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_event.h>
  31 #include <ardour/curve.h>
  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 #include <ardour/profile.h>
  40
  41 #include <gtkmm2ext/gtk_ui.h>
  42
  43 #include "ardour_ui.h"
  44 #include "crossfade_edit.h"
  45 #include "rgb_macros.h"
  46 #include "keyboard.h"
  47 #include "utils.h"
  48 #include "gui_thread.h"
  49 #include "canvas_impl.h"
  50 #include "simplerect.h"
  51 #include "waveview.h"
  52 #include "actions.h"
  53
  54 using namespace std;
  55 using namespace ARDOUR;
  56 using namespace PBD;
  57 using namespace Gtk;
  58 using namespace sigc;
  59 using namespace Editing;
  60
  61 #include "i18n.h"
  62
  63 const int32_t CrossfadeEditor::Point::size = 7;
  64 const double CrossfadeEditor::canvas_border = 10;
  65 CrossfadeEditor::Presets* CrossfadeEditor::fade_in_presets = 0;
  66 CrossfadeEditor::Presets* CrossfadeEditor::fade_out_presets = 0;
  67
  68 CrossfadeEditor::Half::Half ()
  69         : line (0),
  70           normative_curve (0.0, 1.0, 1.0, true),
  71           gain_curve (0.0, 2.0, 1.0, true)
  72 {
  73 }
  74
  75 CrossfadeEditor::CrossfadeEditor (Session& s, boost::shared_ptr<Crossfade> xf, double my, double mxy)
  76         : ArdourDialog (_("ardour: x-fade edit")),
  77           xfade (xf),
  78           session (s),
  79           clear_button (_("Clear")),
  80           revert_button (_("Reset")),
  81           audition_both_button (_("Fade")),
  82           audition_left_dry_button (_("Out (dry)")),
  83           audition_left_button (_("Out")),
  84           audition_right_dry_button (_("In (dry)")),
  85           audition_right_button (_("In")),
  86
  87           preroll_button (_("With Pre-roll")),
  88           postroll_button (_("With Post-roll")),
  89
  90           miny (my),
  91           maxy (mxy),
  92
  93           fade_in_table (3, 3),
  94           fade_out_table (3, 3),
  95
  96           select_in_button (_("Fade In")),
  97           select_out_button (_("Fade Out"))
  98 {
  99         set_wmclass (X_("ardour_automationedit"), "Ardour");
 100         set_name ("CrossfadeEditWindow");
 101         set_position (Gtk::WIN_POS_MOUSE);
 102
 103         add_accel_group (ActionManager::ui_manager->get_accel_group());
 104
 105         add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
 106
 107         RadioButtonGroup sel_but_group = select_in_button.get_group();
 108         select_out_button.set_group (sel_but_group);
 109         select_out_button.set_mode (false);
 110         select_in_button.set_mode (false);
 111
 112         get_action_area()->set_layout(BUTTONBOX_SPREAD);
 113         get_action_area()->pack_start(clear_button);
 114         get_action_area()->pack_start(revert_button);
 115         cancel_button = add_button ("Cancel", RESPONSE_CANCEL);
 116         ok_button = add_button ("OK", RESPONSE_ACCEPT);
 117
 118         if (fade_in_presets == 0) {
 119                 build_presets ();
 120         }
 121
 122         point_grabbed = false;
 123         toplevel = 0;
 124
 125         canvas = new ArdourCanvas::CanvasAA ();
 126         canvas->signal_size_allocate().connect (mem_fun(*this, &CrossfadeEditor::canvas_allocation));
 127         canvas->set_size_request (425, 200);
 128
 129         toplevel = new ArdourCanvas::SimpleRect (*(canvas->root()));
 130         toplevel->property_x1() =  0.0;
 131         toplevel->property_y1() =  0.0;
 132         toplevel->property_x2() =  10.0;
 133         toplevel->property_y2() =  10.0;
 134         toplevel->property_fill() =  true;
 135         toplevel->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorBase.get();
 136         toplevel->property_outline_pixels() =  0;
 137         toplevel->signal_event().connect (mem_fun (*this, &CrossfadeEditor::canvas_event));
 138
 139         fade[Out].line = new ArdourCanvas::Line (*(canvas->root()));
 140         fade[Out].line->property_width_pixels() = 1;
 141         fade[Out].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLine.get();
 142
 143         fade[Out].shading = new ArdourCanvas::Polygon (*(canvas->root()));
 144         fade[Out].shading->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLineShading.get();
 145
 146         fade[In].line = new ArdourCanvas::Line (*(canvas->root()));
 147         fade[In].line->property_width_pixels() = 1;
 148         fade[In].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLine.get();
 149
 150         fade[In].shading = new ArdourCanvas::Polygon (*(canvas->root()));
 151         fade[In].shading->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLineShading.get();
 152
 153         fade[In].shading->signal_event().connect (mem_fun (*this, &CrossfadeEditor::canvas_event));
 154         fade[In].line->signal_event().connect (mem_fun (*this, &CrossfadeEditor::curve_event));
 155         fade[Out].shading->signal_event().connect (mem_fun (*this, &CrossfadeEditor::canvas_event));
 156         fade[Out].line->signal_event().connect (mem_fun (*this, &CrossfadeEditor::curve_event));
 157
 158         select_in_button.set_name (X_("CrossfadeEditCurveButton"));
 159         select_out_button.set_name (X_("CrossfadeEditCurveButton"));
 160
 161         select_in_button.signal_clicked().connect (bind (mem_fun (*this, &CrossfadeEditor::curve_select_clicked), In));
 162         select_out_button.signal_clicked().connect (bind (mem_fun (*this, &CrossfadeEditor::curve_select_clicked), Out));
 163
 164         HBox* acbox = manage (new HBox);
 165
 166         audition_box.set_border_width (7);
 167         audition_box.set_spacing (5);
 168         audition_box.set_homogeneous (false);
 169         audition_box.pack_start (audition_left_dry_button, false, false);
 170         audition_box.pack_start (audition_left_button, false, false);
 171         audition_box.pack_start (audition_both_button, false, false);
 172         audition_box.pack_start (audition_right_button, false, false);
 173         audition_box.pack_start (audition_right_dry_button, false, false);
 174
 175         Frame* audition_frame = manage (new Frame (_("Audition")));
 176
