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     $Id$
  19 */
  20
  21 #include <cmath>
  22
  23 #include <sigc++/bind.h>
  24
  25 #include <gtkmm/frame.h>
  26 #include <gtkmm/image.h>
  27 #include <gtkmm/scrolledwindow.h>
  28
  29 #include <libgnomecanvasmm/line.h>
  30
  31 #include <ardour/automation_event.h>
  32 #include <ardour/curve.h>
  33 #include <ardour/crossfade.h>
  34 #include <ardour/session.h>
  35 #include <ardour/auditioner.h>
  36 #include <ardour/audioplaylist.h>
  37 #include <ardour/audiosource.h>
  38 #include <ardour/playlist_templates.h>
  39 #include <ardour/region_factory.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 "color.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_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
 104
 105         RadioButtonGroup sel_but_group = select_in_button.get_group();
 106         select_out_button.set_group (sel_but_group);
 107         select_out_button.set_mode (false);
 108         select_in_button.set_mode (false);
 109
 110         get_action_area()->set_layout(BUTTONBOX_SPREAD);
 111         get_action_area()->pack_start(clear_button);
 112         get_action_area()->pack_start(revert_button);
 113         cancel_button = add_button ("Cancel", RESPONSE_CANCEL);
 114         ok_button = add_button ("OK", RESPONSE_ACCEPT);
 115
 116         if (fade_in_presets == 0) {
 117                 build_presets ();
 118         }
 119
 120         point_grabbed = false;
 121         toplevel = 0;
 122
 123         canvas = new ArdourCanvas::CanvasAA ();
 124         canvas->signal_size_allocate().connect (mem_fun(*this, &CrossfadeEditor::canvas_allocation));
 125         canvas->set_size_request (425, 200);
 126
 127         toplevel = new ArdourCanvas::SimpleRect (*(canvas->root()));
 128         toplevel->property_x1() =  0.0;
 129         toplevel->property_y1() =  0.0;
 130         toplevel->property_x2() =  10.0;
 131         toplevel->property_y2() =  10.0;
 132         toplevel->property_fill() =  true;
 133         toplevel->property_fill_color_rgba() = color_map[cCrossfadeEditorBase];
 134         toplevel->property_outline_pixels() =  0;
 135         toplevel->signal_event().connect (mem_fun (*this, &CrossfadeEditor::canvas_event));
 136
 137         fade[Out].line = new ArdourCanvas::Line (*(canvas->root()));
 138         fade[Out].line->property_width_pixels() = 1;
 139         fade[Out].line->property_fill_color_rgba() = color_map[cCrossfadeEditorLine];
 140
 141         fade[Out].shading = new ArdourCanvas::Polygon (*(canvas->root()));
 142         fade[Out].shading->property_fill_color_rgba() = color_map[cCrossfadeEditorLineShading];
 143
 144         fade[In].line = new ArdourCanvas::Line (*(canvas->root()));
 145         fade[In].line->property_width_pixels() = 1;
 146         fade[In].line->property_fill_color_rgba() = color_map[cCrossfadeEditorLine];
 147
 148         fade[In].shading = new ArdourCanvas::Polygon (*(canvas->root()));
 149         fade[In].shading->property_fill_color_rgba() = color_map[cCrossfadeEditorLineShading];
 150
 151         fade[In].shading->signal_event().connect (mem_fun (*this, &CrossfadeEditor::canvas_event));
 152         fade[In].line->signal_event().connect (mem_fun (*this, &CrossfadeEditor::curve_event));
 153         fade[Out].shading->signal_event().connect (mem_fun (*this, &CrossfadeEditor::canvas_event));
 154         fade[Out].line->signal_event().connect (mem_fun (*this, &CrossfadeEditor::curve_event));
 155
 156         select_in_button.set_name (X_("CrossfadeEditCurveButton"));
 157         select_out_button.set_name (X_("CrossfadeEditCurveButton"));
 158
 159         select_in_button.signal_clicked().connect (bind (mem_fun (*this, &CrossfadeEditor::curve_select_clicked), In));
 160         select_out_button.signal_clicked().connect (bind (mem_fun (*this, &CrossfadeEditor::curve_select_clicked), Out));
 161
 162         HBox* acbox = manage (new HBox);
 163
 164         audition_box.set_border_width (7);
 165         audition_box.set_spacing (5);
 166         audition_box.set_homogeneous (false);
 167         audition_box.pack_start (audition_left_dry_button, false, false);
 168         audition_box.pack_start (audition_left_button, false, false);
 169         audition_box.pack_start (audition_both_button, false, false);
 170         audition_box.pack_start (audition_right_button, false, false);
 171         audition_box.pack_start (audition_right_dry_button, false, false);
 172
 173         Frame* audition_frame = manage (new Frame (_("Audition")));
 174
 175         audition_frame->set_name (X_("CrossfadeEditFrame"));
 176         audition_frame->add (audition_box);
 177
 178         acbox->pack_start (*audition_frame, true, false);
 179
 180         Frame* canvas_frame = manage (new Frame);
 181         canvas_frame->add (*canvas);
 182         canvas_frame->set_shadow_type (Gtk::SHADOW_IN);
 183
 184         fade_in_table.attach (select_in_button, 0, 2, 0, 1, Gtk::FILL|Gtk::EXPAND);
 185         fade_out_table.attach (select_out_button, 0, 2, 0, 1, Gtk::FILL|Gtk::EXPAND);
 186
 187         Image *pxmap;
 188         Button* pbutton;
 189         int row;
 190         int col;
 191
 192         row = 1;
 193         col = 0;
 194
 195         for (list<Preset*>::iterator i = fade_in_presets->begin(); i != fade_in_presets->end(); ++i) {
 196
 197                 pxmap = manage (new Image (get_xpm((*i)->xpm)));
 198                 pbutton = manage (new Button);
 199                 pbutton->add (*pxmap);
 200                 pbutton->set_name ("CrossfadeEditButton");
