/* GStreamer Editing Services * Copyright (C) 2009 Edward Hervey * 2009 Nokia Corporation * * 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:ges-timeline * @short_description: Multimedia timeline * * #GESTimeline is the central object for any multimedia timeline. * * Contains a list of #GESTimelineLayer which users should use to arrange the * various timeline objects through time. * * The output type is determined by the #GESTrack that are set on * the #GESTimeline. * * To save/load a timeline, you can use the ges_timeline_load_from_uri() and * ges_timeline_save_to_uri() methods to use the default format. If you wish * to specify the format to save/load the timeline from, please consult the * documentation about #GESFormatter. */ #include "ges-internal.h" #include "ges-timeline.h" #include "ges-track.h" #include "ges-timeline-layer.h" #include "ges.h" typedef struct _MoveContext MoveContext; static inline void init_movecontext (MoveContext * mv_ctx); G_DEFINE_TYPE (GESTimeline, ges_timeline, GST_TYPE_BIN); GST_DEBUG_CATEGORY_STATIC (ges_timeline_debug); #undef GST_CAT_DEFAULT #define GST_CAT_DEFAULT ges_timeline_debug #define GES_TIMELINE_PENDINGOBJS_GET_LOCK(timeline) \ (&GES_TIMELINE(timeline)->priv->pendingobjects_lock) #define GES_TIMELINE_PENDINGOBJS_LOCK(timeline) \ (g_mutex_lock(GES_TIMELINE_PENDINGOBJS_GET_LOCK (timeline))) #define GES_TIMELINE_PENDINGOBJS_UNLOCK(timeline) \ (g_mutex_unlock(GES_TIMELINE_PENDINGOBJS_GET_LOCK (timeline))) typedef struct TrackObjIters { GSequenceIter *iter_start; GSequenceIter *iter_end; GSequenceIter *iter_obj; } TrackObjIters; static void _destroy_obj_iters (TrackObjIters * iters) { g_slice_free (TrackObjIters, iters); } /* The move context is used for the timeline editing modes functions in order to * + Ripple / Roll / Slide / Move / Trim * * The context aims at avoiding to recalculate values/objects on each call of the * editing functions. */ struct _MoveContext { GESTimelineObject *obj; GESEdge edge; GESEditMode mode; /* Ripple and Roll Objects */ GList *moving_tckobjs; /* We use it as a set of TimelineObject to move between layers */ GHashTable *moving_tlobjs; /* Min priority of the objects currently in moving_tlobjs */ guint min_move_layer; /* Max priority of the objects currently in moving_tlobjs */ guint max_layer_prio; /* Never trim so duration would becomes < 0 */ guint64 max_trim_pos; /* fields to force/avoid new context */ /* Set to %TRUE when the track is doing updates of track objects * properties so we don't end up always needing new move context */ gboolean ignore_needs_ctx; gboolean needs_move_ctx; /* Last snapping properties */ GESTrackObject *last_snaped1; GESTrackObject *last_snaped2; GstClockTime *last_snap_ts; }; struct _GESTimelinePrivate { GList *layers; /* A list of GESTimelineLayer sorted by priority */ GList *tracks; /* A list of private track data */ /* The duration of the timeline */ gint64 duration; /* Timeline edition modes and snapping management */ guint64 snapping_distance; /* FIXME: Should we offer an API over those fields ? * FIXME: Should other classes than subclasses of TrackSource also * be tracked? */ /* Snapping fields */ GHashTable *by_start; /* {TrackSource: start} */ GHashTable *by_end; /* {TrackSource: end} */ GHashTable *by_object; /* {timecode: TrackSource} */ GHashTable *obj_iters; /* {TrackSource: TrackObjIters} */ GSequence *starts_ends; /* Sorted list of starts/ends */ /* We keep 1 reference to our trackobject here */ GSequence *tracksources; /* TrackSource-s sorted by start/priorities */ MoveContext movecontext; }; /* private structure to contain our track-related information */ typedef struct { GESTimeline *timeline; GESTrack *track; GstPad *pad; /* Pad from the track */ GstPad *ghostpad; } TrackPrivate; enum { PROP_0, PROP_DURATION, PROP_SNAPPING_DISTANCE, PROP_UPDATE, PROP_LAST }; static GParamSpec *properties[PROP_LAST]; enum { TRACK_ADDED, TRACK_REMOVED, LAYER_ADDED, LAYER_REMOVED, DISCOVERY_ERROR, SNAPING_STARTED, SNAPING_ENDED, LAST_SIGNAL }; static GstBinClass *parent_class; static guint ges_timeline_signals[LAST_SIGNAL] = { 0 }; static gint custom_find_track (TrackPrivate * tr_priv, GESTrack * track); /* Internal methods */ static gboolean ges_timeline_enable_update_internal (GESTimeline * timeline, gboolean enabled) { GList *tmp; gboolean res = TRUE; GST_DEBUG_OBJECT (timeline, "%s updates", enabled ? "Enabling" : "Disabling"); for (tmp = timeline->priv->tracks; tmp; tmp = tmp->next) { if (!ges_track_enable_update (((TrackPrivate *) tmp->data)->track, enabled)) res = FALSE; } /* Make sure we reset the context */ timeline->priv->movecontext.needs_move_ctx = TRUE; return res; } /* GObject Standard vmethods*/ static void ges_timeline_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec) { GESTimeline *timeline = GES_TIMELINE (object); switch (property_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); case PROP_DURATION: g_value_set_uint64 (value, timeline->priv->duration); break; case PROP_SNAPPING_DISTANCE: g_value_set_uint64 (value, timeline->priv->snapping_distance); break; case PROP_UPDATE: g_value_set_boolean (value, ges_timeline_is_updating (timeline)); break; } } static void ges_timeline_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { GESTimeline *timeline = GES_TIMELINE (object); switch (property_id) { case PROP_SNAPPING_DISTANCE: timeline->priv->snapping_distance = g_value_get_uint64 (value); break; case PROP_UPDATE: ges_timeline_enable_update_internal (timeline, g_value_get_boolean (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void ges_timeline_dispose (GObject * object) { GESTimelinePrivate *priv = GES_TIMELINE (object)->priv; while (priv->layers) { GESTimelineLayer *layer = (GESTimelineLayer *) priv->layers->data; ges_timeline_remove_layer (GES_TIMELINE (object), layer); } /* FIXME: it should be possible to remove tracks before removing * layers, but at the moment this creates a problem because the track * objects aren't notified that their gnlobjects have been destroyed. */ while (priv->tracks) { TrackPrivate *tr_priv = (TrackPrivate *) priv->tracks->data; ges_timeline_remove_track (GES_TIMELINE (object), tr_priv->track); } g_hash_table_unref (priv->by_start); g_hash_table_unref (priv->by_end); g_hash_table_unref (priv->by_object); g_hash_table_unref (priv->obj_iters); g_sequence_free (priv->starts_ends); g_sequence_free (priv->tracksources); g_list_free (priv->movecontext.moving_tckobjs); g_hash_table_unref (priv->movecontext.moving_tlobjs); G_OBJECT_CLASS (ges_timeline_parent_class)->dispose (object); } static void ges_timeline_finalize (GObject * object) { G_OBJECT_CLASS (ges_timeline_parent_class)->finalize (object); } static void ges_timeline_class_init (GESTimelineClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); g_type_class_add_private (klass, sizeof (GESTimelinePrivate)); parent_class = g_type_class_peek_parent (klass); object_class->get_property = ges_timeline_get_property; object_class->set_property = ges_timeline_set_property; object_class->dispose = ges_timeline_dispose; object_class->finalize = ges_timeline_finalize; /** * GESTimeline:duration: * * Current duration (in nanoseconds) of the #GESTimeline */ properties[PROP_DURATION] = g_param_spec_uint64 ("duration", "Duration", "The duration of the timeline", 0, G_MAXUINT64, GST_CLOCK_TIME_NONE, G_PARAM_READABLE); g_object_class_install_property (object_class, PROP_DURATION, properties[PROP_DURATION]); /** * GESTimeline:snapping-distance: * * Distance (in nanoseconds) from which a moving object will snap * with it neighboors. 