/* GStreamer Editing Services * Copyright (C) 2009 Edward Hervey * 2009 Nokia Corporation * 2012 Thibault Saunier * 2012 Collabora Ltd. * Author: Sebastian Dröge * * 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 #GESLayer which users should use to arrange the * various clips 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 * * Note that any change you make in the timeline will not actually be taken * into account until you call the #ges_timeline_commit method. */ #include "ges-internal.h" #include "ges-project.h" #include "ges-container.h" #include "ges-timeline.h" #include "ges-track.h" #include "ges-layer.h" #include "ges-auto-transition.h" #include "ges.h" typedef struct _MoveContext MoveContext; static GPtrArray *select_tracks_for_object_default (GESTimeline * timeline, GESClip * clip, GESTrackElement * tr_obj, gpointer user_data); static inline void init_movecontext (MoveContext * mv_ctx, gboolean first_init); static void ges_extractable_interface_init (GESExtractableInterface * iface); static void ges_meta_container_interface_init (GESMetaContainerInterface * iface); G_DEFINE_TYPE_WITH_CODE (GESTimeline, ges_timeline, GST_TYPE_BIN, G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init) G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER, ges_meta_container_interface_init)); GST_DEBUG_CATEGORY_STATIC (ges_timeline_debug); #undef GST_CAT_DEFAULT #define GST_CAT_DEFAULT ges_timeline_debug /* lock to protect dynamic callbacks, like pad-added */ #define DYN_LOCK(timeline) (&GES_TIMELINE (timeline)->priv->dyn_mutex) #define LOCK_DYN(timeline) G_STMT_START { \ GST_INFO_OBJECT (timeline, "Getting dynamic lock from %p", \ g_thread_self()); \ g_rec_mutex_lock (DYN_LOCK (timeline)); \ GST_INFO_OBJECT (timeline, "Got Dynamic lock from %p", \ g_thread_self()); \ } G_STMT_END #define UNLOCK_DYN(timeline) G_STMT_START { \ GST_INFO_OBJECT (timeline, "Unlocking dynamic lock from %p", \ g_thread_self()); \ g_rec_mutex_unlock (DYN_LOCK (timeline)); \ GST_INFO_OBJECT (timeline, "Unlocked Dynamic lock from %p", \ g_thread_self()); \ } G_STMT_END typedef struct TrackObjIters { GSequenceIter *iter_start; GSequenceIter *iter_end; GSequenceIter *iter_obj; GSequenceIter *iter_by_layer; GESLayer *layer; GESTrackElement *trackelement; } 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 { GESClip *clip; GESEdge edge; GESEditMode mode; /* Ripple and Roll Objects */ GList *moving_trackelements; /* We use it as a set of Clip to move between layers */ GHashTable *moving_clips; /* Min priority of the objects currently in moving_clips */ guint min_move_layer; /* Max priority of the objects currently in moving_clips */ 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 element * properties so we don't end up always needing new move context */ gboolean ignore_needs_ctx; gboolean needs_move_ctx; /* Last snapping properties */ GESTrackElement *last_snaped1; GESTrackElement *last_snaped2; GstClockTime *last_snap_ts; }; struct _GESTimelinePrivate { /* The duration of the timeline */ gint64 duration; /* The auto-transition of the timeline */ gboolean auto_transition; /* 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 Source also * be tracked? */ /* Snapping fields */ GHashTable *by_start; /* {Source: start} */ GHashTable *by_end; /* {Source: end} */ GHashTable *by_object; /* {timecode: Source} */ GHashTable *obj_iters; /* {Source: TrackObjIters} */ GSequence *starts_ends; /* Sorted list of starts/ends */ /* We keep 1 reference to our trackelement here */ GSequence *tracksources; /* Source-s sorted by start/priorities */ GRecMutex dyn_mutex; GList *priv_tracks; /* FIXME: We should definitly offer an API over this, * probably through a ges_layer_get_track_elements () method */ GHashTable *by_layer; /* {layer: GSequence of TrackElement by start/priorities} */ /* The set of auto_transitions we control, currently the key is * pointerToPreviousiTrackObjAdresspointerToNextTrackObjAdress as a string, * ... not really optimal but it works */ GHashTable *auto_transitions; MoveContext movecontext; /* This variable is set to %TRUE when it makes sense to update the transitions, * and %FALSE otherwize */ gboolean needs_transitions_update; /* While we are creating and adding the TrackElements for a clip, we need to * ignore the child-added signal */ GESClip *ignore_track_element_added; }; /* 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_AUTO_TRANSITION, PROP_SNAPPING_DISTANCE, PROP_UPDATE, PROP_LAST }; static GParamSpec *properties[PROP_LAST]; enum { TRACK_ADDED, TRACK_REMOVED, LAYER_ADDED, LAYER_REMOVED, SNAPING_STARTED, SNAPING_ENDED, SELECT_TRACKS_FOR_OBJECT, LAST_SIGNAL }; static GstBinClass *parent_class; static guint ges_timeline_signals[LAST_SIGNAL] = { 0 }; static gint custom_find_track (TrackPrivate * tr_priv, GESTrack * track); static guint nb_assets = 0; /* GESExtractable implementation */ static gchar * extractable_check_id (GType type, const gchar * id) { gchar *res; if (id == NULL) res = g_strdup_printf ("%s-%i", "project", nb_assets); else res = g_strdup (id); nb_assets++; return res; } static gchar * extractable_get_id (GESExtractable * self) { GESAsset *asset; if (!(asset = ges_extractable_get_asset (self))) return NULL; return g_strdup (ges_asset_get_id (asset)); } static void ges_extractable_interface_init (GESExtractableInterface * iface) { iface->asset_type = GES_TYPE_PROJECT; iface->check_id = (GESExtractableCheckId) extractable_check_id; iface->get_id = extractable_get_id; } static void ges_meta_container_interface_init (GESMetaContainerInterface * iface) { } /* 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) { case PROP_DURATION: g_value_set_uint64 (value, timeline->priv->duration); break; case PROP_AUTO_TRANSITION: g_value_set_boolean (value, timeline->priv->auto_transition); break; case PROP_SNAPPING_DISTANCE: g_value_set_uint64 (value, timeline->priv->snapping_distance); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } 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_AUTO_TRANSITION: ges_timeline_set_auto_transition (timeline, g_value_get_boolean (value)); break; case PROP_SNAPPING_DISTANCE: timeline->priv->snapping_distance = g_value_get_uint64 (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void ges_timeline_dispose (GObject * object) { GESTimeline *tl = GES_TIMELINE (object); GESTimelinePrivate *priv = tl->priv; while (tl->layers) { GESLayer *layer = (GESLayer *) tl->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 (tl->tracks) { ges_timeline_remove_track (GES_TIMELINE (object), tl->tracks->data); } 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->by_layer); g_hash_table_unref (priv->obj_iters); g_sequence_free (priv->starts_ends); g_sequence_free (priv->tracksources); g_list_free (priv->movecontext.moving_trackelements); g_hash_table_unref (priv->movecontext.moving_clips); g_hash_table_unref (priv->auto_transitions); 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); } /* we collect the first result */ static gboolean _gst_array_accumulator (GSignalInvocationHint * ihint, GValue * return_accu, const