);
 226                         if (ar && (*i)->crossfade.involves (ar)) {
 227                                 delete *i;
 228                                 crossfade_views.erase (i);
 229                         }
 230
 231                         i = tmp;
 232                 }
 233         }
 234
 235         StreamView::remove_region_view(r);
 236 }
 237
 238 void
 239 AudioStreamView::undisplay_diskstream ()
 240 {
 241         StreamView::undisplay_diskstream();
 242
 243         for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 244                 delete *i;
 245         }
 246
 247         crossfade_views.clear ();
 248 }
 249
 250 void
 251 AudioStreamView::playlist_modified ()
 252 {
 253         ENSURE_GUI_THREAD (mem_fun (*this, &AudioStreamView::playlist_modified));
 254
 255         StreamView::playlist_modified();
 256
 257         /* make sure xfades are on top and all the regionviews are stacked correctly. */
 258
 259         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 260                 (*i)->get_canvas_group()->raise_to_top();
 261         }
 262 }
 263
 264 void
 265 AudioStreamView::playlist_changed (boost::shared_ptr<Diskstream> ds)
 266 {
 267         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::playlist_changed), ds));
 268
 269         StreamView::playlist_changed(ds);
 270
 271         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(ds->playlist());
 272         if (apl)
 273                 playlist_connections.push_back (apl->NewCrossfade.connect (mem_fun (*this, &AudioStreamView::add_crossfade)));
 274 }
 275
 276 void
 277 AudioStreamView::add_crossfade (Crossfade *crossfade)
 278 {
 279         AudioRegionView* lview = 0;
 280         AudioRegionView* rview = 0;
 281
 282         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_crossfade), crossfade));
 283
 284         /* first see if we already have a CrossfadeView for this Crossfade */
 285
 286         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 287                 if ((*i)->crossfade == *crossfade) {
 288                         if (!crossfades_visible) {
 289                                 (*i)->hide();
 290                         } else {
 291                                 (*i)->show ();
 292                         }
 293                         (*i)->set_valid (true);
 294                         return;
 295                 }
 296         }
 297
 298         /* create a new one */
 299
 300         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 301                 AudioRegionView* arv = dynamic_cast<AudioRegionView*>(*i);
 302
 303                 if (!lview && arv && (arv->region() == crossfade->out())) {
 304                         lview = arv;
 305                 }
 306                 if (!rview && arv && (arv->region() == crossfade->in())) {
 307                         rview = arv;
 308                 }
 309         }
 310
 311         CrossfadeView *cv = new CrossfadeView (_trackview.canvas_display,
 312                                                _trackview,
 313                                                *crossfade,
 314                                                _samples_per_unit,
 315                                                region_color,
 316                                                *lview, *rview);
 317
 318         crossfade->Invalidated.connect (mem_fun (*this, &AudioStreamView::remove_crossfade));
 319         crossfade_views.push_back (cv);
 320
 321         if (!Config->get_xfades_visible() || !crossfades_visible) {
 322                 cv->hide ();
 323         }
 324 }
 325
 326 void
 327 AudioStreamView::remove_crossfade (Crossfade *xfade)
 328 {
 329         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_crossfade), xfade));
 330
 331         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 332                 if (&(*i)->crossfade == xfade) {
 333                         delete *i;
 334                         crossfade_views.erase (i);
 335                         break;
 336                 }
 337         }
 338 }
 339
 340 void
 341 AudioStreamView::redisplay_diskstream ()
 342 {
 343         list<RegionView *>::iterator i, tmp;
 344         list<CrossfadeView*>::iterator xi, tmpx;
 345
 346         for (i = region_views.begin(); i != region_views.end(); ++i) {
 347                 (*i)->set_valid (false);
 348         }
 349
 350         for (xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
 351                 (*xi)->set_valid (false);
 352                 if ((*xi)->visible()) {
 353                         (*xi)->show ();
 354                 }
 355         }
 356
 357         if (_trackview.is_audio_track()) {
 358                 _trackview.get_diskstream()->playlist()->foreach_region (static_cast<StreamView*>(this), &StreamView::add_region_view);
 359
 360                 boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(_trackview.get_diskstream()->playlist());
 361                 if (apl)
 362                         apl->foreach_crossfade (this, &AudioStreamView::add_crossfade);
 363         }
 364
 365         for (i = region_views.begin(); i != region_views.end(); ) {
 366                 tmp = i;
 367                 tmp++;
 368
 369                 if (!(*i)->is_valid()) {
 370                         delete *i;
 371                         region_views.erase (i);
 372                 }
 373
 374                 i = tmp;
 375         }
 376
 377         for (xi = crossfade_views.begin(); xi != crossfade_views.end();) {
 378                 tmpx = xi;
 379                 tmpx++;
 380
 381                 if (!(*xi)->valid()) {
