gtk2_ardour/crossfade_edit.cc

   1 /*
   2     Copyright (C) 2004 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
  20 #include <cmath>
  21
  22 #include <sigc++/bind.h>
  23
  24 #include <gtkmm/frame.h>
  25 #include <gtkmm/image.h>
  26 #include <gtkmm/scrolledwindow.h>
  27
  28 #include <libgnomecanvasmm/line.h>
  29
  30 #include <ardour/automation_list.h>
  31 #include <evoral/Curve.hpp>
  32 #include <ardour/crossfade.h>
  33 #include <ardour/session.h>
  34 #include <ardour/auditioner.h>
  35 #include <ardour/audioplaylist.h>
  36 #include <ardour/audiosource.h>
  37 #include <ardour/playlist_templates.h>
  38 #include <ardour/region_factory.h>
  39
  40 #include <gtkmm2ext/gtk_ui.h>
  41
  42 #include "ardour_ui.h"
  43 #include "crossfade_edit.h"
  44 #include "rgb_macros.h"
  45 #include "keyboard.h"
  46 #include "utils.h"
  47 #include "gui_thread.h"
  48 #include "canvas_impl.h"
  49 #include "simplerect.h"
  50 #include "waveview.h"
  51
  52 using namespace std;
  53 using namespace ARDOUR;
  54 using namespace PBD;
  55 using namespace Gtk;
  56 using namespace sigc;
  57 using namespace Editing;
  58
  59 #include "i18n.h"
  60
  61 const int32_t CrossfadeEditor::Point::size = 7;
  62 const double CrossfadeEditor::canvas_border = 10;
  63 CrossfadeEditor::Presets* CrossfadeEditor::fade_in_presets = 0;
  64 CrossfadeEditor::Presets* CrossfadeEditor::fade_out_presets = 0;
  65
  66 CrossfadeEditor::Half::Half ()
  67         : line (0),
  68           normative_curve (Parameter(GainAutomation, 0.0, 1.0, 1.0)), // FIXME: GainAutomation?
  69           gain_curve (Parameter(GainAutomation))
  70 {
  71 }
  72
  73 CrossfadeEditor::CrossfadeEditor (Session& s, boost::shared_ptr<Crossfade> xf, double my, double mxy)
  74         : ArdourDialog (_("ardour: x-fade edit")),
  75           xfade (xf),
  76           session (s),
  77           clear_button (_("Clear")),
  78           revert_button (_("Reset")),
  79           audition_both_button (_("Fade")),
  80           audition_left_dry_button (_("Out (dry)")),
  81           audition_left_button (_("Out")),
  82           audition_right_dry_button (_("In (dry)")),
  83           audition_right_button (_("In")),
  84
  85           preroll_button (_("With Pre-roll")),
  86           postroll_button (_("With Post-roll")),
  87
  88           miny (my),
  89           maxy (mxy),
  90
  91           fade_in_table (3, 3),
  92           fade_out_table (3, 3),
  93
  94           select_in_button (_("Fade In")),
  95           select_out_button (_("Fade Out"))
  96 {
  97         set_wmclass (X_("ardour_automationedit"), "Ardour");
  98         set_name ("CrossfadeEditWindow");
  99         set_position (Gtk::WIN_POS_MOUSE);
 100
 101         add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
 102
 103         RadioButtonGroup sel_but_group = select_in_button.get_group();
 104         select_out_button.set_group (sel_but_group);
 105         select_out_button.set_mode (false);
 106         select_in_button.set_mode (false);
 107
 108         get_action_area()->set_layout(BUTTONBOX_SPREAD);
 109         get_action_area()->pack_start(clear_button);
 110         get_action_area()->pack_start(revert_button);
 111         cancel_button = add_button ("Cancel", RESPONSE_CANCEL);
 112         ok_button = add_button ("OK", RESPONSE_ACCEPT);
 113
 114         if (fade_in_presets == 0) {
 115                 build_presets ();
 116         }
 117
 118         point_grabbed = false;
 119         toplevel = 0;
 120
 121         canvas = new ArdourCanvas::CanvasAA ();
 122         canvas->signal_size_allocate().connect (mem_fun(*this, &CrossfadeEditor::canvas_allocation));
 123         canvas->set_size_request (425, 200);
 124
 125         toplevel = new ArdourCanvas::SimpleRect (*(canvas->root()));
 126         toplevel->property_x1() =  0.0;
 127         toplevel->property_y1() =  0.0;
 128         toplevel->property_x2() =  10.0;
 129         toplevel->property_y2() =  10.0;
 130         toplevel->property_fill() =  true;
 131         toplevel->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorBase.get();
 132         toplevel->property_outline_pixels() =  0;
 133         toplevel->signal_event().connect (mem_fun (*this, &CrossfadeEditor::canvas_event));
 134
 135         fade[Out].line = new ArdourCanvas::Line (*(canvas->root()));
 136         fade[Out].line->property_width_pixels() = 1;
 137         fade[Out].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLine.get();
 138
 139         fade[Out].shading = new ArdourCanvas::Polygon (*(canvas->root()));
 140         fade[Out].shading->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLineShading.get();
 141
 142         fade[In].line = new ArdourCanvas::Line (*(canvas->root()));
 143         fade[In].line->property_width_pixels() = 1;
 144         fade[In].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLine.get();
 145
 146         fade[In].shading = new ArdourCanvas::Polygon (*(canvas->root()));
 147         fade[In].shading->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLineShading.get();
 148
 149         fade[In].shading->signal_event().connect (mem_fun (*this, &CrossfadeEditor::canvas_event));
 150         fade[In].line->signal_event().connect (mem_fun (*this, &CrossfadeEditor::curve_event));
 151         fade[Out].shading->signal_event().connect (mem_fun (*this, &CrossfadeEditor::canvas_event));
 152         fade[Out].line->signal_event().connect (mem_fun (*this, &CrossfadeEditor::curve_event));
 153
 154         select_in_button.set_name (X_("CrossfadeEditCurveButton"));
 155         select_out_button.set_name (X_("CrossfadeEditCurveButton"));
 156
 157         select_in_button.signal_clicked().connect (bind (mem_fun (*this, &CrossfadeEditor::curve_select_clicked), In));
 158         select_out_button.signal_clicked().connect (bind (mem_fun (*this, &CrossfadeEditor::curve_select_clicked), Out));
 159
 160         HBox* acbox = manage (new HBox);
 161
 162         audition_box.set_border_width (7);
 163         audition_box.set_spacing (5);
 164         audition_box.set_homogeneous (false);
 165         audition_box.pack_start (audition_left_dry_button, false, false);
