cinelerra-5.1/cinelerra/edits.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008-2017 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "aedit.h"
  23 #include "asset.h"
  24 #include "assets.h"
  25 #include "automation.h"
  26 #include "bcsignals.h"
  27 #include "cache.h"
  28 #include "clip.h"
  29 #include "clipedls.h"
  30 #include "edit.h"
  31 #include "edits.h"
  32 #include "edl.h"
  33 #include "edlsession.h"
  34 #include "file.h"
  35 #include "filexml.h"
  36 #include "filesystem.h"
  37 #include "localsession.h"
  38 #include "plugin.h"
  39 #include "strategies.inc"
  40 #include "track.h"
  41 #include "transition.h"
  42 #include "transportque.inc"
  43
  44 #include <string.h>
  45
  46 Edits::Edits(EDL *edl, Track *track)
  47  : List<Edit>()
  48 {
  49         this->edl = edl;
  50         this->track = track;
  51 }
  52
  53 Edits::~Edits()
  54 {
  55 }
  56
  57
  58 void Edits::equivalent_output(Edits *edits, int64_t *result)
  59 {
  60 // For the case of plugin sets, a new plugin set may be created with
  61 // plugins only starting after 0.  We only want to restart brender at
  62 // the first plugin in this case.
  63         for(Edit *current = first, *that_current = edits->first;
  64                 current || that_current;
  65                 current = NEXT,
  66                 that_current = that_current->next)
  67         {
  68 //printf("Edits::equivalent_output 1 %d\n", *result);
  69                 if(!current && that_current)
  70                 {
  71                         int64_t position1 = length();
  72                         int64_t position2 = that_current->startproject;
  73                         if(*result < 0 || *result > MIN(position1, position2))
  74                                 *result = MIN(position1, position2);
  75                         break;
  76                 }
  77                 else
  78                 if(current && !that_current)
  79                 {
  80                         int64_t position1 = edits->length();
  81                         int64_t position2 = current->startproject;
  82                         if(*result < 0 || *result > MIN(position1, position2))
  83                                 *result = MIN(position1, position2);
  84                         break;
  85                 }
  86                 else
  87                 {
  88 //printf("Edits::equivalent_output 2 %d\n", *result);
  89                         current->equivalent_output(that_current, result);
  90 //printf("Edits::equivalent_output 3 %d\n", *result);
  91                 }
  92         }
  93 }
  94
  95 void Edits::copy_from(Edits *edits)
  96 {
  97         while(last) delete last;
  98         for(Edit *current = edits->first; current; current = NEXT)
  99         {
 100                 Edit *new_edit = append(create_edit());
 101                 new_edit->copy_from(current);
 102         }
 103 }
 104
 105
 106 Edits& Edits::operator=(Edits& edits)
 107 {
 108 printf("Edits::operator= 1\n");
 109         copy_from(&edits);
 110         return *this;
 111 }
 112
 113
 114 void Edits::insert_asset(Asset *asset, EDL *nested_edl,
 115         int64_t length, int64_t position, int track_number)
 116 {
 117         Edit *new_edit = insert_new_edit(position);
 118
 119         new_edit->nested_edl = nested_edl;
 120         new_edit->asset = asset;
 121         new_edit->startsource = 0;
 122         new_edit->startproject = position;
 123         new_edit->length = length;
 124
 125         if(nested_edl)
 126         {
 127                 if(track->data_type == TRACK_AUDIO)
 128                         new_edit->channel = track_number % nested_edl->session->audio_channels;
 129                 else
 130                         new_edit->channel = 0;
 131         }
 132
 133         if(asset && !nested_edl)
 134         {
 135                 if(asset->audio_data)
 136                         new_edit->channel = track_number % asset->channels;
 137                 else
 138                 if(asset->video_data)
 139                         new_edit->channel = track_number % asset->layers;
 140         }
 141
 142 //printf("Edits::insert_asset %d %d\n", new_edit->channel, new_edit->length);
 143         for(Edit *current = new_edit->next; current; current = NEXT)
 144         {
 145                 current->startproject += length;
 146         }
 147 }
 148
 149 void Edits::insert_edits(Edits *source_edits,
 150         int64_t position,
 151         int64_t min_length,
 152         int edit_autos)
 153 {
 154         //int64_t clipboard_end = position + min_length;
 155 // Length pasted so far
 156         int64_t source_len = 0;
 157
 158 // Fill region between end of edit table and beginning of pasted segment
 159 // with silence.  Can't call from insert_new_edit because it's recursive.