 201                 pbutton->signal_clicked().connect (bind (mem_fun(*this, &CrossfadeEditor::apply_preset), *i));
 202                 fade_in_table.attach (*pbutton, col, col+1, row, row+1);
 203                 fade_in_buttons.push_back (pbutton);
 204
 205                 col++;
 206
 207                 if (col == 2) {
 208                         col = 0;
 209                         row++;
 210                 }
 211         }
 212
 213         row = 1;
 214         col = 0;
 215
 216         for (list<Preset*>::iterator i = fade_out_presets->begin(); i != fade_out_presets->end(); ++i) {
 217
 218                 pxmap = manage (new Image (get_xpm((*i)->xpm)));
 219                 pbutton = manage (new Button);
 220                 pbutton->add (*pxmap);
 221                 pbutton->set_name ("CrossfadeEditButton");
 222                 pbutton->signal_clicked().connect (bind (mem_fun(*this, &CrossfadeEditor::apply_preset), *i));
 223                 fade_out_table.attach (*pbutton, col, col+1, row, row+1);
 224                 fade_out_buttons.push_back (pbutton);
 225
 226                 col++;
 227
 228                 if (col == 2) {
 229                         col = 0;
 230                         row++;
 231                 }
 232         }
 233
 234         clear_button.set_name ("CrossfadeEditButton");
 235         revert_button.set_name ("CrossfadeEditButton");
 236         ok_button->set_name ("CrossfadeEditButton");
 237         cancel_button->set_name ("CrossfadeEditButton");
 238         preroll_button.set_name ("CrossfadeEditButton");
 239         postroll_button.set_name ("CrossfadeEditButton");
 240         audition_both_button.set_name ("CrossfadeEditAuditionButton");
 241         audition_left_dry_button.set_name ("CrossfadeEditAuditionButton");
 242         audition_left_button.set_name ("CrossfadeEditAuditionButton");
 243         audition_right_dry_button.set_name ("CrossfadeEditAuditionButton");
 244         audition_right_button.set_name ("CrossfadeEditAuditionButton");
 245
 246         clear_button.signal_clicked().connect (mem_fun(*this, &CrossfadeEditor::clear));
 247         revert_button.signal_clicked().connect (mem_fun(*this, &CrossfadeEditor::reset));
 248         audition_both_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_toggled));
 249         audition_right_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_right_toggled));
 250         audition_right_dry_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_right_dry_toggled));
 251         audition_left_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_left_toggled));
 252         audition_left_dry_button.signal_toggled().connect (mem_fun(*this, &CrossfadeEditor::audition_left_dry_toggled));
 253
 254         roll_box.pack_start (preroll_button, false, false);
 255         roll_box.pack_start (postroll_button, false, false);
 256
 257         Gtk::HBox* rcenter_box = manage (new HBox);
 258         rcenter_box->pack_start (roll_box, true, false);
 259
 260         VBox* vpacker2 = manage (new (VBox));
 261
 262         vpacker2->set_border_width (12);
 263         vpacker2->set_spacing (7);
 264         vpacker2->pack_start (*acbox, false, false);
 265         vpacker2->pack_start (*rcenter_box, false, false);
 266
 267         curve_button_box.set_spacing (7);
 268         curve_button_box.pack_start (fade_out_table, false, false, 12);
 269         curve_button_box.pack_start (*vpacker2, false, false, 12);
 270         curve_button_box.pack_start (fade_in_table, false, false, 12);
 271
 272         get_vbox()->pack_start (*canvas_frame, true, true);
 273         get_vbox()->pack_start (curve_button_box, false, false);
 274
 275         /* button to allow hackers to check the actual curve values */
 276
 277 //      Button* foobut = manage (new Button ("dump"));
 278 //      foobut-.signal_clicked().connect (mem_fun(*this, &CrossfadeEditor::dump));
 279 //      vpacker.pack_start (*foobut, false, false);
 280
 281         current = In;
 282         set (xfade->fade_in(), In);
 283
 284         current = Out;
 285         set (xfade->fade_out(), Out);
 286
 287         curve_select_clicked (In);
 288
 289         xfade->StateChanged.connect (mem_fun(*this, &CrossfadeEditor::xfade_changed));
 290
 291         session.AuditionActive.connect (mem_fun(*this, &CrossfadeEditor::audition_state_changed));
 292         show_all_children();
 293 }
 294
 295 CrossfadeEditor::~CrossfadeEditor()
 296 {
 297         /* most objects will be destroyed when the toplevel window is. */
 298
 299         for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 300                 delete *i;
 301         }
 302
 303         for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 304                 delete *i;
 305         }
 306 }
 307
 308 void
 309 CrossfadeEditor::dump ()
 310 {
 311         for (AutomationList::iterator i = fade[Out].normative_curve.begin(); i != fade[Out].normative_curve.end(); ++i) {
 312                 cerr << (*i)->when << ' ' << (*i)->value << endl;
 313         }
 314 }
 315
 316 void
 317 CrossfadeEditor::audition_state_changed (bool yn)
 318 {
 319         ENSURE_GUI_THREAD (bind (mem_fun(*this, &CrossfadeEditor::audition_state_changed), yn));
 320
 321         if (!yn) {
 322                 audition_both_button.set_active (false);
 323                 audition_left_button.set_active (false);
 324                 audition_right_button.set_active (false);
 325                 audition_left_dry_button.set_active (false);
 326                 audition_right_dry_button.set_active (false);