 166         audition_box.pack_start (audition_left_button, false, false);
 167         audition_box.pack_start (audition_both_button, false, false);
 168         audition_box.pack_start (audition_right_button, false, false);
 169         audition_box.pack_start (audition_right_dry_button, false, false);
 170
 171         Frame* audition_frame = manage (new Frame (_("Audition")));
 172
 173         audition_frame->set_name (X_("CrossfadeEditFrame"));
 174         audition_frame->add (audition_box);
 175
 176         acbox->pack_start (*audition_frame, true, false);
 177
 178         Frame* canvas_frame = manage (new Frame);
 179         canvas_frame->add (*canvas);
 180         canvas_frame->set_shadow_type (Gtk::SHADOW_IN);
 181
 182         fade_in_table.attach (select_in_button, 0, 2, 0, 1, Gtk::FILL|Gtk::EXPAND);
 183         fade_out_table.attach (select_out_button, 0, 2, 0, 1, Gtk::FILL|Gtk::EXPAND);
 184
 185         Image *pxmap;
 186         Button* pbutton;
 187         int row;
 188         int col;
 189
 190         row = 1;
 191         col = 0;
 192
 193         for (list<Preset*>::iterator i = fade_in_presets->begin(); i != fade_in_presets->end(); ++i) {
 194
 195                 pxmap = manage (new Image (::get_icon ((*i)->image_name)));
 196                 pbutton = manage (new Button);
 197                 pbutton->add (*pxmap);
 198                 pbutton->set_name ("CrossfadeEditButton");
 199                 pbutton->signal_clicked().connect (bind (mem_fun(*this, &CrossfadeEditor::apply_preset), *i));
 200                 fade_in_table.attach (*pbutton, col, col+1, row, row+1);
 201                 fade_in_buttons.push_back (pbutton);
 202
 203                 col++;
 204
 205                 if (col == 2) {
 206                         col = 0;
 207                         row++;
 208                 }
 209         }
 210
 211         row = 1;
 212         col = 0;
 213
 214         for (list<Preset*>::iterator i = fade_out_presets->begin(); i != fade_out_presets->end(); ++i) {
 215
 216                 pxmap = manage (new Image (::get_icon ((*i)->image_name)));
 217                 pbutton = manage (new Button);
 218                 pbutton->add (*pxmap);
 219                 pbutton->set_name ("CrossfadeEditButton");
 220                 pbutton->signal_clicked().connect (bind (mem_fun(*this, &CrossfadeEditor::apply_preset), *i));
 221                 fade_out_table.attach (*pbutton, col, col+1, row, row+1);
 222                 fade_out_buttons.push_back (pbutton);
 223
 224                 col++;
 225
 226                 if (col == 2) {
 227                         col = 0;
 228                         row++;
 229                 }
 230         }
 231
 232         clear_button.set_name ("CrossfadeEditButton");
 233         revert_button.set_name ("CrossfadeEditButton");
 234         ok_button->set_name ("CrossfadeEditButton");
 235         cancel_button->set_name ("CrossfadeEditButton");
 236         preroll_button.set_name ("CrossfadeEditButton");
 237         postroll_button.set_name ("CrossfadeEditButton");
 238         audition_both_button.set_name ("CrossfadeEditAuditionButton");
 239         audition_left_dry_button.set_name ("CrossfadeEditAuditionButton");
 240         audition_left_button.set_name ("CrossfadeEditAuditionButton");
 241         audition_right_dry_button.set_name ("CrossfadeEditAuditionButton");
 242         audition_right_button.set_name ("CrossfadeEditAuditionButton");
 243
 244         clear_button.signal_clicked().connect (mem_fun(*this, &CrossfadeEditor::clear));
 245         revert_button.signal_clicked().connect (mem_fun(*this, &CrossfadeEditor::reset));
 246         audition_both_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_toggled));
 247         audition_right_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_right_toggled));
 248         audition_right_dry_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_right_dry_toggled));
 249         audition_left_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_left_toggled));
 250         audition_left_dry_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_left_dry_toggled));
 251
 252         roll_box.pack_start (preroll_button, false, false);
 253         roll_box.pack_start (postroll_button, false, false);
 254
 255         Gtk::HBox* rcenter_box = manage (new HBox);
 256         rcenter_box->pack_start (roll_box, true, false);
 257
 258         VBox* vpacker2 = manage (new (VBox));
 259
 260         vpacker2->set_border_width (12);
 261         vpacker2->set_spacing (7);
 262         vpacker2->pack_start (*acbox, false, false);
 263         vpacker2->pack_start (*rcenter_box, false, false);
 264
 265         curve_button_box.set_spacing (7);
 266         curve_button_box.pack_start (fade_out_table, false, false, 12);
 267         curve_button_box.pack_start (*vpacker2, false, false, 12);
 268         curve_button_box.pack_start (fade_in_table, false, false, 12);
 269
 270         get_vbox()->pack_start (*canvas_frame, true, true);
 271         get_vbox()->pack_start (curve_button_box, false, false);
 272
 273         /* button to allow hackers to check the actual curve values */
 274
 275 //      Button* foobut = manage (new Button ("dump"));
 276 //      foobut-.signal_clicked().connect (mem_fun(*this, &CrossfadeEditor::dump));
 277 //      vpacker.pack_start (*foobut, false, false);
 278
 279         current = In;
 280         set (xfade->fade_in(), In);
 281
 282         current = Out;
 283         set (xfade->fade_out(), Out);
 284
 285         curve_select_clicked (In);
 286
 287         xfade->StateChanged.connect (mem_fun(*this, &CrossfadeEditor::xfade_changed));
 288
 289         session.AuditionActive.connect (mem_fun(*this, &CrossfadeEditor::audition_state_changed));
 290         show_all_children();
 291 }
 292
 293 CrossfadeEditor::~CrossfadeEditor()
 294 {
 295         /* most objects will be destroyed when the toplevel window is. */
 296
 297         for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 298                 delete *i;
 299         }
 300
 301         for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 302                 delete *i;