 160         if(position > length())
 161         {
 162                 paste_silence(length(), position);
 163         }
 164
 165
 166         for(Edit *source_edit = source_edits->first;
 167                 source_edit;
 168                 source_edit = source_edit->next)
 169         {
 170                 EDL *dest_nested_edl = 0;
 171                 if(source_edit->nested_edl)
 172                         dest_nested_edl = edl->nested_edls.get_nested(source_edit->nested_edl);
 173
 174 // Update Assets
 175                 Asset *dest_asset = 0;
 176                 if(source_edit->asset)
 177                         dest_asset = edl->assets->update(source_edit->asset);
 178 // Open destination area
 179                 Edit *dest_edit = insert_new_edit(position + source_edit->startproject);
 180
 181                 dest_edit->copy_from(source_edit);
 182                 dest_edit->asset = dest_asset;
 183                 dest_edit->nested_edl = dest_nested_edl;
 184                 dest_edit->startproject = position + source_edit->startproject;
 185
 186
 187
 188 // Shift keyframes in source edit to their position in the
 189 // destination edit for plugin case
 190                 if(edit_autos) dest_edit->shift_keyframes(position);
 191
 192 // Shift following edits and keyframes in following edits by length
 193 // in current source edit.
 194                 for(Edit *future_edit = dest_edit->next;
 195                         future_edit;
 196                         future_edit = future_edit->next)
 197                 {
 198                         future_edit->startproject += dest_edit->length;
 199                         future_edit->shift_keyframes(dest_edit->length);
 200                 }
 201
 202                 source_len += source_edit->length;
 203         }
 204
 205
 206
 207
 208 // Fill remaining clipboard length with silence
 209         if(source_len < min_length)
 210         {
 211 //printf("Edits::insert_edits %d\n", __LINE__);
 212                 paste_silence(position + source_len, position + min_length);
 213         }
 214 }
 215
 216
 217 // Native units
 218 // Can't paste silence in here because it's used by paste_silence.
 219 Edit* Edits::insert_new_edit(int64_t position)
 220 {
 221 //printf("Edits::insert_new_edit 1\n");
 222         Edit *current = split_edit(position);
 223         if(current) current = PREVIOUS;
 224
 225 //printf("Edits::insert_new_edit 1\n");
 226         Edit *new_edit = create_edit();
 227 //printf("Edits::insert_new_edit 1\n");
 228         insert_after(current, new_edit);
 229         new_edit->startproject = position;
 230 //printf("Edits::insert_new_edit 2\n");
 231         return new_edit;
 232 }
 233
 234 Edit* Edits::split_edit(int64_t position)
 235 {
 236 // Get edit containing position
 237         Edit *edit = editof(position, PLAY_FORWARD, 0);
 238         if(!edit) return 0;
 239 // Split would have created a 0 length
 240 //      if(edit->startproject == position) return edit;
 241 // Create anyway so the return value comes before position
 242
 243         Edit *new_edit = create_edit();
 244         insert_after(edit, new_edit);
 245         new_edit->copy_from(edit);
 246         new_edit->length = new_edit->startproject + new_edit->length - position;
 247         edit->length = position - edit->startproject;
 248         new_edit->startproject = position;
 249         new_edit->startsource += edit->length;
 250
 251 // Decide what to do with the transition
 252         if(edit->length && edit->transition) {
 253                 delete new_edit->transition;
 254                 new_edit->transition = 0;
 255         }
 256
 257         if(edit->transition && edit->transition->length > edit->length)
 258                 edit->transition->length = edit->length;
 259         if(new_edit->transition && new_edit->transition->length > new_edit->length)
 260                 new_edit->transition->length = new_edit->length;
 261         return new_edit;
 262 }
 263
 264 int Edits::save(FileXML *xml, const char *output_path)
 265 {
 266         copy(0, length(), xml, output_path);
 267         return 0;
 268 }
 269
 270 void Edits::resample(double old_rate, double new_rate)
 271 {
 272         for(Edit *current = first; current; current = NEXT)
 273         {
 274                 current->startproject = Units::to_int64((double)current->startproject /
 275                         old_rate *
 276                         new_rate);
 277                 if(PREVIOUS) PREVIOUS->length = current->startproject - PREVIOUS->startproject;
 278                 current->startsource = Units::to_int64((double)current->startsource /
 279                         old_rate *
 280                         new_rate);
 281                 if(!NEXT) current->length = Units::to_int64((double)current->length /
 282                         old_rate *
 283                         new_rate);
 284                 if(current->transition)
 285                 {