 327         }
 328 }
 329
 330 void
 331 CrossfadeEditor::set (const ARDOUR::Curve& curve, WhichFade which)
 332 {
 333         double firstx, endx;
 334         ARDOUR::Curve::const_iterator the_end;
 335
 336         for (list<Point*>::iterator i = fade[which].points.begin(); i != fade[which].points.end(); ++i) {
 337                         delete *i;
 338         }
 339
 340         fade[which].points.clear ();
 341         fade[which].gain_curve.clear ();
 342         fade[which].normative_curve.clear ();
 343
 344         if (curve.empty()) {
 345                 goto out;
 346         }
 347
 348         the_end = curve.const_end();
 349         --the_end;
 350
 351         firstx = (*curve.const_begin())->when;
 352         endx = (*the_end)->when;
 353
 354         for (ARDOUR::Curve::const_iterator i = curve.const_begin(); i != curve.const_end(); ++i) {
 355
 356                 double xfract = ((*i)->when - firstx) / (endx - firstx);
 357                 double yfract = ((*i)->value - miny) / (maxy - miny);
 358
 359                 Point* p = make_point ();
 360
 361                 p->move_to (x_coordinate (xfract), y_coordinate (yfract),
 362                             xfract, yfract);
 363
 364                 fade[which].points.push_back (p);
 365         }
 366
 367         /* no need to sort because curve is already time-ordered */
 368
 369   out:
 370
 371         swap (which, current);
 372         redraw ();
 373         swap (which, current);
 374 }
 375
 376 bool
 377 CrossfadeEditor::curve_event (GdkEvent* event)
 378 {
 379         /* treat it like a toplevel event */
 380
 381         return canvas_event (event);
 382 }
 383
 384 bool
 385 CrossfadeEditor::point_event (GdkEvent* event, Point* point)
 386 {
 387
 388         if (point->curve != fade[current].line) {
 389                 return FALSE;
 390         }
 391
 392         switch (event->type) {
 393         case GDK_BUTTON_PRESS:
 394                 point_grabbed = true;
 395                 break;
 396         case GDK_BUTTON_RELEASE:
 397                 point_grabbed = false;
 398
 399                 if (Keyboard::is_delete_event (&event->button)) {
 400                         fade[current].points.remove (point);
 401                         delete point;
 402                 }
 403
 404                 redraw ();
 405                 break;
 406
 407         case GDK_MOTION_NOTIFY:
 408                 if (point_grabbed) {
 409                         double new_x, new_y;
 410
 411                         /* can't drag first or last points horizontally */
 412
 413                         if (point == fade[current].points.front() || point == fade[current].points.back()) {
 414                                 new_x = point->x;
 415                         } else {
 416                                 new_x = (event->motion.x - canvas_border)/effective_width();
 417                         }
 418
 419                         new_y = 1.0 - ((event->motion.y - canvas_border)/effective_height());
 420                         point->move_to (x_coordinate (new_x), y_coordinate (new_y),
 421                                         new_x, new_y);
 422                         redraw ();
 423                 }
 424                 break;
 425         default:
 426                 break;
 427         }
 428         return TRUE;
 429 }
 430
 431 bool
 432 CrossfadeEditor::canvas_event (GdkEvent* event)
 433 {
 434         switch (event->type) {
 435         case GDK_BUTTON_PRESS:
 436                 add_control_point ((event->button.x - canvas_border)/effective_width(),
 437                                    1.0 - ((event->button.y - canvas_border)/effective_height()));
 438                 return TRUE;
 439                 break;
 440         default:
 441                 break;
 442         }
 443         return FALSE;
 444 }
 445
 446 CrossfadeEditor::Point::~Point()
 447 {
 448         delete box;
 449 }
 450
 451 CrossfadeEditor::Point*
 452 CrossfadeEditor::make_point ()
 453 {
 454         Point* p = new Point;
 455
 456         p->box = new ArdourCanvas::SimpleRect (*(canvas->root()));
 457         p->box->property_fill() = true;
 458         p->box->property_fill_color_rgba() = color_map[cCrossfadeEditorPointFill];
 459         p->box->property_outline_color_rgba() = color_map[cCrossfadeEditorPointOutline];
 460         p->box->property_outline_pixels() = 1;
 461
 462         p->curve = fade[current].line;
 463
 464         p->box->signal_event().connect (bind (mem_fun (*this, &CrossfadeEditor::point_event), p));
 465
 466         return p;
 467 }
 468
 469 void
 470 CrossfadeEditor::add_control_point (double x, double y)
 471 {
 472         PointSorter cmp;
 473
 474         /* enforce end point x location */
 475
 476         if (fade[current].points.empty()) {
 477                 x = 0.0;
 478         } else if (fade[current].points.size() == 1) {
 479                 x = 1.0;
 480         }
 481
 482         Point* p = make_point ();
 483
 484         p->move_to (x_coordinate (x), y_coordinate (y), x, y);
 485
 486         fade[current].points.push_back (p);
 487         fade[current].points.sort (cmp);
 488
 489         redraw ();
 490 }
 491
 492 void
 493 CrossfadeEditor::Point::move_to (double nx, double ny, double xfract, double yfract)
 494 {
 495         const double half_size = rint(size/2.0);
 496         double x1 = nx - half_size;
 497         double x2 = nx + half_size;
 498
 499         box->property_x1() = x1;
 500         box->property_x2() = x2;
 501
 502         box->property_y1() = ny - half_size;
