cinelerra/edits.C

   1 #include "aedit.h"
   2 #include "asset.h"
   3 #include "assets.h"
   4 #include "automation.h"
   5 #include "cache.h"
   6 #include "clip.h"
   7 #include "edit.h"
   8 #include "edits.h"
   9 #include "edl.h"
  10 #include "edlsession.h"
  11 #include "file.h"
  12 #include "filexml.h"
  13 #include "filesystem.h"
  14 #include "localsession.h"
  15 #include "plugin.h"
  16 #include "strategies.inc"
  17 #include "track.h"
  18 #include "transition.h"
  19 #include "transportque.inc"
  20
  21 #include <string.h>
  22
  23 Edits::Edits(EDL *edl, Track *track, Edit *default_edit)
  24  : List<Edit>()
  25 {
  26         this->edl = edl;
  27         this->track = track;
  28
  29         List<Edit>::List<Edit>();
  30         default_edit->edl = edl;
  31         default_edit->track = track;
  32         default_edit->startproject = 0;
  33         default_edit->length = LAST_VIRTUAL_LENGTH;
  34         insert_after(0, default_edit);
  35         loaded_length = 0;
  36 }
  37
  38 Edits::~Edits()
  39 {
  40 }
  41
  42
  43 void Edits::equivalent_output(Edits *edits, int64_t *result)
  44 {
  45 // For the case of plugin sets, a new plugin set may be created with
  46 // plugins only starting after 0.  We only want to restart brender at
  47 // the first plugin in this case.
  48         for(Edit *current = first, *that_current = edits->first;
  49                 current || that_current;
  50                 current = NEXT,
  51                 that_current = that_current->next)
  52         {
  53 //printf("Edits::equivalent_output 1 %d\n", *result);
  54                 if(!current && that_current)
  55                 {
  56                         int64_t position1 = length();
  57                         int64_t position2 = that_current->startproject;
  58                         if(*result < 0 || *result > MIN(position1, position2))
  59                                 *result = MIN(position1, position2);
  60                         break;
  61                 }
  62                 else
  63                 if(current && !that_current)
  64                 {
  65                         int64_t position1 = edits->length();
  66                         int64_t position2 = current->startproject;
  67                         if(*result < 0 || *result > MIN(position1, position2))
  68                                 *result = MIN(position1, position2);
  69                         break;
  70                 }
  71                 else
  72                 {
  73 //printf("Edits::equivalent_output 2 %d\n", *result);
  74                         current->equivalent_output(that_current, result);
  75 //printf("Edits::equivalent_output 3 %d\n", *result);
  76                 }
  77         }
  78 }
  79
  80 void Edits::copy_from(Edits *edits)
  81 {
  82         while(last) delete last;
  83         for(Edit *current = edits->first; current; current = NEXT)
  84         {
  85                 Edit *new_edit = append(create_edit());
  86                 new_edit->copy_from(current);
  87         }
  88         loaded_length = edits->loaded_length;
  89 }
  90
  91
  92 Edits& Edits::operator=(Edits& edits)
  93 {
  94 printf("Edits::operator= 1\n");
  95         copy_from(&edits);
  96         return *this;
  97 }
  98
  99
 100 void Edits::insert_asset(Asset_GC asset,
 101         int64_t length,
 102         int64_t position,
 103         int track_number)
 104 {
 105         Edit *new_edit = insert_new_edit(position);
 106
 107         new_edit->asset = asset;
 108         new_edit->startsource = 0;
 109         new_edit->startproject = position;
 110         new_edit->length = length;
 111
 112         if(asset->audio_data)
 113                 new_edit->channel = track_number % asset->channels;
 114         else
 115         if(asset->video_data)
 116                 new_edit->channel = track_number % asset->layers;
 117
 118 //printf("Edits::insert_asset %d %d\n", new_edit->channel, new_edit->length);
 119         for(Edit *current = new_edit->next; current; current = NEXT)
 120         {
 121                 current->startproject += length;
 122         }
 123 }
 124
 125 void Edits::insert_edits(Edits *source_edits, int64_t position)
 126 {
 127         int64_t clipboard_length =
 128                 track->to_units(source_edits->edl->local_session->clipboard_length, 1);
 129         int64_t clipboard_end = position + clipboard_length;
 130
 131         int64_t total_length = 0;
 132         for(Edit *source_edit = source_edits->first;
 133                 source_edit;
 134                 source_edit = source_edit->next)
 135         {
 136 // Update Assets
 137                 Asset_GC dest_asset = edl->assets->update(source_edit->asset);
 138 // Open destination area
 139                 Edit *dest_edit = insert_new_edit(position + source_edit->startproject);
 140
 141                 dest_edit->copy_from(source_edit);
 142                 dest_edit->asset = dest_asset;
 143                 dest_edit->startproject = position + source_edit->startproject;
 144
 145
 146
 147 // Shift keyframes in source edit to their position in the
 148 // destination edit for plugin case
 149                 dest_edit->shift_keyframes(position);
 150
 151
 152                 total_length += dest_edit->length;
 153                 if (source_edits->loaded_length && total_length > source_edits->loaded_length)
 154                 {
 155                         dest_edit->length -= (total_length - source_edits->loaded_length);
 156                 }
 157
 158 // Shift following edits and keyframes in following edits by length
 159 // in current source edit.