 177         audition_frame->set_name (X_("CrossfadeEditFrame"));
 178         audition_frame->add (audition_box);
 179
 180         acbox->pack_start (*audition_frame, true, false);
 181
 182         Frame* canvas_frame = manage (new Frame);
 183         canvas_frame->add (*canvas);
 184         canvas_frame->set_shadow_type (Gtk::SHADOW_IN);
 185
 186         fade_in_table.attach (select_in_button, 0, 2, 0, 1, Gtk::FILL|Gtk::EXPAND);
 187         fade_out_table.attach (select_out_button, 0, 2, 0, 1, Gtk::FILL|Gtk::EXPAND);
 188
 189         Image *pxmap;
 190         Button* pbutton;
 191         int row;
 192         int col;
 193
 194         row = 1;
 195         col = 0;
 196
 197         for (list<Preset*>::iterator i = fade_in_presets->begin(); i != fade_in_presets->end(); ++i) {
 198
 199                 pxmap = manage (new Image (::get_icon ((*i)->image_name)));
 200                 pbutton = manage (new Button);
 201                 pbutton->add (*pxmap);
 202                 pbutton->set_name ("CrossfadeEditButton");
 203                 pbutton->signal_clicked().connect (bind (mem_fun(*this, &CrossfadeEditor::apply_preset), *i));
 204                 ARDOUR_UI::instance()->set_tip (pbutton, (*i)->name, "");
 205                 fade_in_table.attach (*pbutton, col, col+1, row, row+1);
 206                 fade_in_buttons.push_back (pbutton);
 207
 208                 col++;
 209
 210                 if (col == 2) {
 211                         col = 0;
 212                         row++;
 213                 }
 214         }
 215
 216         row = 1;
 217         col = 0;
 218
 219         for (list<Preset*>::iterator i = fade_out_presets->begin(); i != fade_out_presets->end(); ++i) {
 220
 221                 pxmap = manage (new Image (::get_icon ((*i)->image_name)));
 222                 pbutton = manage (new Button);
 223                 pbutton->add (*pxmap);
 224                 pbutton->set_name ("CrossfadeEditButton");
 225                 pbutton->signal_clicked().connect (bind (mem_fun(*this, &CrossfadeEditor::apply_preset), *i));
 226                 ARDOUR_UI::instance()->set_tip (pbutton, (*i)->name, "");
 227                 fade_out_table.attach (*pbutton, col, col+1, row, row+1);
 228                 fade_out_buttons.push_back (pbutton);
 229
 230                 col++;
 231
 232                 if (col == 2) {
 233                         col = 0;
 234                         row++;
 235                 }
 236         }
 237
 238         clear_button.set_name ("CrossfadeEditButton");
 239         revert_button.set_name ("CrossfadeEditButton");
 240         ok_button->set_name ("CrossfadeEditButton");
 241         cancel_button->set_name ("CrossfadeEditButton");
 242         preroll_button.set_name ("CrossfadeEditButton");
 243         postroll_button.set_name ("CrossfadeEditButton");
 244         audition_both_button.set_name ("CrossfadeEditAuditionButton");
 245         audition_left_dry_button.set_name ("CrossfadeEditAuditionButton");
 246         audition_left_button.set_name ("CrossfadeEditAuditionButton");
 247         audition_right_dry_button.set_name ("CrossfadeEditAuditionButton");
 248         audition_right_button.set_name ("CrossfadeEditAuditionButton");
 249
 250         clear_button.signal_clicked().connect (mem_fun(*this, &CrossfadeEditor::clear));
 251         revert_button.signal_clicked().connect (mem_fun(*this, &CrossfadeEditor::reset));
 252         audition_both_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_toggled));
 253         audition_right_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_right_toggled));
 254         audition_right_dry_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_right_dry_toggled));
 255         audition_left_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_left_toggled));
 256         audition_left_dry_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_left_dry_toggled));
 257
 258         roll_box.pack_start (preroll_button, false, false);
 259         roll_box.pack_start (postroll_button, false, false);
 260
 261         Gtk::HBox* rcenter_box = manage (new HBox);
 262         rcenter_box->pack_start (roll_box, true, false);
 263
 264         VBox* vpacker2 = manage (new (VBox));
 265
 266         vpacker2->set_border_width (12);
 267         vpacker2->set_spacing (7);
 268         vpacker2->pack_start (*acbox, false, false);
 269         vpacker2->pack_start (*rcenter_box, false, false);
 270
 271         curve_button_box.set_spacing (7);
 272         curve_button_box.pack_start (fade_out_table, false, false, 12);
 273         curve_button_box.pack_start (*vpacker2, false, false, 12);
 274         curve_button_box.pack_start (fade_in_table, false, false, 12);
 275
 276         get_vbox()->pack_start (*canvas_frame, true, true);
 277         get_vbox()->pack_start (curve_button_box, false, false);
 278
 279         /* button to allow hackers to check the actual curve values */
 280
 281 //      Button* foobut = manage (new Button ("dump"));
 282 //      foobut-.signal_clicked().connect (mem_fun(*this, &CrossfadeEditor::dump));
 283 //      vpacker.pack_start (*foobut, false, false);
 284
 285         current = In;
 286         set (xfade->fade_in(), In);
 287
 288         current = Out;
 289         set (xfade->fade_out(), Out);
 290
 291         curve_select_clicked (In);
 292
 293         xfade->StateChanged.connect (mem_fun(*this, &CrossfadeEditor::xfade_changed));
 294
 295         session.AuditionActive.connect (mem_fun(*this, &CrossfadeEditor::audition_state_changed));
 296         show_all_children();
 297 }
 298
 299 CrossfadeEditor::~CrossfadeEditor()
 300 {
 301         /* most objects will be destroyed when the toplevel window is. */
 302
 303         for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 304                 delete *i;
 305         }
 306
 307         for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 308                 delete *i;
 309         }
 310 }
 311
 312 void
 313 CrossfadeEditor::dump ()
 314 {
 315         for (AutomationList::iterator i = fade[Out].normative_curve.begin(); i != fade[Out].normative_curve.end(); ++i) {
 316                 cerr << (*i)->when << ' ' << (*i)->value << endl;