 303         }
 304 }
 305
 306 void
 307 CrossfadeEditor::dump ()
 308 {
 309         for (AutomationList::iterator i = fade[Out].normative_curve.begin(); i != fade[Out].normative_curve.end(); ++i) {
 310                 cerr << (*i)->when << ' ' << (*i)->value << endl;
 311         }
 312 }
 313
 314 void
 315 CrossfadeEditor::audition_state_changed (bool yn)
 316 {
 317         ENSURE_GUI_THREAD (bind (mem_fun(*this, &CrossfadeEditor::audition_state_changed), yn));
 318
 319         if (!yn) {
 320                 audition_both_button.set_active (false);
 321                 audition_left_button.set_active (false);
 322                 audition_right_button.set_active (false);
 323                 audition_left_dry_button.set_active (false);
 324                 audition_right_dry_button.set_active (false);
 325         }
 326 }
 327
 328 void
 329 CrossfadeEditor::set (const ARDOUR::AutomationList& curve, WhichFade which)
 330 {
 331         double firstx, endx;
 332         ARDOUR::AutomationList::const_iterator the_end;
 333
 334         for (list<Point*>::iterator i = fade[which].points.begin(); i != fade[which].points.end(); ++i) {
 335                         delete *i;
 336         }
 337
 338         fade[which].points.clear ();
 339         fade[which].gain_curve.clear ();
 340         fade[which].normative_curve.clear ();
 341
 342         if (curve.empty()) {
 343                 goto out;
 344         }
 345
 346         the_end = curve.end();
 347         --the_end;
 348
 349         firstx = (*curve.begin())->when;
 350         endx = (*the_end)->when;
 351
 352         for (ARDOUR::AutomationList::const_iterator i = curve.begin(); i != curve.end(); ++i) {
 353
 354                 double xfract = ((*i)->when - firstx) / (endx - firstx);
 355                 double yfract = ((*i)->value - miny) / (maxy - miny);
 356
 357                 Point* p = make_point ();
 358
 359                 p->move_to (x_coordinate (xfract), y_coordinate (yfract),
 360                             xfract, yfract);
 361
 362                 fade[which].points.push_back (p);
 363         }
 364
 365         /* no need to sort because curve is already time-ordered */
 366
 367   out:
 368
 369         swap (which, current);
 370         redraw ();
 371         swap (which, current);
 372 }
 373
 374 bool
 375 CrossfadeEditor::curve_event (GdkEvent* event)
 376 {
 377         /* treat it like a toplevel event */
 378
 379         return canvas_event (event);
 380 }
 381
 382 bool
 383 CrossfadeEditor::point_event (GdkEvent* event, Point* point)
 384 {
 385
 386         if (point->curve != fade[current].line) {
 387                 return FALSE;
 388         }
 389
 390         switch (event->type) {
 391         case GDK_BUTTON_PRESS:
 392                 point_grabbed = true;
 393                 break;
 394         case GDK_BUTTON_RELEASE:
 395                 point_grabbed = false;
 396
 397                 if (Keyboard::is_delete_event (&event->button)) {
 398                         fade[current].points.remove (point);
 399                         delete point;
 400                 }
 401
 402                 redraw ();
 403                 break;
 404
 405         case GDK_MOTION_NOTIFY:
 406                 if (point_grabbed) {
 407                         double new_x, new_y;
 408
 409                         /* can't drag first or last points horizontally */
 410
 411                         if (point == fade[current].points.front() || point == fade[current].points.back()) {
 412                                 new_x = point->x;
 413                         } else {
 414                                 new_x = (event->motion.x - canvas_border)/effective_width();
 415                         }
 416
 417                         new_y = 1.0 - ((event->motion.y - canvas_border)/effective_height());
 418                         point->move_to (x_coordinate (new_x), y_coordinate (new_y),
 419                                         new_x, new_y);
 420                         redraw ();
 421                 }
 422                 break;
 423         default:
 424                 break;
 425         }
 426         return TRUE;
 427 }
 428
 429 bool
 430 CrossfadeEditor::canvas_event (GdkEvent* event)
 431 {
 432         switch (event->type) {
 433         case GDK_BUTTON_PRESS:
 434                 add_control_point ((event->button.x - canvas_border)/effective_width(),
 435                                    1.0 - ((event->button.y - canvas_border)/effective_height()));
 436                 return true;
 437                 break;
 438         default:
 439                 break;
 440         }
 441         return false;
 442 }
 443
 444 CrossfadeEditor::Point::~Point()
 445 {
 446         delete box;
 447 }
 448
 449 CrossfadeEditor::Point*
 450 CrossfadeEditor::make_point ()
 451 {
 452         Point* p = new Point;
 453
 454         p->box = new ArdourCanvas::SimpleRect (*(canvas->root()));
 455         p->box->property_fill() = true;
 456         p->box->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorPointFill.get();
 457         p->box->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorPointOutline.get();
 458         p->box->property_outline_pixels() = 1;
 459
 460         p->curve = fade[current].line;
 461
 462         p->box->signal_event().connect (bind (mem_fun (*this, &CrossfadeEditor::point_event), p));
 463
 464         return p;
 465 }
 466
 467 void
 468 CrossfadeEditor::add_control_point (double x, double y)
 469 {
 470         PointSorter cmp;
 471
 472         /* enforce end point x location */
 473
 474         if (fade[current].points.empty()) {
 475                 x = 0.0;
 476         } else if (fade[current].points.size() == 1) {
 477                 x = 1.0;
 478         }
 479
 480         Point* p = make_point ();
 481
 482         p->move_to (x_coordinate (x), y_coordinate (y), x, y);
 483
 484         fade[current].points.push_back (p);
 485         fade[current].points.sort (cmp);
 486
 487         redraw ();
 488 }
 489
 490 void
 491 CrossfadeEditor::Point::move_to (double nx, double ny, double xfract, double yfract)