 503         box->property_y2() = ny + half_size;
 504
 505         x = xfract;
 506         y = yfract;
 507 }
 508
 509 void
 510 CrossfadeEditor::canvas_allocation (Gtk::Allocation& alloc)
 511 {
 512         if (toplevel) {
 513                 toplevel->property_x1() = 0.0;
 514                 toplevel->property_y1() = 0.0;
 515                 toplevel->property_x2() = (double) canvas->get_allocation().get_width() + canvas_border;
 516                 toplevel->property_y2() = (double) canvas->get_allocation().get_height() + canvas_border;
 517         }
 518
 519         canvas->set_scroll_region (0.0, 0.0,
 520                                    canvas->get_allocation().get_width(),
 521                                    canvas->get_allocation().get_height());
 522
 523         Point* end = make_point ();
 524         PointSorter cmp;
 525
 526         if (fade[In].points.size() > 1) {
 527                 Point* old_end = fade[In].points.back();
 528                 fade[In].points.pop_back ();
 529                 end->move_to (x_coordinate (old_end->x),
 530                               y_coordinate (old_end->y),
 531                               old_end->x, old_end->y);
 532                 delete old_end;
 533         } else {
 534                 double x = 1.0;
 535                 double y = 0.5;
 536                 end->move_to (x_coordinate (x), y_coordinate (y), x, y);
 537
 538         }
 539
 540         fade[In].points.push_back (end);
 541         fade[In].points.sort (cmp);
 542
 543         for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 544                 (*i)->move_to (x_coordinate((*i)->x), y_coordinate((*i)->y),
 545                                (*i)->x, (*i)->y);
 546         }
 547
 548         end = make_point ();
 549
 550         if (fade[Out].points.size() > 1) {
 551                 Point* old_end = fade[Out].points.back();
 552                 fade[Out].points.pop_back ();
 553                 end->move_to (x_coordinate (old_end->x),
 554                               y_coordinate (old_end->y),
 555                               old_end->x, old_end->y);
 556                 delete old_end;
 557         } else {
 558                 double x = 1.0;
 559                 double y = 0.5;
 560                 end->move_to (x_coordinate (x), y_coordinate (y), x, y);
 561
 562         }
 563
 564         fade[Out].points.push_back (end);
 565         fade[Out].points.sort (cmp);
 566
 567         for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 568                 (*i)->move_to (x_coordinate ((*i)->x),
 569                                y_coordinate ((*i)->y),
 570                                (*i)->x, (*i)->y);
 571         }
 572
 573         WhichFade old_current = current;
 574         current = In;
 575         redraw ();
 576         current = Out;
 577         redraw ();
 578         current = old_current;
 579
 580         double spu = xfade->length() / (double) effective_width();
 581
 582         if (fade[In].waves.empty()) {
 583                 make_waves (xfade->in(), In);
 584         }
 585
 586         if (fade[Out].waves.empty()) {
 587                 make_waves (xfade->out(), Out);
 588         }
 589
 590         double ht;
 591         vector<ArdourCanvas::WaveView*>::iterator i;
 592         uint32_t n;
 593
 594         ht = canvas->get_allocation().get_height() / xfade->in()->n_channels();
 595
 596         for (n = 0, i = fade[In].waves.begin(); i != fade[In].waves.end(); ++i, ++n) {
 597                 double yoff;
 598
 599                 yoff = n * ht;
 600
 601                 (*i)->property_y() = yoff;
 602                 (*i)->property_height() = ht;
 603                 (*i)->property_samples_per_unit() = spu;
 604         }
 605
 606         ht = canvas->get_allocation().get_height() / xfade->out()->n_channels();
 607
 608         for (n = 0, i = fade[Out].waves.begin(); i != fade[Out].waves.end(); ++i, ++n) {
 609                 double yoff;
 610
 611                 yoff = n * ht;
 612
 613                 (*i)->property_y() = yoff;
 614                 (*i)->property_height() = ht;
 615                 (*i)->property_samples_per_unit() = spu;
 616         }
 617
 618 }
 619
 620
 621 void
 622 CrossfadeEditor::xfade_changed (Change ignored)
 623 {
 624         set (xfade->fade_in(), In);
 625         set (xfade->fade_out(), Out);
 626 }
 627
 628 void
 629 CrossfadeEditor::redraw ()
 630 {
 631         if (canvas->get_allocation().get_width() < 2) {
 632                 return;
 633         }
 634
 635         nframes_t len = xfade->length ();
 636
 637         fade[current].normative_curve.clear ();
 638         fade[current].gain_curve.clear ();
 639
 640         for (list<Point*>::iterator i = fade[current].points.begin(); i != fade[current].points.end(); ++i) {
 641                 fade[current].normative_curve.add ((*i)->x, (*i)->y);
 642                 fade[current].gain_curve.add (((*i)->x * len), (*i)->y);
 643         }
 644
 645         size_t npoints = (size_t) effective_width();
 646         float vec[npoints];
 647
 648         fade[current].normative_curve.get_vector (0, 1.0, vec, npoints);
 649
 650         ArdourCanvas::Points pts;
 651         ArdourCanvas::Points spts;
 652
 653         while (pts.size() < npoints) {
 654                 pts.push_back (Gnome::Art::Point (0,0));
 655         }
 656
 657         while (spts.size() < npoints + 3) {
 658                 spts.push_back (Gnome::Art::Point (0,0));
 659         }
 660
 661         /* the shade coordinates *MUST* be in anti-clockwise order.