 317         }
 318 }
 319
 320 void
 321 CrossfadeEditor::audition_state_changed (bool yn)
 322 {
 323         ENSURE_GUI_THREAD (bind (mem_fun(*this, &CrossfadeEditor::audition_state_changed), yn));
 324
 325         if (!yn) {
 326                 audition_both_button.set_active (false);
 327                 audition_left_button.set_active (false);
 328                 audition_right_button.set_active (false);
 329                 audition_left_dry_button.set_active (false);
 330                 audition_right_dry_button.set_active (false);
 331         }
 332 }
 333
 334 void
 335 CrossfadeEditor::set (const ARDOUR::Curve& curve, WhichFade which)
 336 {
 337         double firstx, endx;
 338         ARDOUR::Curve::const_iterator the_end;
 339
 340         for (list<Point*>::iterator i = fade[which].points.begin(); i != fade[which].points.end(); ++i) {
 341                         delete *i;
 342         }
 343
 344         fade[which].points.clear ();
 345         fade[which].gain_curve.clear ();
 346         fade[which].normative_curve.clear ();
 347
 348         if (curve.empty()) {
 349                 goto out;
 350         }
 351
 352         the_end = curve.const_end();
 353         --the_end;
 354
 355         firstx = (*curve.const_begin())->when;
 356         endx = (*the_end)->when;
 357
 358         for (ARDOUR::Curve::const_iterator i = curve.const_begin(); i != curve.const_end(); ++i) {
 359
 360                 double xfract = ((*i)->when - firstx) / (endx - firstx);
 361                 double yfract = ((*i)->value - miny) / (maxy - miny);
 362
 363                 Point* p = make_point ();
 364
 365                 p->move_to (x_coordinate (xfract), y_coordinate (yfract),
 366                             xfract, yfract);
 367
 368                 fade[which].points.push_back (p);
 369         }
 370
 371         /* no need to sort because curve is already time-ordered */
 372
 373   out:
 374
 375         swap (which, current);
 376         redraw ();
 377         swap (which, current);
 378 }
 379
 380 bool
 381 CrossfadeEditor::curve_event (GdkEvent* event)
 382 {
 383         /* treat it like a toplevel event */
 384
 385         return canvas_event (event);
 386 }
 387
 388 bool
 389 CrossfadeEditor::point_event (GdkEvent* event, Point* point)
 390 {
 391
 392         if (point->curve != fade[current].line) {
 393                 return FALSE;
 394         }
 395
 396         switch (event->type) {
 397         case GDK_BUTTON_PRESS:
 398                 point_grabbed = true;
 399                 break;
 400         case GDK_BUTTON_RELEASE:
 401                 point_grabbed = false;
 402
 403                 if (Keyboard::is_delete_event (&event->button)) {
 404                         fade[current].points.remove (point);
 405                         delete point;
 406                 }
 407
 408                 redraw ();
 409                 break;
 410
 411         case GDK_MOTION_NOTIFY:
 412                 if (point_grabbed) {
 413                         double new_x, new_y;
 414
 415                         /* can't drag first or last points horizontally */
 416
 417                         if (point == fade[current].points.front() || point == fade[current].points.back()) {
 418                                 new_x = point->x;
 419                         } else {
 420                                 new_x = (event->motion.x - canvas_border)/effective_width();
 421                         }
 422
 423                         new_y = 1.0 - ((event->motion.y - canvas_border)/effective_height());
 424                         point->move_to (x_coordinate (new_x), y_coordinate (new_y),
 425                                         new_x, new_y);
 426                         redraw ();
 427                 }
 428                 break;
 429         default:
 430                 break;
 431         }
 432         return TRUE;
 433 }
 434
 435 bool
 436 CrossfadeEditor::canvas_event (GdkEvent* event)
 437 {
 438         switch (event->type) {
 439         case GDK_BUTTON_PRESS:
 440                 add_control_point ((event->button.x - canvas_border)/effective_width(),
 441                                    1.0 - ((event->button.y - canvas_border)/effective_height()));
 442                 return TRUE;
 443                 break;
 444         default:
 445                 break;
 446         }
 447         return FALSE;
 448 }
 449
 450 CrossfadeEditor::Point::~Point()
 451 {
 452         delete box;
 453 }
 454
 455 CrossfadeEditor::Point*
 456 CrossfadeEditor::make_point ()
 457 {
 458         Point* p = new Point;
 459
 460         p->box = new ArdourCanvas::SimpleRect (*(canvas->root()));
 461         p->box->property_fill() = true;
 462         p->box->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorPointFill.get();
 463         p->box->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorPointOutline.get();
 464         p->box->property_outline_pixels() = 1;
 465
 466         p->curve = fade[current].line;
 467
 468         p->box->signal_event().connect (bind (mem_fun (*this, &CrossfadeEditor::point_event), p));
 469
 470         return p;
 471 }
 472
 473 void
 474 CrossfadeEditor::add_control_point (double x, double y)
 475 {
 476         PointSorter cmp;
 477
 478         /* enforce end point x location */
 479
 480         if (fade[current].points.empty()) {
 481                 x = 0.0;
 482         } else if (fade[current].points.size() == 1) {
 483                 x = 1.0;
 484         }
 485
 486         Point* p = make_point ();
 487
 488         p->move_to (x_coordinate (x), y_coordinate (y), x, y);
 489
 490         fade[current].points.push_back (p);
 491         fade[current].points.sort (cmp);
 492
 493         redraw ();
 494 }
 495
 496 void
 497 CrossfadeEditor::Point::move_to (double nx, double ny, double xfract, double yfract)
 498 {
 499         if ( xfract < 0.0 ) {
 500                 xfract = 0.0;
 501         } else if ( xfract > 1.0 ) {
 502                 xfract = 1.0;
 503         }
 504
 505         if ( yfract < 0.0 ) {
 506                 yfract = 0.0;
 507         } else if ( yfract > 1.0 ) {
