File: ges-clip.c

package info (click to toggle)
gstreamer-editing-services1.0 1.14.4-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster
  • size: 8,388 kB
  • sloc: ansic: 43,396; sh: 4,773; perl: 1,583; makefile: 1,172; python: 581; xml: 80; lex: 44
file content (1680 lines) | stat: -rw-r--r-- 51,259 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
/* GStreamer Editing Services
 * Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
 *               2009 Nokia Corporation
 *               2012 Collabora Ltd.
 *                 Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

/**
 * SECTION:gesclip
 * @title: GESClip
 * @short_description: Base Class for objects in a GESLayer
 *
 * A #GESClip is a 'natural' object which controls one or more
 * #GESTrackElement(s) in one or more #GESTrack(s).
 *
 * Keeps a reference to the #GESTrackElement(s) it created and
 * sets/updates their properties.
 */

#include "ges-clip.h"
#include "ges.h"
#include "ges-internal.h"

#include <string.h>

static GList *ges_clip_create_track_elements_func (GESClip * clip,
    GESTrackType type);
static gboolean _ripple (GESTimelineElement * element, GstClockTime start);
static gboolean _ripple_end (GESTimelineElement * element, GstClockTime end);
static gboolean _roll_start (GESTimelineElement * element, GstClockTime start);
static gboolean _roll_end (GESTimelineElement * element, GstClockTime end);
static gboolean _trim (GESTimelineElement * element, GstClockTime start);
static void _compute_height (GESContainer * container);

G_DEFINE_ABSTRACT_TYPE (GESClip, ges_clip, GES_TYPE_CONTAINER);

typedef enum
{
  GES_CLIP_IS_SPLITTING = (1 << 0),
  GES_CLIP_IS_MOVING = (1 << 1),
} GESClipFlags;

#define FLAGS(obj)             (GES_CLIP(obj)->priv->flags)
#define SET_FLAG(obj,flag)     (FLAGS(obj) |= (flag))
#define UNSET_FLAG(obj,flag)   (FLAGS(obj) &= ~(flag))
#define FLAG_IS_SET(obj,flag)  (FLAGS(obj) == (flag))

struct _GESClipPrivate
{
  /*< public > */
  GESLayer *layer;

  /*< private > */

  /* Set to TRUE when the clip is doing updates of track element
   * properties so we don't end up in infinite property update loops
   */
  GESClipFlags flags;

  guint nb_effects;

  GList *copied_track_elements;
  GESLayer *copied_layer;

  /* The formats supported by this Clip */
  GESTrackType supportedformats;
};

typedef struct _CheckTrack
{
  GESTrack *track;
  GESTrackElement *source;
} CheckTrack;

enum
{
  PROP_0,
  PROP_LAYER,
  PROP_SUPPORTED_FORMATS,
  PROP_LAST
};

static GParamSpec *properties[PROP_LAST];

/****************************************************
 *              Listen to our children              *
 ****************************************************/

/* @min_priority: The absolute minimum priority a child of @container should have
 * @max_priority: The absolute maximum priority a child of @container should have
 */
static void
_get_priority_range (GESContainer * container, guint32 * min_priority,
    guint32 * max_priority)
{
  GESLayer *layer = GES_CLIP (container)->priv->layer;

  if (layer) {
    *min_priority = _PRIORITY (container) + layer->min_nle_priority;
    *max_priority = layer->max_nle_priority;
  } else {
    *min_priority = _PRIORITY (container) + MIN_NLE_PRIO;
    *max_priority = G_MAXUINT32;
  }
}

static void
_child_priority_changed_cb (GESTimelineElement * child,
    GParamSpec * arg G_GNUC_UNUSED, GESContainer * container)
{
  guint32 min_prio, max_prio;

  GST_DEBUG_OBJECT (container, "TimelineElement %p priority changed to %i",
      child, _PRIORITY (child));

  if (container->children_control_mode == GES_CHILDREN_IGNORE_NOTIFIES)
    return;

  /* Update mapping */
  _get_priority_range (container, &min_prio, &max_prio);

  _ges_container_set_priority_offset (container, child,
      min_prio - _PRIORITY (child));
}

/*****************************************************
 *                                                   *
 * GESTimelineElement virtual methods implementation *
 *                                                   *
 *****************************************************/

static gboolean
_set_start (GESTimelineElement * element, GstClockTime start)
{
  GList *tmp;
  GESTimeline *timeline;
  GESContainer *container = GES_CONTAINER (element);

  GST_DEBUG_OBJECT (element, "Setting children start, (initiated_move: %"
      GST_PTR_FORMAT ")", container->initiated_move);

  element->start = start;
  g_object_notify (G_OBJECT (element), "start");
  container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
  for (tmp = container->children; tmp; tmp = g_list_next (tmp)) {
    GESTimelineElement *child = (GESTimelineElement *) tmp->data;

    if (child != container->initiated_move) {
      /* Make the snapping happen if in a timeline */
      timeline = GES_TIMELINE_ELEMENT_TIMELINE (child);
      if (timeline && !container->initiated_move) {
        if (ges_timeline_move_object_simple (timeline, child, NULL,
                GES_EDGE_NONE, start))
          continue;
      }

      _set_start0 (GES_TIMELINE_ELEMENT (child), start);
    }
  }
  container->children_control_mode = GES_CHILDREN_UPDATE;

  return FALSE;
}

static gboolean
_set_inpoint (GESTimelineElement * element, GstClockTime inpoint)
{
  GList *tmp;
  GESContainer *container = GES_CONTAINER (element);

  container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
  for (tmp = container->children; tmp; tmp = g_list_next (tmp)) {
    GESTimelineElement *child = (GESTimelineElement *) tmp->data;

    if (child != container->initiated_move) {
      _set_inpoint0 (child, inpoint);
    }
  }
  container->children_control_mode = GES_CHILDREN_UPDATE;

  return TRUE;
}

static gboolean
_set_duration (GESTimelineElement * element, GstClockTime duration)
{
  GList *tmp;
  GESTimeline *timeline;

  GESContainer *container = GES_CONTAINER (element);

  container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
  for (tmp = container->children; tmp; tmp = g_list_next (tmp)) {
    GESTimelineElement *child = (GESTimelineElement *) tmp->data;

    if (child != container->initiated_move) {
      /* Make the snapping happen if in a timeline */
      timeline = GES_TIMELINE_ELEMENT_TIMELINE (child);
      if (timeline == NULL || FLAG_IS_SET (element, GES_CLIP_IS_SPLITTING) ||
          (ges_timeline_trim_object_simple (timeline, child,
                  NULL, GES_EDGE_END, _START (child) + duration,
                  TRUE) == FALSE)) {
        _set_duration0 (GES_TIMELINE_ELEMENT (child), duration);
      }
    }
  }
  container->children_control_mode = GES_CHILDREN_UPDATE;

  return TRUE;
}

static gboolean
_set_max_duration (GESTimelineElement * element, GstClockTime maxduration)
{
  GList *tmp;

  for (tmp = GES_CONTAINER (element)->children; tmp; tmp = g_list_next (tmp))
    ges_timeline_element_set_max_duration (GES_TIMELINE_ELEMENT (tmp->data),
        maxduration);

  return TRUE;
}

static gboolean
_set_priority (GESTimelineElement * element, guint32 priority)
{
  GList *tmp;
  guint32 min_prio, max_prio;