 492 {
 493         const double half_size = rint(size/2.0);
 494         double x1 = nx - half_size;
 495         double x2 = nx + half_size;
 496
 497         box->property_x1() = x1;
 498         box->property_x2() = x2;
 499
 500         box->property_y1() = ny - half_size;
 501         box->property_y2() = ny + half_size;
 502
 503         x = xfract;
 504         y = yfract;
 505 }
 506
 507 void
 508 CrossfadeEditor::canvas_allocation (Gtk::Allocation& alloc)
 509 {
 510         if (toplevel) {
 511                 toplevel->property_x1() = 0.0;
 512                 toplevel->property_y1() = 0.0;
 513                 toplevel->property_x2() = (double) canvas->get_allocation().get_width() + canvas_border;
 514                 toplevel->property_y2() = (double) canvas->get_allocation().get_height() + canvas_border;
 515         }
 516
 517         canvas->set_scroll_region (0.0, 0.0,
 518                                    canvas->get_allocation().get_width(),
 519                                    canvas->get_allocation().get_height());
 520
 521         Point* end = make_point ();
 522         PointSorter cmp;
 523
 524         if (fade[In].points.size() > 1) {
 525                 Point* old_end = fade[In].points.back();
 526                 fade[In].points.pop_back ();
 527                 end->move_to (x_coordinate (old_end->x),
 528                               y_coordinate (old_end->y),
 529                               old_end->x, old_end->y);
 530                 delete old_end;
 531         } else {
 532                 double x = 1.0;
 533                 double y = 0.5;
 534                 end->move_to (x_coordinate (x), y_coordinate (y), x, y);
 535
 536         }
 537
 538         fade[In].points.push_back (end);
 539         fade[In].points.sort (cmp);
 540
 541         for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 542                 (*i)->move_to (x_coordinate((*i)->x), y_coordinate((*i)->y),
 543                                (*i)->x, (*i)->y);
 544         }
 545
 546         end = make_point ();
 547
 548         if (fade[Out].points.size() > 1) {
 549                 Point* old_end = fade[Out].points.back();
 550                 fade[Out].points.pop_back ();
 551                 end->move_to (x_coordinate (old_end->x),
 552                               y_coordinate (old_end->y),
 553                               old_end->x, old_end->y);
 554                 delete old_end;
 555         } else {
 556                 double x = 1.0;
 557                 double y = 0.5;
 558                 end->move_to (x_coordinate (x), y_coordinate (y), x, y);
 559
 560         }
 561
 562         fade[Out].points.push_back (end);
 563         fade[Out].points.sort (cmp);
 564
 565         for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 566                 (*i)->move_to (x_coordinate ((*i)->x),
 567                                y_coordinate ((*i)->y),
 568                                (*i)->x, (*i)->y);
 569         }
 570
 571         WhichFade old_current = current;
 572         current = In;
 573         redraw ();
 574         current = Out;
 575         redraw ();
 576         current = old_current;
 577
 578         double spu = xfade->length() / (double) effective_width();
 579
 580         if (fade[In].waves.empty()) {
 581                 make_waves (xfade->in(), In);
 582         }
 583
 584         if (fade[Out].waves.empty()) {
 585                 make_waves (xfade->out(), Out);
 586         }
 587
 588         double ht;
 589         vector<ArdourCanvas::WaveView*>::iterator i;
 590         uint32_t n;
 591
 592         ht = canvas->get_allocation().get_height() / xfade->in()->n_channels();
 593
 594         for (n = 0, i = fade[In].waves.begin(); i != fade[In].waves.end(); ++i, ++n) {
 595                 double yoff;
 596
 597                 yoff = n * ht;
 598
 599                 (*i)->property_y() = yoff;
 600                 (*i)->property_height() = ht;
 601                 (*i)->property_samples_per_unit() = spu;
 602         }
 603
 604         ht = canvas->get_allocation().get_height() / xfade->out()->n_channels();
 605
 606         for (n = 0, i = fade[Out].waves.begin(); i != fade[Out].waves.end(); ++i, ++n) {
 607                 double yoff;
 608
 609                 yoff = n * ht;
 610
 611                 (*i)->property_y() = yoff;
 612                 (*i)->property_height() = ht;
 613                 (*i)->property_samples_per_unit() = spu;
 614         }
 615
 616 }
 617
 618
 619 void
 620 CrossfadeEditor::xfade_changed (Change ignored)
 621 {
 622         set (xfade->fade_in(), In);
 623         set (xfade->fade_out(), Out);
 624 }
 625
 626 void
 627 CrossfadeEditor::redraw ()
 628 {
 629         if (canvas->get_allocation().get_width() < 2) {
 630                 return;
 631         }
 632
 633         nframes_t len = xfade->length ();
 634
 635         fade[current].normative_curve.clear ();
 636         fade[current].gain_curve.clear ();
 637
 638         for (list<Point*>::iterator i = fade[current].points.begin(); i != fade[current].points.end(); ++i) {
 639                 fade[current].normative_curve.add ((*i)->x, (*i)->y);
 640                 double offset;
 641                 if (current==In)
 642                         offset = xfade->in()->start();
 643                 else
 644                         offset = xfade->out()->start()+xfade->out()->length()-xfade->length();
 645                 fade[current].gain_curve.add (((*i)->x * len) + offset, (*i)->y);
 646         }
 647
 648
 649         size_t npoints = (size_t) effective_width();
 650         float vec[npoints];
 651
 652         fade[current].normative_curve.curve().get_vector (0, 1.0, vec, npoints);
 653
 654         ArdourCanvas::Points pts;
 655         ArdourCanvas::Points spts;
 656
 657         while (pts.size() < npoints) {
 658                 pts.push_back (Gnome::Art::Point (0,0));
 659         }
 660
 661         while (spts.size() < npoints + 3) {
 662                 spts.push_back (Gnome::Art::Point (0,0));
 663         }
 664
 665         /* the shade coordinates *MUST* be in anti-clockwise order.