 508                 yfract = 1.0;
 509         }
 510
 511         const double half_size = rint(size/2.0);
 512         double x1 = nx - half_size;
 513         double x2 = nx + half_size;
 514
 515         box->property_x1() = x1;
 516         box->property_x2() = x2;
 517
 518         box->property_y1() = ny - half_size;
 519         box->property_y2() = ny + half_size;
 520
 521         x = xfract;
 522         y = yfract;
 523 }
 524
 525 void
 526 CrossfadeEditor::canvas_allocation (Gtk::Allocation& alloc)
 527 {
 528         if (toplevel) {
 529                 toplevel->property_x1() = 0.0;
 530                 toplevel->property_y1() = 0.0;
 531                 toplevel->property_x2() = (double) canvas->get_allocation().get_width() + canvas_border;
 532                 toplevel->property_y2() = (double) canvas->get_allocation().get_height() + canvas_border;
 533         }
 534
 535         canvas->set_scroll_region (0.0, 0.0,
 536                                    canvas->get_allocation().get_width(),
 537                                    canvas->get_allocation().get_height());
 538
 539         Point* end = make_point ();
 540         PointSorter cmp;
 541
 542         if (fade[In].points.size() > 1) {
 543                 Point* old_end = fade[In].points.back();
 544                 fade[In].points.pop_back ();
 545                 end->move_to (x_coordinate (old_end->x),
 546                               y_coordinate (old_end->y),
 547                               old_end->x, old_end->y);
 548                 delete old_end;
 549         } else {
 550                 double x = 1.0;
 551                 double y = 0.5;
 552                 end->move_to (x_coordinate (x), y_coordinate (y), x, y);
 553
 554         }
 555
 556         fade[In].points.push_back (end);
 557         fade[In].points.sort (cmp);
 558
 559         for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 560                 (*i)->move_to (x_coordinate((*i)->x), y_coordinate((*i)->y),
 561                                (*i)->x, (*i)->y);
 562         }
 563
 564         end = make_point ();
 565
 566         if (fade[Out].points.size() > 1) {
 567                 Point* old_end = fade[Out].points.back();
 568                 fade[Out].points.pop_back ();
 569                 end->move_to (x_coordinate (old_end->x),
 570                               y_coordinate (old_end->y),
 571                               old_end->x, old_end->y);
 572                 delete old_end;
 573         } else {
 574                 double x = 1.0;
 575                 double y = 0.5;
 576                 end->move_to (x_coordinate (x), y_coordinate (y), x, y);
 577
 578         }
 579
 580         fade[Out].points.push_back (end);
 581         fade[Out].points.sort (cmp);
 582
 583         for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 584                 (*i)->move_to (x_coordinate ((*i)->x),
 585                                y_coordinate ((*i)->y),
 586                                (*i)->x, (*i)->y);
 587         }
 588
 589         WhichFade old_current = current;
 590         current = In;
 591         redraw ();
 592         current = Out;
 593         redraw ();
 594         current = old_current;
 595
 596         double spu = xfade->length() / (double) effective_width();
 597
 598         if (fade[In].waves.empty()) {
 599                 make_waves (xfade->in(), In);
 600         }
 601
 602         if (fade[Out].waves.empty()) {
 603                 make_waves (xfade->out(), Out);
 604         }
 605
 606         double ht;
 607         vector<ArdourCanvas::WaveView*>::iterator i;
 608         uint32_t n;
 609
 610         ht = canvas->get_allocation().get_height() / xfade->in()->n_channels();
 611
 612         for (n = 0, i = fade[In].waves.begin(); i != fade[In].waves.end(); ++i, ++n) {
 613                 double yoff;
 614
 615                 yoff = n * ht;
 616
 617                 (*i)->property_y() = yoff;
 618                 (*i)->property_height() = ht;
 619                 (*i)->property_samples_per_unit() = spu;
 620         }
 621
 622         ht = canvas->get_allocation().get_height() / xfade->out()->n_channels();
 623
 624         for (n = 0, i = fade[Out].waves.begin(); i != fade[Out].waves.end(); ++i, ++n) {
 625                 double yoff;
 626
 627                 yoff = n * ht;
 628
 629                 (*i)->property_y() = yoff;
 630                 (*i)->property_height() = ht;
 631                 (*i)->property_samples_per_unit() = spu;
 632         }
 633
 634 }
 635
 636
 637 void
 638 CrossfadeEditor::xfade_changed (Change ignored)
 639 {
 640         set (xfade->fade_in(), In);
 641         set (xfade->fade_out(), Out);
 642 }
 643
 644 void
 645 CrossfadeEditor::redraw ()
 646 {
 647         if (canvas->get_allocation().get_width() < 2) {
 648                 return;
 649         }
 650
 651         nframes_t len = xfade->length ();
 652
 653         fade[current].normative_curve.clear ();
 654         fade[current].gain_curve.clear ();
 655
 656         for (list<Point*>::iterator i = fade[current].points.begin(); i != fade[current].points.end(); ++i) {
 657                 fade[current].normative_curve.add ((*i)->x, (*i)->y);
 658                 double offset;
 659                 if (current==In)
 660                         offset = xfade->in()->start();
 661                 else
 662                         offset = xfade->out()->start()+xfade->out()->length()-xfade->length();
 663                 fade[current].gain_curve.add (((*i)->x * len) + offset, (*i)->y);
 664         }
 665
 666
 667         size_t npoints = (size_t) effective_width();
 668         float vec[npoints];
 669
 670         fade[current].normative_curve.get_vector (0, 1.0, vec, npoints);
 671
 672         ArdourCanvas::Points pts;
 673         ArdourCanvas::Points spts;
 674
 675         while (pts.size() < npoints) {
 676                 pts.push_back (Gnome::Art::Point (0,0));
 677         }
 678
 679         while (spts.size() < npoints + 3) {
 680                 spts.push_back (Gnome::Art::Point (0,0));
 681         }
 682
 683         /* the shade coordinates *MUST* be in anti-clockwise order.