  GESContainer *container = GES_CONTAINER (element);

  _get_priority_range (container, &min_prio, &max_prio);

  container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
  for (tmp = container->children; tmp; tmp = g_list_next (tmp)) {
    guint32 track_element_prio;
    GESTimelineElement *child = (GESTimelineElement *) tmp->data;
    gint off = _ges_container_get_priority_offset (container, child);


    if (off >= LAYER_HEIGHT) {
      GST_ERROR ("%s child %s as a priority offset %d >= LAYER_HEIGHT %d"
          " ==> clamping it to 0", GES_TIMELINE_ELEMENT_NAME (element),
          GES_TIMELINE_ELEMENT_NAME (child), off, LAYER_HEIGHT);
      off = 0;
    }

    /* We need to remove our current priority from @min_prio
     * as it is the absolute minimum priority @child could have
     * before we set @container to @priority.
     */
    track_element_prio = min_prio - _PRIORITY (container) + priority - off;

    if (track_element_prio > max_prio) {
      GST_WARNING ("%p priority of %i, is outside of the its containing "
          "layer space. (%d/%d) setting it to the maximum it can be",
          container, priority, min_prio - _PRIORITY (container) + priority,
          max_prio);

      track_element_prio = max_prio;
    }
    _set_priority0 (child, track_element_prio);
  }
  container->children_control_mode = GES_CHILDREN_UPDATE;
  _compute_height (container);

  return TRUE;
}

/****************************************************
 *                                                  *
 *  GESContainer virtual methods implementation     *
 *                                                  *
 ****************************************************/

static void
_compute_height (GESContainer * container)
{
  GList *tmp;
  guint32 min_prio = G_MAXUINT32, max_prio = 0;

  if (container->children == NULL) {
    /* FIXME Why not 0! */
    _ges_container_set_height (container, 1);
    return;
  }

  /* Go over all childs and check if height has changed */
  for (tmp = container->children; tmp; tmp = tmp->next) {
    guint tck_priority = _PRIORITY (tmp->data);

    if (tck_priority < min_prio)
      min_prio = tck_priority;
    if (tck_priority > max_prio)
      max_prio = tck_priority;
  }

  _ges_container_set_height (container, max_prio - min_prio + 1);
}

static gboolean
_add_child (GESContainer * container, GESTimelineElement * element)
{
  GList *tmp;
  guint max_prio, min_prio;
  GESClipPrivate *priv = GES_CLIP (container)->priv;

  g_return_val_if_fail (GES_IS_TRACK_ELEMENT (element), FALSE);

  /* First make sure we work with a sorted list of GESTimelineElement-s */
  _ges_container_sort_children (container);

  /* If the TrackElement is an effect:
   *  - We add it on top of the list of TrackEffect
   *  - We put all TrackElements present in the Clip
   *    which are not BaseEffect on top of them
   * FIXME: Let the full control over priorities to the user
   */
  _get_priority_range (container, &min_prio, &max_prio);
  if (GES_IS_BASE_EFFECT (element)) {
    GESChildrenControlMode mode = container->children_control_mode;

    GST_DEBUG_OBJECT (container, "Adding %ith effect: %" GST_PTR_FORMAT
        " Priority %i", priv->nb_effects + 1, element,
        min_prio + priv->nb_effects);

    tmp = g_list_nth (GES_CONTAINER_CHILDREN (container), priv->nb_effects);
    container->children_control_mode = GES_CHILDREN_UPDATE_OFFSETS;
    for (; tmp; tmp = tmp->next) {
      ges_timeline_element_set_priority (GES_TIMELINE_ELEMENT (tmp->data),
          GES_TIMELINE_ELEMENT_PRIORITY (tmp->data) + 1);
    }

    _set_priority0 (element, min_prio + priv->nb_effects);
    container->children_control_mode = mode;
    priv->nb_effects++;
  } else {
    /* We add the track element on top of the effect list */
    _set_priority0 (element, min_prio + priv->nb_effects);
  }

  /* We set the timing value of the child to ours, we avoid infinite loop
   * making sure the container ignore notifies from the child */
  container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
  _set_start0 (element, GES_TIMELINE_ELEMENT_START (container));
  _set_inpoint0 (element, GES_TIMELINE_ELEMENT_INPOINT (container));
  _set_duration0 (element, GES_TIMELINE_ELEMENT_DURATION (container));
  container->children_control_mode = GES_CHILDREN_UPDATE;

  return TRUE;
}

static gboolean
_remove_child (GESContainer * container, GESTimelineElement * element)
{
  if (GES_IS_BASE_EFFECT (element)) {
    GList *tmp;
    GESChildrenControlMode mode = container->children_control_mode;

    GST_DEBUG_OBJECT (container, "Resyncing effects priority.");

    container->children_control_mode = GES_CHILDREN_UPDATE_OFFSETS;
    tmp = g_list_find (GES_CONTAINER_CHILDREN (container), element);
    for (tmp = tmp->next; tmp; tmp = tmp->next) {
      ges_timeline_element_set_priority (GES_TIMELINE_ELEMENT (tmp->data),
          GES_TIMELINE_ELEMENT_PRIORITY (tmp->data) - 1);
    }
    container->children_control_mode = mode;
    GES_CLIP (container)->priv->nb_effects--;
  }

  GST_FIXME_OBJECT (container, "We should set other children prios");

  return TRUE;
}

static void
_child_added (GESContainer * container, GESTimelineElement * element)
{
  g_signal_connect (G_OBJECT (element), "notify::priority",
      G_CALLBACK (_child_priority_changed_cb), container);

  _child_priority_changed_cb (element, NULL, container);
  _compute_height (container);
}

static void
_child_removed (GESContainer * container, GESTimelineElement * element)
{
  g_signal_handlers_disconnect_by_func (element, _child_priority_changed_cb,
      container);

  _compute_height (container);
}

static void
add_clip_to_list (gpointer key, gpointer clip, GList ** list)
{
  *list = g_list_prepend (*list, gst_object_ref (clip));
}

static GList *
_ungroup (GESContainer * container, gboolean recursive)
{
  GESClip *tmpclip;
  GESTrackType track_type;
  GESTrackElement *track_element;

  gboolean first_obj = TRUE;
  GList *tmp, *children, *ret = NULL;
  GESClip *clip = GES_CLIP (container);
  GESTimelineElement *element = GES_TIMELINE_ELEMENT (container);
  GESLayer *layer = clip->priv->layer;
  GHashTable *_tracktype_clip = g_hash_table_new (g_int_hash, g_int_equal);