 666          */
 667
 668         if (current == In) {
 669
 670                 /* lower left */
 671
 672                 spts[0].set_x (canvas_border);
 673                 spts[0].set_y (effective_height() + canvas_border);
 674
 675                 /* lower right */
 676
 677                 spts[1].set_x (effective_width() + canvas_border);
 678                 spts[1].set_y (effective_height() + canvas_border);
 679
 680                 /* upper right */
 681
 682                 spts[2].set_x (effective_width() + canvas_border);
 683                 spts[2].set_y (canvas_border);
 684
 685
 686         } else {
 687
 688                 /*  upper left */
 689
 690                 spts[0].set_x (canvas_border);
 691                 spts[0].set_y (canvas_border);
 692
 693                 /* lower left */
 694
 695                 spts[1].set_x (canvas_border);
 696                 spts[1].set_y (effective_height() + canvas_border);
 697
 698                 /* lower right */
 699
 700                 spts[2].set_x (effective_width() + canvas_border);
 701                 spts[2].set_y (effective_height() + canvas_border);
 702
 703         }
 704
 705         size_t last_spt = (npoints + 3) - 1;
 706
 707         for (size_t i = 0; i < npoints; ++i) {
 708
 709                 double y = vec[i];
 710
 711                 pts[i].set_x (canvas_border + i);
 712                 pts[i].set_y  (y_coordinate (y));
 713
 714                 spts[last_spt - i].set_x (canvas_border + i);
 715                 spts[last_spt - i].set_y (pts[i].get_y());
 716         }
 717
 718         fade[current].line->property_points() = pts;
 719         fade[current].shading->property_points() = spts;
 720
 721         for (vector<ArdourCanvas::WaveView*>::iterator i = fade[current].waves.begin(); i != fade[current].waves.end(); ++i) {
 722                 (*i)->property_gain_src() = &fade[current].gain_curve;
 723         }
 724 }
 725
 726 void
 727 CrossfadeEditor::apply_preset (Preset *preset)
 728 {
 729
 730         WhichFade wf =  find(fade_in_presets->begin(), fade_in_presets->end(), preset) != fade_in_presets->end() ? In : Out;
 731
 732         if (current != wf) {
 733
 734                 if (wf == In) {
 735                         select_in_button.clicked();
 736                 } else {
 737                         select_out_button.clicked();
 738                 }
 739
 740                 curve_select_clicked (wf);
 741         }
 742
 743         for (list<Point*>::iterator i = fade[current].points.begin(); i != fade[current].points.end(); ++i) {
 744                 delete *i;
 745         }
 746
 747         fade[current].points.clear ();
 748
 749         for (Preset::iterator i = preset->begin(); i != preset->end(); ++i) {
 750                 Point* p = make_point ();
 751                 p->move_to (x_coordinate ((*i).x), y_coordinate ((*i).y),
 752                             (*i).x, (*i).y);
 753                 fade[current].points.push_back (p);
 754         }
 755
 756         redraw ();
 757 }
 758
 759 void
 760 CrossfadeEditor::apply ()
 761 {
 762         _apply_to (xfade);
 763 }
 764
 765 void
 766 CrossfadeEditor::_apply_to (boost::shared_ptr<Crossfade> xf)
 767 {
 768         ARDOUR::AutomationList& in (xf->fade_in());
 769         ARDOUR::AutomationList& out (xf->fade_out());
 770
 771         /* IN */
 772
 773
 774         ARDOUR::AutomationList::const_iterator the_end = in.end();
 775         --the_end;
 776
 777         double firstx = (*in.begin())->when;
 778         double endx = (*the_end)->when;
 779         double miny = in.get_min_y ();
 780         double maxy = in.get_max_y ();
 781
 782         in.freeze ();
 783         in.clear ();
 784
 785         for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 786
 787                 double when = firstx + ((*i)->x * (endx - firstx));
 788                 double value = (*i)->y; // miny + ((*i)->y * (maxy - miny));
 789                 in.add (when, value);
 790         }
 791
 792         /* OUT */
 793
 794         the_end = out.end();
 795         --the_end;
 796
 797         firstx = (*out.begin())->when;
 798         endx = (*the_end)->when;
 799         miny = out.get_min_y ();
 800         maxy = out.get_max_y ();
 801
 802         out.freeze ();
 803         out.clear ();
 804
 805         for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 806
 807                 double when = firstx + ((*i)->x * (endx - firstx));
 808                 double value = (*i)->y; // miny + ((*i)->y * (maxy - miny));
 809                 out.add (when, value);
 810         }
 811
 812         in.thaw ();
 813         out.thaw ();
 814 }
 815
 816 void
 817 CrossfadeEditor::setup (boost::shared_ptr<Crossfade> xfade)
 818 {
 819         _apply_to (xfade);
 820         xfade->set_active (true);
 821         xfade->fade_in().curve().solve ();
 822         xfade->fade_out().curve().solve ();
 823 }
 824
 825 void
 826 CrossfadeEditor::clear ()
 827 {
 828         for (list<Point*>::iterator i = fade[current].points.begin(); i != fade[current].points.end(); ++i) {
 829                 delete *i;
 830         }
 831
 832         fade[current].points.clear ();
 833
 834         redraw ();
 835 }
 836
 837 void
 838 CrossfadeEditor::reset ()
 839 {
 840         set (xfade->fade_in(),  In);
 841         set (xfade->fade_out(), Out);
 842
 843         curve_select_clicked (current);
 844 }
 845
 846 void
 847 CrossfadeEditor::build_presets ()
 848 {
 849         Preset* p;
 850
 851         fade_in_presets = new Presets;
 852         fade_out_presets = new Presets;
 853
 854         /* FADE OUT */
 855         // p = new Preset ("hiin.xpm");
 856         p = new Preset ("crossfade_in_fast-cut");
 857         p->push_back (PresetPoint (0, 0));
 858         p->push_back (PresetPoint (0.0207373, 0.197222));
 859         p->push_back (PresetPoint (0.0645161, 0.525));
 860         p->push_back (PresetPoint (0.152074, 0.802778));