 684          */
 685
 686         if (current == In) {
 687
 688                 /* lower left */
 689
 690                 spts[0].set_x (canvas_border);
 691                 spts[0].set_y (effective_height() + canvas_border);
 692
 693                 /* lower right */
 694
 695                 spts[1].set_x (effective_width() + canvas_border);
 696                 spts[1].set_y (effective_height() + canvas_border);
 697
 698                 /* upper right */
 699
 700                 spts[2].set_x (effective_width() + canvas_border);
 701                 spts[2].set_y (canvas_border);
 702
 703
 704         } else {
 705
 706                 /*  upper left */
 707
 708                 spts[0].set_x (canvas_border);
 709                 spts[0].set_y (canvas_border);
 710
 711                 /* lower left */
 712
 713                 spts[1].set_x (canvas_border);
 714                 spts[1].set_y (effective_height() + canvas_border);
 715
 716                 /* lower right */
 717
 718                 spts[2].set_x (effective_width() + canvas_border);
 719                 spts[2].set_y (effective_height() + canvas_border);
 720
 721         }
 722
 723         size_t last_spt = (npoints + 3) - 1;
 724
 725         for (size_t i = 0; i < npoints; ++i) {
 726
 727                 double y = vec[i];
 728
 729                 pts[i].set_x (canvas_border + i);
 730                 pts[i].set_y  (y_coordinate (y));
 731
 732                 spts[last_spt - i].set_x (canvas_border + i);
 733                 spts[last_spt - i].set_y (pts[i].get_y());
 734         }
 735
 736         fade[current].line->property_points() = pts;
 737         fade[current].shading->property_points() = spts;
 738
 739         for (vector<ArdourCanvas::WaveView*>::iterator i = fade[current].waves.begin(); i != fade[current].waves.end(); ++i) {
 740                 (*i)->property_gain_src() = &fade[current].gain_curve;
 741         }
 742 }
 743
 744 void
 745 CrossfadeEditor::apply_preset (Preset *preset)
 746 {
 747
 748         WhichFade wf =  find(fade_in_presets->begin(), fade_in_presets->end(), preset) != fade_in_presets->end() ? In : Out;
 749
 750         if (current != wf) {
 751
 752                 if (wf == In) {
 753                         select_in_button.clicked();
 754                 } else {
 755                         select_out_button.clicked();
 756                 }
 757
 758                 curve_select_clicked (wf);
 759         }
 760
 761         for (list<Point*>::iterator i = fade[current].points.begin(); i != fade[current].points.end(); ++i) {
 762                 delete *i;
 763         }
 764
 765         fade[current].points.clear ();
 766
 767         for (Preset::iterator i = preset->begin(); i != preset->end(); ++i) {
 768                 Point* p = make_point ();
 769                 p->move_to (x_coordinate ((*i).x), y_coordinate ((*i).y),
 770                             (*i).x, (*i).y);
 771                 fade[current].points.push_back (p);
 772         }
 773
 774         redraw ();
 775 }
 776
 777 void
 778 CrossfadeEditor::apply ()
 779 {
 780         _apply_to (xfade);
 781 }
 782
 783 void
 784 CrossfadeEditor::_apply_to (boost::shared_ptr<Crossfade> xf)
 785 {
 786         ARDOUR::Curve& in (xf->fade_in());
 787         ARDOUR::Curve& out (xf->fade_out());
 788
 789         /* IN */
 790
 791
 792         ARDOUR::Curve::const_iterator the_end = in.const_end();
 793         --the_end;
 794
 795         double firstx = (*in.begin())->when;
 796         double endx = (*the_end)->when;
 797         double miny = in.get_min_y ();
 798         double maxy = in.get_max_y ();
 799
 800         in.freeze ();
 801         in.clear ();
 802
 803         for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 804
 805                 double when = firstx + ((*i)->x * (endx - firstx));
 806                 double value = (*i)->y; // miny + ((*i)->y * (maxy - miny));
 807                 in.add (when, value);
 808         }
 809
 810         /* OUT */
 811
 812         the_end = out.const_end();
 813         --the_end;
 814
 815         firstx = (*out.begin())->when;
 816         endx = (*the_end)->when;
 817         miny = out.get_min_y ();
 818         maxy = out.get_max_y ();
 819
 820         out.freeze ();
 821         out.clear ();
 822
 823         for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 824
 825                 double when = firstx + ((*i)->x * (endx - firstx));
 826                 double value = (*i)->y; // miny + ((*i)->y * (maxy - miny));
 827                 out.add (when, value);
 828         }
 829
 830         in.thaw ();
 831         out.thaw ();
 832 }
 833
 834 void
 835 CrossfadeEditor::setup (boost::shared_ptr<Crossfade> xfade)
 836 {
 837         _apply_to (xfade);
 838         xfade->set_active (true);
 839         xfade->fade_in().solve ();
 840         xfade->fade_out().solve ();
 841 }
 842
 843 void
 844 CrossfadeEditor::clear ()
 845 {
 846         for (list<Point*>::iterator i = fade[current].points.begin(); i != fade[current].points.end(); ++i) {
 847                 delete *i;
 848         }
 849
 850         fade[current].points.clear ();
 851
 852         redraw ();
 853 }
 854
 855 void
 856 CrossfadeEditor::reset ()
 857 {
 858         set (xfade->fade_in(),  In);
 859         set (xfade->fade_out(), Out);
 860
 861         curve_select_clicked (current);
 862 }
 863
 864 void
 865 CrossfadeEditor::build_presets ()
 866 {
 867         Preset* p;
 868
 869         fade_in_presets = new Presets;
 870         fade_out_presets = new Presets;
 871
 872         /* FADE IN */
 873
 874         p = new Preset ("Linear (-6dB)", "crossfade-in-linear");
 875         p->push_back (PresetPoint (0, 0));
 876         p->push_back (PresetPoint (0.000000, 0.000000));
 877         p->push_back (PresetPoint (0.166667, 0.166366));
 878         p->push_back (PresetPoint (0.333333, 0.332853));
 879         p->push_back (PresetPoint (0.500000, 0.499459));
 880         p->push_back (PresetPoint (0.666667, 0.666186));
 881         p->push_back (PresetPoint (0.833333, 0.833033));
 882         p->push_back (PresetPoint (1.000000, 1.000000));
 883         fade_in_presets->push_back (p);
 884
 885         p = new Preset ("S(1)-curve", "crossfade-in-S1");
 886         p->push_back (PresetPoint (0, 0));
 887         p->push_back (PresetPoint (0.1, 0.01));
 888         p->push_back (PresetPoint (0.2, 0.03));
 889         p->push_back (PresetPoint (0.8, 0.97));
 890         p->push_back (PresetPoint (0.9, 0.99));
 891         p->push_back (PresetPoint (1, 1));
 892         fade_in_presets->push_back (p);
 893
 894         p = new Preset ("S(2)-curve", "crossfade-in-S2");
 895         p->push_back (PresetPoint (0.0, 0.0));
 896         p->push_back (PresetPoint (0.055, 0.222));
 897         p->push_back (PresetPoint (0.163, 0.35));
 898         p->push_back (PresetPoint (0.837, 0.678));
 899         p->push_back (PresetPoint (0.945, 0.783));
 900         p->push_back (PresetPoint (1.0, 1.0));
 901         fade_in_presets->push_back (p);
 902