  /* If there is no TrackElement, just return @container in a list */
  if (GES_CONTAINER_CHILDREN (container) == NULL) {
    GST_DEBUG ("No TrackElement, simply returning");
    return g_list_prepend (ret, container);
  }

  /* We need a copy of the current list of tracks */
  children = ges_container_get_children (container, FALSE);
  for (tmp = children; tmp; tmp = tmp->next) {
    track_element = GES_TRACK_ELEMENT (tmp->data);
    track_type = ges_track_element_get_track_type (track_element);

    tmpclip = g_hash_table_lookup (_tracktype_clip, &track_type);
    if (tmpclip == NULL) {
      if (G_UNLIKELY (first_obj == TRUE)) {
        tmpclip = clip;
        first_obj = FALSE;
      } else {
        tmpclip = GES_CLIP (ges_timeline_element_copy (element, FALSE));
        if (layer) {
          /* Add new container to the same layer as @container */
          ges_clip_set_moving_from_layer (tmpclip, TRUE);
          ges_layer_add_clip (layer, tmpclip);
          ges_clip_set_moving_from_layer (tmpclip, FALSE);
        }
      }

      g_hash_table_insert (_tracktype_clip, &track_type, tmpclip);
      ges_clip_set_supported_formats (tmpclip, track_type);
    }

    /* Move trackelement to the container it is supposed to land into */
    if (tmpclip != clip) {
      /* We need to bump the refcount to avoid the object to be destroyed */
      gst_object_ref (track_element);
      ges_container_remove (container, GES_TIMELINE_ELEMENT (track_element));
      ges_container_add (GES_CONTAINER (tmpclip),
          GES_TIMELINE_ELEMENT (track_element));
      gst_object_unref (track_element);
    }
  }
  g_list_free_full (children, gst_object_unref);
  g_hash_table_foreach (_tracktype_clip, (GHFunc) add_clip_to_list, &ret);
  g_hash_table_unref (_tracktype_clip);

  return ret;
}

static GESContainer *
_group (GList * containers)
{
  CheckTrack *tracks = NULL;
  GESTimeline *timeline = NULL;
  GESTrackType supported_formats;
  GESLayer *layer = NULL;
  GList *tmp, *tmpclip, *tmpelement;
  GstClockTime start, inpoint, duration;

  GESAsset *asset = NULL;
  GESContainer *ret = NULL;
  guint nb_tracks = 0, i = 0;

  start = inpoint = duration = GST_CLOCK_TIME_NONE;

  if (!containers)
    return NULL;

  /* First check if all the containers are clips, if they
   * all have the same start/inpoint/duration and are in the same
   * layer.
   *
   * We also need to make sure that all source have been created by the
   * same asset, keep the information */
  for (tmp = containers; tmp; tmp = tmp->next) {
    GESClip *clip;
    GESTimeline *tmptimeline;
    GESContainer *tmpcontainer;
    GESTimelineElement *element;

    tmpcontainer = GES_CONTAINER (tmp->data);
    element = GES_TIMELINE_ELEMENT (tmp->data);
    if (GES_IS_CLIP (element) == FALSE) {
      GST_DEBUG ("Can only work with clips");
      goto done;
    }
    clip = GES_CLIP (tmp->data);
    tmptimeline = GES_TIMELINE_ELEMENT_TIMELINE (element);
    if (!timeline) {
      GList *tmptrack;

      start = _START (tmpcontainer);
      inpoint = _INPOINT (tmpcontainer);
      duration = _DURATION (tmpcontainer);
      timeline = tmptimeline;
      layer = clip->priv->layer;
      nb_tracks = g_list_length (GES_TIMELINE_GET_TRACKS (timeline));
      tracks = g_new0 (CheckTrack, nb_tracks);

      for (tmptrack = GES_TIMELINE_GET_TRACKS (timeline); tmptrack;
          tmptrack = tmptrack->next) {
        tracks[i].track = tmptrack->data;
        i++;
      }
    } else {
      if (start != _START (tmpcontainer) ||
          inpoint != _INPOINT (tmpcontainer) ||
          duration != _DURATION (tmpcontainer) || clip->priv->layer != layer) {
        GST_INFO ("All children must have the same start, inpoint, duration "
            " and be in the same layer");

        goto done;
      } else {
        GList *tmp2;

        for (tmp2 = GES_CONTAINER_CHILDREN (tmp->data); tmp2; tmp2 = tmp2->next) {
          GESTrackElement *track_element = GES_TRACK_ELEMENT (tmp2->data);

          if (GES_IS_SOURCE (track_element)) {
            guint i;

            for (i = 0; i < nb_tracks; i++) {
              if (tracks[i].track ==
                  ges_track_element_get_track (track_element)) {
                if (tracks[i].source) {
                  GST_INFO ("Can not link clips with various source for a "
                      "same track");

                  goto done;
                }
                tracks[i].source = track_element;
                break;
              }
            }
          }
        }
      }
    }
  }


  /* Then check that all sources have been created by the same asset,
   * otherwise we can not group */
  for (i = 0; i < nb_tracks; i++) {
    if (tracks[i].source == NULL) {
      GST_FIXME ("Check what to do here as we might end up having a mess");

      continue;
    }

    /* FIXME Check what to do if we have source that have no assets */
    if (!asset) {
      asset =
          ges_extractable_get_asset (GES_EXTRACTABLE
          (ges_timeline_element_get_parent (GES_TIMELINE_ELEMENT (tracks
                      [i].source))));
      continue;
    }
    if (asset !=
        ges_extractable_get_asset (GES_EXTRACTABLE
            (ges_timeline_element_get_parent (GES_TIMELINE_ELEMENT (tracks
                        [i].source))))) {
      GST_INFO ("Can not link clips with source coming from different assets");

      goto done;
    }
  }

  /* And now pass all TrackElements to the first clip,
   * and remove others from the layer (updating the supported formats) */
  ret = containers->data;
  supported_formats = GES_CLIP (ret)->priv->supportedformats;
  for (tmpclip = containers->next; tmpclip; tmpclip = tmpclip->next) {
    GESClip *cclip = tmpclip->data;
    GList *children = ges_container_get_children (GES_CONTAINER (cclip), FALSE);

    for (tmpelement = children; tmpelement; tmpelement = tmpelement->next) {
      GESTimelineElement *celement = GES_TIMELINE_ELEMENT (tmpelement->data);

      ges_container_remove (GES_CONTAINER (cclip), celement);
      ges_container_add (ret, celement);

      supported_formats = supported_formats |
          ges_track_element_get_track_type (GES_TRACK_ELEMENT (celement));
    }
    g_list_free_full (children, gst_object_unref);

    ges_layer_remove_clip (layer, tmpclip->data);
  }

  ges_clip_set_supported_formats (GES_CLIP (ret), supported_formats);

done:
  if (tracks)
    g_free (tracks);


  return ret;