 160                 for(Edit *future_edit = dest_edit->next;
 161                         future_edit;
 162                         future_edit = future_edit->next)
 163                 {
 164                         future_edit->startproject += dest_edit->length;
 165                         future_edit->shift_keyframes(dest_edit->length);
 166                 }
 167
 168 // Fill clipboard length with silence
 169                 if(!source_edit->next &&
 170                         dest_edit->startproject + dest_edit->length < clipboard_end)
 171                 {
 172                         paste_silence(dest_edit->startproject + dest_edit->length,
 173                                 clipboard_end);
 174                 }
 175         }
 176 }
 177
 178
 179 // Native units
 180 // Can't paste silence in here because it's used by paste_silence.
 181 Edit* Edits::insert_new_edit(int64_t position)
 182 {
 183         Edit *current = 0;
 184 //printf("Edits::insert_new_edit 1\n");
 185         Edit *new_edit;
 186         current = split_edit(position);
 187
 188 //printf("Edits::insert_new_edit 1\n");
 189         if (current->length == 0) // when creating a split we got 0-length edit, just use it!
 190                 new_edit = current;
 191         else      // we need to insert
 192         {
 193                 current = PREVIOUS;
 194                 new_edit = create_edit();
 195                 insert_after(current, new_edit);
 196         }
 197 //printf("Edits::insert_new_edit 1\n");
 198         new_edit->startproject = position;
 199 //printf("Edits::insert_new_edit 2\n");
 200         return new_edit;
 201 }
 202
 203
 204 Edit* Edits::split_edit(int64_t position)
 205 {
 206 // Get edit containing position
 207         Edit *edit = editof(position, PLAY_FORWARD, 0);
 208 // No edit found, make one - except when we are at zero position!
 209         if(!edit && position != 0)
 210                 if (length() == position)
 211                 {
 212                         edit = last; // we do not need any edit to extend past the last one
 213                 } else
 214                 if (!last || length() < position)
 215                 {
 216
 217                         // Even when track is completely empty or split is beyond last edit, return correct edit
 218                         Edit *empty = create_edit();
 219                         if (last)
 220                                 empty->startproject = length(); // end of last edit
 221                         else
 222                                 empty->startproject = 0; // empty track
 223                         empty->length = position - empty->startproject;
 224                         insert_after(last, empty);
 225                         edit = empty;
 226                 } else
 227                 {  // now we are now surely in situation where we have a) broken edit list or b) negative position... report error!
 228                         printf("ERROR!\n");
 229                         printf("Trying to insert edit at position, but failed: %lli\n", position);
 230                         printf("Dump is here:\n");
 231                         track->dump();
 232                         return 0;
 233                 }
 234 // Split would have created a 0 length
 235 //      if(edit->startproject == position) return edit;
 236 // Create anyway so the return value comes before position
 237
 238         Edit *new_edit = create_edit();
 239         insert_after(edit, new_edit);
 240         if (edit)  // if we have actually split the edit, do the funky stuff!