 903         p = new Preset ("Constant Power (-3dB)", "crossfade-in-constant-power");
 904
 905         p->push_back (PresetPoint (0.000000, 0.000000));
 906         p->push_back (PresetPoint (0.166667, 0.282192));
 907         p->push_back (PresetPoint (0.333333, 0.518174));
 908         p->push_back (PresetPoint (0.500000, 0.707946));
 909         p->push_back (PresetPoint (0.666667, 0.851507));
 910         p->push_back (PresetPoint (0.833333, 0.948859));
 911         p->push_back (PresetPoint (1.000000, 1.000000));
 912
 913         fade_in_presets->push_back (p);
 914
 915         if (!Profile->get_sae()) {
 916
 917                 p = new Preset ("Short cut", "crossfade-in-short-cut");
 918                 p->push_back (PresetPoint (0, 0));
 919                 p->push_back (PresetPoint (0.389401, 0.0333333));
 920                 p->push_back (PresetPoint (0.629032, 0.0861111));
 921                 p->push_back (PresetPoint (0.829493, 0.233333));
 922                 p->push_back (PresetPoint (0.9447, 0.483333));
 923                 p->push_back (PresetPoint (0.976959, 0.697222));
 924                 p->push_back (PresetPoint (1, 1));
 925                 fade_in_presets->push_back (p);
 926
 927                 p = new Preset ("Slow cut", "crossfade-in-slow-cut");
 928                 p->push_back (PresetPoint (0, 0));
 929                 p->push_back (PresetPoint (0.304147, 0.0694444));
 930                 p->push_back (PresetPoint (0.529954, 0.152778));
 931                 p->push_back (PresetPoint (0.725806, 0.333333));
 932                 p->push_back (PresetPoint (0.847926, 0.558333));
 933                 p->push_back (PresetPoint (0.919355, 0.730556));
 934                 p->push_back (PresetPoint (1, 1));
 935                 fade_in_presets->push_back (p);
 936
 937                 p = new Preset ("Fast cut", "crossfade-in-fast-cut");
 938                 p->push_back (PresetPoint (0, 0));
 939                 p->push_back (PresetPoint (0.0737327, 0.308333));
 940                 p->push_back (PresetPoint (0.246544, 0.658333));
 941                 p->push_back (PresetPoint (0.470046, 0.886111));
 942                 p->push_back (PresetPoint (0.652074, 0.972222));
 943                 p->push_back (PresetPoint (0.771889, 0.988889));
 944                 p->push_back (PresetPoint (1, 1));
 945                 fade_in_presets->push_back (p);
 946
 947                 p = new Preset ("Long cut", "crossfade-in-long-cut");
 948                 p->push_back (PresetPoint (0, 0));
 949                 p->push_back (PresetPoint (0.0207373, 0.197222));
 950                 p->push_back (PresetPoint (0.0645161, 0.525));
 951                 p->push_back (PresetPoint (0.152074, 0.802778));
 952                 p->push_back (PresetPoint (0.276498, 0.919444));
 953                 p->push_back (PresetPoint (0.481567, 0.980556));
 954                 p->push_back (PresetPoint (0.767281, 1));
 955                 p->push_back (PresetPoint (1, 1));
 956                 fade_in_presets->push_back (p);
 957         }
 958
 959         /* FADE OUT */
 960
 961         // p = new Preset ("regout.xpm");
 962         p = new Preset ("Linear (-6dB cut)", "crossfade-out-linear");
 963         p->push_back (PresetPoint (0, 1));
 964         p->push_back (PresetPoint (0.000000, 1.000000));
 965         p->push_back (PresetPoint (0.166667, 0.833033));
 966         p->push_back (PresetPoint (0.333333, 0.666186));
 967         p->push_back (PresetPoint (0.500000, 0.499459));
 968         p->push_back (PresetPoint (0.666667, 0.332853));
 969         p->push_back (PresetPoint (0.833333, 0.166366));
 970         p->push_back (PresetPoint (1.000000, 0.000000));
 971         fade_out_presets->push_back (p);
 972
 973         p = new Preset ("S(1)-Curve", "crossfade-out-S1");
 974         p->push_back (PresetPoint (0, 1));
 975         p->push_back (PresetPoint (0.1, 0.99));
 976         p->push_back (PresetPoint (0.2, 0.97));
 977         p->push_back (PresetPoint (0.8, 0.03));
 978         p->push_back (PresetPoint (0.9, 0.01));
 979         p->push_back (PresetPoint (1, 0));
 980         fade_out_presets->push_back (p);
 981
 982         p = new Preset ("S(2)-Curve", "crossfade-out-S2");
 983         p->push_back (PresetPoint (0.0, 1.0));
 984         p->push_back (PresetPoint (0.163, 0.678));
 985         p->push_back (PresetPoint (0.055, 0.783));
 986         p->push_back (PresetPoint (0.837, 0.35));
 987         p->push_back (PresetPoint (0.945, 0.222));
 988         p->push_back (PresetPoint (1.0, 0.0));
 989         fade_out_presets->push_back (p);
 990
 991         // p = new Preset ("linout.xpm");
 992         p = new Preset ("Constant Power (-3dB cut)", "crossfade-out-constant-power");
 993         p->push_back (PresetPoint (0.000000, 1.000000));
 994         p->push_back (PresetPoint (0.166667, 0.948859));
 995         p->push_back (PresetPoint (0.333333, 0.851507));
 996         p->push_back (PresetPoint (0.500000, 0.707946));
 997         p->push_back (PresetPoint (0.666667, 0.518174));
 998         p->push_back (PresetPoint (0.833333, 0.282192));
 999         p->push_back (PresetPoint (1.000000, 0.000000));
1000         fade_out_presets->push_back (p);
1001
1002         if (!Profile->get_sae()) {
1003                 // p = new Preset ("hiout.xpm");
1004                 p = new Preset ("Short cut", "crossfade-out-short-cut");
1005                 p->push_back (PresetPoint (0, 1));
1006                 p->push_back (PresetPoint (0.305556, 1));
1007                 p->push_back (PresetPoint (0.548611, 0.991736));
1008                 p->push_back (PresetPoint (0.759259, 0.931129));
1009                 p->push_back (PresetPoint (0.918981, 0.68595));
1010                 p->push_back (PresetPoint (0.976852, 0.22865));
1011                 p->push_back (PresetPoint (1, 0));
1012                 fade_out_presets->push_back (p);
1013
1014                 p = new Preset ("Slow cut", "crossfade-out-slow-cut");
1015                 p->push_back (PresetPoint (0, 1));
1016                 p->push_back (PresetPoint (0.228111, 0.988889));
1017                 p->push_back (PresetPoint (0.347926, 0.972222));
1018                 p->push_back (PresetPoint (0.529954, 0.886111));
1019                 p->push_back (PresetPoint (0.753456, 0.658333));
1020                 p->push_back (PresetPoint (0.9262673, 0.308333));
1021                 p->push_back (PresetPoint (1, 0));
1022                 fade_out_presets->push_back (p);
1023
1024                 p = new Preset ("Fast cut", "crossfade-out-fast-cut");
1025                 p->push_back (PresetPoint (0, 1));
1026                 p->push_back (PresetPoint (0.080645, 0.730556));
1027                 p->push_back (PresetPoint (0.277778, 0.289256));
1028                 p->push_back (PresetPoint (0.470046, 0.152778));
1029                 p->push_back (PresetPoint (0.695853, 0.0694444));
1030                 p->push_back (PresetPoint (1, 0));
1031                 fade_out_presets->push_back (p);
1032
1033                 // p = new Preset ("loout.xpm");
1034                 p = new Preset ("Long cut", "crossfade-out-long-cut");