 662          */
 663
 664         if (current == In) {
 665
 666                 /* lower left */
 667
 668                 spts[0].set_x (canvas_border);
 669                 spts[0].set_y (effective_height() + canvas_border);
 670
 671                 /* lower right */
 672
 673                 spts[1].set_x (effective_width() + canvas_border);
 674                 spts[1].set_y (effective_height() + canvas_border);
 675
 676                 /* upper right */
 677
 678                 spts[2].set_x (effective_width() + canvas_border);
 679                 spts[2].set_y (canvas_border);
 680
 681
 682         } else {
 683
 684                 /*  upper left */
 685
 686                 spts[0].set_x (canvas_border);
 687                 spts[0].set_y (canvas_border);
 688
 689                 /* lower left */
 690
 691                 spts[1].set_x (canvas_border);
 692                 spts[1].set_y (effective_height() + canvas_border);
 693
 694                 /* lower right */
 695
 696                 spts[2].set_x (effective_width() + canvas_border);
 697                 spts[2].set_y (effective_height() + canvas_border);
 698
 699         }
 700
 701         size_t last_spt = (npoints + 3) - 1;
 702
 703         for (size_t i = 0; i < npoints; ++i) {
 704
 705                 double y = vec[i];
 706
 707                 pts[i].set_x (canvas_border + i);
 708                 pts[i].set_y  (y_coordinate (y));
 709
 710                 spts[last_spt - i].set_x (canvas_border + i);
 711                 spts[last_spt - i].set_y (pts[i].get_y());
 712         }
 713
 714         fade[current].line->property_points() = pts;
 715         fade[current].shading->property_points() = spts;
 716
 717         for (vector<ArdourCanvas::WaveView*>::iterator i = fade[current].waves.begin(); i != fade[current].waves.end(); ++i) {
 718                 (*i)->property_gain_src() = &fade[current].gain_curve;
 719         }
 720 }
 721
 722 void
 723 CrossfadeEditor::apply_preset (Preset *preset)
 724 {
 725         for (list<Point*>::iterator i = fade[current].points.begin(); i != fade[current].points.end(); ++i) {
 726                 delete *i;
 727         }
 728
 729         fade[current].points.clear ();
 730
 731         for (Preset::iterator i = preset->begin(); i != preset->end(); ++i) {
 732                 Point* p = make_point ();
 733                 p->move_to (x_coordinate ((*i).x), y_coordinate ((*i).y),
 734                             (*i).x, (*i).y);
 735                 fade[current].points.push_back (p);
 736         }
 737
 738         redraw ();
 739 }
 740
 741 void
 742 CrossfadeEditor::apply ()
 743 {
 744         _apply_to (xfade);
 745 }
 746
 747 void
 748 CrossfadeEditor::_apply_to (boost::shared_ptr<Crossfade> xf)
 749 {
 750         ARDOUR::Curve& in (xf->fade_in());
 751         ARDOUR::Curve& out (xf->fade_out());
 752
 753         /* IN */
 754
 755
 756         ARDOUR::Curve::const_iterator the_end = in.const_end();
 757         --the_end;
 758
 759         double firstx = (*in.begin())->when;
 760         double endx = (*the_end)->when;
 761         double miny = in.get_min_y ();
 762         double maxy = in.get_max_y ();
 763
 764         in.freeze ();
 765         in.clear ();
 766
 767         for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 768
 769                 double when = firstx + ((*i)->x * (endx - firstx));
 770                 double value = (*i)->y; // miny + ((*i)->y * (maxy - miny));
 771                 in.add (when, value);
 772         }
 773
 774         /* OUT */
 775
 776         the_end = out.const_end();
 777         --the_end;
 778
 779         firstx = (*out.begin())->when;
 780         endx = (*the_end)->when;
 781         miny = out.get_min_y ();
 782         maxy = out.get_max_y ();
 783
 784         out.freeze ();
 785         out.clear ();
 786
 787         for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 788
 789                 double when = firstx + ((*i)->x * (endx - firstx));
 790                 double value = (*i)->y; // miny + ((*i)->y * (maxy - miny));
 791                 out.add (when, value);
 792         }
 793
 794         in.thaw ();
 795         out.thaw ();
 796 }
 797
 798 void
 799 CrossfadeEditor::setup (boost::shared_ptr<Crossfade> xfade)
 800 {
 801         _apply_to (xfade);
 802         xfade->set_active (true);
 803         xfade->fade_in().solve ();
 804         xfade->fade_out().solve ();
 805 }
 806
 807 void
 808 CrossfadeEditor::clear ()
 809 {
 810         for (list<Point*>::iterator i = fade[current].points.begin(); i != fade[current].points.end(); ++i) {
 811                 delete *i;
 812         }
 813
 814         fade[current].points.clear ();
 815
 816         redraw ();
 817 }
 818
 819 void
 820 CrossfadeEditor::reset ()
 821 {
 822         set (xfade->fade_in(),  In);
 823         set (xfade->fade_out(), Out);
 824 }
 825
 826 void
 827 CrossfadeEditor::build_presets ()
 828 {
 829         Preset* p;
 830
 831         fade_in_presets = new Presets;
 832         fade_out_presets = new Presets;
 833
 834         /* FADE OUT */
 835         p = new Preset ("hiin.xpm");
 836         p->push_back (PresetPoint (0, 0));
 837         p->push_back (PresetPoint (0.0207373, 0.197222));
 838         p->push_back (PresetPoint (0.0645161, 0.525));