}

static gboolean
_edit (GESContainer * container, GList * layers,
    gint new_layer_priority, GESEditMode mode, GESEdge edge, guint64 position)
{
  GList *tmp;
  gboolean ret = TRUE;
  GESLayer *layer;

  if (!G_UNLIKELY (GES_CONTAINER_CHILDREN (container))) {
    GST_WARNING_OBJECT (container, "Trying to edit, but not containing"
        "any TrackElement yet.");
    return FALSE;
  }

  for (tmp = GES_CONTAINER_CHILDREN (container); tmp; tmp = g_list_next (tmp)) {
    if (GES_IS_SOURCE (tmp->data) || GES_IS_TRANSITION (tmp->data)) {
      ret &= ges_track_element_edit (tmp->data, layers, mode, edge, position);
      break;
    }
  }

  /* Moving to layer */
  if (new_layer_priority == -1) {
    GST_DEBUG_OBJECT (container, "Not moving new prio %d", new_layer_priority);
  } else {
    gint priority_offset;

    layer = GES_CLIP (container)->priv->layer;
    if (layer == NULL) {
      GST_WARNING_OBJECT (container, "Not in any layer yet, not moving");

      return FALSE;
    }
    priority_offset = new_layer_priority - ges_layer_get_priority (layer);

    ret &= timeline_context_to_layer (layer->timeline, priority_offset);
  }

  return ret;
}

static void
_deep_copy (GESTimelineElement * element, GESTimelineElement * copy)
{
  GList *tmp;
  GESClip *self = GES_CLIP (element), *ccopy = GES_CLIP (copy);

  for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) {
    ccopy->priv->copied_track_elements =
        g_list_append (ccopy->priv->copied_track_elements,
        ges_timeline_element_copy (tmp->data, TRUE));
  }

  if (self->priv->copied_layer)
    ccopy->priv->copied_layer = g_object_ref (self->priv->copied_layer);
  else if (self->priv->layer)
    ccopy->priv->copied_layer = g_object_ref (self->priv->layer);
}

static GESTimelineElement *
_paste (GESTimelineElement * element, GESTimelineElement * ref,
    GstClockTime paste_position)
{
  GList *tmp;
  GESClip *self = GES_CLIP (element);
  GESClip *nclip = GES_CLIP (ges_timeline_element_copy (element, FALSE));

  if (self->priv->copied_layer)
    nclip->priv->copied_layer = g_object_ref (self->priv->copied_layer);

  ges_clip_set_moving_from_layer (nclip, TRUE);
  if (self->priv->copied_layer)
    ges_layer_add_clip (self->priv->copied_layer, nclip);
  ges_clip_set_moving_from_layer (nclip, FALSE);

  ges_timeline_element_set_start (GES_TIMELINE_ELEMENT (nclip), paste_position);

  for (tmp = self->priv->copied_track_elements; tmp; tmp = tmp->next) {
    GESTrackElement *new_trackelement, *trackelement =
        GES_TRACK_ELEMENT (tmp->data);

    new_trackelement =
        GES_TRACK_ELEMENT (ges_timeline_element_copy (GES_TIMELINE_ELEMENT
            (trackelement), FALSE));
    if (new_trackelement == NULL) {
      GST_WARNING_OBJECT (trackelement, "Could not create a copy");
      continue;
    }

    ges_container_add (GES_CONTAINER (nclip),
        GES_TIMELINE_ELEMENT (new_trackelement));

    ges_track_element_copy_properties (GES_TIMELINE_ELEMENT (trackelement),
        GES_TIMELINE_ELEMENT (new_trackelement));

    ges_track_element_copy_bindings (trackelement, new_trackelement,
        GST_CLOCK_TIME_NONE);
  }

  return GES_TIMELINE_ELEMENT (nclip);
}

static gboolean
_lookup_child (GESTimelineElement * self, const gchar * prop_name,
    GObject ** child, GParamSpec ** pspec)
{
  GList *tmp;

  if (GES_TIMELINE_ELEMENT_CLASS (ges_clip_parent_class)->lookup_child (self,
          prop_name, child, pspec))
    return TRUE;

  for (tmp = GES_CONTAINER_CHILDREN (self); tmp; tmp = tmp->next) {
    if (ges_timeline_element_lookup_child (tmp->data, prop_name, child, pspec))
      return TRUE;
  }

  return FALSE;
}

/****************************************************
 *                                                  *
 *    GObject virtual methods implementation        *
 *                                                  *
 ****************************************************/
static void
ges_clip_get_property (GObject * object, guint property_id,
    GValue * value, GParamSpec * pspec)
{
  GESClip *clip = GES_CLIP (object);

  switch (property_id) {
    case PROP_LAYER:
      g_value_set_object (value, clip->priv->layer);
      break;
    case PROP_SUPPORTED_FORMATS:
      g_value_set_flags (value, clip->priv->supportedformats);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  }
}

static void
ges_clip_set_property (GObject * object, guint property_id,
    const GValue * value, GParamSpec * pspec)
{
  GESClip *clip = GES_CLIP (object);

  switch (property_id) {
    case PROP_SUPPORTED_FORMATS:
      ges_clip_set_supported_formats (clip, g_value_get_flags (value));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  }
}

static void
ges_clip_finalize (GObject * object)
{
  GESClip *self = GES_CLIP (object);

  g_list_free_full (self->priv->copied_track_elements, g_object_unref);

  G_OBJECT_CLASS (ges_clip_parent_class)->finalize (object);
}

static void
ges_clip_class_init (GESClipClass * klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);
  GESContainerClass *container_class = GES_CONTAINER_CLASS (klass);
  GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);

  g_type_class_add_private (klass, sizeof (GESClipPrivate));

  object_class->get_property = ges_clip_get_property;
  object_class->set_property = ges_clip_set_property;
  object_class->finalize = ges_clip_finalize;
  klass->create_track_elements = ges_clip_create_track_elements_func;
  klass->create_track_element = NULL;

  /**
   * GESClip:supported-formats:
   *
   * The formats supported by the clip.
   */
  properties[PROP_SUPPORTED_FORMATS] = g_param_spec_flags ("supported-formats",
      "Supported formats", "Formats supported by the file",
      GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_AUDIO | GES_TRACK_TYPE_VIDEO,
      G_PARAM_READWRITE | G_PARAM_CONSTRUCT);

  g_object_class_install_property (object_class, PROP_SUPPORTED_FORMATS,
      properties[PROP_SUPPORTED_FORMATS]);