0 means no snapping. */ properties[PROP_SNAPPING_DISTANCE] = g_param_spec_uint64 ("snapping-distance", "Snapping distance", "Distance from which moving an object will snap with neighboors", 0, G_MAXUINT64, 0, G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_SNAPPING_DISTANCE, properties[PROP_SNAPPING_DISTANCE]); /** * GESTimeline:update: * * If %TRUE, then all modifications to objects within the timeline will * cause a internal pipeline update (if required). * If %FALSE, then only the timeline start/duration/stop properties * will be updated, and the internal pipeline will only be updated when the * property is set back to %TRUE. * * It is recommended to temporarily set this property to %FALSE before doing * more than one modification in the timeline (like adding or moving * several objects at once) in order to speed up the process, and then setting * back the property to %TRUE when done. */ properties[PROP_UPDATE] = g_param_spec_boolean ("update", "Update", "Update the internal pipeline on every modification", TRUE, G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_UPDATE, properties[PROP_UPDATE]); /** * GESTimeline::track-added: * @timeline: the #GESTimeline * @track: the #GESTrack that was added to the timeline * * Will be emitted after the track was added to the timeline. */ ges_timeline_signals[TRACK_ADDED] = g_signal_new ("track-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, track_added), NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_TRACK); /** * GESTimeline::track-removed: * @timeline: the #GESTimeline * @track: the #GESTrack that was removed from the timeline * * Will be emitted after the track was removed from the timeline. */ ges_timeline_signals[TRACK_REMOVED] = g_signal_new ("track-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, track_removed), NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_TRACK); /** * GESTimeline::layer-added: * @timeline: the #GESTimeline * @layer: the #GESTimelineLayer that was added to the timeline * * Will be emitted after the layer was added to the timeline. */ ges_timeline_signals[LAYER_ADDED] = g_signal_new ("layer-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, layer_added), NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_TIMELINE_LAYER); /** * GESTimeline::layer-removed: * @timeline: the #GESTimeline * @layer: the #GESTimelineLayer that was removed from the timeline * * Will be emitted after the layer was removed from the timeline. */ ges_timeline_signals[LAYER_REMOVED] = g_signal_new ("layer-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, layer_removed), NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_TIMELINE_LAYER); /** * GESTimeline::discovery-error: * @timeline: the #GESTimeline * @formatter: the #GESFormatter * @source: The #GESTimelineFileSource that could not be discovered properly * @error: (type GLib.Error): #GError, which will be non-NULL if an error * occurred during discovery */ ges_timeline_signals[DISCOVERY_ERROR] = g_signal_new ("discovery-error", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, 0, NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 2, GES_TYPE_TIMELINE_FILE_SOURCE, G_TYPE_ERROR); /** * GESTimeline::track-objects-snapping: * @timeline: the #GESTimeline * @obj1: the first #GESTrackObject that was snapping. * @obj2: the second #GESTrackObject that was snapping. * @position: the position where the two objects finally snapping. * * Will be emitted when the 2 #GESTrackObject first snapped * * Since: 0.10.XX */ ges_timeline_signals[SNAPING_STARTED] = g_signal_new ("snapping-started", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 3, GES_TYPE_TRACK_OBJECT, GES_TYPE_TRACK_OBJECT, G_TYPE_UINT64); /** * GESTimeline::snapping-end: * @timeline: the #GESTimeline * @obj1: the first #GESTrackObject that was snapping. * @obj2: the second #GESTrackObject that was snapping. * @position: the position where the two objects finally snapping. * * Will be emitted when the 2 #GESTrackObject ended to snap * * Since: 0.10.XX */ ges_timeline_signals[SNAPING_ENDED] = g_signal_new ("snapping-ended", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 3, GES_TYPE_TRACK_OBJECT, GES_TYPE_TRACK_OBJECT, G_TYPE_UINT64); } static void ges_timeline_init (GESTimeline * self) { GESTimelinePrivate *priv; GST_DEBUG_CATEGORY_INIT (ges_timeline_debug, "gestimeline", GST_DEBUG_FG_YELLOW, "ges timeline"); self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GES_TYPE_TIMELINE, GESTimelinePrivate); priv = self->priv; priv->layers = NULL; priv->tracks = NULL; priv->duration = 0; priv->snapping_distance = 0; /* Move context initialization */ init_movecontext (&self->priv->movecontext); priv->movecontext.ignore_needs_ctx = FALSE; priv->by_start = g_hash_table_new (g_direct_hash, g_direct_equal); priv->by_end = g_hash_table_new (g_direct_hash, g_direct_equal); priv->by_object = g_hash_table_new (g_direct_hash, g_direct_equal); priv->obj_iters = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, (GDestroyNotify) _destroy_obj_iters); priv->starts_ends = g_sequence_new (g_free); priv->tracksources = g_sequence_new (g_object_unref); } /* Private methods */ /* Sorting utils*/ static gint sort_layers (gpointer a, gpointer b) { GESTimelineLayer *layer_a, *layer_b; guint prio_a, prio_b; layer_a = GES_TIMELINE_LAYER (a); layer_b = GES_TIMELINE_LAYER (b); prio_a = ges_timeline_layer_get_priority (layer_a); prio_b = ges_timeline_layer_get_priority (layer_b); if ((gint) prio_a > (guint) prio_b) return 1; if ((guint) prio_a < (guint) prio_b) return -1; return 0; } static void timeline_update_duration (GESTimeline * timeline) { GstClockTime *cduration; GSequenceIter *it = g_sequence_get_end_iter (timeline->priv->starts_ends); it = g_sequence_iter_prev (it); if (g_sequence_iter_is_end (it)) return; cduration = g_sequence_get (it); if (cduration && timeline->priv->duration != *cduration) { GST_DEBUG ("track duration : %" GST_TIME_FORMAT " current : %" GST_TIME_FORMAT, GST_TIME_ARGS (*cduration), GST_TIME_ARGS (timeline->priv->duration)); timeline->priv->duration = *cduration; g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_DURATION]); } } static gint objects_start_compare (GESTrackObject * a, GESTrackObject * b) { if (a->start == b->start) { if (a->priority < b->priority) return -1; if (a->priority > b->priority) return 1; return 0; } if (a->start < b->start) return -1; if (a->start > b->start) return 1; return 0; } static inline void sort_track_objects (GESTimeline * timeline) { g_sequence_sort (timeline->priv->tracksources, (GCompareDataFunc) objects_start_compare, NULL); } static gint compare_uint64 (guint64 * a, guint64 * b, gpointer user_data) { if (*a > *b) return 1; else if (*a == *b) return 0; else return -1; } static gint custom_find_track (TrackPrivate * tr_priv, GESTrack * track) { if (tr_priv->track == track) return 0; return -1; } static inline void sort_starts_ends_end (GESTimeline * timeline, GESTrackObject * obj) { GESTimelinePrivate *priv = timeline->priv; guint64 *end = g_hash_table_lookup (priv->by_end, obj); TrackObjIters *iters = g_hash_table_lookup (priv->obj_iters, obj); *end = obj->start + obj->duration; g_sequence_sort_changed (iters->iter_end, (GCompareDataFunc) compare_uint64, NULL); timeline_update_duration (timeline); } static inline void sort_starts_ends_start (GESTimeline * timeline, GESTrackObject * obj) { GESTimelinePrivate *priv = timeline->priv; guint64 *start = g_hash_table_lookup (priv->by_start, obj); TrackObjIters *iters = g_hash_table_lookup (priv->obj_iters, obj); *start = obj->start; g_sequence_sort_changed (iters->iter_start, (GCompareDataFunc) compare_uint64, NULL); timeline_update_duration (timeline); } /* Timeline edition functions */ static inline void init_movecontext (MoveContext * mv_ctx) { mv_ctx->moving_tckobjs = NULL; mv_ctx->moving_tlobjs = g_hash_table_new (g_direct_hash, g_direct_equal); mv_ctx->max_trim_pos = G_MAXUINT64; mv_ctx->min_move_layer = G_MAXUINT; mv_ctx->max_layer_prio = 0; mv_ctx->last_snaped1 = NULL; mv_ctx->last_snaped2 = NULL; mv_ctx->last_snap_ts = NULL; } static inline void clean_movecontext (MoveContext * mv_ctx) { g_list_free (mv_ctx->moving_tckobjs); g_hash_table_unref (mv_ctx->moving_tlobjs); init_movecontext (mv_ctx); } static void stop_tracking_for_snapping (GESTimeline * timeline, GESTrackObject * tckobj) { guint64 *start, *end; GESTimelinePrivate *priv = timeline->priv; TrackObjIters *iters; start = g_hash_table_lookup (priv->by_start, tckobj); end = g_hash_table_lookup (priv->by_end, tckobj); iters = g_hash_table_lookup (priv->obj_iters, tckobj); g_hash_table_remove (priv->by_start, tckobj); g_hash_table_remove (priv->by_end, tckobj); g_hash_table_remove (priv->by_object, end); g_hash_table_remove (priv->by_object, start); g_sequence_remove (iters->iter_start); g_sequence_remove (iters->iter_end); g_sequence_remove (iters->iter_obj); g_hash_table_remove (priv->obj_iters, tckobj); timeline_update_duration (timeline); } static void start_tracking_track_obj (GESTimeline * timeline, GESTrackObject * tckobj) { TrackObjIters *iters; guint64 *pstart, *pend; GESTimelinePrivate *priv = timeline->priv; pstart = g_malloc (sizeof (guint64)); pend = g_malloc (sizeof (guint64)); *pstart = tckobj->start; *pend = *pstart + tckobj->duration; iters = g_slice_new (TrackObjIters); iters->iter_start = g_sequence_insert_sorted (priv->starts_ends, pstart, (GCompareDataFunc) compare_uint64, NULL); iters->iter_end = g_sequence_insert_sorted (priv->starts_ends, pend, (GCompareDataFunc) compare_uint64, NULL); iters->iter_obj = g_sequence_insert_sorted (priv->tracksources, g_object_ref (tckobj), (GCompareDataFunc) objects_start_compare, NULL); g_hash_table_insert (priv->by_start, tckobj, pstart); g_hash_table_insert (priv->by_object, pstart, tckobj); g_hash_table_insert (priv->by_end, tckobj, pend); g_hash_table_insert (priv->by_object, pend, tckobj); g_hash_table_insert (priv->obj_iters, tckobj, iters); timeline->priv->movecontext.needs_move_ctx = TRUE; timeline_update_duration (timeline); } static inline void ges_timeline_emit_snappig (GESTimeline * timeline, GESTrackObject * obj1, guint64 * timecode) { GESTrackObject *obj2; MoveContext *mv_ctx = &timeline->priv->movecontext; GstClockTime snap_time = timecode ? *timecode : 0; GstClockTime last_snap_ts = mv_ctx->last_snap_ts ? *mv_ctx->last_snap_ts : GST_CLOCK_TIME_NONE; GST_DEBUG_OBJECT (timeline, "Distance: %" GST_TIME_FORMAT " snapping at %" GST_TIME_FORMAT, GST_TIME_ARGS (timeline->priv->snapping_distance), GST_TIME_ARGS (snap_time)); if (timecode == NULL) { if (mv_ctx->last_snaped1 != NULL && mv_ctx->last_snaped2 != NULL) { g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0, mv_ctx->last_snaped1, mv_ctx->last_snaped2, last_snap_ts); /* We then need to recalculate the moving context */ timeline->priv->movecontext.needs_move_ctx = TRUE; } return; } obj2 = g_hash_table_lookup (timeline->priv->by_object, timecode); if (last_snap_ts != *timecode) { g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0, mv_ctx->last_snaped1, mv_ctx->last_snaped2, (last_snap_ts)); /* We want the snap start signal to be emited anyway */ mv_ctx->last_snap_ts = NULL; } if (mv_ctx->last_snap_ts == NULL) { mv_ctx->last_snaped1 = obj1; mv_ctx->last_snaped2 = obj2; mv_ctx->last_snap_ts = timecode; g_signal_emit (timeline, ges_timeline_signals[SNAPING_STARTED], 0, obj1, obj2, *timecode); } } static guint64 * ges_timeline_snap_position (GESTimeline * timeline, GESTrackObject * trackobj, guint64 * current, guint64 timecode, gboolean emit) { GESTimelinePrivate *priv = timeline->priv; GSequenceIter *iter, *prev_iter, *nxt_iter; GESTrackObject *tmp_tckobj; GESTimelineObject *tmp_tlobj, *tlobj; GstClockTime *last_snap_ts = priv->movecontext.last_snap_ts; guint64 snap_distance = timeline->priv->snapping_distance; guint64 *prev_tc, *next_tc, *ret = NULL, off = G_MAXUINT64, off1 = G_MAXUINT64; /* Avoid useless calculations */ if (snap_distance == 0) return NULL; /* If we can just resnap as last snap... do it */ if (last_snap_ts) { off = timecode > *last_snap_ts ? timecode - *last_snap_ts : *last_snap_ts - timecode; if (off <= snap_distance) { ret = last_snap_ts; goto done; } } tlobj = ges_track_object_get_timeline_object (trackobj); iter = g_sequence_search (priv->starts_ends, &timecode, (GCompareDataFunc) compare_uint64, NULL); /* Getting the next/previous values, and use the closest one if any "respects" * the snap_distance value */ nxt_iter = iter; while (!g_sequence_iter_is_end (nxt_iter)) { next_tc = g_sequence_get (iter); tmp_tckobj = g_hash_table_lookup (timeline->priv->by_object, next_tc); tmp_tlobj = ges_track_object_get_timeline_object (tmp_tckobj); off = timecode > *next_tc ? timecode - *next_tc : *next_tc - timecode; if (next_tc != current && off <= snap_distance && tlobj != tmp_tlobj) { ret = next_tc; break; } nxt_iter = g_sequence_iter_next (nxt_iter); } if (ret == NULL) off = G_MAXUINT64; prev_iter = g_sequence_iter_prev (iter); while (!g_sequence_iter_is_begin (prev_iter)) { prev_tc = g_sequence_get (prev_iter); tmp_tckobj = g_hash_table_lookup (timeline->priv->by_object, prev_tc); tmp_tlobj = ges_track_object_get_timeline_object (tmp_tckobj); off1 = timecode > *prev_tc ? timecode - *prev_tc : *prev_tc - timecode; if (prev_tc != current && off1 < off && off1 <= snap_distance && tlobj != tmp_tlobj) { ret = prev_tc; break; } prev_iter = g_sequence_iter_prev (prev_iter); } done: /* We emit the snapping signal only if we snapped with a different value * than the current one */ if (emit) { GstClockTime snap_time = ret ? *ret : GST_CLOCK_TIME_NONE; ges_timeline_emit_snappig (timeline, trackobj, ret); GST_DEBUG_OBJECT (timeline, "Snaping at %" GST_TIME_FORMAT, GST_TIME_ARGS (snap_time)); } return ret; } static inline GESTimelineObject * add_moving_timeline_object (MoveContext * mv_ctx, GESTrackObject * tckobj) { GESTimelineObject *tlobj; GESTimelineLayer *layer; guint layer_prio; tlobj = ges_track_object_get_timeline_object (tckobj); /* Avoid recalculating */ if (!g_hash_table_lookup (mv_ctx->moving_tlobjs, tlobj)) { layer = ges_timeline_object_get_layer (tlobj); if (layer == NULL) { GST_WARNING_OBJECT (tlobj, "Not in any layer, can not move" " between layers"); } else { g_hash_table_insert (mv_ctx->moving_tlobjs, tlobj, tlobj); layer_prio = ges_timeline_layer_get_priority (layer); mv_ctx->min_move_layer = MIN (mv_ctx->min_move_layer, layer_prio); mv_ctx->max_layer_prio = MAX (mv_ctx->max_layer_prio, layer_prio); g_object_unref (layer); } } return tlobj; } static gboolean ges_move_context_set_objects (GESTimeline * timeline, GESTrackObject * obj, GESEdge edge) { TrackObjIters *iters; GESTrackObject *tmptckobj; guint64 start, end, tmpend; GSequenceIter *iter, *tckobj_iter; MoveContext *mv_ctx = &timeline->priv->movecontext; iters = g_hash_table_lookup (timeline->priv->obj_iters, obj); tckobj_iter = iters->iter_obj; switch (edge) { case GES_EDGE_START: /* set it properly int the context of "trimming" */ mv_ctx->max_trim_pos = 0; start = obj->start; if (g_sequence_iter_is_begin (tckobj_iter)) break; /* Look for the objects */ for (iter = g_sequence_iter_prev (tckobj_iter); iter && !g_sequence_iter_is_end (iter); iter = g_sequence_iter_prev (iter)) { tmptckobj = GES_TRACK_OBJECT (g_sequence_get (iter)); tmpend = tmptckobj->start + tmptckobj->duration; if (tmpend <= start) { mv_ctx->max_trim_pos = MAX (mv_ctx->max_trim_pos, tmptckobj->start); mv_ctx->moving_tckobjs = g_list_prepend (mv_ctx->moving_tckobjs, tmptckobj); } if (g_sequence_iter_is_begin (iter)) break; } break; case GES_EDGE_END: case GES_EDGE_NONE: /* In this case only works for ripple */ end = ges_track_object_get_start (obj) + ges_track_object_get_duration (obj); mv_ctx->max_trim_pos = G_MAXUINT64; /* Look for folowing objects */ for (iter = g_sequence_iter_next (tckobj_iter); iter && !g_sequence_iter_is_end (iter); iter = g_sequence_iter_next (iter)) { tmptckobj = GES_TRACK_OBJECT (g_sequence_get (iter)); if (tmptckobj->start >= end) { tmpend = tmptckobj->start + tmptckobj->duration; mv_ctx->max_trim_pos = MIN (mv_ctx->max_trim_pos, tmpend); mv_ctx->moving_tckobjs = g_list_prepend (mv_ctx->moving_tckobjs, tmptckobj); } } break; default: GST_DEBUG ("Edge type %d no supported", edge); return FALSE; } return TRUE; } static gboolean ges_timeline_set_moving_context (GESTimeline * timeline, GESTrackObject * obj, GESEditMode mode, GESEdge edge, GList * layers) { /* A TrackObject that could initiate movement for other object */ GESTrackObject *editor_tckobj = NULL; MoveContext *mv_ctx = &timeline->priv->movecontext; GESTimelineObject *tlobj = ges_track_object_get_timeline_object (obj); /* Still in the same mv_ctx */ if ((mv_ctx->obj == tlobj && mv_ctx->mode == mode && mv_ctx->edge == edge && !mv_ctx->needs_move_ctx)) { GST_DEBUG ("Keeping the same moving mv_ctx"); return TRUE; } GST_DEBUG_OBJECT (tlobj, "Changing context:\nold: obj: %p, mode: %d, edge: %d \n" "new: obj: %p, mode: %d, edge: %d ! Has changed %i", mv_ctx->obj, mv_ctx->mode, mv_ctx->edge, tlobj, mode, edge, mv_ctx->needs_move_ctx); clean_movecontext (mv_ctx); mv_ctx->edge = edge; mv_ctx->mode = mode; mv_ctx->obj = tlobj; mv_ctx->needs_move_ctx = FALSE; /* We try to find a TrackSource inside the TimelineObject so we can set the * moving context Else we just move the selected one only */ if (GES_IS_TRACK_SOURCE (obj) == FALSE) { GList *tmp; for (tmp = tlobj->trackobjects; tmp; tmp = tmp->next) { if (GES_IS_TRACK_SOURCE (tmp->data)) { editor_tckobj = tmp->data; break; } } } else { editor_tckobj = obj; } if (editor_tckobj) { switch (mode) { case GES_EDIT_MODE_RIPPLE: case GES_EDIT_MODE_ROLL: if (!(ges_move_context_set_objects (timeline, editor_tckobj, edge))) return FALSE; default: break; } add_moving_timeline_object (&timeline->priv->movecontext, editor_tckobj); } else { /* We add the main object to the moving_tlobjs set */ add_moving_timeline_object (&timeline->priv->movecontext, obj); } return TRUE; } gboolean ges_timeline_trim_object_simple (GESTimeline * timeline, GESTrackObject * obj, GList * layers, GESEdge edge, guint64 position, gboolean snapping) { guint64 nstart, start, inpoint, duration, max_duration, *snapped, *cur; gboolean ret = TRUE; gint64 real_dur; GST_DEBUG_OBJECT (obj, "Trimming to %" GST_TIME_FORMAT " %s snaping, edge %i", GST_TIME_ARGS (position), snapping ? "Is" : "Not", edge); start = ges_track_object_get_start (obj); g_object_get (obj, "max-duration", &max_duration, NULL); switch (edge) { case GES_EDGE_START: inpoint = obj->inpoint; duration = obj->duration; if (snapping) { cur = g_hash_table_lookup (timeline->priv->by_start, obj); snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE); if (snapped) position = *snapped; } nstart = position; /* Calculate new values */ position = MAX (start > inpoint ? start - inpoint : 0, position); position = MIN (position, start + duration); inpoint = MAX (0, inpoint + position - start); real_dur = start + duration - nstart; /* FIXME: Why CLAMP (0, real_dur, max_duration) doesn't work? */ duration = MAX (0, real_dur); duration = MIN (duration, max_duration - obj->inpoint); ges_track_object_set_start (obj, nstart); ges_track_object_set_duration (obj, duration); ges_track_object_set_inpoint (obj, inpoint); break; case GES_EDGE_END: { cur = g_hash_table_lookup (timeline->priv->by_end, obj); snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE); if (snapped) position = *snapped; /* Calculate new values */ real_dur = position - start; duration = MAX (0, real_dur); duration = MIN (duration, max_duration - obj->inpoint); ges_track_object_set_duration (obj, duration); break; } default: GST_WARNING ("Can not trim with %i GESEdge", edge); return FALSE; } return ret; } gboolean timeline_ripple_object (GESTimeline * timeline, GESTrackObject * obj, GList * layers, GESEdge edge, guint64 position) { GList *tmp, *moved_tlobjs = NULL; GESTrackObject *tckobj; GESTimelineObject *tlobj; guint64 duration, new_start, *snapped, *cur; gint64 offset; MoveContext *mv_ctx = &timeline->priv->movecontext; mv_ctx->ignore_needs_ctx = TRUE; if (!ges_timeline_set_moving_context (timeline, obj, GES_EDIT_MODE_RIPPLE, edge, layers)) goto error; switch (edge) { case GES_EDGE_NONE: GST_DEBUG ("Simply rippling"); cur = g_hash_table_lookup (timeline->priv->by_end, obj); snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE); if (snapped) position = *snapped; offset = position - obj->start; for (tmp = mv_ctx->moving_tckobjs; tmp; tmp = tmp->next) { tckobj = GES_TRACK_OBJECT (tmp->data); new_start = tckobj->start + offset; tlobj = add_moving_timeline_object (mv_ctx, tckobj); if (ges_track_object_is_locked (tckobj) == TRUE) { /* Make sure not to move 2 times the same TimelineObject */ if (g_list_find (moved_tlobjs, tlobj) == NULL) { ges_track_object_set_start (tckobj, new_start); moved_tlobjs = g_list_prepend (moved_tlobjs, tlobj); } } else { ges_track_object_set_start (tckobj, new_start); } } g_list_free (moved_tlobjs); ges_track_object_set_start (obj, position); break; case GES_EDGE_END: GST_DEBUG ("Rippling end"); cur = g_hash_table_lookup (timeline->priv->by_end, obj); snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE); if (snapped) position = *snapped; duration = obj->duration; ges_track_object_set_duration (obj, position - obj->start); offset = obj->duration - duration; for (tmp = mv_ctx->moving_tckobjs; tmp; tmp = tmp->next) { tckobj = GES_TRACK_OBJECT (tmp->data); new_start = tckobj->start + offset; tlobj = add_moving_timeline_object (mv_ctx, tckobj); if (ges_track_object_is_locked (tckobj) == TRUE) { /* Make sure not to move 2 times the same TimelineObject */ if (g_list_find (moved_tlobjs, tlobj) == NULL) { ges_track_object_set_start (tckobj, new_start); moved_tlobjs = g_list_prepend (moved_tlobjs, tlobj); } } else { ges_track_object_set_start (tckobj, new_start); } } g_list_free (moved_tlobjs); GST_DEBUG ("Done Rippling end"); break; case GES_EDGE_START: GST_WARNING ("Ripple start doesn't exist!"); break; default: GST_DEBUG ("Can not ripple edge: %i", edge); break; } mv_ctx->ignore_needs_ctx = FALSE; return TRUE; error: mv_ctx->ignore_needs_ctx = FALSE; return FALSE; } gboolean timeline_slide_object (GESTimeline * timeline, GESTrackObject * obj, GList * layers, GESEdge edge, guint64 position) { /* FIXME implement me! */ GST_WARNING ("Slide mode editing not implemented yet"); return FALSE; } gboolean timeline_trim_object (GESTimeline * timeline, GESTrackObject * object, GList * layers, GESEdge edge, guint64 position) { gboolean ret = FALSE; MoveContext *mv_ctx = &timeline->priv->movecontext; mv_ctx->ignore_needs_ctx = TRUE; if (!ges_timeline_set_moving_context (timeline, object, GES_EDIT_MODE_TRIM, edge, layers)) goto end; ret = ges_timeline_trim_object_simple (timeline, object, layers, edge, position, TRUE); end: mv_ctx->ignore_needs_ctx = FALSE; return ret; } gboolean timeline_roll_object (GESTimeline * timeline, GESTrackObject * obj, GList * layers, GESEdge edge, guint64 position) { MoveContext *mv_ctx = &timeline->priv->movecontext; guint64 start, duration, end, tmpstart, tmpduration, tmpend, *snapped, *cur; gboolean ret = TRUE; GList *tmp; mv_ctx->ignore_needs_ctx = TRUE; GST_DEBUG_OBJECT (obj, "Rolling object to %" GST_TIME_FORMAT, GST_TIME_ARGS (position)); if (!ges_timeline_set_moving_context (timeline, obj, GES_EDIT_MODE_ROLL, edge, layers)) goto error; start = ges_track_object_get_start (obj); duration = ges_track_object_get_duration (obj); end = start + duration; switch (edge) { case GES_EDGE_START: /* Avoid negative durations */ if (position < mv_ctx->max_trim_pos || position > end) goto error; cur = g_hash_table_lookup (timeline->priv->by_start, obj); snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE); if (snapped) position = *snapped; ret &= ges_timeline_trim_object_simple (timeline, obj, layers, GES_EDGE_START, position, FALSE); /* In the case we reached max_duration we just make sure to roll * everything to the real new position */ position = obj->start; /* Send back changes to the neighbourhood */ for (tmp = mv_ctx->moving_tckobjs; tmp; tmp = tmp->next) { GESTrackObject *tmptckobj = GES_TRACK_OBJECT (tmp->data); tmpstart = ges_track_object_get_start (tmptckobj); tmpduration = ges_track_object_get_duration (tmptckobj); tmpend = tmpstart + tmpduration; /* Check that the object should be resized at this position * even if an error accurs, we keep doing our job */ if (tmpend == start) { ret &= ges_timeline_trim_object_simple (timeline, tmptckobj, NULL, GES_EDGE_END, position, FALSE); break; } } break; case GES_EDGE_END: /* Avoid negative durations */ if (position > mv_ctx->max_trim_pos || position < start) goto error; end = obj->start + obj->duration; cur = g_hash_table_lookup (timeline->priv->by_end, obj); snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE); if (snapped) position = *snapped; ret &= ges_timeline_trim_object_simple (timeline, obj, NULL, GES_EDGE_END, position, FALSE); /* In the case we reached max_duration we just make sure to roll * everything to the real new position */ position = obj->start + obj->duration; /* Send back changes to the neighbourhood */ for (tmp = mv_ctx->moving_tckobjs; tmp; tmp = tmp->next) { GESTrackObject *tmptckobj = GES_TRACK_OBJECT (tmp->data); tmpstart = ges_track_object_get_start (tmptckobj); tmpduration = ges_track_object_get_duration (tmptckobj); tmpend = tmpstart + tmpduration; /* Check that the object should be resized at this position * even if an error accure, we keep doing our job */ if (end == tmpstart) { ret &= ges_timeline_trim_object_simple (timeline, tmptckobj, NULL, GES_EDGE_START, position, FALSE); } } break; default: GST_DEBUG ("Edge type %i not handled here", edge); break; } mv_ctx->ignore_needs_ctx = FALSE; return ret; error: mv_ctx->ignore_needs_ctx = FALSE; GST_DEBUG_OBJECT (obj, "Could not roll edge %d to %" GST_TIME_FORMAT, edge, GST_TIME_ARGS (position)); return FALSE; } gboolean timeline_move_object (GESTimeline * timeline, GESTrackObject * object, GList * layers, GESEdge edge, guint64 position) { if (!ges_timeline_set_moving_context (timeline, object, GES_EDIT_MODE_RIPPLE, edge, layers)) { GST_DEBUG_OBJECT (object, "Could not move to %" GST_TIME_FORMAT, GST_TIME_ARGS (position)); return FALSE; } return ges_timeline_move_object_simple (timeline, object, layers, edge, position); } gboolean ges_timeline_move_object_simple (GESTimeline * timeline, GESTrackObject * object, GList * layers, GESEdge edge, guint64 position) { guint64 *snap_end, *snap_st, *cur, off1, off2, end; end = position + object->duration; cur = g_hash_table_lookup (timeline->priv->by_end, object); GST_DEBUG_OBJECT (timeline, "Moving to %" GST_TIME_FORMAT " (end %" GST_TIME_FORMAT ")", GST_TIME_ARGS (position), GST_TIME_ARGS (end)); snap_end = ges_timeline_snap_position (timeline, object, cur, end, FALSE); if (snap_end) off1 = end > *snap_end ? end - *snap_end : *snap_end - end; else off1 = G_MAXUINT64; cur = g_hash_table_lookup (timeline->priv->by_start, object); snap_st = ges_timeline_snap_position (timeline, object, cur, position, FALSE); if (snap_st) off2 = position > *snap_st ? position - *snap_st : *snap_st - position; else off2 = G_MAXUINT64; /* In the case we could snap on both sides, we snap on the end */ if (snap_end && off1 <= off2) { position = position + *snap_end - end; ges_timeline_emit_snappig (timeline, object, snap_end); } else