 861         p->push_back (PresetPoint (0.276498, 0.919444));
 862         p->push_back (PresetPoint (0.481567, 0.980556));
 863         p->push_back (PresetPoint (0.767281, 1));
 864         p->push_back (PresetPoint (1, 1));
 865         fade_in_presets->push_back (p);
 866
 867         // p = new Preset ("loin.xpm");
 868         p = new Preset ("crossfade_in_transition");
 869         p->push_back (PresetPoint (0, 0));
 870         p->push_back (PresetPoint (0.389401, 0.0333333));
 871         p->push_back (PresetPoint (0.629032, 0.0861111));
 872         p->push_back (PresetPoint (0.829493, 0.233333));
 873         p->push_back (PresetPoint (0.9447, 0.483333));
 874         p->push_back (PresetPoint (0.976959, 0.697222));
 875         p->push_back (PresetPoint (1, 1));
 876         fade_in_presets->push_back (p);
 877
 878         // p = new Preset ("regin.xpm");
 879         p = new Preset ("crossfade_in_constant");
 880         p->push_back (PresetPoint (0, 0));
 881         p->push_back (PresetPoint (0.0737327, 0.308333));
 882         p->push_back (PresetPoint (0.246544, 0.658333));
 883         p->push_back (PresetPoint (0.470046, 0.886111));
 884         p->push_back (PresetPoint (0.652074, 0.972222));
 885         p->push_back (PresetPoint (0.771889, 0.988889));
 886         p->push_back (PresetPoint (1, 1));
 887         fade_in_presets->push_back (p);
 888
 889         // p = new Preset ("regin2.xpm");
 890         p = new Preset ("crossfade_in_slow-cut");
 891         p->push_back (PresetPoint (0, 0));
 892         p->push_back (PresetPoint (0.304147, 0.0694444));
 893         p->push_back (PresetPoint (0.529954, 0.152778));
 894         p->push_back (PresetPoint (0.725806, 0.333333));
 895         p->push_back (PresetPoint (0.847926, 0.558333));
 896         p->push_back (PresetPoint (0.919355, 0.730556));
 897         p->push_back (PresetPoint (1, 1));
 898         fade_in_presets->push_back (p);
 899
 900         // p = new Preset ("linin.xpm");
 901         p = new Preset ("crossfade_in_dipped");
 902         p->push_back (PresetPoint (0, 0));
 903         p->push_back (PresetPoint (1, 1));
 904         fade_in_presets->push_back (p);
 905
 906         p = new Preset ("crossfade_in_default");
 907         p->push_back (PresetPoint (0, 0));
 908         p->push_back (PresetPoint (0.1, 0.01));
 909         p->push_back (PresetPoint (0.2, 0.03));
 910         p->push_back (PresetPoint (0.8, 0.97));
 911         p->push_back (PresetPoint (0.9, 0.99));
 912         p->push_back (PresetPoint (1, 1));
 913         fade_in_presets->push_back (p);
 914
 915         /* FADE OUT */
 916
 917         // p = new Preset ("hiout.xpm");
 918         p = new Preset ("crossfade_out_fast-cut");
 919         p->push_back (PresetPoint (0, 1));
 920         p->push_back (PresetPoint (0.305556, 1));
 921         p->push_back (PresetPoint (0.548611, 0.991736));
 922         p->push_back (PresetPoint (0.759259, 0.931129));
 923         p->push_back (PresetPoint (0.918981, 0.68595));
 924         p->push_back (PresetPoint (0.976852, 0.22865));
 925         p->push_back (PresetPoint (1, 0));
 926         fade_out_presets->push_back (p);
 927
 928         // p = new Preset ("loout.xpm");
 929         p = new Preset ("crossfade_out_transition");
 930         p->push_back (PresetPoint (0, 1));
 931         p->push_back (PresetPoint (0.023041, 0.697222));
 932         p->push_back (PresetPoint (0.0553,   0.483333));
 933         p->push_back (PresetPoint (0.170507, 0.233333));
 934         p->push_back (PresetPoint (0.370968, 0.0861111));
 935         p->push_back (PresetPoint (0.610599, 0.0333333));
 936         p->push_back (PresetPoint (1, 0));
 937         fade_out_presets->push_back (p);
 938
 939         // p = new Preset ("regout.xpm");
 940         p = new Preset ("crossfade_out_constant");
 941         p->push_back (PresetPoint (0, 1));
 942         p->push_back (PresetPoint (0.228111, 0.988889));
 943         p->push_back (PresetPoint (0.347926, 0.972222));
 944         p->push_back (PresetPoint (0.529954, 0.886111));
 945         p->push_back (PresetPoint (0.753456, 0.658333));
 946         p->push_back (PresetPoint (0.9262673, 0.308333));
 947         p->push_back (PresetPoint (1, 0));
 948         fade_out_presets->push_back (p);
 949
 950         // p = new Preset ("regout2.xpm");
 951         p = new Preset ("crossfade_out_slow-fade");
 952         p->push_back (PresetPoint (0, 1));
 953         p->push_back (PresetPoint (0.080645, 0.730556));
 954         p->push_back (PresetPoint (0.277778, 0.289256));
 955         p->push_back (PresetPoint (0.470046, 0.152778));
 956         p->push_back (PresetPoint (0.695853, 0.0694444));
 957         p->push_back (PresetPoint (1, 0));
 958         fade_out_presets->push_back (p);
 959
 960         // p = new Preset ("linout.xpm");
 961         p = new Preset ("crossfade_out_dipped");
 962         p->push_back (PresetPoint (0, 1));
 963         p->push_back (PresetPoint (1, 0));
 964         fade_out_presets->push_back (p);
 965
 966         p = new Preset ("crossfade_out_default");
 967         p->push_back (PresetPoint (0, 1));
 968         p->push_back (PresetPoint (0.1, 0.99));
 969         p->push_back (PresetPoint (0.2, 0.97));
 970         p->push_back (PresetPoint (0.8, 0.03));
 971         p->push_back (PresetPoint (0.9, 0.01));
 972         p->push_back (PresetPoint (1, 0));
 973         fade_out_presets->push_back (p);
 974 }
 975
 976 void
 977 CrossfadeEditor::curve_select_clicked (WhichFade wf)
 978 {
 979         current = wf;
 980
 981         if (wf == In) {
 982
 983                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[In].waves.begin(); i != fade[In].waves.end(); ++i) {
 984                         (*i)->property_wave_color() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
 985                         (*i)->property_fill_color() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
 986                 }