 241         {
 242                 new_edit->copy_from(edit);
 243                 new_edit->length = new_edit->startproject + new_edit->length - position;
 244                 edit->length = position - edit->startproject;
 245                 new_edit->startsource += edit->length;
 246
 247
 248 // Decide what to do with the transition
 249                 if(edit->length && edit->transition)
 250                 {
 251                         delete new_edit->transition;
 252                         new_edit->transition = 0;
 253                 }
 254
 255                 if(edit->transition && edit->transition->length > edit->length)
 256                         edit->transition->length = edit->length;
 257                 if(new_edit->transition && new_edit->transition->length > new_edit->length)
 258                         new_edit->transition->length = new_edit->length;
 259         } else
 260                 new_edit->length = 0;
 261         new_edit->startproject = position;
 262         return new_edit;
 263 }
 264
 265 int Edits::save(FileXML *xml, char *output_path)
 266 {
 267         copy(0, length(), xml, output_path);
 268         return 0;
 269 }
 270
 271 void Edits::resample(double old_rate, double new_rate)
 272 {
 273         for(Edit *current = first; current; current = NEXT)
 274         {
 275                 current->startproject = Units::to_int64((double)current->startproject /
 276                         old_rate *
 277                         new_rate);
 278                 if(PREVIOUS) PREVIOUS->length = current->startproject - PREVIOUS->startproject;
 279                 current->startsource = Units::to_int64((double)current->startsource /
 280                         old_rate *
 281                         new_rate);
 282                 if(!NEXT) current->length = Units::to_int64((double)current->length /
 283                         old_rate *
 284                         new_rate);
 285                 if(current->transition)
 286                 {
 287                         current->transition->length = Units::to_int64(
 288                                 (double)current->transition->length /
 289                                 old_rate *
 290                                 new_rate);
 291                 }
 292                 current->resample(old_rate, new_rate);
 293         }
 294 }
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309 int Edits::optimize()
 310 {
 311         int result = 1;
 312         Edit *current;
 313
 314 //return 0;
 315 // Sort edits by starting point
 316         while(result)
 317         {
 318                 result = 0;
 319
 320                 for(current = first; current; current = NEXT)
 321                 {
 322                         Edit *next_edit = NEXT;
 323
 324                         if(next_edit && next_edit->startproject < current->startproject)
 325                         {
 326                                 swap(next_edit, current);
 327                                 result = 1;
 328                         }
 329                 }
 330         }
 331
 332 // Insert silence between edits which aren't consecutive
 333         for(current = last; current; current = current->previous)
 334         {
 335                 if(current->previous)
 336                 {
 337                         Edit *previous_edit = current->previous;
 338                         if(current->startproject -
 339                                 previous_edit->startproject -
 340                                 previous_edit->length > 0)
 341                         {
 342                                 Edit *new_edit = create_edit();
 343                                 insert_before(current, new_edit);
 344                                 new_edit->startproject = previous_edit->startproject + previous_edit->length;
 345                                 new_edit->length = current->startproject -
 346                                         previous_edit->startproject -
 347                                         previous_edit->length;
 348                         }
 349                 }
 350                 else
 351                 if(current->startproject > 0)
 352                 {
 353                         Edit *new_edit = create_edit();
 354                         insert_before(current, new_edit);
 355                         new_edit->length = current->startproject;
 356                 }
 357         }
 358
 359         result = 1;
 360         while(result)
 361         {
 362                 result = 0;
 363
 364
 365 // delete 0 length edits
 366                 for(current = first;
 367                         current != last && !result; )
 368                 {
 369                         if(current->length == 0)
 370                         {
 371                                 Edit* next = current->next;
 372                                 // Be smart with transitions!