if (snap_st) { position = position + *snap_st - position; ges_timeline_emit_snappig (timeline, object, snap_st); } else ges_timeline_emit_snappig (timeline, object, NULL); ges_track_object_set_start (object, position); return TRUE; } gboolean timeline_context_to_layer (GESTimeline * timeline, gint offset) { gboolean ret = TRUE; MoveContext *mv_ctx = &timeline->priv->movecontext; /* Layer's priority is always positive */ if (offset != 0 && (offset > 0 || mv_ctx->min_move_layer >= -offset)) { GHashTableIter iter; GESTimelineObject *key, *value; GESTimelineLayer *new_layer, *layer; guint prio; mv_ctx->ignore_needs_ctx = TRUE; GST_DEBUG ("Moving %d object, offset %d", g_hash_table_size (mv_ctx->moving_tlobjs), offset); g_hash_table_iter_init (&iter, mv_ctx->moving_tlobjs); while (g_hash_table_iter_next (&iter, (gpointer *) & key, (gpointer *) & value)) { layer = ges_timeline_object_get_layer (value); prio = ges_timeline_layer_get_priority (layer); /* We know that the layer exists as we created it */ new_layer = GES_TIMELINE_LAYER (g_list_nth_data (timeline->priv->layers, prio + offset)); if (new_layer == NULL) { do { new_layer = ges_timeline_append_layer (timeline); } while (ges_timeline_layer_get_priority (new_layer) < prio + offset); } ret &= ges_timeline_object_move_to_layer (key, new_layer); g_object_unref (layer); } /* Readjust min_move_layer */ mv_ctx->min_move_layer = mv_ctx->min_move_layer + offset; mv_ctx->ignore_needs_ctx = FALSE; } return ret; } static void add_object_to_track (GESTimelineObject * object, GESTrack * track) { if (!ges_timeline_object_create_track_objects (object, track)) { if ((track->type & ges_timeline_object_get_supported_formats (object))) { GST_WARNING ("Error creating track objects"); } } } static void add_object_to_tracks (GESTimeline * timeline, GESTimelineObject * object) { GList *tmp; for (tmp = timeline->priv->tracks; tmp; tmp = g_list_next (tmp)) { TrackPrivate *tr_priv = (TrackPrivate *) tmp->data; GESTrack *track = tr_priv->track; GST_LOG ("Trying with track %p", track); add_object_to_track (object, track); } } static void layer_object_added_cb (GESTimelineLayer * layer, GESTimelineObject * object, GESTimeline * timeline) { if (ges_timeline_object_is_moving_from_layer (object)) { GST_DEBUG ("TimelineObject %p is moving from a layer to another, not doing" " anything on it", object); timeline->priv->movecontext.needs_move_ctx = TRUE; return; } GST_DEBUG ("New TimelineObject %p added to layer %p", object, layer); add_object_to_tracks (timeline, object); GST_DEBUG ("Done"); } static void layer_priority_changed_cb (GESTimelineLayer * layer, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { timeline->priv->layers = g_list_sort (timeline->priv->layers, (GCompareFunc) sort_layers); } static void layer_object_removed_cb (GESTimelineLayer * layer, GESTimelineObject * object, GESTimeline * timeline) { GList *trackobjects, *tmp; if (ges_timeline_object_is_moving_from_layer (object)) { GST_DEBUG ("TimelineObject %p is moving from a layer to another, not doing" " anything on it", object); return; } GST_DEBUG ("TimelineObject %p removed from layer %p", object, layer); /* Go over the object's track objects and figure out which one belongs to * the list of tracks we control */ trackobjects = ges_timeline_object_get_track_objects (object); for (tmp = trackobjects; tmp; tmp = tmp->next) { GESTrackObject *trobj = (GESTrackObject *) tmp->data; GST_DEBUG ("Trying to remove TrackObject %p", trobj); if (G_LIKELY (g_list_find_custom (timeline->priv->tracks, ges_track_object_get_track (trobj), (GCompareFunc) custom_find_track))) { GST_DEBUG ("Belongs to one of the tracks we control"); ges_track_remove_object (ges_track_object_get_track (trobj), trobj); ges_timeline_object_release_track_object (object, trobj); } /* removing the reference added by _get_track_objects() */ g_object_unref (trobj); } g_list_free (trackobjects); GST_DEBUG ("Done"); } static void trackobj_start_changed_cb (GESTrackObject * child, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { sort_track_objects (timeline); sort_starts_ends_start (timeline, child); sort_starts_ends_end (timeline, child); /* If the timeline is set to snap objects together, we * are sure that all movement of TrackObject-s are done within * the moving context, so we do not need to recalculate the * move context as often */ if (timeline->priv->movecontext.ignore_needs_ctx && timeline->priv->snapping_distance == 0) timeline->priv->movecontext.needs_move_ctx = TRUE; } static void trackobj_duration_changed_cb (GESTrackObject * child, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { sort_starts_ends_end (timeline, child); /* If the timeline is set to snap objects together, we * are sure that all movement of TrackObject-s are done within * the moving context, so we do not need to recalculate the * move context as often */ if (timeline->priv->movecontext.ignore_needs_ctx && timeline->priv->snapping_distance == 0) timeline->priv->movecontext.needs_move_ctx = TRUE; } static void track_object_added_cb (GESTrack * track, GESTrackObject * object, GESTimeline * timeline) { /* We only work with sources */ if (GES_IS_TRACK_SOURCE (object)) { start_tracking_track_obj (timeline, object); g_signal_connect (GES_TRACK_OBJECT (object), "notify::start", G_CALLBACK (trackobj_start_changed_cb), timeline); g_signal_connect (GES_TRACK_OBJECT (object), "notify::duration", G_CALLBACK (trackobj_duration_changed_cb), timeline); } } static void track_object_removed_cb (GESTrack * track, GESTrackObject * object, GESTimeline * timeline) { /* We only work with sources */ if (GES_IS_TRACK_SOURCE (object)) { g_signal_handlers_disconnect_by_func (object, trackobj_start_changed_cb, NULL); g_signal_handlers_disconnect_by_func (object, trackobj_duration_changed_cb, NULL); /* Make sure to reinitialise the moving context next time */ timeline->priv->movecontext.needs_move_ctx = TRUE; stop_tracking_for_snapping (timeline, object); } } static void pad_added_cb (GESTrack * track, GstPad * pad, TrackPrivate * tr_priv) { gchar *padname; gboolean no_more; GList *tmp; GST_DEBUG ("track:%p, pad:%s:%s", track, GST_DEBUG_PAD_NAME (pad)); if (G_UNLIKELY (tr_priv->pad)) { GST_WARNING ("We are already controlling a pad for this track"); return; } /* Remember the pad */ GST_OBJECT_LOCK (track); tr_priv->pad = pad; no_more = TRUE; for (tmp = tr_priv->timeline->priv->tracks; tmp; tmp = g_list_next (tmp)) { TrackPrivate *tr_priv = (TrackPrivate *) tmp->data; if (!tr_priv->pad) { GST_LOG ("Found track without pad %p", tr_priv->track); no_more = FALSE; } } GST_OBJECT_UNLOCK (track); /* ghost it ! */ GST_DEBUG ("Ghosting pad and adding it to ourself"); padname = g_strdup_printf ("track_%p_src", track); tr_priv->ghostpad = gst_ghost_pad_new (padname, pad); g_free (padname); gst_pad_set_active (tr_priv->ghostpad, TRUE); gst_element_add_pad (GST_ELEMENT (tr_priv->timeline), tr_priv->ghostpad); if (no_more) { GST_DEBUG ("Signaling