 382                         delete *xi;
 383                         crossfade_views.erase (xi);
 384                 }
 385
 386                 xi = tmpx;
 387         }
 388
 389         /* now fix layering */
 390
 391         for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 392                 region_layered (*i);
 393         }
 394 }
 395
 396 void
 397 AudioStreamView::set_show_waveforms (bool yn)
 398 {
 399         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 400                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 401                 if (arv)
 402                         arv->set_waveform_visible (yn);
 403         }
 404 }
 405
 406 void
 407 AudioStreamView::set_waveform_shape (WaveformShape shape)
 408 {
 409         for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 410                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 411                 if (arv)
 412                         arv->set_waveform_shape (shape);
 413         }
 414         _waveform_shape = shape;
 415 }
 416
 417 void
 418 AudioStreamView::set_waveform_scale (WaveformScale scale)
 419 {
 420         for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 421                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 422                 if (arv)
 423                         arv->set_waveform_scale (scale);
 424         }
 425         _waveform_scale = scale;
 426 }
 427
 428 void
 429 AudioStreamView::setup_rec_box ()
 430 {
 431         // cerr << _trackview.name() << " streamview SRB\n";
 432
 433         if (_trackview.session().transport_rolling()) {
 434
 435                 // cerr << "\trolling\n";
 436
 437                 if (!rec_active &&
 438                     _trackview.session().record_status() == Session::Recording &&
 439                     _trackview.get_diskstream()->record_enabled()) {
 440
 441                         if (_trackview.audio_track()->mode() == Normal && use_rec_regions && rec_regions.size() == rec_rects.size()) {
 442
 443                                 /* add a new region, but don't bother if they set use_rec_regions mid-record */
 444
 445                                 SourceList sources;
 446
 447                                 for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 448                                         (*prc).disconnect();
 449                                 }
 450                                 rec_data_ready_connections.clear();
 451
 452                                 // FIXME
 453                                 boost::shared_ptr<AudioDiskstream> ads = boost::dynamic_pointer_cast<AudioDiskstream>(_trackview.get_diskstream());
 454                                 assert(ads);
 455
 456                                 for (uint32_t n=0; n < ads->n_channels().get(DataType::AUDIO); ++n) {
 457                                         boost::shared_ptr<AudioFileSource> src = boost::static_pointer_cast<AudioFileSource> (ads->write_source (n));
 458                                         if (src) {
 459                                                 sources.push_back (src);
 460
 461                                                 rec_data_ready_connections.push_back (src->PeakRangeReady.connect (bind
 462                                                         (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), boost::weak_ptr<Source>(src))));
 463                                         }
 464                                 }
 465
 466                                 // handle multi
 467
 468                                 nframes_t start = 0;
 469                                 if (rec_regions.size() > 0) {
 470                                         start = rec_regions.back()->start() + _trackview.get_diskstream()->get_captured_frames(rec_regions.size()-1);
 471                                 }
 472
 473                                 boost::shared_ptr<AudioRegion> region (boost::dynamic_pointer_cast<AudioRegion>
 474                                                                        (RegionFactory::create (sources, start, 1 , "", 0, (Region::Flag)(Region::DefaultFlags | Region::DoNotSaveState), false)));
 475                                 assert(region);
 476                                 region->set_position (_trackview.session().transport_frame(), this);
 477
 478                                 rec_regions.push_back (region);
 479                         }
 480
 481                         /* start a new rec box */
 482
 483                         AudioTrack* at;
 484
 485                         at = _trackview.audio_track(); /* we know what it is already */
 486                         boost::shared_ptr<AudioDiskstream> ds = at->audio_diskstream();
 487                         nframes_t frame_pos = ds->current_capture_start ();
 488                         gdouble xstart = _trackview.editor.frame_to_pixel (frame_pos);
 489                         gdouble xend;
 490                         uint32_t fill_color;
 491
 492                         switch (_trackview.audio_track()->mode()) {
 493                         case Normal:
 494                                 xend = xstart;
 495                                 fill_color = color_map[cRecordingRectFill];
 496                                 break;
 497
 498                         case Destructive:
 499                                 xend = xstart + 2;
 500                                 fill_color = color_map[cRecordingRectFill];
 501                                 /* make the recording rect translucent to allow
 502                                    the user to see the peak data coming in, etc.