 286                         current->transition->length = Units::to_int64(
 287                                 (double)current->transition->length /
 288                                 old_rate *
 289                                 new_rate);
 290                 }
 291                 current->resample(old_rate, new_rate);
 292         }
 293 }
 294
 295 int Edits::is_glitch(Edit *edit)
 296 {
 297         if( track->data_type != TRACK_AUDIO ) return 0;
 298         int64_t threshold = edl->session->frame_rate > 0 ?
 299                 0.5 * edl->session->sample_rate / edl->session->frame_rate : 0;
 300 // audio edit shorter than .5 frames is a glitch
 301         return edit->length < threshold ? 1 : 0;
 302 }
 303
 304 int Edits::optimize()
 305 {
 306         int result = 1;
 307         Edit *current;
 308
 309 //printf("Edits::optimize %d\n", __LINE__);
 310 // Sort edits by starting point
 311         while(result)
 312         {
 313                 result = 0;
 314
 315                 for(current = first; current; current = NEXT)
 316                 {
 317                         Edit *next_edit = NEXT;
 318
 319                         if(next_edit && next_edit->startproject < current->startproject)
 320                         {
 321                                 swap(next_edit, current);
 322                                 result = 1;
 323                         }
 324                 }
 325         }
 326
 327 // Insert silence between edits which aren't consecutive
 328         for(current = last; current; current = current->previous)
 329         {
 330                 if(current->previous)
 331                 {
 332                         Edit *previous_edit = current->previous;
 333                         if(current->startproject -
 334                                 previous_edit->startproject -
 335                                 previous_edit->length > 0)
 336                         {
 337                                 Edit *new_edit = create_edit();
 338                                 insert_before(current, new_edit);
 339                                 new_edit->startproject = previous_edit->startproject + previous_edit->length;
 340                                 new_edit->length = current->startproject -
 341                                         previous_edit->startproject -
 342                                         previous_edit->length;
 343                         }
 344                 }
 345                 else
 346                 if(current->startproject > 0)
 347                 {
 348                         Edit *new_edit = create_edit();
 349                         insert_before(current, new_edit);
 350                         new_edit->length = current->startproject;
 351                 }
 352         }
 353
 354         result = 1;
 355         while(result) {
 356                 result = 0;
 357
 358 // delete 0 length edits
 359                 for( current = first; !result && current; ) {
 360                         Edit* next = current->next;
 361                         if( current->length == 0 ) {
 362                                 if( next && current->transition && !next->transition) {
 363                                         next->transition = current->transition;
 364                                         next->transition->edit = next;
 365                                         current->transition = 0;
 366                                 }
 367                                 delete current;
 368                                 result = 1;
 369                                 break;
 370                         }
 371                         current = next;
 372                 }
 373
 374 // merge same files or transitions, and deglitch
 375                 if( !result && track->data_type != TRACK_SUBTITLE ) {
 376                         current = first;
 377                         if( current && !current->hard_right &&
 378                             current->next && !current->next->hard_left &&
 379                             is_glitch(current) ) {
 380 // if the first edit is a glitch, change it to silence
 381                                 current->asset = 0;
 382                                 current->nested_edl = 0;
 383                         }
 384                         Edit *next_edit = 0;
 385                         for( ; current && (next_edit=current->next); current=NEXT ) {
 386 // both edges are not hard edges
 387                                 if( current->hard_right || next_edit->hard_left ) continue;
 388 // next edit is a glitch
 389                                 if( is_glitch(next_edit) )
 390                                         break;
 391 // both edits are silence & not a plugin
 392                                 if( !current->is_plugin && current->silence() &&
 393                                     !next_edit->is_plugin && next_edit->silence() )