GValue * handler_return, gpointer dummy) { gpointer array; array = g_value_get_boxed (handler_return); if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) g_value_set_boxed (return_accu, array); return FALSE; } static void ges_timeline_class_init (GESTimelineClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); g_type_class_add_private (klass, sizeof (GESTimelinePrivate)); GST_DEBUG_CATEGORY_INIT (ges_timeline_debug, "gestimeline", GST_DEBUG_FG_YELLOW, "ges timeline"); 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:auto-transition: * * Sets whether transitions are added automagically when clips overlap. */ g_object_class_install_property (object_class, PROP_AUTO_TRANSITION, g_param_spec_boolean ("auto-transition", "Auto-Transition", "whether the transitions are added", FALSE, G_PARAM_READWRITE)); /** * 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::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 #GESLayer 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_LAYER); /** * GESTimeline::layer-removed: * @timeline: the #GESTimeline * @layer: the #GESLayer 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_LAYER); /** * GESTimeline::track-elements-snapping: * @timeline: the #GESTimeline * @obj1: the first #GESTrackElement that was snapping. * @obj2: the second #GESTrackElement that was snapping. * @position: the position where the two objects finally snapping. * * Will be emitted when the 2 #GESTrackElement 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_ELEMENT, GES_TYPE_TRACK_ELEMENT, G_TYPE_UINT64); /** * GESTimeline::snapping-end: * @timeline: the #GESTimeline * @obj1: the first #GESTrackElement that was snapping. * @obj2: the second #GESTrackElement that was snapping. * @position: the position where the two objects finally snapping. * * Will be emitted when the 2 #GESTrackElement 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_ELEMENT, GES_TYPE_TRACK_ELEMENT, G_TYPE_UINT64); /** * GESTimeline::select-tracks-for-object: * @timeline: the #GESTimeline * @clip: The #GESClip on which @track-element will land * @track-element: The #GESTrackElement for which to choose the tracks it should land into * * Returns: (transfer full) (element-type GESTrack): a #GPtrArray of #GESTrack-s where that object should be added * * Since: 0.10.XX */ ges_timeline_signals[SELECT_TRACKS_FOR_OBJECT] = g_signal_new ("select-tracks-for-object", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, _gst_array_accumulator, NULL, NULL, G_TYPE_PTR_ARRAY, 2, GES_TYPE_CLIP, GES_TYPE_TRACK_ELEMENT); } static void ges_timeline_init (GESTimeline * self) { GESTimelinePrivate *priv = self->priv; self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GES_TYPE_TIMELINE, GESTimelinePrivate); priv = self->priv; self->layers = NULL; self->tracks = NULL; self->priv->duration = 0; self->priv->auto_transition = FALSE; priv->snapping_distance = 0; /* Move context initialization */ init_movecontext (&self->priv->movecontext, TRUE); priv->movecontext.ignore_needs_ctx = FALSE; priv->priv_tracks = NULL; 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->by_layer = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, (GDestroyNotify) g_sequence_free); 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 (gst_object_unref); priv->auto_transitions = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, gst_object_unref); priv->needs_transitions_update = TRUE; g_signal_connect_after (self, "select-tracks-for-object", G_CALLBACK (select_tracks_for_object_default), NULL); } /* Private methods */ /* Sorting utils*/ static gint sort_layers (gpointer a, gpointer b) { GESLayer *layer_a, *layer_b; guint prio_a, prio_b; layer_a = GES_LAYER (a); layer_b = GES_LAYER (b); prio_a = ges_layer_get_priority (layer_a); prio_b = ges_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 find_layer_by_prio (GESLayer * a, gpointer pprio) { gint prio = GPOINTER_TO_INT (pprio), lprio = ges_layer_get_priority (a); if (lprio < prio) return -1; if (lprio > prio) return 1; return 0; } static void sort_track_elements (GESTimeline * timeline, TrackObjIters * iters) { g_sequence_sort_changed (iters->iter_obj, (GCompareDataFunc) element_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, TrackObjIters * iters) { GESTimelineElement *obj = GES_TIMELINE_ELEMENT (iters->trackelement); GESTimelinePrivate *priv = timeline->priv; guint64 *end = g_hash_table_lookup (priv->by_end, obj); *end = _START (obj) + _DURATION (obj); g_sequence_sort_changed (iters->iter_end, (GCompareDataFunc) compare_uint64, NULL); timeline_update_duration (timeline); } static inline void sort_starts_ends_start (GESTimeline * timeline, TrackObjIters * iters) { GESTimelineElement *obj = GES_TIMELINE_ELEMENT (iters->trackelement); GESTimelinePrivate *priv = timeline->priv; guint64 *start = g_hash_table_lookup (priv->by_start, obj); *start = _START (obj); g_sequence_sort_changed (iters->iter_start, (GCompareDataFunc) compare_uint64, NULL); timeline_update_duration (timeline); } static void _destroy_auto_transition_cb (GESAutoTransition * auto_transition, GESTimeline * timeline) { GESTimelinePrivate *priv = timeline->priv; GESClip *transition = auto_transition->transition_clip; GESLayer *layer = ges_clip_get_layer (transition); ges_layer_remove_clip (layer, transition); g_signal_handlers_disconnect_by_func (auto_transition, _destroy_auto_transition_cb, timeline); if (!g_hash_table_remove (priv->auto_transitions, auto_transition->key)) GST_WARNING_OBJECT (timeline, "Could not remove auto_transition %" GST_PTR_FORMAT, auto_transition->key); } static GESAutoTransition * create_transition (GESTimeline * timeline, GESTrackElement * previous, GESTrackElement * next, GESClip * transition, GESLayer * layer, guint64 start, guint64 duration) { GESAsset *asset; GESAutoTransition *auto_transition; if (transition == NULL) { /* TODO make it possible to specify a Transition asset in the API */ asset = ges_asset_request (GES_TYPE_TRANSITION_CLIP, "crossfade", NULL); transition = ges_layer_add_asset (layer, asset, start, 0, duration, ges_track_element_get_track_type (next)); } else { GST_DEBUG_OBJECT (timeline, "Reusing already existing transition: %" GST_PTR_FORMAT, transition); } /* We know there is only 1 TrackElement */ auto_transition = ges_auto_transition_new (GES_CONTAINER_CHILDREN (transition)->data, previous, next); g_signal_connect (auto_transition, "destroy-me", G_CALLBACK (_destroy_auto_transition_cb), timeline); g_hash_table_insert (timeline->priv->auto_transitions, auto_transition->key, auto_transition); return auto_transition; } typedef GESAutoTransition *(*GetAutoTransitionFunc) (GESTimeline * timeline, GESLayer * layer, GESTrack * track, GESTrackElement * previous, GESTrackElement * next, GstClockTime transition_duration); static GESAutoTransition * _find_transition_from_auto_transitions (GESTimeline * timeline, GESLayer * layer, GESTrack * track, GESTrackElement * prev, GESTrackElement * next, GstClockTime transition_duration) { GESAutoTransition *auto_transition; gchar *key = g_strdup_printf ("%p%p", prev, next); auto_transition = g_hash_table_lookup (timeline->priv->auto_transitions, key); g_free (key); return auto_transition; } static GESAutoTransition * _create_auto_transition_from_transitions (GESTimeline * timeline, GESLayer * layer, GESTrack * track, GESTrackElement * prev, GESTrackElement * next, GstClockTime transition_duration) { GSequenceIter *tmp_iter; GSequence *by_layer_sequence; GESTimelinePrivate *priv = timeline->priv; GESAutoTransition *auto_transition = _find_transition_from_auto_transitions (timeline, layer, track, prev, next, transition_duration); if (auto_transition) return auto_transition; /* Try to find a transition that perfectly fits with the one that * should be added at that place * optimize: Use g_sequence_search instead of going over all the * sequence */ by_layer_sequence = g_hash_table_lookup (priv->by_layer, layer); for (tmp_iter = g_sequence_get_begin_iter (by_layer_sequence); tmp_iter && !g_sequence_iter_is_end (tmp_iter); tmp_iter = g_sequence_iter_next (tmp_iter)) { GESTrackElement *maybe_transition = g_sequence_get (tmp_iter); if (ges_track_element_get_track (maybe_transition) != track) continue; if (_START (maybe_transition) > _START (next)) break; else if (_START (maybe_transition) != _START (next) || _DURATION (maybe_transition) != transition_duration) continue; else if (GES_IS_TRANSITION (maybe_transition)) /* Use that transition */ /* TODO We should make sure that the transition contains only * TrackElement-s in @track and if it is not the case properly unlink the * object to use it */ return create_transition (timeline, prev, next, GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (maybe_transition)), layer, _START (next), transition_duration); } return NULL; } /* Create all transition that do not exist on @layer. * @get_auto_transition is called to check if a particular transition exists * if @ track is specified, we will create the transitions only for that particular * track */ static void _create_transitions_on_layer (GESTimeline * timeline, GESLayer * layer, GESTrack * track, GESTrackElement * initiating_obj, GetAutoTransitionFunc get_auto_transition) { guint32 layer_prio; GSequenceIter *iter; GESAutoTransition *transition; GESTrack *ctrack = track; GList *entered = NULL; /* List of TrackElement for wich we walk through the * "start" but not the "end" in the starts_ends list */ GESTimelinePrivate *priv = timeline->priv; if (!layer || !ges_layer_get_auto_transition (layer)) return; layer_prio = ges_layer_get_priority (layer); for (iter = g_sequence_get_begin_iter (priv->starts_ends); iter && !g_sequence_iter_is_end (iter); iter = g_sequence_iter_next (iter)) { GList *tmp; guint *start_or_end = g_sequence_get (iter); GESTrackElement *next = g_hash_table_lookup (timeline->priv->by_object, start_or_end); /* Only object that are in that layer and track */ if (_ges_track_element_get_layer_priority (next) != layer_prio || (track && track != ges_track_element_get_track (next))) continue; if (track == NULL) ctrack = ges_track_element_get_track (next); if (start_or_end == g_hash_table_lookup (priv->by_end, next)) { if (initiating_obj == next) { /* We passed the objects that initiated the research * we are now done */ g_list_free (entered); return; } entered = g_list_remove (entered, next); continue; } for (tmp = entered; tmp; tmp = tmp->next) { gint64 transition_duration; GESTrackElement *prev = tmp->data; if (ctrack != ges_track_element_get_track (prev)) continue; transition_duration = (_START (prev) + _DURATION (prev)) - _START (next); if (transition_duration > 0 && transition_duration < _DURATION (prev) && transition_duration < _DURATION (next)) { transition = get_auto_transition (timeline, layer, ctrack, prev, next, transition_duration); if (!transition) transition = create_transition (timeline, prev, next, NULL, layer, _START (next), transition_duration); } } /* And add that object to the entered list so that it we can possibly set * a transition on its end edge */ entered = g_list_append (entered, next); } } /* @track_element must be a GESSource */ static void create_transitions (GESTimeline * timeline, GESTrackElement * track_element) { GESTrack *track; GList *layer_node; GESTimelinePrivate *priv = timeline->priv; if (!priv->needs_transitions_update) return; GST_DEBUG_OBJECT (timeline, "Creating transitions around %p", track_element); track = ges_track_element_get_track (track_element); layer_node = g_list_find_custom (timeline->layers, GINT_TO_POINTER (_ges_track_element_get_layer_priority (track_element)), (GCompareFunc) find_layer_by_prio); _create_transitions_on_layer (timeline, layer_node ? layer_node->data : NULL, track, track_element, _find_transition_from_auto_transitions); GST_DEBUG_OBJECT (timeline, "Done updating transitions"); } /* Timeline edition functions */ static inline void init_movecontext (MoveContext * mv_ctx, gboolean first_init) { if (G_UNLIKELY (first_init)) mv_ctx->moving_clips = g_hash_table_new (g_direct_hash, g_direct_equal); mv_ctx->moving_trackelements = NULL; 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_trackelements); g_hash_table_remove_all (mv_ctx->moving_clips); init_movecontext (mv_ctx, FALSE); } static void stop_tracking_track_element (GESTimeline * timeline, GESTrackElement * trackelement) { guint64 *start, *end; TrackObjIters *iters; GESTimelinePrivate *priv = timeline->priv; iters = g_hash_table_lookup (priv->obj_iters, trackelement); if (G_LIKELY (iters->iter_by_layer)) { g_sequence_remove (iters->iter_by_layer); } else { GST_WARNING_OBJECT (timeline, "TrackElement %p was in no layer", trackelement); } if (GES_IS_SOURCE (trackelement)) { start = g_hash_table_lookup (priv->by_start, trackelement); end = g_hash_table_lookup (priv->by_end, trackelement); g_hash_table_remove (priv->by_start, trackelement); g_hash_table_remove (priv->by_end, trackelement); 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); timeline_update_duration (timeline); } g_hash_table_remove (priv->obj_iters, trackelement); } static void start_tracking_track_element (GESTimeline * timeline, GESTrackElement * trackelement) { guint64 *pstart, *pend; GSequence *by_layer_sequence; TrackObjIters *iters; GESTimelinePrivate *priv = timeline->priv; guint layer_prio = _ges_track_element_get_layer_priority (trackelement); GList *layer_node = g_list_find_custom (timeline->layers, GINT_TO_POINTER (layer_prio), (GCompareFunc) find_layer_by_prio); GESLayer *layer = layer_node ? layer_node->data : NULL; iters = g_slice_new0 (TrackObjIters); /* We add all TrackElement to obj_iters as we always follow them * in the by_layer Sequences */ g_hash_table_insert (priv->obj_iters, trackelement, iters); /* Track all objects by layer */ if (G_UNLIKELY (layer == NULL)) { /* We handle the case where we have TrackElement that are in no layer by not * tracking them * * FIXME: Check if we should rather try to track them in some sort of * dummy layer, or even refuse TrackElements to be added in Tracks if * they land in no layer the timeline controls. */ GST_ERROR_OBJECT (timeline, "Adding a TrackElement that lands in no layer " "we are controlling"); } else { by_layer_sequence = g_hash_table_lookup (priv->by_layer, layer); iters->iter_by_layer = g_sequence_insert_sorted (by_layer_sequence, trackelement, (GCompareDataFunc) element_start_compare, NULL); iters->layer = layer; } if (GES_IS_SOURCE (trackelement)) { /* Track only sources for timeline edition and snapping */ pstart = g_malloc (sizeof (guint64)); pend = g_malloc (sizeof (guint64)); *pstart = _START (trackelement); *pend = *pstart + _DURATION (trackelement); 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, gst_object_ref (trackelement), (GCompareDataFunc) element_start_compare, NULL); iters->trackelement = trackelement; g_hash_table_insert (priv->by_start, trackelement, pstart); g_hash_table_insert (priv->by_object, pstart, trackelement); g_hash_table_insert (priv->by_end, trackelement, pend); g_hash_table_insert (priv->by_object, pend, trackelement); timeline->priv->movecontext.needs_move_ctx = TRUE; timeline_update_duration (timeline); create_transitions (timeline, trackelement); } } static inline void ges_timeline_emit_snappig (GESTimeline * timeline, GESTrackElement * obj1, guint64 * timecode) { GESTrackElement *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, GESTrackElement * trackelement, guint64 * current, guint64 timecode, gboolean emit) { GESTimelinePrivate *priv = timeline->priv; GSequenceIter *iter, *prev_iter, *nxt_iter; GESTrackElement *tmp_trackelement; GESClip *tmp_clip, *clip; 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; } } clip = GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (trackelement)); 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_trackelement = g_hash_table_lookup (timeline->priv->by_object, next_tc); tmp_clip = GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (tmp_trackelement)); off = timecode > *next_tc ? timecode - *next_tc : *next_tc - timecode; if (next_tc != current && off <= snap_distance && clip != tmp_clip) { 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_trackelement = g_hash_table_lookup (timeline->priv->by_object, prev_tc); tmp_clip = GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (tmp_trackelement)); off1 = timecode > *prev_tc ? timecode - *prev_tc : *prev_tc - timecode; if (prev_tc != current && off1 < off && off1 <= snap_distance && clip != tmp_clip) { 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, trackelement, ret); GST_DEBUG_OBJECT (timeline, "Snaping at %" GST_TIME_FORMAT, GST_TIME_ARGS (snap_time)); } return ret; } static inline GESClip * add_moving_clip (MoveContext * mv_ctx, GESTrackElement * trackelement) { GESClip *clip; GESLayer *layer; guint layer_prio; clip = GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (trackelement)); /* Avoid recalculating */ if (!g_hash_table_lookup (mv_ctx->moving_clips, clip)) { layer = ges_clip_get_layer (clip); if (layer == NULL) { GST_WARNING_OBJECT (clip, "Not in any layer, can not move" " between layers"); } else { g_hash_table_insert (mv_ctx->moving_clips, clip, clip); layer_prio = ges_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); gst_object_unref (layer); } } return clip; } static gboolean ges_move_context_set_objects (GESTimeline * timeline, GESTrackElement * obj, GESEdge edge) { TrackObjIters *iters; GESTrackElement *tmptrackelement; guint64 start, end, tmpend; GSequenceIter *iter, *trackelement_iter; MoveContext *mv_ctx = &timeline->priv->movecontext; iters = g_hash_table_lookup (timeline->priv->obj_iters, obj); trackelement_iter = iters->iter_obj; switch (edge) { case GES_EDGE_START: /* set it properly in the context of "trimming" */ mv_ctx->max_trim_pos = 0; start = _START (obj); if (g_sequence_iter_is_begin (trackelement_iter)) break; /* Look for the objects */ for (iter = g_sequence_iter_prev (trackelement_iter); iter && !g_sequence_iter_is_end (iter); iter = g_sequence_iter_prev (iter)) { tmptrackelement = GES_TRACK_ELEMENT (g_sequence_get (iter)); tmpend = _START (tmptrackelement) + _DURATION (tmptrackelement); if (tmpend <= start) { mv_ctx->max_trim_pos = MAX (mv_ctx->max_trim_pos, _START (tmptrackelement)); mv_ctx->moving_trackelements = g_list_prepend (mv_ctx->moving_trackelements, tmptrackelement); } 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 = _START (obj) + _DURATION (obj); mv_ctx->max_trim_pos = G_MAXUINT64; /* Look for folowing objects */ for (iter = g_sequence_iter_next (trackelement_iter); iter && !g_sequence_iter_is_end (iter); iter = g_sequence_iter_next (iter)) { tmptrackelement = GES_TRACK_ELEMENT (g_sequence_get (iter)); if (_START (tmptrackelement) >= end) { tmpend = _START (tmptrackelement) + _DURATION (tmptrackelement); mv_ctx->max_trim_pos = MIN (mv_ctx->max_trim_pos, tmpend); mv_ctx->moving_trackelements = g_list_prepend (mv_ctx->moving_trackelements, tmptrackelement); } } break; default: GST_DEBUG ("Edge type %d no supported", edge); return FALSE; } return TRUE; } static gboolean ges_timeline_set_moving_context (GESTimeline * timeline, GESTrackElement * obj, GESEditMode mode, GESEdge edge, GList * layers) { /* A TrackElement that could initiate movement for other object */ GESTrackElement *editor_trackelement = NULL; MoveContext *mv_ctx = &timeline->priv->movecontext; GESClip *clip = GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (obj)); /* Still in the same mv_ctx */ if ((mv_ctx->clip == clip && 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 (clip, "Changing context:\nold: obj: %p, mode: %d, edge: %d \n" "new: obj: %p, mode: %d, edge: %d ! Has changed %i", mv_ctx->clip, mv_ctx->mode, mv_ctx->edge, clip, mode, edge, mv_ctx->needs_move_ctx); clean_movecontext (mv_ctx); mv_ctx->edge = edge; mv_ctx->mode = mode; mv_ctx->clip = clip; mv_ctx->needs_move_ctx = FALSE; /* We try to find a Source inside the Clip so we can set the * moving context Else we just move the selected one only */ if (GES_IS_SOURCE (obj) == FALSE) { GList *tmp; for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) { if (GES_IS_SOURCE (tmp->data)) { editor_trackelement = tmp->data; break; } } } else { editor_trackelement = obj; } if (editor_trackelement) { switch (mode) { case GES_EDIT_MODE_RIPPLE: case GES_EDIT_MODE_ROLL: if (!