rework set default transtion, nested proxy edl fixes, doubleclick proxy media fix...
[goodguy/history.git] / 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