 373                                 if (next && current->transition && !next->transition)
 374                                 {
 375                                         next->transition = current->transition;
 376                                         next->transition->edit = next;
 377                                         current->transition = 0;
 378                                 }
 379                                 delete current;
 380                                 result = 1;
 381                                 current = next;
 382                         }
 383                         else
 384                                 current = current->next;
 385                 }
 386
 387 // merge same files or transitions
 388                 for(current = first;
 389                         current && current->next && !result; )
 390                 {
 391 // assets identical
 392                         Edit *next_edit = current->next;
 393                 if(current->asset == next_edit->asset &&
 394                         (!current->asset ||
 395                                         (current->startsource + current->length == next_edit->startsource &&
 396                                 current->channel == next_edit->channel)
 397                                 )
 398                         )
 399                 {
 400 // source positions are consecutive
 401                         current->length += next_edit->length;
 402                         remove(next_edit);
 403                         result = 1;
 404                 }
 405
 406                 current = (Plugin*)current->next;
 407                 }
 408
 409 // delete last edit of 0 length or silence
 410         }
 411         if (!last || !last->silence())
 412         {
 413 // No last empty edit available... create one
 414                 Edit *empty_edit = create_edit();
 415                 if (!last)
 416                         empty_edit->startproject = 0;
 417                 else
 418                         empty_edit->startproject = last->startproject + last->length;
 419                 empty_edit->length = LAST_VIRTUAL_LENGTH;
 420                 insert_after(last, empty_edit);
 421         } else
 422         {
 423                 last->length = LAST_VIRTUAL_LENGTH;
 424         }
 425
 426 //track->dump();
 427         return 0;
 428 }
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449 // ===================================== file operations
 450
 451 int Edits::load(FileXML *file, int track_offset)
 452 {
 453         int result = 0;
 454         int64_t startproject = 0;
 455         while (last)
 456                 delete last;
 457         do{
 458                 result = file->read_tag();
 459
 460 //printf("Edits::load 1 %s\n", file->tag.get_title());
 461                 if(!result)
 462                 {
 463                         if(!strcmp(file->tag.get_title(), "EDIT"))
 464                         {
 465                                 load_edit(file, startproject, track_offset);
 466                         }
 467                         else
 468                         if(!strcmp(file->tag.get_title(), "/EDITS"))
 469                         {
 470                                 result = 1;
 471                         }
 472                 }
 473         }while(!result);
 474
 475         if (last)
 476                 loaded_length = last->startproject + last->length;
 477         else
 478                 loaded_length = 0;
 479 //track->dump();
 480         optimize();
 481 }
 482
 483 int Edits::load_edit(FileXML *file, int64_t &startproject, int track_offset)
 484 {
 485         Edit* current;
 486
 487 //printf("Edits::load_edit 1 %d\n", total());
 488         current = append_new_edit();
 489 //printf("Edits::load_edit 2 %d\n", total());
 490
 491         current->load_properties(file, startproject);
 492
 493         startproject += current->length;
 494
 495         int result = 0;
 496 //printf("Edits::load_edit 1\n");
 497
 498         do{
 499 //printf("Edits::load_edit 2\n");
 500                 result = file->read_tag();
 501 //printf("Edits::load_edit 3 %s\n", file->tag.get_title());
 502
 503                 if(!result)
 504                 {
 505                         if(file->tag.title_is("FILE"))
 506                         {
 507                                 char filename[1024];
 508                                 sprintf(filename, SILENCE);
 509                                 file->tag.get_property("SRC", filename);
 510 // Extend path
 511 //printf("Edits::load_edit 4 %s\n", filename);
 512                                 if(strcmp(filename, SILENCE))
 513                                 {
 514                                         char directory[BCTEXTLEN], edl_directory[BCTEXTLEN];
 515                                         FileSystem fs;
 516                                         fs.set_current_dir("");
 517                                         fs.extract_dir(directory, filename);
 518                                         if(!strlen(directory))
 519                                         {
 520                                                 fs.extract_dir(edl_directory, file->filename);
 521                                                 fs.join_names(directory, edl_directory, filename);
 522                                                 strcpy(filename, directory);
 523                                         }
 524                                         current->asset = edl->assets->get_asset(filename);
 525                                 }
 526                                 else
 527                                 {
 528                                         current->asset = edl->assets->get_asset(SILENCE);
 529                                 }
 530 //printf("Edits::load_edit 5\n");
 531                         }
 532                         else
 533                         if(file->tag.title_is("TRANSITION"))
 534                         {
 535                                 current->transition = new Transition(edl,