  /**
   * GESClip:layer:
   *
   * The GESLayer where this clip is being used. If you want to connect to its
   * notify signal you should connect to it with g_signal_connect_after as the
   * signal emission can be stop in the first fase.
   */
  properties[PROP_LAYER] = g_param_spec_object ("layer", "Layer",
      "The GESLayer where this clip is being used.",
      GES_TYPE_LAYER, G_PARAM_READABLE);
  g_object_class_install_property (object_class, PROP_LAYER,
      properties[PROP_LAYER]);

  element_class->ripple = _ripple;
  element_class->ripple_end = _ripple_end;
  element_class->roll_start = _roll_start;
  element_class->roll_end = _roll_end;
  element_class->trim = _trim;
  element_class->set_start = _set_start;
  element_class->set_duration = _set_duration;
  element_class->set_inpoint = _set_inpoint;
  element_class->set_priority = _set_priority;
  element_class->set_max_duration = _set_max_duration;
  element_class->paste = _paste;
  element_class->deep_copy = _deep_copy;
  element_class->lookup_child = _lookup_child;

  container_class->add_child = _add_child;
  container_class->remove_child = _remove_child;
  container_class->child_removed = _child_removed;
  container_class->child_added = _child_added;
  container_class->ungroup = _ungroup;
  container_class->group = _group;
  container_class->grouping_priority = G_MAXUINT;
  container_class->edit = _edit;
}

static void
ges_clip_init (GESClip * self)
{
  self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
      GES_TYPE_CLIP, GESClipPrivate);
  /* FIXME, check why it was done this way _DURATION (self) = GST_SECOND; */
  self->priv->layer = NULL;
  self->priv->nb_effects = 0;
  self->priv->flags = 0;
}

/**
 * ges_clip_create_track_element:
 * @clip: The origin #GESClip
 * @type: The #GESTrackType to create a #GESTrackElement for.
 *
 * Creates a #GESTrackElement for the provided @type. The clip
 * keep a reference to the newly created trackelement, you therefore need to
 * call @ges_container_remove when you are done with it.
 *
 * Returns: (transfer none) (nullable): A #GESTrackElement. Returns NULL if
 * the #GESTrackElement could not be created.
 */
GESTrackElement *
ges_clip_create_track_element (GESClip * clip, GESTrackType type)
{
  GESClipClass *class;
  GESTrackElement *res;

  g_return_val_if_fail (GES_IS_CLIP (clip), NULL);

  GST_DEBUG_OBJECT (clip, "Creating track element for %s",
      ges_track_type_name (type));
  if (!(type & clip->priv->supportedformats)) {
    GST_DEBUG_OBJECT (clip, "We don't support this track type %i", type);
    return NULL;
  }

  class = GES_CLIP_GET_CLASS (clip);

  if (G_UNLIKELY (class->create_track_element == NULL)) {
    GST_ERROR ("No 'create_track_element' implementation available fo type %s",
        G_OBJECT_TYPE_NAME (clip));
    return NULL;
  }

  res = class->create_track_element (clip, type);
  return res;

}

/**
 * ges_clip_create_track_elements:
 * @clip: The origin #GESClip
 * @type: The #GESTrackType to create each #GESTrackElement for.
 *
 * Creates all #GESTrackElements supported by this clip for the track type.
 *
 * Returns: (element-type GESTrackElement) (transfer full): A #GList of
 * newly created #GESTrackElement-s
 */

GList *
ges_clip_create_track_elements (GESClip * clip, GESTrackType type)
{
  GList *result = NULL, *tmp, *children;
  GESClipClass *klass;
  guint max_prio, min_prio;

  g_return_val_if_fail (GES_IS_CLIP (clip), NULL);

  klass = GES_CLIP_GET_CLASS (clip);

  if (!(klass->create_track_elements)) {
    GST_WARNING ("no GESClip::create_track_elements implentation");
    return NULL;
  }

  GST_DEBUG_OBJECT (clip, "Creating TrackElements for type: %s",
      ges_track_type_name (type));
  children = ges_container_get_children (GES_CONTAINER (clip), TRUE);
  for (tmp = children; tmp; tmp = tmp->next) {
    GESTrackElement *child = GES_TRACK_ELEMENT (tmp->data);

    if (!GES_IS_BASE_EFFECT (child) && !ges_track_element_get_track (child) &&
        ges_track_element_get_track_type (child) & type) {

      GST_DEBUG_OBJECT (clip, "Removing for reusage: %" GST_PTR_FORMAT, child);
      result = g_list_prepend (result, g_object_ref (child));
      ges_container_remove (GES_CONTAINER (clip), tmp->data);
    }
  }
  g_list_free_full (children, gst_object_unref);

  if (!result) {
    result = klass->create_track_elements (clip, type);
  }

  _get_priority_range (GES_CONTAINER (clip), &min_prio, &max_prio);
  for (tmp = result; tmp; tmp = tmp->next) {
    GESTimelineElement *elem = tmp->data;

    _set_start0 (elem, GES_TIMELINE_ELEMENT_START (clip));
    _set_inpoint0 (elem, GES_TIMELINE_ELEMENT_INPOINT (clip));
    _set_duration0 (elem, GES_TIMELINE_ELEMENT_DURATION (clip));

    if (GST_CLOCK_TIME_IS_VALID (GES_TIMELINE_ELEMENT_MAX_DURATION (clip)))
      ges_timeline_element_set_max_duration (GES_TIMELINE_ELEMENT (elem),
          GES_TIMELINE_ELEMENT_MAX_DURATION (clip));

    _set_priority0 (elem, min_prio + clip->priv->nb_effects);

    ges_container_add (GES_CONTAINER (clip), elem);
  }

  return result;
}

/*
 * default implementation of GESClipClass::create_track_elements
 */
GList *
ges_clip_create_track_elements_func (GESClip * clip, GESTrackType type)
{
  GESTrackElement *result;

  GST_DEBUG_OBJECT (clip, "Creating trackelement for track: %s",
      ges_track_type_name (type));
  result = ges_clip_create_track_element (clip, type);
  if (!result) {
    GST_DEBUG ("Did not create track element");
    return NULL;
  }

  return g_list_append (NULL, result);
}

void
ges_clip_set_layer (GESClip * clip, GESLayer * layer)
{
  if (layer == clip->priv->layer)
    return;

  clip->priv->layer = layer;

  GST_DEBUG ("clip:%p, layer:%p", clip, layer);

  /* We do not want to notify the setting of layer = NULL when
   * it is actually the result of a move between layer (as we know
   * that it will be added to another layer right after, and this
   * is what imports here.) */
  if (!FLAG_IS_SET (clip, GES_CLIP_IS_MOVING))
    g_object_notify_by_pspec (G_OBJECT (clip), properties[PROP_LAYER]);
}

guint32
ges_clip_get_layer_priority (GESClip * clip)
{
  if (clip->priv->layer == NULL)
    return -1;

  return ges_layer_get_priority (clip->priv->layer);
}

/**
 * ges_clip_set_moving_from_layer:
 * @clip: a #GESClip
 * @is_moving: %TRUE if you want to start moving @clip to another layer
 * %FALSE when you finished moving it.
 *
 * Sets the clip in a moving to layer state. You might rather use the
 * ges_clip_move_to_layer function to move #GESClip-s
 * from a layer to another.
 **/
void
ges_clip_set_moving_from_layer (GESClip * clip, gboolean is_moving)
{
  g_return_if_fail (GES_IS_CLIP (clip));

  if (is_moving)
    SET_FLAG (clip, GES_CLIP_IS_MOVING);
  else
    UNSET_FLAG (clip, GES_CLIP_IS_MOVING);
}