(ges_move_context_set_objects (timeline, editor_trackelement, edge))) return FALSE; default: break; } add_moving_clip (&timeline->priv->movecontext, editor_trackelement); } else { /* We add the main object to the moving_clips set */ add_moving_clip (&timeline->priv->movecontext, obj); } return TRUE; } gboolean ges_timeline_trim_object_simple (GESTimeline * timeline, GESTimelineElement * element, GList * layers, GESEdge edge, guint64 position, gboolean snapping) { guint64 nstart, start, inpoint, duration, max_duration, *snapped, *cur; gboolean ret = TRUE; gint64 real_dur; GESTrackElement *track_element; /* We only work with GESSource-s */ if (GES_IS_SOURCE (element) == FALSE) return FALSE; track_element = GES_TRACK_ELEMENT (element); GST_DEBUG_OBJECT (track_element, "Trimming to %" GST_TIME_FORMAT " %s snaping, edge %i", GST_TIME_ARGS (position), snapping ? "Is" : "Not", edge); start = _START (track_element); g_object_get (track_element, "max-duration", &max_duration, NULL); switch (edge) { case GES_EDGE_START: inpoint = _INPOINT (track_element); duration = _DURATION (track_element); if (snapping) { cur = g_hash_table_lookup (timeline->priv->by_start, track_element); snapped = ges_timeline_snap_position (timeline, track_element, 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 - _INPOINT (track_element)); timeline->priv->needs_transitions_update = FALSE; _set_start0 (GES_TIMELINE_ELEMENT (track_element), nstart); _set_inpoint0 (GES_TIMELINE_ELEMENT (track_element), inpoint); timeline->priv->needs_transitions_update = TRUE; _set_duration0 (GES_TIMELINE_ELEMENT (track_element), duration); break; case GES_EDGE_END: { cur = g_hash_table_lookup (timeline->priv->by_end, track_element); snapped = ges_timeline_snap_position (timeline, track_element, cur, position, TRUE); if (snapped) position = *snapped; /* Calculate new values */ real_dur = position - start; duration = MAX (0, real_dur); duration = MIN (duration, max_duration - _INPOINT (track_element)); _set_duration0 (GES_TIMELINE_ELEMENT (track_element), duration); break; } default: GST_WARNING ("Can not trim with %i GESEdge", edge); return FALSE; } return ret; } gboolean timeline_ripple_object (GESTimeline * timeline, GESTrackElement * obj, GList * layers, GESEdge edge, guint64 position) { GList *tmp, *moved_clips = NULL; GESTrackElement *trackelement; GESClip *clip; 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"); /* We should be smart here to avoid recalculate transitions when possible */ 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 - _START (obj); for (tmp = mv_ctx->moving_trackelements; tmp; tmp = tmp->next) { trackelement = GES_TRACK_ELEMENT (tmp->data); new_start = _START (trackelement) + offset; clip = add_moving_clip (mv_ctx, trackelement); /* Make sure not to move 2 times the same Clip */ if (g_list_find (moved_clips, clip) == NULL) { _set_start0 (GES_TIMELINE_ELEMENT (trackelement), new_start); moved_clips = g_list_prepend (moved_clips, clip); } } g_list_free (moved_clips); _set_start0 (GES_TIMELINE_ELEMENT (obj), position); break; case GES_EDGE_END: timeline->priv->needs_transitions_update = FALSE; 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 = _DURATION (obj); _set_duration0 (GES_TIMELINE_ELEMENT (obj), position - _START (obj)); offset = _DURATION (obj) - duration; for (tmp = mv_ctx->moving_trackelements; tmp; tmp = tmp->next) { trackelement = GES_TRACK_ELEMENT (tmp->data); new_start = _START (trackelement) + offset; clip = add_moving_clip (mv_ctx, trackelement); /* Make sure not to move 2 times the same Clip */ if (g_list_find (moved_clips, clip) == NULL) { _set_start0 (GES_TIMELINE_ELEMENT (trackelement), new_start); moved_clips = g_list_prepend (moved_clips, clip); } } g_list_free (moved_clips); timeline->priv->needs_transitions_update = TRUE; 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, GESTrackElement * obj, GList * layers, GESEdge edge, guint64 position) { /* FIXME implement me! */ GST_FIXME_OBJECT (timeline, "Slide mode editing not implemented yet"); return FALSE; } gboolean timeline_trim_object (GESTimeline * timeline, GESTrackElement * 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, GES_TIMELINE_ELEMENT (object), layers, edge, position, TRUE); end: mv_ctx->ignore_needs_ctx = FALSE; return ret; } gboolean timeline_roll_object (GESTimeline * timeline, GESTrackElement * 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 = _START (obj); duration = _DURATION (obj); end = start + duration; timeline->priv->needs_transitions_update = FALSE; 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, GES_TIMELINE_ELEMENT (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 = _START (obj); /* Send back changes to the neighbourhood */ for (tmp = mv_ctx->moving_trackelements; tmp; tmp = tmp->next) { GESTimelineElement *tmpelement = GES_TIMELINE_ELEMENT (tmp->data); tmpstart = _START (tmpelement); tmpduration = _DURATION (tmpelement); 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, tmpelement, 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 = _START (obj) + _DURATION (obj); 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, GES_TIMELINE_ELEMENT (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 = _START (obj) + _DURATION (obj); /* Send back changes to the neighbourhood */ for (tmp = mv_ctx->moving_trackelements; tmp; tmp = tmp->next) { GESTimelineElement *tmpelement = GES_TIMELINE_ELEMENT (tmp->data); tmpstart = _START (tmpelement); tmpduration = _DURATION (tmpelement); 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, tmpelement, NULL, GES_EDGE_START, position, FALSE); } } break; default: GST_DEBUG ("Edge type %i not handled here", edge); break; } done: timeline->priv->needs_transitions_update = TRUE; mv_ctx->ignore_needs_ctx = FALSE; return ret; error: GST_DEBUG_OBJECT (obj, "Could not roll edge %d to %" GST_TIME_FORMAT, edge, GST_TIME_ARGS (position)); ret = FALSE; goto done; } gboolean timeline_move_object (GESTimeline * timeline, GESTrackElement * 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, GES_TIMELINE_ELEMENT (object), layers, edge, position); } gboolean ges_timeline_move_object_simple (GESTimeline * timeline, GESTimelineElement * element, GList * layers, GESEdge edge, guint64 position) { guint64 *snap_end, *snap_st, *cur, off1, off2, end; GESTrackElement *track_element; /* We only work with GESSource-s and we check that we are not already moving * element ourself*/ if (GES_IS_SOURCE (element) == FALSE || g_list_find (timeline->priv->movecontext.moving_trackelements, element)) return FALSE; track_element = GES_TRACK_ELEMENT (element); end = position + _DURATION (track_element); cur = g_hash_table_lookup (timeline->priv->by_end, track_element); 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, track_element, 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, track_element); snap_st = ges_timeline_snap_position (timeline, track_element, 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, track_element, snap_end); } else if (snap_st) { position = position + *snap_st - position; ges_timeline_emit_snappig (timeline, track_element, snap_st); } else ges_timeline_emit_snappig (timeline, track_element, NULL); _set_start0 (GES_TIMELINE_ELEMENT (track_element), 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; GESClip *key, *value; GESLayer *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_clips), offset); g_hash_table_iter_init (&iter, mv_ctx->moving_clips); while (g_hash_table_iter_next (&iter, (gpointer *) & key, (gpointer *) & value)) { layer = ges_clip_get_layer (value); prio = ges_layer_get_priority (layer); /* We know that the layer exists as we created it */ new_layer = GES_LAYER (g_list_nth_data (timeline->layers, prio + offset)); if (new_layer == NULL) { do { new_layer = ges_timeline_append_layer (timeline); } while (ges_layer_get_priority (new_layer) < prio + offset); } ret &= ges_clip_move_to_layer (key, new_layer); gst_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 GPtrArray * select_tracks_for_object_default (GESTimeline * timeline, GESClip * clip, GESTrackElement * tr_object, gpointer user_data) { GPtrArray *result; GList *tmp; result = g_ptr_array_new (); for (tmp = timeline->tracks; tmp; tmp = tmp->next) { GESTrack *track = GES_TRACK (tmp->data); if ((track->type & ges_track_element_get_track_type (tr_object))) { gst_object_ref (track); g_ptr_array_add (result, track); } } return result; } static void add_object_to_tracks (GESTimeline * timeline, GESClip * clip, GESTrack * track) { gint i; GList *tmp; GESTrackType types, visited_type = GES_TRACK_TYPE_UNKNOWN; GST_DEBUG_OBJECT (timeline, "Creating %" GST_PTR_FORMAT " trackelements and adding them to our tracks", clip); types = ges_clip_get_supported_formats (clip); if (track) { if ((types & track->type) == 0) return; types = track->type; } for (i = 0, tmp = timeline->tracks; tmp; tmp = tmp->next, i++) { GESTrack *track = GES_TRACK (tmp->data); if (((track->type & types) == 0 || (track->type & visited_type))) continue; ges_clip_create_track_elements (clip, track->type); } } static void layer_auto_transition_changed_cb (GESLayer * layer, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { _create_transitions_on_layer (timeline, layer, NULL, NULL, _create_auto_transition_from_transitions); } static void clip_track_element_added_cb (GESClip * clip, GESTrackElement * track_element, GESTimeline * timeline) { guint i; GESTrack *track; GPtrArray *tracks = NULL; if (timeline->priv->ignore_track_element_added == clip) { GST_DEBUG_OBJECT (timeline, "Ignoring element added (%" GST_PTR_FORMAT " in %" GST_PTR_FORMAT, track_element, clip); return; } if (ges_track_element_get_track (track_element)) { GST_WARNING_OBJECT (track_element, "Already in a track"); return; } g_signal_emit (G_OBJECT (timeline), ges_timeline_signals[SELECT_TRACKS_FOR_OBJECT], 0, clip, track_element, &tracks); if (!tracks || tracks->len == 0) { GST_WARNING_OBJECT (timeline, "Got no Track to add %p (type %s), removing" " from clip", track_element, ges_track_type_name (ges_track_element_get_track_type (track_element))); if (tracks) g_ptr_array_unref (tracks); ges_container_remove (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (track_element)); return; } /* We add the current element to the first track */ track = g_ptr_array_index (tracks, 0); if (!ges_track_add_element (track, track_element)) { GST_WARNING_OBJECT (clip, "Failed to add track element to track"); ges_container_remove (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (track_element)); gst_object_unref (track_element); return; } gst_object_unref (track); /* And create copies to add to other tracks */ timeline->priv->ignore_track_element_added = clip; for (i = 1; i < tracks->len; i++) { GESTrack *track; GESTrackElement *track_element_copy; track = g_ptr_array_index (tracks, i); track_element_copy = GES_TRACK_ELEMENT (ges_timeline_element_copy (GES_TIMELINE_ELEMENT (track_element), TRUE)); GST_LOG_OBJECT (timeline, "Trying to add %p to track %p", track_element_copy, track); if (!ges_container_add (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (track_element_copy))) { GST_WARNING_OBJECT (clip, "Failed to add track element to clip"); gst_object_unref (track_element_copy); return; } if (!ges_track_add_element (track, track_element_copy)) { GST_WARNING_OBJECT (clip, "Failed to add track element to track"); ges_container_remove (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (track_element_copy)); gst_object_unref (track_element_copy); return; } gst_object_unref (track); } timeline->priv->ignore_track_element_added = NULL; } static void clip_track_element_removed_cb (GESClip * clip, GESTrackElement * track_element, GESTimeline * timeline) { GESTrack *track = ges_track_element_get_track (track_element); if (track) ges_track_remove_element (track, track_element); } static void layer_object_added_cb (GESLayer * layer, GESClip * clip, GESTimeline * timeline) { /* We make sure not to be connected twice */ g_signal_handlers_disconnect_by_func (clip, clip_track_element_added_cb, timeline); g_signal_handlers_disconnect_by_func (clip, clip_track_element_removed_cb, timeline); /* And we connect to the object */ g_signal_connect (clip, "child-added", G_CALLBACK (clip_track_element_added_cb), timeline); g_signal_connect (clip, "child-removed", G_CALLBACK (clip_track_element_removed_cb), timeline); if (ges_clip_is_moving_from_layer (clip)) { GST_DEBUG ("Clip %p moving from one layer to another, not creating " "TrackElement", clip); timeline->priv->movecontext.needs_move_ctx = TRUE; _create_transitions_on_layer (timeline, layer, NULL, NULL, _find_transition_from_auto_transitions); return; } add_object_to_tracks (timeline, clip, NULL); GST_DEBUG ("Done"); } static void layer_priority_changed_cb (GESLayer * layer, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { timeline->layers = g_list_sort (timeline->layers, (GCompareFunc) sort_layers); } static void layer_object_removed_cb (GESLayer * layer, GESClip * clip, GESTimeline * timeline) { GList *trackelements, *tmp; if (ges_clip_is_moving_from_layer (clip)) { GST_DEBUG ("Clip %p is moving from a layer to another, not doing" " anything on it", clip); return; } GST_DEBUG ("Clip %p removed from layer %p", clip, layer); /* Go over the clip's track element and figure out which one belongs to * the list of tracks we control */ trackelements = ges_container_get_children (GES_CONTAINER (clip)); for (tmp = trackelements; tmp; tmp = tmp->next) { GESTrackElement *track_element = (GESTrackElement *) tmp->data; GESTrack *track = ges_track_element_get_track (track_element); GST_DEBUG_OBJECT (timeline, "Trying to remove TrackElement %p", track_element); /* FIXME Check if we should actually check that we control the * track in the new management of TrackElement context */ LOCK_DYN (timeline); if (G_LIKELY (g_list_find_custom (timeline->priv->priv_tracks, track, (GCompareFunc) custom_find_track) || track == NULL)) { GST_DEBUG ("Belongs to one of the tracks we control"); ges_container_remove (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (track_element)); } UNLOCK_DYN (timeline); } g_signal_handlers_disconnect_by_func (clip, clip_track_element_added_cb, timeline); g_signal_handlers_disconnect_by_func (clip, clip_track_element_removed_cb, timeline); g_list_free_full (trackelements, gst_object_unref); GST_DEBUG ("Done"); } static void trackelement_start_changed_cb (GESTrackElement * child, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { GESTimelinePrivate *priv = timeline->priv; TrackObjIters *iters = g_hash_table_lookup (priv->obj_iters, child); if (G_LIKELY (iters->iter_by_layer)) g_sequence_sort_changed (iters->iter_by_layer, (GCompareDataFunc) element_start_compare, NULL); if (GES_IS_SOURCE (child)) { sort_track_elements (timeline, iters); sort_starts_ends_start (timeline, iters); sort_starts_ends_end (timeline, iters); /* If the timeline is set to snap objects together, we * are sure that all movement of TrackElement-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; create_transitions (timeline, child); } } static