no-more-pads"); gst_element_no_more_pads (GST_ELEMENT (tr_priv->timeline)); } } static void pad_removed_cb (GESTrack * track, GstPad * pad, TrackPrivate * tr_priv) { GST_DEBUG ("track:%p, pad:%s:%s", track, GST_DEBUG_PAD_NAME (pad)); if (G_UNLIKELY (tr_priv->pad != pad)) { GST_WARNING ("Not the pad we're controlling"); return; } if (G_UNLIKELY (tr_priv->ghostpad == NULL)) { GST_WARNING ("We don't have a ghostpad for this pad !"); return; } GST_DEBUG ("Removing ghostpad"); gst_pad_set_active (tr_priv->ghostpad, FALSE); gst_element_remove_pad (GST_ELEMENT (tr_priv->timeline), tr_priv->ghostpad); tr_priv->ghostpad = NULL; tr_priv->pad = NULL; } /**** API *****/ /** * ges_timeline_new: * * Creates a new empty #GESTimeline. * * Returns: The new timeline. */ GESTimeline * ges_timeline_new (void) { return g_object_new (GES_TYPE_TIMELINE, NULL); } /** * ges_timeline_new_from_uri: * @uri: the URI to load from * * Creates a timeline from the given URI. * * Returns: A new timeline if the uri was loaded successfully, or NULL if the * uri could not be loaded */ GESTimeline * ges_timeline_new_from_uri (const gchar * uri, GError ** error) { GESTimeline *ret; /* FIXME : we should have a GError** argument so the user can know why * it wasn't able to load the uri */ ret = ges_timeline_new (); if (!ges_timeline_load_from_uri (ret, uri, error)) { g_object_unref (ret); return NULL; } return ret; } /** * ges_timeline_load_from_uri: * @timeline: an empty #GESTimeline into which to load the formatter * @uri: The URI to load from * * Loads the contents of URI into the given timeline. * * Returns: TRUE if the timeline was loaded successfully, or FALSE if the uri * could not be loaded. */ gboolean ges_timeline_load_from_uri (GESTimeline * timeline, const gchar * uri, GError ** error) { GST_FIXME ("This should be reimplemented"); return FALSE; } /** * ges_timeline_save_to_uri: * @timeline: a #GESTimeline * @uri: The location to save to * * Saves the timeline to the given location * * Returns: TRUE if the timeline was successfully saved to the given location, * else FALSE. */ gboolean ges_timeline_save_to_uri (GESTimeline * timeline, const gchar * uri, GError ** error) { GST_FIXME ("This should be reimplemented"); return FALSE; } /** * ges_timeline_append_layer: * @timeline: a #GESTimeline * * Append a newly created #GESTimelineLayer to @timeline * Note that you do not own any reference to the returned layer. * * Returns: (transfer none): The newly created #GESTimelineLayer, or the last (empty) * #GESTimelineLayer of @timeline. */ GESTimelineLayer * ges_timeline_append_layer (GESTimeline * timeline) { guint32 priority; GESTimelinePrivate *priv = timeline->priv; GESTimelineLayer *layer; layer = ges_timeline_layer_new (); priority = g_list_length (priv->layers); ges_timeline_layer_set_priority (layer, priority); ges_timeline_add_layer (timeline, layer); return layer; } /** * ges_timeline_add_layer: * @timeline: a #GESTimeline * @layer: the #GESTimelineLayer to add * * Add the layer to the timeline. The reference to the @layer will be stolen * by the @timeline. * * Returns: TRUE if the layer was properly added, else FALSE. */ gboolean ges_timeline_add_layer (GESTimeline * timeline, GESTimelineLayer * layer) { GList *objects, *tmp; GESTimelinePrivate *priv = timeline->priv; GST_DEBUG ("timeline:%p, layer:%p", timeline, layer); /* We can only add a layer that doesn't already belong to another timeline */ if (G_UNLIKELY (layer->timeline)) { GST_WARNING ("Layer belongs to another timeline, can't add it"); return FALSE; } /* Add to the list of layers, make sure we don't already control it */ if (G_UNLIKELY (g_list_find (priv->layers, (gconstpointer) layer))) { GST_WARNING ("Layer is already controlled by this timeline"); return FALSE; } g_object_ref_sink (layer); priv->layers = g_list_insert_sorted (priv->layers, layer, (GCompareFunc) sort_layers); /* Inform the layer that it belongs to a new timeline */ ges_timeline_layer_set_timeline (layer, timeline); /* Connect to 'object-added'/'object-removed' signal from the new layer */ g_signal_connect (layer, "object-added", G_CALLBACK (layer_object_added_cb), timeline); g_signal_connect (layer, "object-removed", G_CALLBACK (layer_object_removed_cb), timeline); g_signal_connect (layer, "notify::priority", G_CALLBACK (layer_priority_changed_cb), timeline); GST_DEBUG ("Done adding layer, emitting 'layer-added' signal"); g_signal_emit (timeline, ges_timeline_signals[LAYER_ADDED], 0, layer); /* add any existing timeline objects to the timeline */ objects = ges_timeline_layer_get_objects (layer); for (tmp = objects; tmp; tmp = tmp->next) { layer_object_added_cb (layer, tmp->data, timeline); g_object_unref (tmp->data); tmp->data = NULL; } g_list_free (objects); return TRUE; } /** * ges_timeline_remove_layer: * @timeline: a #GESTimeline * @layer: the #GESTimelineLayer to remove * * Removes the layer from the timeline. The reference that the @timeline holds on * the layer will be dropped. If you wish to use the @layer after calling this * method, you need to take a reference before calling. * * Returns: TRUE if the layer was properly removed, else FALSE. */ gboolean ges_timeline_remove_layer (GESTimeline * timeline, GESTimelineLayer * layer) { GList *layer_objects, *tmp; GESTimelinePrivate *priv = timeline->priv; GST_DEBUG ("timeline:%p, layer:%p", timeline, layer); if (G_UNLIKELY (!g_list_find (priv->layers, layer))) { GST_WARNING ("Layer doesn't belong to this timeline"); return FALSE; } /* remove objects from any private data structures */ layer_objects = ges_timeline_layer_get_objects (layer); for (tmp = layer_objects; tmp; tmp = tmp->next) { layer_object_removed_cb (layer, GES_TIMELINE_OBJECT (tmp->data), timeline); g_object_unref (G_OBJECT (tmp->data)); tmp->data = NULL; } g_list_free (layer_objects); /* Disconnect signals */ GST_DEBUG ("Disconnecting signal callbacks"); g_signal_handlers_disconnect_by_func (layer, layer_object_added_cb, timeline); g_signal_handlers_disconnect_by_func (layer, layer_object_removed_cb, timeline); priv->layers = g_list_remove (priv->layers, layer); ges_timeline_layer_set_timeline (layer, NULL); g_signal_emit (timeline, ges_timeline_signals[LAYER_REMOVED], 0, layer); g_object_unref (layer); return TRUE; } /** * ges_timeline_add_track: * @timeline: a #GESTimeline * @track: the #GESTrack to add * * Add a track to the timeline. The reference to the track will be stolen by the * pipeline. * * Returns: TRUE if the track was properly added, else FALSE. */ /* FIXME: create track objects for timeline objects which have already been * added to existing layers. */ gboolean ges_timeline_add_track (GESTimeline * timeline, GESTrack * track) { TrackPrivate *tr_priv; GESTimelinePrivate *priv = timeline->priv; GList *tmp; GST_DEBUG ("timeline:%p, track:%p", timeline, track); /* make sure we don't already control it */ if (G_UNLIKELY (g_list_find_custom (priv->tracks, (gconstpointer) track, (GCompareFunc) custom_find_track))) { GST_WARNING ("Track is already