/**
 * ges_clip_is_moving_from_layer:
 * @clip: a #GESClip
 *
 * Tells you if the clip is currently moving from a layer to another.
 * You might rather use the ges_clip_move_to_layer function to
 * move #GESClip-s from a layer to another.
 *
 * Returns: %TRUE if @clip is currently moving from its current layer
 * %FALSE otherwize
 **/
gboolean
ges_clip_is_moving_from_layer (GESClip * clip)
{
  g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);

  return FLAG_IS_SET (clip, GES_CLIP_IS_MOVING);
}

/**
 * ges_clip_move_to_layer:
 * @clip: a #GESClip
 * @layer: the new #GESLayer
 *
 * Moves @clip to @layer. If @clip is not in any layer, it adds it to
 * @layer, else, it removes it from its current layer, and adds it to @layer.
 *
 * Returns: %TRUE if @clip could be moved %FALSE otherwize
 */
gboolean
ges_clip_move_to_layer (GESClip * clip, GESLayer * layer)
{
  gboolean ret;
  GESLayer *current_layer;

  g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);
  g_return_val_if_fail (GES_IS_LAYER (layer), FALSE);

  current_layer = clip->priv->layer;

  if (current_layer == NULL) {
    GST_DEBUG ("Not moving %p, only adding it to %p", clip, layer);

    return ges_layer_add_clip (layer, clip);
  }

  GST_DEBUG_OBJECT (clip, "moving to layer %p, priority: %d", layer,
      ges_layer_get_priority (layer));

  SET_FLAG (clip, GES_CLIP_IS_MOVING);
  gst_object_ref (clip);
  ret = ges_layer_remove_clip (current_layer, clip);

  if (!ret) {
    gst_object_unref (clip);
    return FALSE;
  }

  ret = ges_layer_add_clip (layer, clip);
  UNSET_FLAG (clip, GES_CLIP_IS_MOVING);

  gst_object_unref (clip);
  g_object_notify_by_pspec (G_OBJECT (clip), properties[PROP_LAYER]);


  return ret && (clip->priv->layer == layer);
}

/**
 * ges_clip_find_track_element:
 * @clip: a #GESClip
 * @track: (allow-none): a #GESTrack or NULL
 * @type: a #GType indicating the type of track element you are looking
 * for or %G_TYPE_NONE if you do not care about the track type.
 *
 * Finds the #GESTrackElement controlled by @clip that is used in @track. You
 * may optionally specify a GType to further narrow search criteria.
 *
 * Note: If many objects match, then the one with the highest priority will be
 * returned.
 *
 * Returns: (transfer full) (nullable): The #GESTrackElement used by @track,
 * else %NULL. Unref after usage
 */

GESTrackElement *
ges_clip_find_track_element (GESClip * clip, GESTrack * track, GType type)
{
  GList *tmp;
  GESTrackElement *otmp;

  GESTrackElement *ret = NULL;

  g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
  g_return_val_if_fail (!(track == NULL && type == G_TYPE_NONE), NULL);

  for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = g_list_next (tmp)) {
    otmp = (GESTrackElement *) tmp->data;

    if ((type != G_TYPE_NONE) && !G_TYPE_CHECK_INSTANCE_TYPE (tmp->data, type))
      continue;

    if ((track == NULL) || (ges_track_element_get_track (otmp) == track)) {
      ret = GES_TRACK_ELEMENT (tmp->data);
      gst_object_ref (ret);
      break;
    }
  }

  return ret;
}

/**
 * ges_clip_get_layer:
 * @clip: a #GESClip
 *
 * Get the #GESLayer to which this clip belongs.
 *
 * Returns: (transfer full) (nullable): The #GESLayer where this @clip is being
 * used, or %NULL if it is not used on any layer. The caller should unref it
 * usage.
 */
GESLayer *
ges_clip_get_layer (GESClip * clip)
{
  g_return_val_if_fail (GES_IS_CLIP (clip), NULL);

  if (clip->priv->layer != NULL)
    gst_object_ref (G_OBJECT (clip->priv->layer));

  return clip->priv->layer;
}

/**
 * ges_clip_get_top_effects:
 * @clip: The origin #GESClip
 *
 * Get effects applied on @clip
 *
 * Returns: (transfer full) (element-type GESTrackElement): a #GList of the
 * #GESBaseEffect that are applied on @clip order by ascendant priorities.
 * The refcount of the objects will be increased. The user will have to
 * unref each #GESBaseEffect and free the #GList.
 */
GList *
ges_clip_get_top_effects (GESClip * clip)
{
  GList *tmp, *ret;
  guint i;

  g_return_val_if_fail (GES_IS_CLIP (clip), NULL);

  GST_DEBUG_OBJECT (clip, "Getting the %i top effects", clip->priv->nb_effects);
  ret = NULL;

  for (tmp = GES_CONTAINER_CHILDREN (clip), i = 0;
      i < clip->priv->nb_effects; tmp = tmp->next, i++) {
    ret = g_list_append (ret, gst_object_ref (tmp->data));
  }

  return g_list_sort (ret, (GCompareFunc) element_start_compare);
}

/**
 * ges_clip_get_top_effect_index:
 * @clip: The origin #GESClip
 * @effect: The #GESBaseEffect we want to get the top index from
 *
 * Gets the index position of an effect.
 *
 * Returns: The top index of the effect, -1 if something went wrong.
 */
gint
ges_clip_get_top_effect_index (GESClip * clip, GESBaseEffect * effect)
{
  guint max_prio, min_prio;

  g_return_val_if_fail (GES_IS_CLIP (clip), -1);
  g_return_val_if_fail (GES_IS_BASE_EFFECT (effect), -1);

  _get_priority_range (GES_CONTAINER (clip), &min_prio, &max_prio);

  return GES_TIMELINE_ELEMENT_PRIORITY (effect) - min_prio;
}

/* TODO 2.0 remove as it is Deprecated */
gint
ges_clip_get_top_effect_position (GESClip * clip, GESBaseEffect * effect)
{
  return ges_clip_get_top_effect_index (clip, effect);
}

/* TODO 2.0 remove as it is Deprecated */
gboolean
ges_clip_set_top_effect_priority (GESClip * clip,
    GESBaseEffect * effect, guint newpriority)
{
  return ges_clip_set_top_effect_index (clip, effect, newpriority);
}

/**
 * ges_clip_set_top_effect_index:
 * @clip: The origin #GESClip
 * @effect: The #GESBaseEffect to move
 * @newindex: the new index at which to move the @effect inside this
 * #GESClip
 *
 * This is a convenience method that lets you set the index of a top effect.
 *
 * Returns: %TRUE if @effect was successfuly moved, %FALSE otherwise.
 */
gboolean
ges_clip_set_top_effect_index (GESClip * clip, GESBaseEffect * effect,
    guint newindex)
{
  gint inc;
  GList *tmp;
  guint current_prio, min_prio, max_prio;
  GESTrackElement *track_element;

  g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);

  track_element = GES_TRACK_ELEMENT (effect);
  current_prio = _PRIORITY (track_element);

