/* GStreamer Editing Services * Copyright (C) 2009 Edward Hervey * 2009 Nokia Corporation * 2012 Thibault Saunier * 2012 Collabora Ltd. * Author: Sebastian Dröge * 2019 Igalia S.L * Author: Thibault Saunier * * 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:gestimeline * @title: GESTimeline * @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 types are 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "ges-internal.h" #include "ges-project.h" #include "ges-container.h" #include "ges-timeline.h" #include "ges-timeline-tree.h" #include "ges-track.h" #include "ges-layer.h" #include "ges-auto-transition.h" #include "ges.h" static GPtrArray *select_tracks_for_object_default (GESTimeline * timeline, GESClip * clip, GESTrackElement * tr_obj, gpointer user_data); static void ges_extractable_interface_init (GESExtractableInterface * iface); static void ges_meta_container_interface_init (GESMetaContainerInterface * iface); 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_LOG_OBJECT (timeline, "Getting dynamic lock from %p", \ g_thread_self()); \ g_rec_mutex_lock (DYN_LOCK (timeline)); \ GST_LOG_OBJECT (timeline, "Got Dynamic lock from %p", \ g_thread_self()); \ } G_STMT_END #define UNLOCK_DYN(timeline) G_STMT_START { \ GST_LOG_OBJECT (timeline, "Unlocking dynamic lock from %p", \ g_thread_self()); \ g_rec_mutex_unlock (DYN_LOCK (timeline)); \ GST_LOG_OBJECT (timeline, "Unlocked Dynamic lock from %p", \ g_thread_self()); \ } G_STMT_END #define CHECK_THREAD(timeline) g_assert(timeline->priv->valid_thread == g_thread_self()) struct _GESTimelinePrivate { GNode *tree; /* 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; GRecMutex dyn_mutex; GList *priv_tracks; /* Avoid sorting layers when we are actually resyncing them ourself */ gboolean resyncing_layers; GList *auto_transitions; /* Last snapping properties */ GstClockTime last_snap_ts; GESTrackElement *last_snaped1; GESTrackElement *last_snaped2; /* 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; GList *groups; guint stream_start_group_id; GHashTable *all_elements; /* With GST_OBJECT_LOCK */ guint expected_async_done; /* With GST_OBJECT_LOCK */ guint expected_commited; /* For ges_timeline_commit_sync */ GMutex commited_lock; GCond commited_cond; GThread *valid_thread; }; /* private structure to contain our track-related information */ typedef struct { GESTimeline *timeline; GESTrack *track; GstPad *pad; /* Pad from the track */ GstPad *ghostpad; gulong probe_id; } 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, GROUP_ADDED, GROUP_REMOVED, SNAPING_STARTED, SNAPING_ENDED, SELECT_TRACKS_FOR_OBJECT, COMMITED, LAST_SIGNAL }; G_DEFINE_TYPE_WITH_CODE (GESTimeline, ges_timeline, GST_TYPE_BIN, G_ADD_PRIVATE (GESTimeline) G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init) G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER, ges_meta_container_interface_init)); 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; GList *tmp, *groups; 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 nleobjects have been destroyed. */ while (tl->tracks) ges_timeline_remove_track (GES_TIMELINE (object), tl->tracks->data); groups = g_list_copy (priv->groups); for (tmp = groups; tmp; tmp = tmp->next) { GList *elems = ges_container_ungroup (tmp->data, FALSE); g_list_free_full (elems, gst_object_unref); } g_list_free (priv->groups); g_list_free (groups); g_list_free_full (priv->auto_transitions, gst_object_unref); g_hash_table_unref (priv->all_elements); G_OBJECT_CLASS (ges_timeline_parent_class)->dispose (object); } static void ges_timeline_finalize (GObject * object) { GESTimeline *tl = GES_TIMELINE (object); g_rec_mutex_clear (&tl->priv->dyn_mutex); g_node_destroy (tl->priv->tree); G_OBJECT_CLASS (ges_timeline_parent_class)->finalize (object); } static void ges_timeline_handle_message (GstBin * bin, GstMessage * message) { GESTimeline *timeline = GES_TIMELINE (bin); if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ELEMENT) { GstMessage *amessage = NULL; const GstStructure *mstructure = gst_message_get_structure (message); if (gst_structure_has_name (mstructure, "NleCompositionStartUpdate")) { if (g_strcmp0 (gst_structure_get_string (mstructure, "reason"), "Seek")) { GST_INFO_OBJECT (timeline, "A composition is starting an update because of %s" " not considering async", gst_structure_get_string (mstructure, "reason")); goto forward; } GST_OBJECT_LOCK (timeline); if (timeline->priv->expected_async_done == 0) { amessage = gst_message_new_async_start (GST_OBJECT_CAST (bin)); timeline->priv->expected_async_done = g_list_length (timeline->tracks); GST_INFO_OBJECT (timeline, "Posting ASYNC_START %s", gst_structure_get_string (mstructure, "reason")); } GST_OBJECT_UNLOCK (timeline); } else if (gst_structure_has_name (mstructure, "NleCompositionUpdateDone")) { if (g_strcmp0 (gst_structure_get_string (mstructure, "reason"), "Seek")) { GST_INFO_OBJECT (timeline, "A composition is done updating because of %s" " not considering async", gst_structure_get_string (mstructure, "reason")); goto forward; } GST_OBJECT_LOCK (timeline); timeline->priv->expected_async_done -= 1; if (timeline->priv->expected_async_done == 0) { amessage = gst_message_new_async_done (GST_OBJECT_CAST (bin), GST_CLOCK_TIME_NONE); GST_INFO_OBJECT (timeline, "Posting ASYNC_DONE %s", gst_structure_get_string (mstructure, "reason")); } GST_OBJECT_UNLOCK (timeline); } if (amessage) gst_element_post_message (GST_ELEMENT_CAST (bin), amessage); } forward: gst_element_post_message (GST_ELEMENT_CAST (bin), message); } /* 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); GstBinClass *bin_class = GST_BIN_CLASS (klass); GST_DEBUG_CATEGORY_INIT (ges_timeline_debug, "gestimeline", GST_DEBUG_FG_YELLOW, "ges timeline"); timeline_tree_init_debug (); 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; bin_class->handle_message = GST_DEBUG_FUNCPTR (ges_timeline_handle_message); /** * 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 a new layer is 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::group-added * @timeline: the #GESTimeline * @group: the #GESGroup * * Will be emitted after a new group is added to to the timeline. */ ges_timeline_signals[GROUP_ADDED] = g_signal_new ("group-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, group_added), NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_GROUP); /** * GESTimeline::group-removed * @timeline: the #GESTimeline * @group: the #GESGroup * @children: (element-type GES.Container) (transfer container): a list of #GESContainer * * Will be emitted after a group has been removed from the timeline. */ ges_timeline_signals[GROUP_REMOVED] = g_signal_new ("group-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, group_removed), NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 2, GES_TYPE_GROUP, G_TYPE_PTR_ARRAY); /** * GESTimeline::snapping-started: * @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 */ 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-ended: * @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 */ 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 */ 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); /** * GESTimeline::commited: * @timeline: the #GESTimeline * * This signal will be emitted once the changes initiated by #ges_timeline_commit * have been executed in the backend. Use #ges_timeline_commit_sync if you * don't need to do anything in the meantime. */ ges_timeline_signals[COMMITED] = g_signal_new ("commited", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 0); } static void ges_timeline_init (GESTimeline * self) { GESTimelinePrivate *priv = self->priv; self->priv = ges_timeline_get_instance_private (self); self->priv->tree = g_node_new (self); priv = self->priv; self->layers = NULL; self->tracks = NULL; self->priv->duration = 0; self->priv->auto_transition = FALSE; priv->snapping_distance = 0; priv->expected_async_done = 0; priv->expected_commited = 0; self->priv->last_snap_ts = GST_CLOCK_TIME_NONE; priv->priv_tracks = NULL; priv->needs_transitions_update = TRUE; priv->all_elements = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, gst_object_unref); priv->stream_start_group_id = -1; g_signal_connect_after (self, "select-tracks-for-object", G_CALLBACK (select_tracks_for_object_default), NULL); g_rec_mutex_init (&priv->dyn_mutex); g_mutex_init (&priv->commited_lock); priv->valid_thread = g_thread_self (); } /* Private methods */ static inline GESContainer * get_toplevel_container (gpointer element) { GESTimelineElement *ret = ges_timeline_element_get_toplevel_parent ((GESTimelineElement *) (element)); /* We own a ref to the elements ourself */ gst_object_unref (ret); return (GESContainer *) ret; } /* 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 _resync_layers (GESTimeline * timeline) { GList *tmp; gint i = 0; timeline->priv->resyncing_layers = TRUE; for (tmp = timeline->layers; tmp; tmp = tmp->next) { layer_set_priority (tmp->data, i, TRUE); i++; } timeline->priv->resyncing_layers = FALSE; } void timeline_update_duration (GESTimeline * timeline) { GstClockTime duration = timeline_tree_get_duration (timeline->priv->tree); if (timeline->priv->duration != duration) { GST_DEBUG ("track duration : %" GST_TIME_FORMAT " current : %" GST_TIME_FORMAT, GST_TIME_ARGS (duration), GST_TIME_ARGS (timeline->priv->duration)); timeline->priv->duration = duration; g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_DURATION]); } } static gint custom_find_track (TrackPrivate * tr_priv, GESTrack * track) { if (tr_priv->track == track) return 0; return -1; } 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); priv->auto_transitions = g_list_remove (priv->auto_transitions, auto_transition); gst_object_unref (auto_transition); } GESAutoTransition * ges_timeline_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)); g_object_unref (asset); } 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); timeline->priv->auto_transitions = g_list_prepend (timeline->priv->auto_transitions, auto_transition); return auto_transition; } GESAutoTransition * ges_timeline_find_auto_transition (GESTimeline * timeline, GESTrackElement * prev, GESTrackElement * next, GstClockTime transition_duration) { GList *tmp; for (tmp = timeline->priv->auto_transitions; tmp; tmp = tmp->next) { GESAutoTransition *auto_trans = (GESAutoTransition *) tmp->data; /* We already have a transition linked to one of the elements we want to * find a transition for */ if (auto_trans->previous_source == prev || auto_trans->next_source == next) { if (auto_trans->previous_source != prev || auto_trans->next_source != next) { GST_ERROR_OBJECT (timeline, "Failed creating auto transition, " " trying to have 3 clips overlapping, rolling back"); } return auto_trans; } } return NULL; } static GESAutoTransition * _create_auto_transition_from_transitions (GESTimeline * timeline, GESTrackElement * prev, GESTrackElement * next, GstClockTime transition_duration) { GList *tmp, *elements; GESLayer *layer; guint32 layer_prio = GES_TIMELINE_ELEMENT_LAYER_PRIORITY (prev); GESTrack *track; GESAutoTransition *auto_transition = ges_timeline_find_auto_transition (timeline, prev, next, transition_duration); if (auto_transition) return auto_transition; layer = ges_timeline_get_layer (timeline, layer_prio); track = ges_track_element_get_track (prev); elements = ges_track_get_elements (track); for (tmp = elements; tmp; tmp = tmp->next) { GESTrackElement *maybe_transition = tmp->data; if (ges_timeline_element_get_layer_priority (tmp->data) != layer_prio) 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 */ auto_transition = ges_timeline_create_transition (timeline, prev, next, GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (maybe_transition)), layer, _START (next), transition_duration); break; } } gst_object_unref (layer); g_list_free_full (elements, gst_object_unref); return auto_transition; } void ges_timeline_emit_snapping (GESTimeline * timeline, GESTimelineElement * elem1, GESTimelineElement * elem2, GstClockTime snap_time) { GESTimelinePrivate *priv = timeline->priv; GstClockTime last_snap_ts = timeline->priv->last_snap_ts; if (!GST_CLOCK_TIME_IS_VALID (snap_time)) { if (priv->last_snaped1 != NULL && priv->last_snaped2 != NULL) { g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0, priv->last_snaped1, priv->last_snaped2, last_snap_ts); priv->last_snaped1 = NULL; priv->last_snaped2 = NULL; priv->last_snap_ts = GST_CLOCK_TIME_NONE; } return; } g_assert (elem1 != elem2); if (GES_IS_CLIP (elem1)) { g_assert (GES_CONTAINER_CHILDREN (elem1)); elem1 = GES_CONTAINER_CHILDREN (elem1)->data; } if (GES_IS_CLIP (elem2)) { g_assert (GES_CONTAINER_CHILDREN (elem2)); elem2 = GES_CONTAINER_CHILDREN (elem2)->data; } if (last_snap_ts != snap_time) { g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0, priv->last_snaped1, priv->last_snaped2, (last_snap_ts)); /* We