 503                                 */
 504                                 fill_color = UINT_RGBA_CHANGE_A (fill_color, 120);
 505                                 break;
 506                         }
 507
 508                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*canvas_group);
 509                         rec_rect->property_x1() = xstart;
 510                         rec_rect->property_y1() = 1.0;
 511                         rec_rect->property_x2() = xend;
 512                         rec_rect->property_y2() = (double) _trackview.height - 1;
 513                         rec_rect->property_outline_color_rgba() = color_map[cRecordingRectOutline];
 514                         rec_rect->property_fill_color_rgba() = fill_color;
 515
 516                         RecBoxInfo recbox;
 517                         recbox.rectangle = rec_rect;
 518                         recbox.start = _trackview.session().transport_frame();
 519                         recbox.length = 0;
 520
 521                         rec_rects.push_back (recbox);
 522
 523                         screen_update_connection.disconnect();
 524                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun (*this, &AudioStreamView::update_rec_box));
 525                         rec_updating = true;
 526                         rec_active = true;
 527
 528                 } else if (rec_active &&
 529                            (_trackview.session().record_status() != Session::Recording ||
 530                             !_trackview.get_diskstream()->record_enabled())) {
 531
 532                         screen_update_connection.disconnect();
 533                         rec_active = false;
 534                         rec_updating = false;
 535
 536                 }
 537
 538         } else {
 539
 540                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 541
 542                 if (!rec_rects.empty() || !rec_regions.empty()) {
 543
 544                         /* disconnect rapid update */
 545                         screen_update_connection.disconnect();
 546
 547                         for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 548                                 (*prc).disconnect();
 549                         }
 550                         rec_data_ready_connections.clear();
 551
 552                         rec_updating = false;
 553                         rec_active = false;
 554                         last_rec_data_frame = 0;
 555
 556                         /* remove temp regions */
 557
 558                         for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); ) {
 559                                 list<boost::shared_ptr<Region> >::iterator tmp;
 560
 561                                 tmp = iter;
 562                                 ++tmp;
 563
 564                                 (*iter)->drop_references ();
 565
 566                                 iter = tmp;
 567                         }
 568
 569                         rec_regions.clear();
 570
 571                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 572
 573                         /* transport stopped, clear boxes */
 574                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 575                                 RecBoxInfo &rect = (*iter);
 576                                 delete rect.rectangle;
 577                         }
 578
 579                         rec_rects.clear();
 580
 581                 }
 582         }
 583 }
 584
 585 void
 586 AudioStreamView::foreach_crossfadeview (void (CrossfadeView::*pmf)(void))
 587 {
 588         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 589                 ((*i)->*pmf) ();
 590         }
 591 }
 592
 593 void
 594 AudioStreamView::rec_peak_range_ready (nframes_t start, nframes_t cnt, boost::weak_ptr<Source> weak_src)
 595 {
 596         ENSURE_GUI_THREAD(bind (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), start, cnt, weak_src));
 597
 598         boost::shared_ptr<Source> src (weak_src.lock());
 599
 600         if (!src) {
 601                 return;
 602         }
 603
 604         // this is called from the peak building thread
 605
 606         if (rec_data_ready_map.size() == 0 || start+cnt > last_rec_data_frame) {
 607                 last_rec_data_frame = start + cnt;
 608         }
 609
 610         rec_data_ready_map[src] = true;
 611
 612         if (rec_data_ready_map.size() == _trackview.get_diskstream()->n_channels().get(DataType::AUDIO)) {
 613                 this->update_rec_regions ();
 614                 rec_data_ready_map.clear();
 615         }
 616 }
 617
 618 void
 619 AudioStreamView::update_rec_regions ()
 620 {
 621         if (use_rec_regions) {
 622
 623                 uint32_t n = 0;
 624
 625                 for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); n++) {
 626
 627                         list<boost::shared_ptr<Region> >::iterator tmp;
 628
 629                         tmp = iter;
 630                         ++tmp;
 631