  _get_priority_range (GES_CONTAINER (clip), &min_prio, &max_prio);

  newindex = newindex + min_prio;
  /*  We don't change the priority */
  if (current_prio == newindex ||
      (G_UNLIKELY (GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (track_element)) !=
              clip)))
    return FALSE;

  if (newindex > (clip->priv->nb_effects - 1 + min_prio)) {
    GST_DEBUG ("You are trying to make %p not a top effect", effect);
    return FALSE;
  }

  if (current_prio > clip->priv->nb_effects + min_prio) {
    GST_ERROR ("%p is not a top effect", effect);
    return FALSE;
  }

  _ges_container_sort_children (GES_CONTAINER (clip));
  if (_PRIORITY (track_element) < newindex)
    inc = -1;
  else
    inc = +1;

  GST_DEBUG_OBJECT (clip, "Setting top effect %" GST_PTR_FORMAT "priority: %i",
      effect, newindex);

  for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
    GESTrackElement *tmpo = GES_TRACK_ELEMENT (tmp->data);
    guint tck_priority = _PRIORITY (tmpo);

    if (tmpo == track_element)
      continue;

    if ((inc == +1 && tck_priority >= newindex) ||
        (inc == -1 && tck_priority <= newindex)) {
      _set_priority0 (GES_TIMELINE_ELEMENT (tmpo), tck_priority + inc);
    }
  }
  _set_priority0 (GES_TIMELINE_ELEMENT (track_element), newindex);

  return TRUE;
}

/**
 * ges_clip_split:
 * @clip: the #GESClip to split
 * @position: a #GstClockTime representing the timeline position at which to split
 *
 * The function modifies @clip, and creates another #GESClip so we have two
 * clips at the end, splitted at the time specified by @position, as a position
 * in the timeline (not in the clip to be split). For example, if
 * ges_clip_split is called on a 4-second clip playing from 0:01.00 until
 * 0:05.00, with a split position of 0:02.00, this will result in one clip of 1
 * second and one clip of 3 seconds, not in two clips of 2 seconds.
 *
 * The newly created clip will be added to the same layer as @clip is in. This
 * implies that @clip must be in a #GESLayer for the operation to be possible.
 *
 * This method supports clips playing at a different tempo than one second per
 * second. For example, splitting a clip with a #GESEffect 'pitch tempo=1.5'
 * four seconds after it starts, will set the inpoint of the new clip to six
 * seconds after that of the clip to split. For this, the rate-changing
 * property must be registered using @ges_effect_class_register_rate_property;
 * for the 'pitch' plugin, this is already done.
 *
 * Returns: (transfer none) (nullable): The newly created #GESClip resulting
 * from the splitting or %NULL if the clip can't be split.
 */
GESClip *
ges_clip_split (GESClip * clip, guint64 position)
{
  GList *tmp;
  GESClip *new_object;
  GstClockTime start, inpoint, duration, old_duration, new_duration;
  gdouble media_duration_factor;

  g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
  g_return_val_if_fail (clip->priv->layer, NULL);
  g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (position), NULL);

  duration = _DURATION (clip);
  start = _START (clip);
  inpoint = _INPOINT (clip);

  if (position >= start + duration || position <= start) {
    GST_WARNING_OBJECT (clip, "Can not split %" GST_TIME_FORMAT
        " out of boundaries", GST_TIME_ARGS (position));
    return NULL;
  }

  GST_DEBUG_OBJECT (clip, "Spliting at %" GST_TIME_FORMAT,
      GST_TIME_ARGS (position));

  /* Create the new Clip */
  new_object = GES_CLIP (ges_timeline_element_copy (GES_TIMELINE_ELEMENT (clip),
          FALSE));

  GST_DEBUG_OBJECT (new_object, "New 'splitted' clip");
  /* Set new timing properties on the Clip */
  media_duration_factor =
      ges_timeline_element_get_media_duration_factor (GES_TIMELINE_ELEMENT
      (clip));
  new_duration = duration + start - position;
  old_duration = position - start;
  _set_start0 (GES_TIMELINE_ELEMENT (new_object), position);
  _set_inpoint0 (GES_TIMELINE_ELEMENT (new_object),
      inpoint + old_duration * media_duration_factor);
  _set_duration0 (GES_TIMELINE_ELEMENT (new_object), new_duration);

  /* We do not want the timeline to create again TrackElement-s */
  ges_clip_set_moving_from_layer (new_object, TRUE);
  ges_layer_add_clip (clip->priv->layer, new_object);
  ges_clip_set_moving_from_layer (new_object, FALSE);

  for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
    GESTrackElement *new_trackelement, *trackelement =
        GES_TRACK_ELEMENT (tmp->data);

    new_trackelement =
        GES_TRACK_ELEMENT (ges_timeline_element_copy (GES_TIMELINE_ELEMENT
            (trackelement), FALSE));
    if (new_trackelement == NULL) {
      GST_WARNING_OBJECT (trackelement, "Could not create a copy");
      continue;
    }

    /* Set 'new' track element timing propeties */
    _set_start0 (GES_TIMELINE_ELEMENT (new_trackelement), position);
    _set_inpoint0 (GES_TIMELINE_ELEMENT (new_trackelement),
        inpoint + old_duration * media_duration_factor);
    _set_duration0 (GES_TIMELINE_ELEMENT (new_trackelement), new_duration);

    ges_container_add (GES_CONTAINER (new_object),
        GES_TIMELINE_ELEMENT (new_trackelement));
    ges_track_element_copy_properties (GES_TIMELINE_ELEMENT (trackelement),
        GES_TIMELINE_ELEMENT (new_trackelement));

    ges_track_element_copy_bindings (trackelement, new_trackelement,
        position - start + inpoint);
  }

  SET_FLAG (clip, GES_CLIP_IS_SPLITTING);
  _set_duration0 (GES_TIMELINE_ELEMENT (clip), old_duration);
  UNSET_FLAG (clip, GES_CLIP_IS_SPLITTING);

  if (GES_TIMELINE_ELEMENT_TIMELINE (clip)) {
    for (tmp = GES_CONTAINER_CHILDREN (new_object); tmp; tmp = tmp->next) {
      timeline_create_transitions (GES_TIMELINE_ELEMENT_TIMELINE (tmp->data),
          tmp->data);
    }
  }

  return new_object;
}

/**
 * ges_clip_set_supported_formats:
 * @clip: the #GESClip to set supported formats on
 * @supportedformats: the #GESTrackType defining formats supported by @clip
 *
 * Sets the formats supported by the file.
 */
void
ges_clip_set_supported_formats (GESClip * clip, GESTrackType supportedformats)
{
  g_return_if_fail (GES_IS_CLIP (clip));