want the snap start signal to be emited anyway */ timeline->priv->last_snap_ts = GST_CLOCK_TIME_NONE; } if (!GST_CLOCK_TIME_IS_VALID (timeline->priv->last_snap_ts)) { priv->last_snaped1 = (GESTrackElement *) elem1; priv->last_snaped2 = (GESTrackElement *) elem2; timeline->priv->last_snap_ts = snap_time; g_signal_emit (timeline, ges_timeline_signals[SNAPING_STARTED], 0, elem1, elem2, snap_time); } } gboolean ges_timeline_trim_object_simple (GESTimeline * timeline, GESTimelineElement * element, guint32 new_layer_priority, GList * layers, GESEdge edge, guint64 position, gboolean snapping) { return timeline_trim_object (timeline, element, new_layer_priority, layers, edge, position); } gboolean timeline_ripple_object (GESTimeline * timeline, GESTimelineElement * obj, gint new_layer_priority, GList * layers, GESEdge edge, guint64 position) { gboolean res = TRUE; guint64 new_duration; GstClockTimeDiff diff; switch (edge) { case GES_EDGE_NONE: GST_DEBUG ("Simply rippling"); diff = GST_CLOCK_DIFF (position, _START (obj)); timeline->priv->needs_transitions_update = FALSE; res = timeline_tree_ripple (timeline->priv->tree, (gint64) GES_TIMELINE_ELEMENT_LAYER_PRIORITY (obj) - (gint64) new_layer_priority, diff, obj, GES_EDGE_NONE, timeline->priv->snapping_distance); timeline->priv->needs_transitions_update = TRUE; break; case GES_EDGE_END: GST_DEBUG ("Rippling end"); timeline->priv->needs_transitions_update = FALSE; new_duration = CLAMP (position - obj->start, 0, obj->maxduration - obj->inpoint); res = timeline_tree_ripple (timeline->priv->tree, (gint64) GES_TIMELINE_ELEMENT_LAYER_PRIORITY (obj) - (gint64) new_layer_priority, _DURATION (obj) - new_duration, obj, GES_EDGE_END, timeline->priv->snapping_distance); timeline->priv->needs_transitions_update = TRUE; GST_DEBUG ("Done Rippling end"); break; case GES_EDGE_START: GST_INFO ("Ripple start doesn't make sense, trimming instead"); if (!timeline_trim_object (timeline, obj, -1, layers, edge, position)) goto error; break; default: GST_DEBUG ("Can not ripple edge: %i", edge); break; } return res; error: 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; } static gboolean _trim_transition (GESTimeline * timeline, GESTimelineElement * element, GESEdge edge, GstClockTime position) { GList *tmp; GESLayer *layer = ges_timeline_get_layer (timeline, GES_TIMELINE_ELEMENT_LAYER_PRIORITY (element)); if (!ges_layer_get_auto_transition (layer)) goto fail; gst_object_unref (layer); for (tmp = timeline->priv->auto_transitions; tmp; tmp = tmp->next) { GESAutoTransition *auto_transition = tmp->data; if (GES_TIMELINE_ELEMENT (auto_transition->transition) == element || GES_TIMELINE_ELEMENT (auto_transition->transition_clip) == element) { /* Trimming an auto transition means trimming its neighboors */ if (!auto_transition->positioning) { if (edge == GES_EDGE_END) { ges_container_edit (GES_CONTAINER (auto_transition->previous_clip), NULL, -1, GES_EDIT_MODE_TRIM, GES_EDGE_END, position); } else { ges_container_edit (GES_CONTAINER (auto_transition->next_clip), NULL, -1, GES_EDIT_MODE_TRIM, GES_EDGE_START, position); } return TRUE; } return FALSE; } } return FALSE; fail: gst_object_unref (layer); return FALSE; } gboolean timeline_trim_object (GESTimeline * timeline, GESTimelineElement * object, guint32 new_layer_priority, GList * layers, GESEdge edge, guint64 position) { if ((GES_IS_TRANSITION (object) || GES_IS_TRANSITION_CLIP (object)) && !ELEMENT_FLAG_IS_SET (object, GES_TIMELINE_ELEMENT_SET_SIMPLE)) { return _trim_transition (timeline, object, edge, position); } return timeline_tree_trim (timeline->priv->tree, GES_TIMELINE_ELEMENT (object), new_layer_priority > 0 ? (gint64) ges_timeline_element_get_layer_priority (GES_TIMELINE_ELEMENT (object)) - new_layer_priority : 0, edge == GES_EDGE_END ? GST_CLOCK_DIFF (position, _START (object) + _DURATION (object)) : GST_CLOCK_DIFF (position, GES_TIMELINE_ELEMENT_START (object)), edge, timeline->priv->snapping_distance); } gboolean timeline_roll_object (GESTimeline * timeline, GESTimelineElement * element, GList * layers, GESEdge edge, guint64 position) { return timeline_tree_roll (timeline->priv->tree, element, (edge == GES_EDGE_END) ? GST_CLOCK_DIFF (position, _END (element)) : GST_CLOCK_DIFF (position, _START (element)), edge, timeline->priv->snapping_distance); } gboolean timeline_move_object (GESTimeline * timeline, GESTimelineElement * object, guint32 new_layer_priority, GList * layers, GESEdge edge, guint64 position) { gboolean ret = FALSE; GstClockTimeDiff offset = edge == GES_EDGE_END ? GST_CLOCK_DIFF (position, _START (object) + _DURATION (object)) : GST_CLOCK_DIFF (position, GES_TIMELINE_ELEMENT_START (object)); ret = timeline_tree_move (timeline->priv->tree, GES_TIMELINE_ELEMENT (object), new_layer_priority < 0 ? 