 394                                         break;
 395 // source channels are identical & assets are identical
 396                                 if( !result && current->channel == next_edit->channel &&
 397                                     current->asset == next_edit->asset &&
 398                                     current->nested_edl == next_edit->nested_edl ) {
 399 //  and stop and start in the same frame
 400                                         int64_t current_end = current->startsource + current->length;
 401                                         int64_t next_start = next_edit->startsource;
 402                                         if( current_end == next_start ||
 403                                             EQUIV(edl->frame_align(track->from_units(current_end), 1),
 404                                                   edl->frame_align(track->from_units(next_start), 1)) )
 405                                                 break;
 406                                 }
 407                         }
 408                         if( next_edit ) {
 409                                 int64_t current_start = current->startproject;
 410                                 int64_t next_end = next_edit->startproject + next_edit->length;
 411                                 current->length = next_end - current_start;
 412                                 remove(next_edit);
 413                                 result = 1;
 414                         }
 415                 }
 416
 417                 if( last && last->silence() && !last->transition ) {
 418                         delete last;
 419                         result = 1;
 420                 }
 421         }
 422
 423         return 0;
 424 }
 425
 426
 427 // ===================================== file operations
 428
 429 void Edits::load(FileXML *file, int track_offset)
 430 {
 431         int64_t startproject = 0;
 432
 433         while( last ) delete last;
 434
 435         while( !file->read_tag() ) {
 436 //printf("Edits::load 1 %s\n", file->tag.get_title());
 437                 if(!strcmp(file->tag.get_title(), "EDIT")) {
 438                         load_edit(file, startproject, track_offset);
 439                 }
 440                 else if(!strcmp(file->tag.get_title(), "/EDITS"))
 441                         break;
 442         }
 443
 444 //track->dump();
 445         optimize();
 446 }
 447
 448 int Edits::load_edit(FileXML *file, int64_t &startproject, int track_offset)
 449 {
 450         Edit* current = append_new_edit();
 451         current->load_properties(file, startproject);
 452
 453         startproject += current->length;
 454
 455         while( !file->read_tag() ) {
 456                 if(file->tag.title_is("NESTED_EDL")) {
 457                         char path[BCTEXTLEN];
 458                         path[0] = 0;
 459                         file->tag.get_property("SRC", path);
 460 //printf("Edits::load_edit %d path=%s\n", __LINE__, path);
 461                         if(path[0] != 0) {
 462                                 current->nested_edl = edl->nested_edls.load(path);
 463                         }
 464 // printf("Edits::load_edit %d nested_edl->path=%s\n",
 465 // __LINE__, current->nested_edl->path);
 466                 }
 467                 else if(file->tag.title_is("FILE")) {
 468                         char filename[BCTEXTLEN];
 469                         filename[0] = 0;
 470                         file->tag.get_property("SRC", filename);
 471 // Extend path
 472                         if(filename[0] != 0) {
 473                                 char directory[BCTEXTLEN], edl_directory[BCTEXTLEN];
 474                                 FileSystem fs;
 475                                 fs.set_current_dir("");
 476                                 fs.extract_dir(directory, filename);
 477                                 if(!strlen(directory)) {
 478                                         fs.extract_dir(edl_directory, file->filename);
 479                                         fs.join_names(directory, edl_directory, filename);
 480                                         strcpy(filename, directory);
 481                                 }
 482                                 current->asset = edl->assets->get_asset(filename);
 483                         }
 484                         else {
 485                                 current->asset = 0;
 486                         }
 487 //printf("Edits::load_edit 5\n");
 488                 }
 489                 else if(file->tag.title_is("TRANSITION")) {
 490                         current->transition = new Transition(edl, current, "",
 491                                 track->to_units(edl->session->default_transition_length, 1));
 492                                 current->transition->load_xml(file);
 493                 }
 494                 else if(file->tag.title_is("/EDIT"))
 495                         break;
 496         }
 497