 839         p->push_back (PresetPoint (0.152074, 0.802778));
 840         p->push_back (PresetPoint (0.276498, 0.919444));
 841         p->push_back (PresetPoint (0.481567, 0.980556));
 842         p->push_back (PresetPoint (0.767281, 1));
 843         p->push_back (PresetPoint (1, 1));
 844         fade_in_presets->push_back (p);
 845
 846         p = new Preset ("loin.xpm");
 847         p->push_back (PresetPoint (0, 0));
 848         p->push_back (PresetPoint (0.389401, 0.0333333));
 849         p->push_back (PresetPoint (0.629032, 0.0861111));
 850         p->push_back (PresetPoint (0.829493, 0.233333));
 851         p->push_back (PresetPoint (0.9447, 0.483333));
 852         p->push_back (PresetPoint (0.976959, 0.697222));
 853         p->push_back (PresetPoint (1, 1));
 854         fade_in_presets->push_back (p);
 855
 856         p = new Preset ("regin.xpm");
 857         p->push_back (PresetPoint (0, 0));
 858         p->push_back (PresetPoint (0.0737327, 0.308333));
 859         p->push_back (PresetPoint (0.246544, 0.658333));
 860         p->push_back (PresetPoint (0.470046, 0.886111));
 861         p->push_back (PresetPoint (0.652074, 0.972222));
 862         p->push_back (PresetPoint (0.771889, 0.988889));
 863         p->push_back (PresetPoint (1, 1));
 864         fade_in_presets->push_back (p);
 865
 866         p = new Preset ("regin2.xpm");
 867         p->push_back (PresetPoint (0, 0));
 868         p->push_back (PresetPoint (0.304147, 0.0694444));
 869         p->push_back (PresetPoint (0.529954, 0.152778));
 870         p->push_back (PresetPoint (0.725806, 0.333333));
 871         p->push_back (PresetPoint (0.847926, 0.558333));
 872         p->push_back (PresetPoint (0.919355, 0.730556));
 873         p->push_back (PresetPoint (1, 1));
 874         fade_in_presets->push_back (p);
 875
 876         p = new Preset ("linin.xpm");
 877         p->push_back (PresetPoint (0, 0));
 878         p->push_back (PresetPoint (1, 1));
 879         fade_in_presets->push_back (p);
 880
 881         /* FADE OUT */
 882
 883         p = new Preset ("hiout.xpm");
 884         p->push_back (PresetPoint (0, 1));
 885         p->push_back (PresetPoint (0.305556, 1));
 886         p->push_back (PresetPoint (0.548611, 0.991736));
 887         p->push_back (PresetPoint (0.759259, 0.931129));
 888         p->push_back (PresetPoint (0.918981, 0.68595));
 889         p->push_back (PresetPoint (0.976852, 0.22865));
 890         p->push_back (PresetPoint (1, 0));
 891         fade_out_presets->push_back (p);
 892
 893         p = new Preset ("regout.xpm");
 894         p->push_back (PresetPoint (0, 1));
 895         p->push_back (PresetPoint (0.228111, 0.988889));
 896         p->push_back (PresetPoint (0.347926, 0.972222));
 897         p->push_back (PresetPoint (0.529954, 0.886111));
 898         p->push_back (PresetPoint (0.753456, 0.658333));
 899         p->push_back (PresetPoint (0.9262673, 0.308333));
 900         p->push_back (PresetPoint (1, 0));
 901         fade_out_presets->push_back (p);
 902
 903         p = new Preset ("loout.xpm");
 904         p->push_back (PresetPoint (0, 1));
 905         p->push_back (PresetPoint (0.023041, 0.697222));
 906         p->push_back (PresetPoint (0.0553,   0.483333));
 907         p->push_back (PresetPoint (0.170507, 0.233333));
 908         p->push_back (PresetPoint (0.370968, 0.0861111));
 909         p->push_back (PresetPoint (0.610599, 0.0333333));
 910         p->push_back (PresetPoint (1, 0));
 911         fade_out_presets->push_back (p);
 912
 913         p = new Preset ("regout2.xpm");
 914         p->push_back (PresetPoint (0, 1));
 915         p->push_back (PresetPoint (0.080645, 0.730556));
 916         p->push_back (PresetPoint (0.277778, 0.289256));
 917         p->push_back (PresetPoint (0.470046, 0.152778));
 918         p->push_back (PresetPoint (0.695853, 0.0694444));
 919         p->push_back (PresetPoint (1, 0));
 920         fade_out_presets->push_back (p);
 921
 922         p = new Preset ("linout.xpm");
 923         p->push_back (PresetPoint (0, 1));
 924         p->push_back (PresetPoint (1, 0));
 925         fade_out_presets->push_back (p);
 926 }
 927
 928 void
 929 CrossfadeEditor::curve_select_clicked (WhichFade wf)
 930 {
 931         current = wf;
 932
 933         if (wf == In) {
 934
 935                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[In].waves.begin(); i != fade[In].waves.end(); ++i) {
 936                         (*i)->property_wave_color() = color_map[cSelectedCrossfadeEditorWave];
 937                 }
 938
 939                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[Out].waves.begin(); i != fade[Out].waves.end(); ++i) {
 940                         (*i)->property_wave_color() = color_map[cCrossfadeEditorWave];
 941                 }
 942
 943                 fade[In].line->property_fill_color_rgba() = color_map[cSelectedCrossfadeEditorLine];
 944                 fade[Out].line->property_fill_color_rgba() = color_map[cCrossfadeEditorLine];
 945                 fade[Out].shading->hide();
 946                 fade[In].shading->show();
 947
 948                 for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 949                         (*i)->box->hide();
 950                 }
 951
 952                 for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 953                         (*i)->box->show ();