 536                                         current,
 537                                         "",
 538                                         track->to_units(edl->session->default_transition_length, 1));
 539                                 current->transition->load_xml(file);
 540                         }
 541                         else
 542                         if(file->tag.title_is(SILENCE))
 543                         {
 544 //printf("Edits::load_edit 6\n");
 545                                 current->asset = edl->assets->get_asset(SILENCE);
 546 //printf("Edits::load_edit 7\n");
 547                         }
 548                         else
 549                         if(file->tag.title_is("/EDIT"))
 550                         {
 551                                 result = 1;
 552                         }
 553                 }
 554 //printf("Edits::load_edit 8\n");
 555         }while(!result);
 556
 557 //printf("Edits::load_edit 5\n");
 558 // in case of incomplete edit tag
 559         if(!current->asset) current->asset = edl->assets->get_asset(SILENCE);
 560         return 0;
 561 }
 562
 563 // ============================================= accounting
 564
 565 int64_t Edits::length()
 566 {
 567         if(last)
 568                 return last->startproject + last->length;
 569         else
 570                 return 0;
 571 }
 572
 573 Edit* Edits::editof(int64_t position, int direction, int use_nudge)
 574 {
 575         Edit *current = 0;
 576         if(use_nudge && track) position += track->nudge;
 577
 578         if(direction == PLAY_FORWARD)
 579         {
 580                 for(current = last; current; current = PREVIOUS)
 581                 {
 582                         if(current->startproject <= position && current->startproject + current->length > position)
 583                                 return current;
 584                 }
 585         }
 586         else
 587         if(direction == PLAY_REVERSE)
 588         {
 589                 for(current = first; current; current = NEXT)
 590                 {
 591                         if(current->startproject < position && current->startproject + current->length >= position)
 592                                 return current;
 593                 }
 594         }
 595
 596         return 0;     // return 0 on failure
 597 }
 598
 599 Edit* Edits::get_playable_edit(int64_t position, int use_nudge)
 600 {
 601         Edit *current;
 602         if(track && use_nudge) position += track->nudge;
 603
 604 // Get the current edit
 605         for(current = first; current; current = NEXT)
 606         {
 607                 if(current->startproject <= position &&
 608                         current->startproject + current->length > position)
 609                         break;
 610         }
 611
 612 // Get the edit's asset
 613         if(current)
 614         {
 615                 if(!current->asset)
 616                         current = 0;
 617         }
 618
 619         return current;     // return 0 on failure
 620 }
 621
 622 // ================================================ editing
 623
 624
 625
 626 int Edits::copy(int64_t start, int64_t end, FileXML *file, char *output_path)
 627 {
 628         Edit *current_edit;
 629
 630         file->tag.set_title("EDITS");
 631         file->append_tag();
 632         file->append_newline();
 633
 634         for(current_edit = first; current_edit; current_edit = current_edit->next)
 635         {
 636                 current_edit->copy(start, end, file, output_path);
 637         }
 638
 639         file->tag.set_title("/EDITS");
 640         file->append_tag();
 641         file->append_newline();
 642 }
 643
 644
 645
 646 void Edits::clear(int64_t start, int64_t end)
 647 {
 648         Edit* edit1 = editof(start, PLAY_FORWARD, 0);
 649         Edit* edit2 = editof(end, PLAY_FORWARD, 0);
 650         Edit* current_edit;
 651
 652         if(end == start) return;        // nothing selected
 653         if(!edit1 && !edit2) return;       // nothing selected
 654
 655
 656         if(!edit2)
 657         {                // edit2 beyond end of track
 658                 edit2 = last;
 659                 end = this->length();
 660         }
 661
 662         if(edit1 != edit2)
 663         {
 664 // in different edits
 665
 666 //printf("Edits::clear 3.5 %d %d %d %d\n", edit1->startproject, edit1->length, edit2->startproject, edit2->length);
 667                 edit1->length = start - edit1->startproject;
 668                 edit2->length -= end - edit2->startproject;
 669                 edit2->startsource += end - edit2->startproject;
 670                 edit2->startproject += end - edit2->startproject;
 671
 672 // delete
 673                 for(current_edit = edit1->next; current_edit && current_edit != edit2;)
 674                 {
 675                         Edit* next = current_edit->next;
 676                         remove(current_edit);
 677                         current_edit = next;
 678                 }
 679 // shift
 680                 for(current_edit = edit2; current_edit; current_edit = current_edit->next)
 681                 {
 682                         current_edit->startproject -= end - start;
 683                 }
 684         }
 685         else
 686         {
 687 // in same edit. paste_edit depends on this
 688 // create a new edit
 689                 current_edit = split_edit(start);
 690
 691                 current_edit->length -= end - start;
 692                 current_edit->startsource += end - start;
 693
 694 // shift
 695                 for(current_edit = current_edit->next;
 696                         current_edit;
 697                         current_edit = current_edit->next)
 698                 {
 699                         current_edit->startproject -= end - start;
 700                 }
 701         }
 702
 703         optimize();
 704 }
 705
 706 // Used by edit handle and plugin handle movement but plugin handle movement
 707 // can only effect other plugins.