 498 //printf("Edits::load_edit %d\n", __LINE__);
 499 //track->dump();
 500 //printf("Edits::load_edit %d\n", __LINE__);
 501         return 0;
 502 }
 503
 504 // ============================================= accounting
 505
 506 int64_t Edits::length()
 507 {
 508         return last ? last->startproject + last->length : 0;
 509 }
 510
 511
 512
 513 Edit* Edits::editof(int64_t position, int direction, int use_nudge)
 514 {
 515         Edit *current = 0;
 516         if(use_nudge && track) position += track->nudge;
 517
 518         if(direction == PLAY_FORWARD) {
 519                 for(current = last; current; current = PREVIOUS) {
 520                         if(current->startproject <= position && current->startproject + current->length > position)
 521                                 return current;
 522                 }
 523         }
 524         else
 525         if(direction == PLAY_REVERSE) {
 526                 for(current = first; current; current = NEXT) {
 527                         if(current->startproject < position && current->startproject + current->length >= position)
 528                                 return current;
 529                 }
 530         }
 531
 532         return 0;     // return 0 on failure
 533 }
 534
 535 Edit* Edits::get_playable_edit(int64_t position, int use_nudge)
 536 {
 537         Edit *current;
 538         if(track && use_nudge) position += track->nudge;
 539
 540 // Get the current edit
 541         for(current = first; current; current = NEXT) {
 542                 if(current->startproject <= position &&
 543                         current->startproject + current->length > position)
 544                         break;
 545         }
 546
 547 // Get the edit's asset
 548 // TODO: descend into nested EDLs
 549         if(current) {
 550                 if(!current->asset)
 551                         current = 0;
 552         }
 553
 554         return current;     // return 0 on failure
 555 }
 556
 557 // ================================================ editing
 558
 559
 560
 561 int Edits::copy(int64_t start, int64_t end, FileXML *file, const char *output_path)
 562 {
 563         Edit *current_edit;
 564
 565         file->tag.set_title("EDITS");
 566         file->append_tag();
 567         file->append_newline();
 568
 569         for(current_edit = first; current_edit; current_edit = current_edit->next)
 570         {
 571                 current_edit->copy(start, end, file, output_path);
 572         }
 573
 574         file->tag.set_title("/EDITS");
 575         file->append_tag();
 576         file->append_newline();
 577         return 0;
 578 }
 579
 580
 581
 582 void Edits::clear(int64_t start, int64_t end)
 583 {
 584         if( start >= end ) return;
 585
 586         Edit* edit1 = editof(start, PLAY_FORWARD, 0);
 587         Edit* edit2 = editof(end, PLAY_FORWARD, 0);
 588         Edit* current_edit;
 589
 590         if(end == start) return;        // nothing selected
 591         if(!edit1 && !edit2) return;       // nothing selected
 592
 593
 594         if(!edit2) {                // edit2 beyond end of track
 595                 edit2 = last;
 596                 end = this->length();
 597         }
 598
 599         if( edit1 && edit2 && edit1 != edit2)
 600         {
 601 // in different edits
 602
 603 //printf("Edits::clear 3.5 %d %d %d %d\n", edit1->startproject, edit1->length, edit2->startproject, edit2->length);
 604                 edit1->length = start - edit1->startproject;
 605                 edit2->length -= end - edit2->startproject;
 606                 edit2->startsource += end - edit2->startproject;
 607                 edit2->startproject += end - edit2->startproject;
 608
 609 // delete
 610                 for(current_edit = edit1->next; current_edit && current_edit != edit2;) {
 611                         Edit* next = current_edit->next;
 612                         remove(current_edit);
 613                         current_edit = next;
 614                 }
 615 // shift
 616                 for(current_edit = edit2; current_edit; current_edit = current_edit->next) {
 617                         current_edit->startproject -= end - start;
 618                 }
 619         }
 620         else {
 621 // in same edit. paste_edit depends on this
 622 // create a new edit
 623                 current_edit = split_edit(start);
 624                 if( current_edit ) {
 625                         current_edit->length -= end - start;
 626                         current_edit->startsource += end - start;
 627 // shift
 628                         while( (current_edit=current_edit->next) != 0 ) {
 629                                 current_edit->startproject -= end - start;
 630                         }
 631                 }
 632         }
 633
 634         optimize();
 635 }
 636
 637 // Used by edit handle and plugin handle movement but plugin handle movement
 638 // can only effect other plugins.