 954                 }
 955
 956                 for (vector<Button*>::iterator i = fade_out_buttons.begin(); i != fade_out_buttons.end(); ++i) {
 957                         (*i)->set_sensitive (false);
 958                 }
 959
 960                 for (vector<Button*>::iterator i = fade_in_buttons.begin(); i != fade_in_buttons.end(); ++i) {
 961                         (*i)->set_sensitive (true);
 962                 }
 963
 964         } else {
 965
 966                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[In].waves.begin(); i != fade[In].waves.end(); ++i) {
 967                         (*i)->property_wave_color() = color_map[cCrossfadeEditorWave];
 968                 }
 969
 970                 for (vector<ArdourCanvas::WaveView*>::iterator i = fade[Out].waves.begin(); i != fade[Out].waves.end(); ++i) {
 971                         (*i)->property_wave_color() = color_map[cSelectedCrossfadeEditorWave];
 972                 }
 973
 974                 fade[Out].line->property_fill_color_rgba() = color_map[cSelectedCrossfadeEditorLine];
 975                 fade[In].line->property_fill_color_rgba() = color_map[cCrossfadeEditorLine];
 976                 fade[In].shading->hide();
 977                 fade[Out].shading->show();
 978
 979                 for (list<Point*>::iterator i = fade[In].points.begin(); i != fade[In].points.end(); ++i) {
 980                         (*i)->box->hide();
 981                 }
 982
 983                 for (list<Point*>::iterator i = fade[Out].points.begin(); i != fade[Out].points.end(); ++i) {
 984                         (*i)->box->show();
 985                 }
 986
 987                 for (vector<Button*>::iterator i = fade_out_buttons.begin(); i != fade_out_buttons.end(); ++i) {
 988                         (*i)->set_sensitive (true);
 989                 }
 990
 991                 for (vector<Button*>::iterator i = fade_in_buttons.begin(); i != fade_in_buttons.end(); ++i) {
 992                         (*i)->set_sensitive (false);
 993                 }
 994
 995         }
 996 }
 997
 998 double
 999 CrossfadeEditor::x_coordinate (double& xfract) const
1000 {
1001         xfract = min (1.0, xfract);
1002         xfract = max (0.0, xfract);
1003
1004         return canvas_border + (xfract * effective_width());
1005 }
1006
1007 double
1008 CrossfadeEditor::y_coordinate (double& yfract) const
1009 {
1010         yfract = min (1.0, yfract);
1011         yfract = max (0.0, yfract);
1012
1013         return (canvas->get_allocation().get_height() - (canvas_border)) - (yfract * effective_height());
1014 }
1015
1016 void
1017 CrossfadeEditor::make_waves (boost::shared_ptr<AudioRegion> region, WhichFade which)
1018 {
1019         gdouble ht;
1020         uint32_t nchans = region->n_channels();
1021         guint32 color;
1022         double spu;
1023
1024         if (which == In) {
1025                 color = color_map[cSelectedCrossfadeEditorWave];
1026         } else {
1027                 color = color_map[cCrossfadeEditorWave];
1028         }
1029
1030         ht = canvas->get_allocation().get_height() / (double) nchans;
1031         spu = xfade->length() / (double) effective_width();
1032
1033         for (uint32_t n = 0; n < nchans; ++n) {
1034
1035                 gdouble yoff = n * ht;
1036
1037                 if (region->audio_source(n)->peaks_ready (bind (mem_fun(*this, &CrossfadeEditor::peaks_ready), region, which), peaks_ready_connection)) {
1038                         WaveView* waveview = new WaveView (*(canvas->root()));
1039
1040                         waveview->property_data_src() = region.get();
1041                         waveview->property_cache_updater() =  true;
1042                         waveview->property_cache() = WaveView::create_cache();
1043                         waveview->property_channel() = n;
1044                         waveview->property_length_function() = (void*) region_length_from_c;
1045                         waveview->property_sourcefile_length_function() = (void*) sourcefile_length_from_c;
1046                         waveview->property_peak_function() = (void*) region_read_peaks_from_c;
1047                         waveview->property_gain_function() = (void*) curve_get_vector_from_c;
1048                         waveview->property_gain_src() = &fade[which].gain_curve;
1049                         waveview->property_x() = canvas_border;
1050                         waveview->property_y() = yoff;
1051                         waveview->property_height() = ht;
1052                         waveview->property_samples_per_unit() = spu;
1053                         waveview->property_amplitude_above_axis() = 2.0;
1054                         waveview->property_wave_color() = color;
1055
1056                         waveview->lower_to_bottom();
1057                         fade[which].waves.push_back (waveview);
1058                 }
1059         }
1060
1061         toplevel->lower_to_bottom();
1062 }
1063
1064 void
1065 CrossfadeEditor::peaks_ready (boost::shared_ptr<AudioRegion> r, WhichFade which)
1066 {
1067         /* this should never be called, because the peak files for an xfade
1068            will be ready by the time we want them. but our API forces us
1069            to provide this, so ..