 708 void Edits::clear_recursive(int64_t start,
 709         int64_t end,
 710         int edit_edits,
 711         int edit_labels,
 712         int edit_plugins,
 713         Edits *trim_edits)
 714 {
 715 //printf("Edits::clear_recursive 1\n");
 716         track->clear(start,
 717                 end,
 718                 edit_edits,
 719                 edit_labels,
 720                 edit_plugins,
 721                 0,
 722                 trim_edits);
 723 }
 724
 725
 726 int Edits::clear_handle(double start,
 727         double end,
 728         int edit_plugins,
 729         double &distance)
 730 {
 731         Edit *current_edit;
 732
 733         distance = 0.0; // if nothing is found, distance is 0!
 734         for(current_edit = first;
 735                 current_edit && current_edit->next;
 736                 current_edit = current_edit->next)
 737         {
 738
 739
 740
 741                 if(current_edit->asset &&
 742                         current_edit->next->asset)
 743                 {
 744
 745                         if(current_edit->asset->equivalent(*current_edit->next->asset,
 746                                 0,
 747                                 0))
 748                         {
 749
 750 // Got two consecutive edits in same source
 751                                 if(edl->equivalent(track->from_units(current_edit->next->startproject),
 752                                         start))
 753                                 {
 754 // handle selected
 755                                         int length = -current_edit->length;
 756                                         current_edit->length = current_edit->next->startsource - current_edit->startsource;
 757                                         length += current_edit->length;
 758
 759 // Lengthen automation
 760                                         track->automation->paste_silence(current_edit->next->startproject,
 761                                                 current_edit->next->startproject + length);
 762
 763 // Lengthen effects
 764                                         if(edit_plugins)
 765                                                 track->shift_effects(current_edit->next->startproject,
 766                                                         length,
 767                                                         0);
 768
 769                                         for(current_edit = current_edit->next; current_edit; current_edit = current_edit->next)
 770                                         {
 771                                                 current_edit->startproject += length;
 772                                         }
 773
 774                                         distance = track->from_units(length);
 775                                         optimize();
 776                                         break;
 777                                 }
 778                         }
 779                 }
 780         }
 781
 782         return 0;
 783 }
 784
 785 int Edits::modify_handles(double oldposition,
 786         double newposition,
 787         int currentend,
 788         int edit_mode,
 789         int edit_edits,
 790         int edit_labels,
 791         int edit_plugins,
 792         Edits *trim_edits)
 793 {
 794         int result = 0;
 795         Edit *current_edit;
 796
 797 //printf("Edits::modify_handles 1 %d %f %f\n", currentend, newposition, oldposition);
 798         if(currentend == 0)
 799         {
 800 // left handle
 801                 for(current_edit = first; current_edit && !result;)
 802                 {
 803                         if(edl->equivalent(track->from_units(current_edit->startproject),
 804                                 oldposition))
 805                         {
 806 // edit matches selection
 807 //printf("Edits::modify_handles 3 %f %f\n", newposition, oldposition);
 808                                 oldposition = track->from_units(current_edit->startproject);
 809                                 result = 1;
 810
 811                                 if(newposition >= oldposition)
 812                                 {
 813 //printf("Edits::modify_handle 1 %s %f %f\n", track->title, oldposition, newposition);
 814 // shift start of edit in
 815                                         current_edit->shift_start_in(edit_mode,
 816                                                 track->to_units(newposition, 0),
 817                                                 track->to_units(oldposition, 0),
 818                                                 edit_edits,
 819                                                 edit_labels,
 820                                                 edit_plugins,
 821                                                 trim_edits);
 822                                 }
 823                                 else
 824                                 {
 825 //printf("Edits::modify_handle 2 %s\n", track->title);
 826 // move start of edit out
 827                                         current_edit->shift_start_out(edit_mode,
 828                                                 track->to_units(newposition, 0),
 829                                                 track->to_units(oldposition, 0),
 830                                                 edit_edits,
 831                                                 edit_labels,