1035                 p->push_back (PresetPoint (0, 1));
1036                 p->push_back (PresetPoint (0.023041, 0.697222));
1037                 p->push_back (PresetPoint (0.0553,   0.483333));
1038                 p->push_back (PresetPoint (0.170507, 0.233333));
1039                 p->push_back (PresetPoint (0.370968, 0.0861111));
1040                 p->push_back (PresetPoint (0.610599, 0.0333333));
1041                 p->push_back (PresetPoint (1, 0));
1042                 fade_out_presets->push_back (p);
1043
1044         }
1045 }
1046
1047 void
1048 CrossfadeEditor::curve_select_clicked (WhichFade wf)
1049 {
1050         current = wf;
1051
1052         if (wf == In) {
1053
1054                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[In].waves.begin(); i != fade[In].waves.end(); ++i) {
1055                         (*i)->property_wave_color() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
1056                         (*i)->property_fill_color() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
1057                 }
1058
1059                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[Out].waves.begin(); i != fade[Out].waves.end(); ++i) {
1060                         (*i)->property_wave_color() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
1061                         (*i)->property_fill_color() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
1062                 }
1063
1064                 fade[In].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorLine.get();
1065                 fade[Out].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLine.get();
1066                 fade[Out].shading->hide();
1067                 fade[In].shading->show();
1068
1069                 for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
1070                         (*i)->box->hide();
1071                 }
1072
1073                 for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
1074                         (*i)->box->show ();
1075                 }
1076
1077         } else {
1078
1079                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[In].waves.begin(); i != fade[In].waves.end(); ++i) {
1080                         (*i)->property_wave_color() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
1081                         (*i)->property_fill_color() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
1082                 }
1083
1084                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[Out].waves.begin(); i != fade[Out].waves.end(); ++i) {
1085                         (*i)->property_wave_color() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
1086                         (*i)->property_fill_color() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
1087                 }
1088
1089                 fade[Out].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorLine.get();
1090                 fade[In].line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_CrossfadeEditorLine.get();
1091                 fade[In].shading->hide();
1092                 fade[Out].shading->show();
1093
1094                 for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
1095                         (*i)->box->hide();
1096                 }
1097
1098                 for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
1099                         (*i)->box->show();
1100                 }
1101
1102         }
1103 }
1104
1105 double
1106 CrossfadeEditor::x_coordinate (double& xfract) const
1107 {
1108         xfract = min (1.0, xfract);
1109         xfract = max (0.0, xfract);
1110
1111         return canvas_border + (xfract * effective_width());
1112 }
1113
1114 double
1115 CrossfadeEditor::y_coordinate (double& yfract) const
1116 {
1117         yfract = min (1.0, yfract);
1118         yfract = max (0.0, yfract);
1119
1120         return (canvas->get_allocation().get_height() - (canvas_border)) - (yfract * effective_height());
1121 }
1122
1123 void
1124 CrossfadeEditor::make_waves (boost::shared_ptr<AudioRegion> region, WhichFade which)
1125 {
1126         gdouble ht;
1127         uint32_t nchans = region->n_channels();
1128         guint32 color;
1129         double spu;
1130
1131         if (which == In) {
1132                 color = ARDOUR_UI::config()->canvasvar_SelectedCrossfadeEditorWave.get();
1133         } else {
1134                 color = ARDOUR_UI::config()->canvasvar_CrossfadeEditorWave.get();
1135         }
1136
1137         ht = canvas->get_allocation().get_height() / (double) nchans;
1138         spu = xfade->length() / (double) effective_width();
1139
1140         for (uint32_t n = 0; n < nchans; ++n) {
1141
1142                 gdouble yoff = n * ht;
1143
1144                 if (region->source(n)->peaks_ready (bind (mem_fun(*this, &CrossfadeEditor::peaks_ready), region, which), peaks_ready_connection)) {
1145
1146                         WaveView* waveview = new WaveView (*(canvas->root()));
1147
1148                         waveview->property_data_src() = region.get();
1149                         waveview->property_cache_updater() =  true;
1150                         waveview->property_cache() = WaveView::create_cache();
1151                         waveview->property_channel() = n;
1152                         waveview->property_length_function() = (void*) region_length_from_c;
1153                         waveview->property_sourcefile_length_function() = (void*) sourcefile_length_from_c;
1154                         waveview->property_peak_function() = (void*) region_read_peaks_from_c;
1155                         waveview->property_gain_function() = (void*) curve_get_vector_from_c;
1156                         waveview->property_gain_src() = &fade[which].gain_curve;
1157                         waveview->property_x() = canvas_border;
1158                         waveview->property_y() = yoff;
1159                         waveview->property_height() = ht;
1160                         waveview->property_samples_per_unit() = spu;
1161                         waveview->property_amplitude_above_axis() = 2.0;
1162                         waveview->property_wave_color() = color;
1163                         waveview->property_fill_color() = color;
1164
1165                         if (which==In)
1166                                 waveview->property_region_start() = region->start();
1167                         else
1168                                 waveview->property_region_start() = region->start()+region->length()-xfade->length();
1169
1170                         waveview->lower_to_bottom();
1171                         fade[which].waves.push_back (waveview);
1172                 }
1173         }
1174
1175         toplevel->lower_to_bottom();
1176 }
1177
1178 void
1179 CrossfadeEditor::peaks_ready (boost::shared_ptr<AudioRegion> r, WhichFade which)
1180 {
1181         /* this should never be called, because the peak files for an xfade
1182            will be ready by the time we want them. but our API forces us
1183            to provide this, so ..