void trackelement_priority_changed_cb (GESTrackElement * child, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { GESTimelinePrivate *priv = timeline->priv; GList *layer_node = g_list_find_custom (timeline->layers, GINT_TO_POINTER (_ges_track_element_get_layer_priority (child)), (GCompareFunc) find_layer_by_prio); GESLayer *layer = layer_node ? layer_node->data : NULL; TrackObjIters *iters = g_hash_table_lookup (priv->obj_iters, child); if (G_UNLIKELY (layer == NULL)) { GST_ERROR_OBJECT (timeline, "Changing a TrackElement prio, which would not " "land in no layer we are controlling"); g_sequence_remove (iters->iter_by_layer); iters->iter_by_layer = NULL; iters->layer = NULL; } else { /* If it moves from layer, properly change it */ if (layer != iters->layer) { GSequence *by_layer_sequence = g_hash_table_lookup (priv->by_layer, layer); GST_DEBUG_OBJECT (child, "Moved from layer %" GST_PTR_FORMAT "(prio %d) to" " %" GST_PTR_FORMAT " (prio %d)", layer, ges_layer_get_priority (layer), iters->layer, ges_layer_get_priority (iters->layer)); g_sequence_remove (iters->iter_by_layer); iters->iter_by_layer = g_sequence_insert_sorted (by_layer_sequence, child, (GCompareDataFunc) element_start_compare, NULL); iters->layer = layer; } else { g_sequence_sort_changed (iters->iter_by_layer, (GCompareDataFunc) element_start_compare, NULL); } } if (GES_IS_SOURCE (child)) sort_track_elements (timeline, iters); } static void trackelement_duration_changed_cb (GESTrackElement * child, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { GESTimelinePrivate *priv = timeline->priv; TrackObjIters *iters = g_hash_table_lookup (priv->obj_iters, child); if (GES_IS_SOURCE (child)) { sort_starts_ends_end (timeline, iters); /* If the timeline is set to snap objects together, we * are sure that all movement of TrackElement-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; } create_transitions (timeline, child); } } static void track_element_added_cb (GESTrack * track, GESTrackElement * track_element, GESTimeline * timeline) { /* Auto transition should be updated before we receive the signal */ g_signal_connect_after (GES_TRACK_ELEMENT (track_element), "notify::start", G_CALLBACK (trackelement_start_changed_cb), timeline); g_signal_connect_after (GES_TRACK_ELEMENT (track_element), "notify::duration", G_CALLBACK (trackelement_duration_changed_cb), timeline); g_signal_connect_after (GES_TRACK_ELEMENT (track_element), "notify::priority", G_CALLBACK (trackelement_priority_changed_cb), timeline); start_tracking_track_element (timeline, track_element); } static void track_element_removed_cb (GESTrack * track, GESTrackElement * track_element, GESTimeline * timeline) { if (GES_IS_SOURCE (track_element)) { /* Make sure to reinitialise the moving context next time */ timeline->priv->movecontext.needs_move_ctx = TRUE; } /* Disconnect all signal handlers */ g_signal_handlers_disconnect_by_func (track_element, trackelement_start_changed_cb, NULL); g_signal_handlers_disconnect_by_func (track_element, trackelement_duration_changed_cb, NULL); g_signal_handlers_disconnect_by_func (track_element, trackelement_priority_changed_cb, NULL); stop_tracking_track_element (timeline, track_element); } 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 */ LOCK_DYN (tr_priv->timeline); GST_OBJECT_LOCK (track); tr_priv->pad = pad; no_more = TRUE; for (tmp = tr_priv->timeline->priv->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)); } UNLOCK_DYN (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 * @error: (out) (allow-none): An error to be set in case something wrong happens or %NULL * * 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; GESProject *project = ges_project_new (uri); ret = GES_TIMELINE (ges_asset_extract (GES_ASSET (project), error)); gst_object_unref (project); return ret; } /** * ges_timeline_load_from_uri: * @timeline: an empty #GESTimeline into which to load the formatter * @uri: The URI to load from * @error: (out) (allow-none): An error to be set in case something wrong happens or %NULL * * 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) { GESProject *project; gboolean ret = FALSE; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail ((ges_extractable_get_asset (GES_EXTRACTABLE (timeline)) == NULL), FALSE); project = ges_project_new (uri); ret = ges_project_load (project, timeline, error); gst_object_unref (project); return ret; } /** * ges_timeline_save_to_uri: * @timeline: a #GESTimeline * @uri: The location to save to * @formatter_asset: (allow-none): The formatter asset to use or %NULL. If %NULL, * will try to save in the same format as the one from which the timeline as been loaded * or default to the formatter with highest rank * @overwrite: %TRUE to overwrite file if it exists * @error: (out) (allow-none): An error to be set in case something wrong happens or %NULL * * 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, GESAsset * formatter_asset, gboolean overwrite, GError ** error) { GESProject *project; gboolean ret, created_proj = FALSE; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); project = GES_PROJECT (ges_extractable_get_asset (GES_EXTRACTABLE (timeline))); if (project == NULL) { project = ges_project_new (NULL); created_proj = TRUE; } ret = ges_project_save (project, timeline, uri, formatter_asset, overwrite, error); if (created_proj) gst_object_unref (project); return ret; } /** * ges_timeline_append_layer: * @timeline: a #GESTimeline * * Append a newly created #GESLayer to @timeline * Note that you do not own any reference to the returned layer. * * Returns: (transfer none): The newly created #GESLayer, or the last (empty) * #GESLayer of @timeline. */ GESLayer * ges_timeline_append_layer (GESTimeline * timeline) { guint32 priority; GESLayer *layer; layer = ges_layer_new (); priority = g_list_length (timeline->layers); ges_layer_set_priority (layer, priority); ges_timeline_add_layer (timeline, layer); return layer; } /** * ges_timeline_add_layer: * @timeline: a #GESTimeline * @layer: the #GESLayer 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, GESLayer * layer) { gboolean auto_transition; GList *objects, *tmp; 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 (timeline->layers, (gconstpointer) layer))) { GST_WARNING ("Layer is already controlled by this timeline"); return FALSE; } auto_transition = ges_layer_get_auto_transition (layer); /* If the user doesn't explicitely set layer auto_transition, then set our */ if (!auto_transition) { auto_transition = ges_timeline_get_auto_transition (timeline); ges_layer_set_auto_transition (layer, auto_transition); } gst_object_ref_sink (layer); timeline->layers = g_list_insert_sorted (timeline->layers, layer, (GCompareFunc) sort_layers); /* Inform the layer that it belongs to a new timeline */ ges_layer_set_timeline (layer, timeline); g_hash_table_insert (timeline->priv->by_layer, layer, g_sequence_new (NULL)); /* Connect to 'clip-added'/'clip-removed' signal from the new layer */ g_signal_connect (layer, "clip-added", G_CALLBACK (layer_object_added_cb), timeline); g_signal_connect (layer, "clip-removed", G_CALLBACK (layer_object_removed_cb), timeline); g_signal_connect (layer, "notify::priority", G_CALLBACK (layer_priority_changed_cb), timeline); g_signal_connect (layer, "notify::auto-transition", G_CALLBACK (layer_auto_transition_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 clips to the timeline */ objects = ges_layer_get_clips (layer); for (tmp = objects; tmp; tmp = tmp->next) { layer_object_added_cb (layer, tmp->data, timeline); gst_object_unref (tmp->data); tmp->data = NULL; } g_list_free (objects); return TRUE; } /** * ges_timeline_remove_layer: * @timeline: a #GESTimeline * @layer: the #GESLayer 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, GESLayer * layer) { GList *layer_objects, *tmp; GST_DEBUG ("timeline:%p, layer:%p", timeline, layer); if (G_UNLIKELY (!g_list_find (timeline->layers, layer))) { GST_WARNING ("Layer doesn't belong to this timeline"); return FALSE; } /* remove objects from any private data structures */ layer_objects = ges_layer_get_clips (layer); for (tmp = layer_objects; tmp; tmp = tmp->next) { layer_object_removed_cb (layer, GES_CLIP (tmp->data), timeline); gst_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); g_signal_handlers_disconnect_by_func (layer, layer_priority_changed_cb, timeline); g_signal_handlers_disconnect_by_func (layer, layer_auto_transition_changed_cb, timeline); g_hash_table_remove (timeline->priv->by_layer, layer); timeline->layers = g_list_remove (timeline->layers, layer); ges_layer_set_timeline (layer, NULL); g_signal_emit (timeline, ges_timeline_signals[LAYER_REMOVED], 0, layer); gst_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 elements for clips which have already been * added to existing layers. */ gboolean ges_timeline_add_track (GESTimeline * timeline, GESTrack * track) { TrackPrivate *tr_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 (timeline->tracks, (gconstpointer) 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 */ LOCK_DYN (timeline); timeline->priv->priv_tracks = g_list_append (timeline->priv->priv_tracks, tr_priv); UNLOCK_DYN (timeline); timeline->tracks = g_list_append (timeline->tracks, track); /* 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 clip has the opportunity to create a * track element for this track*/ /* We connect to the object for the timeline editing mode management */ g_signal_connect (G_OBJECT (track), "track-element-added", G_CALLBACK (track_element_added_cb), timeline); g_signal_connect (G_OBJECT (track), "track-element-removed", G_CALLBACK (track_element_removed_cb), timeline); for (tmp = timeline->layers; tmp; tmp = tmp->next) { GList *objects, *obj; objects = ges_layer_get_clips (tmp->data); for (obj = objects; obj; obj = obj->next) { GESClip *clip = obj->data; add_object_to_tracks (timeline, clip, track); gst_object_unref (clip); } g_list_free (objects); } /* FIXME Check if we should rollback if we can't sync state */ gst_element_sync_state_with_parent (GST_ELEMENT (track)); 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 elements associated with this layer. currenly this * will not happen if you remove the track before removing *all* * clips which have a track element in this track. */ gboolean ges_timeline_remove_track (GESTimeline * timeline, GESTrack * track) { GList *tmp; TrackPrivate *tr_priv; GESTimelinePrivate *priv; g_return_val_if_fail (GES_IS_TRACK (track), FALSE); g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); GST_DEBUG ("timeline:%p, track:%p", timeline, track); priv = timeline->priv; LOCK_DYN (timeline); if (G_UNLIKELY (!(tmp = g_list_find_custom (priv->priv_tracks, track, (GCompareFunc) custom_find_track)))) { GST_WARNING ("Track doesn't belong to this timeline"); UNLOCK_DYN (timeline); return FALSE; } tr_priv = tmp->data; priv->priv_tracks = g_list_remove (priv->priv_tracks, tr_priv); UNLOCK_DYN (timeline); timeline->tracks = g_list_remove (timeline->tracks, track); 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_element_added_cb, timeline); g_signal_handlers_disconnect_by_func (track, track_element_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; LOCK_DYN (timeline); for (tmp = timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) { TrackPrivate *tr_priv = (TrackPrivate *) tmp->data; if (pad == tr_priv->ghostpad) { UNLOCK_DYN (timeline); return tr_priv->track; } } UNLOCK_DYN (timeline); 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) { g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); return g_list_copy_deep (timeline->tracks, (GCopyFunc) gst_object_ref, NULL); } /** * ges_timeline_get_layers: * @timeline: a #GESTimeline * * Get the list of #GESLayer present in the Timeline. * * Returns: (transfer full) (element-type GESLayer): the list of * #GESLayer 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->layers; tmp; tmp = g_list_next (tmp)) { res = g_list_insert_sorted (res, gst_object_ref (tmp->data), (GCompareFunc) sort_layers); } return res; } /** * ges_timeline_commit: * @timeline: a #GESTimeline * * Commits all the pending changes of the clips contained in the * @timeline. * * When timing changes happen in a timeline, the changes are not * directly done inside GNL. This method needs to be called so any changes * on a clip contained in the timeline actually happen at the media * processing level. * * Returns: %TRUE if something as been commited %FALSE if nothing needed * to be commited */ gboolean ges_timeline_commit (GESTimeline * timeline) { GList *tmp; gboolean res = TRUE; GST_DEBUG_OBJECT (timeline, "commiting changes"); for (tmp = timeline->tracks; tmp; tmp = tmp->next) { if (!ges_track_commit (GES_TRACK (tmp->data))) res = FALSE; } /* Make sure we reset the context */ timeline->priv->movecontext.needs_move_ctx = TRUE; for (tmp = timeline->layers; tmp; tmp = tmp->next) { _create_transitions_on_layer (timeline, GES_LAYER (tmp->data), NULL, NULL, _find_transition_from_auto_transitions); } return res; } /** * 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; } /** * ges_timeline_get_auto_transition: * @timeline: a #GESTimeline * * Gets whether transitions are automatically added when objects * overlap or not. * * Returns: %TRUE if transitions are automatically added, else %FALSE. */ gboolean ges_timeline_get_auto_transition (GESTimeline * timeline) { g_return_val_if_fail (GES_IS_TIMELINE (timeline), 0); return timeline->priv->auto_transition; } /** * ges_timeline_set_auto_transition: * @timeline: a #GESLayer * @auto_transition: whether the auto_transition is active * * Sets the layer to the given @auto_transition. See the documentation of the * property auto_transition for more information. */ void ges_timeline_set_auto_transition (GESTimeline * timeline, gboolean auto_transition) { GList *layers; GESLayer *layer; g_return_if_fail (GES_IS_TIMELINE (timeline)); timeline->priv->auto_transition = auto_transition; g_object_notify (G_OBJECT (timeline), "auto-transition"); layers = timeline->layers; for (; layers; layers = layers->next) { layer = layers->data; ges_layer_set_auto_transition (layer, auto_transition); } }