 832                                                 edit_plugins,
 833                                                 trim_edits);
 834                                 }
 835                         }
 836
 837                         if(!result) current_edit = current_edit->next;
 838                 }
 839         }
 840         else
 841         {
 842 // right handle selected
 843                 for(current_edit = first; current_edit && !result;)
 844                 {
 845                         if(edl->equivalent(track->from_units(current_edit->startproject) +
 846                                 track->from_units(current_edit->length), oldposition))
 847                         {
 848                 oldposition = track->from_units(current_edit->startproject) +
 849                                         track->from_units(current_edit->length);
 850                                 result = 1;
 851
 852 //printf("Edits::modify_handle 3\n");
 853                                 if(newposition <= oldposition)
 854                                 {
 855 // shift end of edit in
 856 //printf("Edits::modify_handle 4\n");
 857                                         current_edit->shift_end_in(edit_mode,
 858                                                 track->to_units(newposition, 0),
 859                                                 track->to_units(oldposition, 0),
 860                                                 edit_edits,
 861                                                 edit_labels,
 862                                                 edit_plugins,
 863                                                 trim_edits);
 864 //printf("Edits::modify_handle 5\n");
 865                                 }
 866                                 else
 867                                 {
 868 // move end of edit out
 869 //printf("Edits::modify_handle 6\n");
 870                                         current_edit->shift_end_out(edit_mode,
 871                                                 track->to_units(newposition, 0),
 872                                                 track->to_units(oldposition, 0),
 873                                                 edit_edits,
 874                                                 edit_labels,
 875                                                 edit_plugins,
 876                                                 trim_edits);
 877 //printf("Edits::modify_handle 7\n");
 878                                 }
 879                         }
 880
 881                         if(!result) current_edit = current_edit->next;
 882 //printf("Edits::modify_handle 8\n");
 883                 }
 884         }
 885
 886         optimize();
 887         return 0;
 888 }
 889
 890
 891 // Paste silence should not return anything - since pasting silence to an empty track should produce no edits
 892 // If we need rutine to create new edit by pushing others forward, write new rutine and call it properly
 893 // This are two distinctive functions
 894 // This rutine leaves edits in optimized state!
 895 void Edits::paste_silence(int64_t start, int64_t end)
 896 {
 897         // paste silence does not do anything if
 898         // a) paste silence is on empty track
 899         // b) paste silence is after last edit
 900         // in both cases editof returns NULL
 901         Edit *new_edit = editof(start, PLAY_FORWARD, 0);
 902         if (!new_edit) return;
 903
 904         if (!new_edit->asset)
 905         { // in this case we extend already existing edit
 906                 new_edit->length += end - start;
 907         } else
 908         { // we are in fact creating a new edit
 909                 new_edit = insert_new_edit(start);
 910                 new_edit->length = end - start;
 911         }
 912         for(Edit *current = new_edit->next; current; current = NEXT)
 913         {
 914                 current->startproject += end - start;
 915         }
 916         return;
 917 }
 918
 919 // Used by other editing commands so don't optimize
 920 // This is separate from paste_silence, since it has to wrok also on empty tracks/beyond end of track
 921 Edit *Edits::create_and_insert_edit(int64_t start, int64_t end)
 922 {
 923         Edit *new_edit = insert_new_edit(start);
 924         new_edit->length = end - start;
 925         for(Edit *current = new_edit->next; current; current = NEXT)
 926         {
 927                 current->startproject += end - start;
 928         }
 929         return new_edit;
 930 }
 931
 932 Edit* Edits::shift(int64_t position, int64_t difference)
 933 {
 934         Edit *new_edit = split_edit(position);
 935
 936         for(Edit *current = first;
 937                 current;
 938                 current = NEXT)
 939         {
 940                 if(current->startproject >= position)
 941                 {
 942                         current->shift(difference);
 943                 }
 944         }
 945         return new_edit;
 946 }
 947
 948
 949 void Edits::shift_keyframes_recursive(int64_t position, int64_t length)
 950 {
 951         track->shift_keyframes(position, length, 0);
 952 }
 953
 954 void Edits::shift_effects_recursive(int64_t position, int64_t length)
 955 {
 956         track->shift_effects(position, length, 0);
 957 }
 958
 959 /*
 960 //      Local Variables:
 961 //      mode: C++
 962 //      c-file-style: "linux"
 963 //      End:
 964 */