 639 void Edits::clear_recursive(int64_t start, int64_t end,
 640         int edit_edits, int edit_labels, int edit_plugins, int edit_autos,
 641         Edits *trim_edits)
 642 {
 643 //printf("Edits::clear_recursive 1\n");
 644         track->clear(start, end,
 645                 edit_edits, edit_labels, edit_plugins, edit_autos, 0,
 646                 trim_edits);
 647 }
 648
 649
 650 int Edits::clear_handle(double start, double end,
 651         int edit_plugins, int edit_autos, double &distance)
 652 {
 653         Edit *current_edit;
 654
 655         distance = 0.0; // if nothing is found, distance is 0!
 656         for(current_edit = first;
 657                 current_edit && current_edit->next;
 658                 current_edit = current_edit->next) {
 659
 660
 661
 662                 if(current_edit->asset && current_edit->next->asset) {
 663
 664                         if(current_edit->asset->equivalent(*current_edit->next->asset, 0, 0, edl)) {
 665
 666 // Got two consecutive edits in same source
 667                                 if(edl->equivalent(track->from_units(current_edit->next->startproject),
 668                                         start)) {
 669 // handle selected
 670                                         int length = -current_edit->length;
 671                                         current_edit->length = current_edit->next->startsource - current_edit->startsource;
 672                                         length += current_edit->length;
 673
 674 // Lengthen automation
 675                                         if(edit_autos)
 676                                                 track->automation->paste_silence(current_edit->next->startproject,
 677                                                         current_edit->next->startproject + length);
 678
 679 // Lengthen effects
 680                                         if(edit_plugins)
 681                                                 track->shift_effects(current_edit->next->startproject,
 682                                                         length,
 683                                                         edit_autos);
 684
 685                                         for(current_edit = current_edit->next; current_edit; current_edit = current_edit->next)
 686                                         {
 687                                                 current_edit->startproject += length;
 688                                         }
 689
 690                                         distance = track->from_units(length);
 691                                         optimize();
 692                                         break;
 693                                 }
 694                         }
 695                 }
 696         }
 697
 698         return 0;
 699 }
 700
 701 int Edits::modify_handles(double oldposition, double newposition, int currentend,
 702         int edit_mode, int edit_edits, int edit_labels, int edit_plugins, int edit_autos,
 703         Edits *trim_edits)
 704 {
 705         int result = 0;
 706         Edit *current_edit;
 707
 708 //printf("Edits::modify_handles 1 %d %f %f\n", currentend, newposition, oldposition);
 709         if(currentend == 0) {
 710 // left handle
 711                 for(current_edit = first; current_edit && !result;) {
 712                         if(edl->equivalent(track->from_units(current_edit->startproject),
 713                                 oldposition)) {
 714 // edit matches selection
 715 //printf("Edits::modify_handles 3 %f %f\n", newposition, oldposition);
 716                                 oldposition = track->from_units(current_edit->startproject);
 717                                 result = 1;
 718
 719                                 if(newposition >= oldposition) {
 720 //printf("Edits::modify_handle 1 %s %f %f\n", track->title, oldposition, newposition);
 721 // shift start of edit in
 722                                         current_edit->shift_start_in(edit_mode,
 723                                                 track->to_units(newposition, 0),
 724                                                 track->to_units(oldposition, 0),
 725                                                 edit_edits,
 726                                                 edit_labels,
 727                                                 edit_plugins,
 728                                                 edit_autos,
 729                                                 trim_edits);
 730                                 }
 731                                 else
 732                                 {
 733 //printf("Edits::modify_handle 2 %s\n", track->title);
 734 // move start of edit out
 735                                         current_edit->shift_start_out(edit_mode,