 632                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 633                                 /* rect already hidden, this region is done */
 634                                 iter = tmp;
 635                                 continue;
 636                         }
 637
 638                         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion>(*iter);
 639                         if (!region) {
 640                                 continue;
 641                         }
 642
 643                         nframes_t origlen = region->length();
 644
 645                         if (region == rec_regions.back() && rec_active) {
 646
 647                                 if (last_rec_data_frame > region->start()) {
 648
 649                                         nframes_t nlen = last_rec_data_frame - region->start();
 650
 651                                         if (nlen != region->length()) {
 652
 653                                                 region->freeze ();
 654                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 655                                                 region->set_length (nlen, this);
 656                                                 region->thaw ("updated");
 657
 658                                                 if (origlen == 1) {
 659                                                         /* our special initial length */
 660                                                         add_region_view_internal (region, false);
 661                                                 }
 662
 663                                                 /* also update rect */
 664                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 665                                                 gdouble xend = _trackview.editor.frame_to_pixel (region->position() + region->length());
 666                                                 rect->property_x2() = xend;
 667                                         }
 668                                 }
 669
 670                         } else {
 671
 672                                 nframes_t nlen = _trackview.get_diskstream()->get_captured_frames(n);
 673
 674                                 if (nlen != region->length()) {
 675
 676                                         if (region->source(0)->length() >= region->start() + nlen) {
 677
 678                                                 region->freeze ();
 679                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 680                                                 region->set_length (nlen, this);
 681                                                 region->thaw ("updated");
 682
 683                                                 if (origlen == 1) {
 684                                                         /* our special initial length */
 685                                                         add_region_view_internal (region, false);
 686                                                 }
 687
 688                                                 /* also hide rect */
 689                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 690                                                 rect->hide();
 691
 692                                         }
 693                                 }
 694                         }
 695
 696                         iter = tmp;
 697                 }
 698         }
 699 }
 700
 701 void
 702 AudioStreamView::show_all_xfades ()
 703 {
 704         foreach_crossfadeview (&CrossfadeView::show);
 705         crossfades_visible = true;
 706 }
 707
 708 void
 709 AudioStreamView::hide_all_xfades ()
 710 {
 711         foreach_crossfadeview (&CrossfadeView::hide);
 712         crossfades_visible = false;
 713 }
 714
 715 void
 716 AudioStreamView::hide_xfades_involving (AudioRegionView& rv)
 717 {
 718         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 719                 if ((*i)->crossfade.involves (rv.audio_region())) {
 720                         (*i)->fake_hide ();
 721                 }
 722         }
 723 }
 724
 725 void
 726 AudioStreamView::reveal_xfades_involving (AudioRegionView& rv)
 727 {
 728         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 729                 if ((*i)->crossfade.involves (rv.audio_region()) && (*i)->visible()) {
 730                         (*i)->show ();
 731                 }
 732         }
 733 }
 734
 735 void
 736 AudioStreamView::color_handler (ColorID id, uint32_t val)
 737 {
 738         switch (id) {
 739         case cAudioTrackBase:
 740                 if (_trackview.is_track()) {
 741                         canvas_rect->property_fill_color_rgba() = val;
 742                 }
 743                 break;
 744         case cAudioBusBase:
 745                 if (!_trackview.is_track()) {
 746                         canvas_rect->property_fill_color_rgba() = val;
 747                 }
 748                 break;
 749         case cAudioTrackOutline:
 750                 canvas_rect->property_outline_color_rgba() = val;
 751                 break;
 752
 753         default:
 754                 break;
 755         }
 756 }
 757