 987
 988                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[Out].waves.begin(); i != fade[Out].waves.end(); ++i) {
 989                         (*i)->property_wave_color() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
 990                         (*i)->property_fill_color() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
 991                 }
 992
 993                 fade[In].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorLine.get();
 994                 fade[Out].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLine.get();
 995                 fade[Out].shading->hide();
 996                 fade[In].shading->show();
 997
 998                 for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 999                         (*i)->box->hide();
1000                 }
1001
1002                 for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
1003                         (*i)->box->show ();
1004                 }
1005
1006         } else {
1007
1008                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[In].waves.begin(); i != fade[In].waves.end(); ++i) {
1009                         (*i)->property_wave_color() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
1010                         (*i)->property_fill_color() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
1011                 }
1012
1013                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[Out].waves.begin(); i != fade[Out].waves.end(); ++i) {
1014                         (*i)->property_wave_color() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
1015                         (*i)->property_fill_color() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
1016                 }
1017
1018                 fade[Out].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorLine.get();
1019                 fade[In].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLine.get();
1020                 fade[In].shading->hide();
1021                 fade[Out].shading->show();
1022
1023                 for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
1024                         (*i)->box->hide();
1025                 }
1026
1027                 for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
1028                         (*i)->box->show();
1029                 }
1030
1031         }
1032 }
1033
1034 double
1035 CrossfadeEditor::x_coordinate (double& xfract) const
1036 {
1037         xfract = min (1.0, xfract);
1038         xfract = max (0.0, xfract);
1039
1040         return canvas_border + (xfract * effective_width());
1041 }
1042
1043 double
1044 CrossfadeEditor::y_coordinate (double& yfract) const
1045 {
1046         yfract = min (1.0, yfract);
1047         yfract = max (0.0, yfract);
1048
1049         return (canvas->get_allocation().get_height() - (canvas_border)) - (yfract * effective_height());
1050 }
1051
1052 void
1053 CrossfadeEditor::make_waves (boost::shared_ptr<AudioRegion> region, WhichFade which)
1054 {
1055         gdouble ht;
1056         uint32_t nchans = region->n_channels();
1057         guint32 color;
1058         double spu;
1059
1060         if (which == In) {
1061                 color = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
1062         } else {
1063                 color = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
1064         }
1065
1066         ht = canvas->get_allocation().get_height() / (double) nchans;
1067         spu = xfade->length() / (double) effective_width();
1068
1069         for (uint32_t n = 0; n < nchans; ++n) {
1070
1071                 gdouble yoff = n * ht;
1072
1073                 if (region->audio_source(n)->peaks_ready (bind (mem_fun(*this, &CrossfadeEditor::peaks_ready), region, which), peaks_ready_connection)) {
1074                         WaveView* waveview = new WaveView (*(canvas->root()));
1075
1076                         waveview->property_data_src() = region.get();
1077                         waveview->property_cache_updater() =  true;
1078                         waveview->property_cache() = WaveView::create_cache();
1079                         waveview->property_channel() = n;
1080                         waveview->property_length_function() = (void*) region_length_from_c;
1081                         waveview->property_sourcefile_length_function() = (void*) sourcefile_length_from_c;
1082                         waveview->property_peak_function() = (void*) region_read_peaks_from_c;
1083                         waveview->property_gain_function() = (void*) curve_get_vector_from_c;
1084                         waveview->property_gain_src() = &fade[which].gain_curve;
1085                         waveview->property_x() = canvas_border;
1086                         waveview->property_y() = yoff;
1087                         waveview->property_height() = ht;
1088                         waveview->property_samples_per_unit() = spu;
1089                         waveview->property_amplitude_above_axis() = 2.0;
1090                         waveview->property_wave_color() = color;
1091                         waveview->property_fill_color() = color;
1092
1093                         if (which==In)
1094                                 waveview->property_region_start() = region->start();
1095                         else
1096                                 waveview->property_region_start() = region->start()+region->length()-xfade->length();
1097
1098                         waveview->lower_to_bottom();
1099                         fade[which].waves.push_back (waveview);
1100                 }
1101         }
1102
1103         toplevel->lower_to_bottom();
1104 }
1105
1106 void
1107 CrossfadeEditor::peaks_ready (boost::shared_ptr<AudioRegion> r, WhichFade which)
1108 {
1109         /* this should never be called, because the peak files for an xfade
1110            will be ready by the time we want them. but our API forces us
1111            to provide this, so ..