controlled by this timeline"); return FALSE; } /* Add the track to ourself (as a GstBin) * Reference is stolen ! */ if (G_UNLIKELY (!gst_bin_add (GST_BIN (timeline), GST_ELEMENT (track)))) { GST_WARNING ("Couldn't add track to ourself (GST)"); return FALSE; } tr_priv = g_new0 (TrackPrivate, 1); tr_priv->timeline = timeline; tr_priv->track = track; /* Add the track to the list of tracks we track */ priv->tracks = g_list_append (priv->tracks, tr_priv); /* Listen to pad-added/-removed */ g_signal_connect (track, "pad-added", (GCallback) pad_added_cb, tr_priv); g_signal_connect (track, "pad-removed", (GCallback) pad_removed_cb, tr_priv); /* Inform the track that it's currently being used by ourself */ ges_track_set_timeline (track, timeline); GST_DEBUG ("Done adding track, emitting 'track-added' signal"); /* emit 'track-added' */ g_signal_emit (timeline, ges_timeline_signals[TRACK_ADDED], 0, track); /* ensure that each existing timeline object has the opportunity to create a * track object for this track*/ /* We connect to the object for the timeline editing mode management */ g_signal_connect (G_OBJECT (track), "track-object-added", G_CALLBACK (track_object_added_cb), timeline); g_signal_connect (G_OBJECT (track), "track-object-removed", G_CALLBACK (track_object_removed_cb), timeline); for (tmp = priv->layers; tmp; tmp = tmp->next) { GList *objects, *obj; objects = ges_timeline_layer_get_objects (tmp->data); for (obj = objects; obj; obj = obj->next) { add_object_to_track (obj->data, track); g_object_unref (obj->data); obj->data = NULL; } g_list_free (objects); } return TRUE; } /** * ges_timeline_remove_track: * @timeline: a #GESTimeline * @track: the #GESTrack to remove * * Remove the @track from the @timeline. The reference stolen when adding the * @track will be removed. If you wish to use the @track after calling this * function you must ensure that you have a reference to it. * * Returns: TRUE if the @track was properly removed, else FALSE. */ /* FIXME: release any track objects associated with this layer. currenly this * will not happen if you remove the track before removing *all* * timelineobjects which have a track object in this track. */ gboolean ges_timeline_remove_track (GESTimeline * timeline, GESTrack * track) { GList *tmp; TrackPrivate *tr_priv; GESTimelinePrivate *priv = timeline->priv; GST_DEBUG ("timeline:%p, track:%p", timeline, track); if (G_UNLIKELY (!(tmp = g_list_find_custom (priv->tracks, (gconstpointer) track, (GCompareFunc) custom_find_track)))) { GST_WARNING ("Track doesn't belong to this timeline"); return FALSE; } tr_priv = tmp->data; priv->tracks = g_list_remove (priv->tracks, tr_priv); ges_track_set_timeline (track, NULL); /* Remove ghost pad */ if (tr_priv->ghostpad) { GST_DEBUG ("Removing ghostpad"); gst_pad_set_active (tr_priv->ghostpad, FALSE); gst_ghost_pad_set_target ((GstGhostPad *) tr_priv->ghostpad, NULL); gst_element_remove_pad (GST_ELEMENT (timeline), tr_priv->ghostpad); } /* Remove pad-added/-removed handlers */ g_signal_handlers_disconnect_by_func (track, pad_added_cb, tr_priv); g_signal_handlers_disconnect_by_func (track, pad_removed_cb, tr_priv); g_signal_handlers_disconnect_by_func (track, track_object_added_cb, timeline); g_signal_handlers_disconnect_by_func (track, track_object_removed_cb, timeline); /* Signal track removal to all layers/objects */ g_signal_emit (timeline, ges_timeline_signals[TRACK_REMOVED], 0, track); /* remove track from our bin */ gst_object_ref (track); if (G_UNLIKELY (!gst_bin_remove (GST_BIN (timeline), GST_ELEMENT (track)))) { GST_WARNING ("Couldn't remove track to ourself (GST)"); gst_object_unref (track); return FALSE; } /* set track state to NULL */ gst_element_set_state (GST_ELEMENT (track), GST_STATE_NULL); gst_object_unref (track); g_free (tr_priv); return TRUE; } /** * ges_timeline_get_track_for_pad: * @timeline: The #GESTimeline * @pad: The #GstPad * * Search the #GESTrack corresponding to the given @timeline's @pad. * * Returns: (transfer none): The corresponding #GESTrack if it is found, * or %NULL if there is an error. */ GESTrack * ges_timeline_get_track_for_pad (GESTimeline * timeline, GstPad * pad) { GList *tmp; for (tmp = timeline->priv->tracks; tmp; tmp = g_list_next (tmp)) { TrackPrivate *tr_priv = (TrackPrivate *) tmp->data; if (pad == tr_priv->ghostpad) return tr_priv->track; } return NULL; } /** * ges_timeline_get_tracks: * @timeline: a #GESTimeline * * Returns the list of #GESTrack used by the Timeline. * * Returns: (transfer full) (element-type GESTrack): A list of #GESTrack. * The caller should unref each track once he is done with them. */ GList * ges_timeline_get_tracks (GESTimeline * timeline) { GList *tmp, *res = NULL; for (tmp = timeline->priv->tracks; tmp; tmp = g_list_next (tmp)) { TrackPrivate *tr_priv = (TrackPrivate *) tmp->data; res = g_list_append (res, g_object_ref (tr_priv->track)); } return res; } /** * ges_timeline_get_layers: * @timeline: a #GESTimeline * * Get the list of #GESTimelineLayer present in the Timeline. * * Returns: (transfer full) (element-type GESTimelineLayer): the list of * #GESTimelineLayer present in the Timeline sorted by priority. * The caller should unref each Layer once he is done with them. */ GList * ges_timeline_get_layers (GESTimeline * timeline) { GList *tmp, *res = NULL; for (tmp = timeline->priv->layers; tmp; tmp = g_list_next (tmp)) { res = g_list_insert_sorted (res, g_object_ref (tmp->data), (GCompareFunc) sort_layers); } return res; } /** * ges_timeline_is_updating: * @timeline: a #GESTimeline * * Get whether the timeline is updated for every change happening within or not. * * Returns: %TRUE if @timeline is updating on every changes, else %FALSE. */ gboolean ges_timeline_is_updating (GESTimeline * timeline) { GList *tmp; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); for (tmp = timeline->priv->tracks; tmp; tmp = tmp->next) { if (!ges_track_is_updating (((TrackPrivate *) tmp->data)->track)) return FALSE; } return TRUE; } /** * ges_timeline_enable_update: * @timeline: a #GESTimeline * @enabled: Whether the timeline should update on every change or not. * * Control whether the timeline is updated for every change happening within. * * Users will want to use this method with %FALSE before doing lots of changes, * and then call again with %TRUE for the changes to take effect in one go. * * Returns: %TRUE if the update status could be changed, else %FALSE. */ gboolean ges_timeline_enable_update (GESTimeline * timeline, gboolean enabled) { if (ges_timeline_enable_update_internal (timeline, enabled)) { g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_UPDATE]); return TRUE; } return FALSE; } /** * ges_timeline_get_duration: * @timeline: a #GESTimeline * * Get the current duration of @timeline * * Returns: The current duration of @timeline */ GstClockTime ges_timeline_get_duration (GESTimeline * timeline) { g_return_val_if_fail (GES_IS_TIMELINE (timeline), GST_CLOCK_TIME_NONE); return timeline->priv->duration; }