  clip->priv->supportedformats = supportedformats;
}

/**
 * ges_clip_get_supported_formats:
 * @clip: the #GESClip
 *
 * Get the formats supported by @clip.
 *
 * Returns: The formats supported by @clip.
 */
GESTrackType
ges_clip_get_supported_formats (GESClip * clip)
{
  g_return_val_if_fail (GES_IS_CLIP (clip), GES_TRACK_TYPE_UNKNOWN);

  return clip->priv->supportedformats;
}

gboolean
_ripple (GESTimelineElement * element, GstClockTime start)
{
  gboolean ret = TRUE;
  GESTimeline *timeline;
  GESClip *clip = GES_CLIP (element);

  timeline = ges_layer_get_timeline (clip->priv->layer);

  if (timeline == NULL) {
    GST_DEBUG ("Not in a timeline yet");
    return FALSE;
  }

  if (start > _END (element))
    start = _END (element);

  if (GES_CONTAINER_CHILDREN (element)) {
    GESTrackElement *track_element =
        GES_TRACK_ELEMENT (GES_CONTAINER_CHILDREN (element)->data);

    ret = timeline_ripple_object (timeline, track_element, NULL, GES_EDGE_NONE,
        start);
  }

  return ret;
}

static gboolean
_ripple_end (GESTimelineElement * element, GstClockTime end)
{
  gboolean ret = TRUE;
  GESTimeline *timeline;
  GESClip *clip = GES_CLIP (element);

  timeline = ges_layer_get_timeline (clip->priv->layer);

  if (timeline == NULL) {
    GST_DEBUG ("Not in a timeline yet");
    return FALSE;
  }

  if (GES_CONTAINER_CHILDREN (element)) {
    GESTrackElement *track_element =
        GES_TRACK_ELEMENT (GES_CONTAINER_CHILDREN (element)->data);

    ret = timeline_ripple_object (timeline, track_element, NULL, GES_EDGE_END,
        end);
  }

  return ret;
}

gboolean
_roll_start (GESTimelineElement * element, GstClockTime start)
{
  gboolean ret = TRUE;
  GESTimeline *timeline;

  GESClip *clip = GES_CLIP (element);

  timeline = ges_layer_get_timeline (clip->priv->layer);

  if (timeline == NULL) {
    GST_DEBUG ("Not in a timeline yet");
    return FALSE;
  }

  if (GES_CONTAINER_CHILDREN (element)) {
    GESTrackElement *track_element =
        GES_TRACK_ELEMENT (GES_CONTAINER_CHILDREN (element)->data);

    ret = timeline_roll_object (timeline, track_element, NULL, GES_EDGE_START,
        start);
  }

  return ret;
}

gboolean
_roll_end (GESTimelineElement * element, GstClockTime end)
{
  gboolean ret = TRUE;
  GESTimeline *timeline;

  GESClip *clip = GES_CLIP (element);

  timeline = ges_layer_get_timeline (clip->priv->layer);
  if (timeline == NULL) {
    GST_DEBUG ("Not in a timeline yet");
    return FALSE;
  }


  if (GES_CONTAINER_CHILDREN (element)) {
    GESTrackElement *track_element =
        GES_TRACK_ELEMENT (GES_CONTAINER_CHILDREN (element)->data);

    ret = timeline_roll_object (timeline, track_element,
        NULL, GES_EDGE_END, end);
  }

  return ret;
}

gboolean
_trim (GESTimelineElement * element, GstClockTime start)
{
  gboolean ret = TRUE;
  GESTimeline *timeline;

  GESClip *clip = GES_CLIP (element);

  timeline = ges_layer_get_timeline (clip->priv->layer);

  if (timeline == NULL) {
    GST_DEBUG ("Not in a timeline yet");
    return FALSE;
  }

  if (GES_CONTAINER_CHILDREN (element)) {
    GESTrackElement *track_element =
        GES_TRACK_ELEMENT (GES_CONTAINER_CHILDREN (element)->data);

    GST_DEBUG_OBJECT (element, "Trimming child: %" GST_PTR_FORMAT,
        track_element);
    ret = timeline_trim_object (timeline, track_element, NULL, GES_EDGE_START,
        start);
  }

  return ret;
}

/**
 * ges_clip_add_asset:
 * @clip: a #GESClip
 * @asset: a #GESAsset with #GES_TYPE_TRACK_ELEMENT as extractable_type
 *
 * Extracts a #GESTrackElement from @asset and adds it to the @clip.
 * Should only be called in order to add operations to a #GESClip,
 * ni other cases TrackElement are added automatically when adding the
 * #GESClip/#GESAsset to a layer.
 *
 * Takes a reference on @track_element.
 *
 * Returns: (transfer none)(allow-none): Created #GESTrackElement or NULL
 * if an error happened
 */
GESTrackElement *
ges_clip_add_asset (GESClip * clip, GESAsset * asset)
{
  GESTrackElement *element;

  g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
  g_return_val_if_fail (GES_IS_ASSET (asset), NULL);
  g_return_val_if_fail (g_type_is_a (ges_asset_get_extractable_type
          (asset), GES_TYPE_TRACK_ELEMENT), NULL);

  element = GES_TRACK_ELEMENT (ges_asset_extract (asset, NULL));

  if (!ges_container_add (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (element)))
    return NULL;

  return element;

}

/**
 * ges_clip_find_track_elements:
 * @clip: a #GESClip
 * @track: (allow-none): a #GESTrack or NULL
 * @track_type: a #GESTrackType indicating the type of tracks in which elements
 * should be searched.
 * @type: a #GType indicating the type of track element you are looking
 * for or %G_TYPE_NONE if you do not care about the track type.
 *
 * Finds all the #GESTrackElement controlled by @clip that is used in @track. You
 * may optionally specify a GType to further narrow search criteria.
 *
 * Returns: (transfer full) (element-type GESTrackElement): a #GList of the
 * #GESTrackElement contained in @clip.
 * The refcount of the objects will be increased. The user will have to
 * unref each #GESTrackElement and free the #GList.
 */

GList *
ges_clip_find_track_elements (GESClip * clip, GESTrack * track,
    GESTrackType track_type, GType type)
{
  GList *tmp;
  GESTrack *tmptrack;
  GESTrackElement *otmp;
  GESTrackElement *foundElement;

  GList *ret = NULL;

  g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
  g_return_val_if_fail (!(track == NULL && type == G_TYPE_NONE &&
          track_type == GES_TRACK_TYPE_UNKNOWN), NULL);

  for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = g_list_next (tmp)) {
    otmp = (GESTrackElement *) tmp->data;

    if ((type != G_TYPE_NONE) && !G_TYPE_CHECK_INSTANCE_TYPE (tmp->data, type))
      continue;

    tmptrack = ges_track_element_get_track (otmp);
    if (((track != NULL && tmptrack == track)) ||
        (track_type != GES_TRACK_TYPE_UNKNOWN
            && ges_track_element_get_track_type (otmp) == track_type)) {

      foundElement = GES_TRACK_ELEMENT (tmp->data);

      ret = g_list_append (ret, gst_object_ref (foundElement));
    }
  }

  return ret;
}