1112         */
1113         peaks_ready_connection.disconnect ();
1114         make_waves (r, which);
1115 }
1116
1117 void
1118 CrossfadeEditor::audition (Audition which)
1119 {
1120         AudioPlaylist& pl (session.the_auditioner()->prepare_playlist());
1121         nframes_t preroll;
1122         nframes_t postroll;
1123         nframes_t left_start_offset;
1124         nframes_t right_length;
1125         nframes_t left_length;
1126
1127         if (which != Right && preroll_button.get_active()) {
1128                 preroll = session.frame_rate() * 2;  //2 second hardcoded preroll for now
1129         } else {
1130                 preroll = 0;
1131         }
1132
1133         if (which != Left && postroll_button.get_active()) {
1134                 postroll = session.frame_rate() * 2;  //2 second hardcoded postroll for now
1135         } else {
1136                 postroll = 0;
1137         }
1138
1139         // Is there enough data for the whole preroll?
1140         left_length = xfade->length();
1141         if ((left_start_offset = xfade->out()->length() - xfade->length()) > preroll) {
1142                 left_start_offset -= preroll;
1143         } else {
1144                 preroll = left_start_offset;
1145                 left_start_offset = 0;
1146         }
1147         left_length += preroll;
1148
1149         // Is there enough data for the whole postroll?
1150         right_length = xfade->length();
1151         if ((xfade->in()->length() - right_length) > postroll) {
1152                 right_length += postroll;
1153         } else {
1154                 right_length = xfade->in()->length();
1155         }
1156
1157         boost::shared_ptr<AudioRegion> left (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->out(), left_start_offset, left_length, "xfade out",
1158                                                                                                               0, Region::DefaultFlags, false)));
1159         boost::shared_ptr<AudioRegion> right (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->in(), 0, right_length, "xfade in",
1160                                                                                                                0, Region::DefaultFlags, false)));
1161
1162         //apply a 20ms declicking fade at the start and end of auditioning
1163         left->set_fade_in_active(true);
1164         left->set_fade_in_length(session.frame_rate() / 50);
1165         right->set_fade_out_active(true);
1166         right->set_fade_out_length(session.frame_rate() / 50);
1167
1168         pl.add_region (left, 0);
1169         pl.add_region (right, 1 + preroll);
1170
1171         if (which == Left) {
1172                 right->set_scale_amplitude (0.0);
1173         } else if (which == Right) {
1174                 left->set_scale_amplitude (0.0);
1175         }
1176
1177         /* there is only one ... */
1178         pl.foreach_crossfade (this, &CrossfadeEditor::setup);
1179
1180         session.audition_playlist ();
1181 }
1182
1183 void
1184 CrossfadeEditor::audition_both ()
1185 {
1186         audition (Both);
1187 }
1188
1189 void
1190 CrossfadeEditor::audition_left_dry ()
1191 {
1192         boost::shared_ptr<AudioRegion> left (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->out(), xfade->out()->length() - xfade->length(), xfade->length(), "xfade left",
1193                                                                                                               0, Region::DefaultFlags, false)));
1194
1195         session.audition_region (left);
1196 }
1197
1198 void
1199 CrossfadeEditor::audition_left ()
1200 {
1201         audition (Left);
1202 }
1203
1204 void
1205 CrossfadeEditor::audition_right_dry ()
1206 {
1207         boost::shared_ptr<AudioRegion> right (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->in(), 0, xfade->length(), "xfade in",
1208                                                                                                                0, Region::DefaultFlags, false)));
1209         session.audition_region (right);
1210 }
1211
1212 void
1213 CrossfadeEditor::audition_right ()
1214 {
1215         audition (Right);
1216 }
1217
1218 void
1219 CrossfadeEditor::cancel_audition ()
1220 {
1221         session.cancel_audition ();
1222 }
1223
1224 void
1225 CrossfadeEditor::audition_toggled ()
1226 {
1227         bool x;
1228
1229         if ((x = audition_both_button.get_active ()) != session.is_auditioning()) {
1230
1231                 if (x) {
1232                         audition_both ();
1233                 } else {
1234                         cancel_audition ();
1235                 }
1236         }
1237 }
1238
1239 void
1240 CrossfadeEditor::audition_right_toggled ()
1241 {
1242         bool x;
1243
1244         if ((x = audition_right_button.get_active ()) != session.is_auditioning()) {
1245
1246                 if (x) {
1247                         audition_right ();
1248                 } else {
1249                         cancel_audition ();
1250                 }
1251         }
1252 }
1253
1254 void
1255 CrossfadeEditor::audition_right_dry_toggled ()
1256 {
1257         bool x;
1258
1259         if ((x = audition_right_dry_button.get_active ()) != session.is_auditioning()) {
1260
1261                 if (x) {
1262                         audition_right_dry ();
1263                 } else {
1264                         cancel_audition ();
1265                 }
1266         }
1267 }
1268
1269 void
1270 CrossfadeEditor::audition_left_toggled ()
1271 {
1272         bool x;
1273
1274         if ((x = audition_left_button.get_active ()) != session.is_auditioning()) {
1275
1276                 if (x) {
1277                         audition_left ();
1278                 } else {
1279                         cancel_audition ();
1280                 }
1281         }
1282 }
1283
1284 void
1285 CrossfadeEditor::audition_left_dry_toggled ()
1286 {
1287         bool x;
1288
1289         if ((x = audition_left_dry_button.get_active ()) != session.is_auditioning()) {
1290
1291                 if (x) {
1292                         audition_left_dry ();
1293                 } else {
1294                         cancel_audition ();
1295                 }
1296         }
1297 }