 736                                                 track->to_units(newposition, 0),
 737                                                 track->to_units(oldposition, 0),
 738                                                 edit_edits,
 739                                                 edit_labels,
 740                                                 edit_plugins,
 741                                                 edit_autos,
 742                                                 trim_edits);
 743                                 }
 744                         }
 745
 746                         if(!result) current_edit = current_edit->next;
 747                 }
 748         }
 749         else {
 750 // right handle selected
 751                 for(current_edit = first; current_edit && !result;) {
 752                         if(edl->equivalent(track->from_units(current_edit->startproject) +
 753                                 track->from_units(current_edit->length), oldposition)) {
 754                 oldposition = track->from_units(current_edit->startproject) +
 755                                         track->from_units(current_edit->length);
 756                                 result = 1;
 757
 758 //printf("Edits::modify_handle 3\n");
 759                                 if(newposition <= oldposition) {
 760 // shift end of edit in
 761 //printf("Edits::modify_handle 4\n");
 762                                         current_edit->shift_end_in(edit_mode,
 763                                                 track->to_units(newposition, 0),
 764                                                 track->to_units(oldposition, 0),
 765                                                 edit_edits,
 766                                                 edit_labels,
 767                                                 edit_plugins,
 768                                                 edit_autos,
 769                                                 trim_edits);
 770 //printf("Edits::modify_handle 5\n");
 771                                 }
 772                                 else
 773                                 {
 774 // move end of edit out
 775 //printf("Edits::modify_handle %d edit_mode=%d\n", __LINE__, edit_mode);
 776                                         current_edit->shift_end_out(edit_mode,
 777                                                 track->to_units(newposition, 0),
 778                                                 track->to_units(oldposition, 0),
 779                                                 edit_edits,
 780                                                 edit_labels,
 781                                                 edit_plugins,
 782                                                 edit_autos,
 783                                                 trim_edits);
 784 //printf("Edits::modify_handle 7\n");
 785                                 }
 786                         }
 787
 788                         if(!result) current_edit = current_edit->next;
 789 //printf("Edits::modify_handle 8\n");
 790                 }
 791         }
 792
 793         optimize();
 794         return 0;
 795 }
 796
 797
 798 void Edits::paste_silence(int64_t start, int64_t end)
 799 {
 800         Edit *new_edit = editof(start, PLAY_FORWARD, 0);
 801         if (!new_edit) return;
 802
 803         if( !new_edit->silence() ) {
 804                 new_edit = insert_new_edit(start);
 805                 new_edit->length = end - start;
 806         }
 807         else
 808                 new_edit->length += end - start;
 809
 810         for(Edit *current = new_edit->next; current; current = NEXT) {
 811                 current->startproject += end - start;
 812         }
 813
 814         return;
 815 }
 816
 817 Edit *Edits::create_silence(int64_t start, int64_t end)
 818 {
 819         Edit *new_edit = insert_new_edit(start);
 820         new_edit->length = end - start;
 821         for(Edit *current = new_edit->next; current; current = NEXT) {
 822                 current->startproject += end - start;
 823         }
 824         return new_edit;
 825 }
 826
 827 Edit* Edits::shift(int64_t position, int64_t difference)
 828 {
 829         Edit *new_edit = split_edit(position);
 830
 831         for(Edit *current = first; current; current = NEXT) {
 832                 if(current->startproject >= position) {
 833                         current->shift(difference);
 834                 }
 835         }
 836         return new_edit;
 837 }
 838
 839
 840 void Edits::shift_keyframes_recursive(int64_t position, int64_t length)
 841 {
 842         track->shift_keyframes(position, length);
 843 }
 844
 845 void Edits::shift_effects_recursive(int64_t position, int64_t length, int edit_autos)
 846 {
 847         track->shift_effects(position, length, edit_autos);
 848 }
 849