1070         */
1071         peaks_ready_connection.disconnect ();
1072         make_waves (r, which);
1073 }
1074
1075 void
1076 CrossfadeEditor::audition_both ()
1077 {
1078         AudioPlaylist& pl (session.the_auditioner()->prepare_playlist());
1079         nframes_t preroll;
1080         nframes_t postroll;
1081         nframes_t length;
1082         nframes_t left_start_offset;
1083         nframes_t right_length;
1084         nframes_t left_length;
1085
1086         if (preroll_button.get_active()) {
1087                 preroll = ARDOUR_UI::instance()->preroll_clock.current_duration ();
1088         } else {
1089                 preroll = 0;
1090         }
1091
1092         if (postroll_button.get_active()) {
1093                 postroll = ARDOUR_UI::instance()->postroll_clock.current_duration ();
1094         } else {
1095                 postroll = 0;
1096         }
1097
1098         if ((left_start_offset = xfade->out()->length() - xfade->length()) >= preroll) {
1099                 left_start_offset -= preroll;
1100         }
1101
1102         length = 0;
1103
1104         if ((left_length = xfade->length()) < xfade->out()->length() - left_start_offset) {
1105                 length += postroll;
1106         }
1107
1108         right_length = xfade->length();
1109
1110         if (xfade->in()->length() - right_length < postroll) {
1111                 right_length += postroll;
1112         }
1113
1114         boost::shared_ptr<AudioRegion> left (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->out(), left_start_offset, left_length, "xfade out",
1115                                                                                                               0, Region::DefaultFlags, false)));
1116         boost::shared_ptr<AudioRegion> right (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->in(), 0, right_length, "xfade in",
1117                                                                                                                0, Region::DefaultFlags, false)));
1118
1119         pl.add_region (left, 0);
1120         pl.add_region (right, 1+preroll);
1121
1122         /* there is only one ... */
1123
1124         pl.foreach_crossfade (this, &CrossfadeEditor::setup);
1125
1126         session.audition_playlist ();
1127 }
1128
1129 void
1130 CrossfadeEditor::audition_left_dry ()
1131 {
1132         boost::shared_ptr<AudioRegion> left (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->out(), xfade->out()->length() - xfade->length(), xfade->length(), "xfade left",
1133                                                                                                               0, Region::DefaultFlags, false)));
1134
1135         session.audition_region (left);
1136 }
1137
1138 void
1139 CrossfadeEditor::audition_left ()
1140 {
1141         AudioPlaylist& pl (session.the_auditioner()->prepare_playlist());
1142
1143         boost::shared_ptr<AudioRegion> left (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->out(), xfade->out()->length() - xfade->length(), xfade->length(), "xfade left",
1144                                                                                                               0, Region::DefaultFlags, false)));
1145         boost::shared_ptr<AudioRegion> right (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->in(), 0, xfade->length(), "xfade in",
1146                                                                                                                0, Region::DefaultFlags, false)));
1147
1148         pl.add_region (left, 0);
1149         pl.add_region (right, 1);
1150
1151         right->set_muted (true);
1152
1153         /* there is only one ... */
1154
1155         pl.foreach_crossfade (this, &CrossfadeEditor::setup);
1156
1157         session.audition_playlist ();
1158
1159         /* memory leak for regions */
1160 }
1161
1162 void
1163 CrossfadeEditor::audition_right_dry ()
1164 {
1165         boost::shared_ptr<AudioRegion> right (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->in(), 0, xfade->length(), "xfade in",
1166                                                                                                                0, Region::DefaultFlags, false)));
1167         session.audition_region (right);
1168 }
1169
1170 void
1171 CrossfadeEditor::audition_right ()
1172 {
1173         AudioPlaylist& pl (session.the_auditioner()->prepare_playlist());
1174
1175         boost::shared_ptr<AudioRegion> left (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->out(), xfade->out()->length() - xfade->length(), xfade->length(), "xfade out",
1176                                                                                                               0, Region::DefaultFlags, false)));
1177                                              boost::shared_ptr<AudioRegion> right (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (xfade->out(), 0, xfade->length(), "xfade out",
1178                                                                                                                0, Region::DefaultFlags, false)));
1179
1180         pl.add_region (left, 0);
1181         pl.add_region (right, 1);
1182
1183         left->set_muted (true);
1184
1185         /* there is only one ... */
1186
1187         pl.foreach_crossfade (this, &CrossfadeEditor::setup);
1188
1189         session.audition_playlist ();
1190 }
1191
1192 void
1193 CrossfadeEditor::cancel_audition ()
1194 {
1195         session.cancel_audition ();
1196 }
1197
1198 void
1199 CrossfadeEditor::audition_toggled ()
1200 {
1201         bool x;
1202
1203         if ((x = audition_both_button.get_active ()) != session.is_auditioning()) {
1204
1205                 if (x) {
1206                         audition_both ();
1207                 } else {
1208                         cancel_audition ();
1209                 }
1210         }
1211 }
1212
1213 void
1214 CrossfadeEditor::audition_right_toggled ()
1215 {
1216         bool x;
1217
1218         if ((x = audition_right_button.get_active ()) != session.is_auditioning()) {
1219
1220                 if (x) {
1221                         audition_right ();
1222                 } else {
1223                         cancel_audition ();
1224                 }
1225         }
1226 }
1227
1228 void
1229 CrossfadeEditor::audition_right_dry_toggled ()
1230 {
1231         bool x;
1232
1233         if ((x = audition_right_dry_button.get_active ()) != session.is_auditioning()) {
1234
1235                 if (x) {
1236                         audition_right_dry ();
1237                 } else {
1238                         cancel_audition ();
1239                 }
1240         }
1241 }
1242
1243 void
1244 CrossfadeEditor::audition_left_toggled ()
1245 {
1246         bool x;
1247
1248         if ((x = audition_left_button.get_active ()) != session.is_auditioning()) {
1249
1250                 if (x) {
1251                         audition_left ();
1252                 } else {
1253                         cancel_audition ();
1254                 }
1255         }
1256 }
1257
1258 void
1259 CrossfadeEditor::audition_left_dry_toggled ()
1260 {
1261         bool x;
1262
1263         if ((x = audition_left_dry_button.get_active ()) != session.is_auditioning()) {
1264
1265                 if (x) {
1266                         audition_left_dry ();
1267                 } else {
1268                         cancel_audition ();
1269                 }
1270         }
1271 }