1184         */
1185         peaks_ready_connection.disconnect ();
1186         make_waves (r, which);
1187 }
1188
1189 void
1190 CrossfadeEditor::audition (Audition which)
1191 {
1192         AudioPlaylist& pl (session.the_auditioner()->prepare_playlist());
1193         nframes_t preroll;
1194         nframes_t postroll;
1195         nframes_t left_start_offset;
1196         nframes_t right_length;
1197         nframes_t left_length;
1198
1199         if (which != Right && preroll_button.get_active()) {
1200                 preroll = session.frame_rate() * 2;  //2 second hardcoded preroll for now
1201         } else {
1202                 preroll = 0;
1203         }
1204
1205         if (which != Left && postroll_button.get_active()) {
1206                 postroll = session.frame_rate() * 2;  //2 second hardcoded postroll for now
1207         } else {
1208                 postroll = 0;
1209         }
1210
1211         // Is there enough data for the whole preroll?
1212         left_length = xfade->length();
1213         if ((left_start_offset = xfade->out()->length() - xfade->length()) > preroll) {
1214                 left_start_offset -= preroll;
1215         } else {
1216                 preroll = left_start_offset;
1217                 left_start_offset = 0;
1218         }
1219         left_length += preroll;
1220
1221         // Is there enough data for the whole postroll?
1222         right_length = xfade->length();
1223         if ((xfade->in()->length() - right_length) > postroll) {
1224                 right_length += postroll;
1225         } else {
1226                 right_length = xfade->in()->length();
1227         }
1228
1229         boost::shared_ptr<AudioRegion> left (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->out(), left_start_offset, left_length, "xfade out",
1230                                                                                                               0, Region::DefaultFlags, false)));
1231         boost::shared_ptr<AudioRegion> right (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->in(), 0, right_length, "xfade in",
1232                                                                                                                0, Region::DefaultFlags, false)));
1233
1234         //apply a 20ms declicking fade at the start and end of auditioning
1235         left->set_fade_in_active(true);
1236         left->set_fade_in_length(session.frame_rate() / 50);
1237         right->set_fade_out_active(true);
1238         right->set_fade_out_length(session.frame_rate() / 50);
1239
1240         pl.add_region (left, 0);
1241         pl.add_region (right, 1 + preroll);
1242
1243         if (which == Left) {
1244                 right->set_scale_amplitude (0.0);
1245         } else if (which == Right) {
1246                 left->set_scale_amplitude (0.0);
1247         }
1248
1249         /* there is only one ... */
1250         pl.foreach_crossfade (this, &CrossfadeEditor::setup);
1251
1252         session.audition_playlist ();
1253 }
1254
1255 void
1256 CrossfadeEditor::audition_both ()
1257 {
1258         audition (Both);
1259 }
1260
1261 void
1262 CrossfadeEditor::audition_left_dry ()
1263 {
1264         boost::shared_ptr<AudioRegion> left (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->out(), xfade->out()->length() - xfade->length(), xfade->length(), "xfade left",
1265                                                                                                               0, Region::DefaultFlags, false)));
1266
1267         session.audition_region (left);
1268 }
1269
1270 void
1271 CrossfadeEditor::audition_left ()
1272 {
1273         audition (Left);
1274 }
1275
1276 void
1277 CrossfadeEditor::audition_right_dry ()
1278 {
1279         boost::shared_ptr<AudioRegion> right (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->in(), 0, xfade->length(), "xfade in",
1280                                                                                                                0, Region::DefaultFlags, false)));
1281         session.audition_region (right);
1282 }
1283
1284 void
1285 CrossfadeEditor::audition_right ()
1286 {
1287         audition (Right);
1288 }
1289
1290 void
1291 CrossfadeEditor::cancel_audition ()
1292 {
1293         session.cancel_audition ();
1294 }
1295
1296 void
1297 CrossfadeEditor::audition_toggled ()
1298 {
1299         bool x;
1300
1301         if ((x = audition_both_button.get_active ()) != session.is_auditioning()) {
1302
1303                 if (x) {
1304                         audition_both ();
1305                 } else {
1306                         cancel_audition ();
1307                 }
1308         }
1309 }
1310
1311 void
1312 CrossfadeEditor::audition_right_toggled ()
1313 {
1314         bool x;
1315
1316         if ((x = audition_right_button.get_active ()) != session.is_auditioning()) {
1317
1318                 if (x) {
1319                         audition_right ();
1320                 } else {
1321                         cancel_audition ();
1322                 }
1323         }
1324 }
1325
1326 void
1327 CrossfadeEditor::audition_right_dry_toggled ()
1328 {
1329         bool x;
1330
1331         if ((x = audition_right_dry_button.get_active ()) != session.is_auditioning()) {
1332
1333                 if (x) {
1334                         audition_right_dry ();
1335                 } else {
1336                         cancel_audition ();
1337                 }
1338         }
1339 }
1340
1341 void
1342 CrossfadeEditor::audition_left_toggled ()
1343 {
1344         bool x;
1345
1346         if ((x = audition_left_button.get_active ()) != session.is_auditioning()) {
1347
1348                 if (x) {
1349                         audition_left ();
1350                 } else {
1351                         cancel_audition ();
1352                 }
1353         }
1354 }
1355
1356 void
1357 CrossfadeEditor::audition_left_dry_toggled ()
1358 {
1359         bool x;
1360
1361         if ((x = audition_left_dry_button.get_active ()) != session.is_auditioning()) {
1362
1363                 if (x) {
1364                         audition_left_dry ();
1365                 } else {
1366                         cancel_audition ();
1367                 }
1368         }
1369 }
1370
1371 bool
1372 CrossfadeEditor::on_key_press_event (GdkEventKey *ev)
1373 {
1374         return true;
1375 }
1376
1377 bool
1378 CrossfadeEditor::on_key_release_event (GdkEventKey* ev)
1379 {
1380         switch (ev->keyval) {
1381         case GDK_Right:
1382                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
1383                         audition_right_dry_button.set_active (!audition_right_dry_button.get_active());
1384                 } else {
1385                         audition_right_button.set_active (!audition_right_button.get_active());
1386                 }
1387                 break;
1388
1389         case GDK_Left:
1390                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
1391                         audition_left_dry_button.set_active (!audition_left_dry_button.get_active());
1392                 } else {
1393                         audition_left_button.set_active (!audition_left_button.get_active());
1394                 }
1395                 break;
1396
1397         case GDK_space:
1398                 if (session.is_auditioning()) {
1399                         cancel_audition ();
1400                 } else {
1401                         audition_both_button.set_active (!audition_both_button.get_active());
1402                 }
1403                 break;
1404
1405         default:
1406                 break;
1407         }
1408
1409         return true;
1410 }