0 : (gint64) ges_timeline_element_get_layer_priority (GES_TIMELINE_ELEMENT (object)) - new_layer_priority, offset, edge, timeline->priv->snapping_distance); return ret; } gboolean ges_timeline_move_object_simple (GESTimeline * timeline, GESTimelineElement * element, GList * layers, GESEdge edge, guint64 position) { return timeline_move_object (timeline, element, ges_timeline_element_get_layer_priority (element), NULL, edge, position); } void timeline_add_group (GESTimeline * timeline, GESGroup * group) { GST_DEBUG_OBJECT (timeline, "Adding group %" GST_PTR_FORMAT, group); timeline->priv->groups = g_list_prepend (timeline->priv->groups, gst_object_ref_sink (group)); ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (group), timeline); } void timeline_update_transition (GESTimeline * timeline) { GList *tmp, *auto_transs; auto_transs = g_list_copy (timeline->priv->auto_transitions); for (tmp = auto_transs; tmp; tmp = tmp->next) ges_auto_transition_update (tmp->data); g_list_free (auto_transs); } /** * timeline_emit_group_added: * @timeline: a #GESTimeline * @group: group that was added * * Emit group-added signal. */ void timeline_emit_group_added (GESTimeline * timeline, GESGroup * group) { g_signal_emit (timeline, ges_timeline_signals[GROUP_ADDED], 0, group); } /** * timeline_emit_group_removed: * @timeline: a #GESTimeline * @group: group that was removed * * Emit group-removed signal. */ void timeline_emit_group_removed (GESTimeline * timeline, GESGroup * group, GPtrArray * array) { g_signal_emit (timeline, ges_timeline_signals[GROUP_REMOVED], 0, group, array); } void timeline_remove_group (GESTimeline * timeline, GESGroup * group) { GST_DEBUG_OBJECT (timeline, "Removing group %" GST_PTR_FORMAT, group); timeline->priv->groups = g_list_remove (timeline->priv->groups, group); ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (group), NULL); gst_object_unref (group); } 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, *list; 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; list = ges_clip_create_track_elements (clip, track->type); g_list_free (list); } } static void layer_auto_transition_changed_cb (GESLayer * layer, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { GList *tmp, *clips; timeline_tree_create_transitions (timeline->priv->tree, _create_auto_transition_from_transitions); clips = ges_layer_get_clips (layer); for (tmp = clips; tmp; tmp = tmp->next) { if (GES_IS_TRANSITION_CLIP (tmp->data)) { GList *tmpautotrans; gboolean found = FALSE; for (tmpautotrans = timeline->priv->auto_transitions; tmpautotrans; tmpautotrans = tmpautotrans->next) { if (GES_AUTO_TRANSITION (tmpautotrans->data)->transition_clip == tmp->data) { found = TRUE; break; } } if (!found) { GST_ERROR_OBJECT (timeline, "Transition %s could not be wrapped into an auto transition" " REMOVING it", GES_TIMELINE_ELEMENT_NAME (tmp->data)); ges_layer_remove_clip (layer, tmp->data); } } } g_list_free_full (clips, gst_object_unref); } static void clip_track_element_added_cb (GESClip * clip, GESTrackElement * track_element, GESTimeline * timeline) { guint i; GESTrack *track; gboolean is_source; GPtrArray *tracks = NULL; GESTrackElement *existing_src = 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 (stopping 'child-added' signal emission).", track_element, ges_track_type_name (ges_track_element_get_track_type (track_element))); if (tracks) g_ptr_array_unref (tracks); g_signal_stop_emission_by_name (clip, "child-added"); 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); is_source = g_type_is_a (G_OBJECT_TYPE (track_element), GES_TYPE_SOURCE); if (is_source) existing_src = ges_clip_find_track_element (clip, track, GES_TYPE_SOURCE); if (existing_src == NULL) { 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)); g_ptr_array_unref (tracks); return; } } else { GST_INFO_OBJECT (clip, "Already had a Source Element in %" GST_PTR_FORMAT " of type %s, removing new one. (stopping 'child-added' emission)", track, G_OBJECT_TYPE_NAME (track_element)); g_signal_stop_emission_by_name (clip, "child-added"); ges_container_remove (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (track_element)); } gst_object_unref (track); g_clear_object (&existing_src); /* 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); if (is_source) existing_src = ges_clip_find_track_element (clip, track, GES_TYPE_SOURCE); if (existing_src == NULL) { ges_container_remove (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (track_element)); gst_object_unref (track); g_ptr_array_unref (tracks); continue; } else { GST_INFO_OBJECT (clip, "Already had a Source Element in %" GST_PTR_FORMAT " of type %s, removing new one. (stopping 'child-added' emission)", track, G_OBJECT_TYPE_NAME (track_element)); g_signal_stop_emission_by_name (clip, "child-added"); ges_container_remove (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (track_element)); } g_clear_object (&existing_src); 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); g_ptr_array_unref (tracks); 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); g_ptr_array_unref (tracks); return; } gst_object_unref (track); } timeline->priv->ignore_track_element_added = NULL; g_ptr_array_unref (tracks); if (GES_IS_SOURCE (track_element)) timeline_tree_create_transitions (timeline->priv->tree, ges_timeline_find_auto_transition); } 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) { GESProject *project; /* 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_tree_create_transitions (timeline->priv->tree, ges_timeline_find_auto_transition); return; } add_object_to_tracks (timeline, clip, NULL); GST_DEBUG ("Making sure that the asset is in our project"); project = GES_PROJECT (ges_extractable_get_asset (GES_EXTRACTABLE (timeline))); ges_project_add_asset (project, ges_extractable_get_asset (GES_EXTRACTABLE (clip))); GST_DEBUG ("Done"); } static void layer_priority_changed_cb (GESLayer * layer, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { if (timeline->priv->resyncing_layers) return; 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), FALSE); for (tmp = trackelements; tmp; tmp = tmp->next) { GESTrackElement *track_element = (GESTrackElement *) tmp->data; GESTrack *track = ges_track_element_get_track (track_element); if (!track) continue; 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_track_remove_element (track, 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) { timeline_update_duration (timeline); } 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); } static void track_element_removed_cb (GESTrack * track, GESTrackElement * track_element, GESTimeline * timeline) { /* Disconnect all signal handlers */ g_signal_handlers_disconnect_by_func (track_element, trackelement_start_changed_cb, timeline); } static GstPadProbeReturn _pad_probe_cb (GstPad * mixer_pad, GstPadProbeInfo * info, GESTimeline * timeline) { GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info); if (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START) { LOCK_DYN (timeline); if (timeline->priv->stream_start_group_id == -1) { if (!gst_event_parse_group_id (event, &timeline->priv->stream_start_group_id)) timeline->priv->stream_start_group_id = gst_util_group_id_next (); } info->data = gst_event_make_writable (event); gst_event_set_group_id (GST_PAD_PROBE_INFO_EVENT (info), timeline->priv->stream_start_group_id); UNLOCK_DYN (timeline); return GST_PAD_PROBE_REMOVE; } return GST_PAD_PROBE_OK; } static void _ghost_track_srcpad (TrackPrivate * tr_priv) { GstPad *pad; gchar *padname; gboolean no_more; GList *tmp; GESTrack *track = tr_priv->track; pad = gst_element_get_static_pad (GST_ELEMENT (track), "src"); GST_DEBUG ("track:%p, pad:%s:%s", track, GST_DEBUG_PAD_NAME (pad)); /* 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)); } tr_priv->probe_id = gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, (GstPadProbeCallback) _pad_probe_cb, tr_priv->timeline, NULL); UNLOCK_DYN (tr_priv->timeline); } gboolean timeline_add_element (GESTimeline * timeline, GESTimelineElement * element) { GESTimelineElement *same_name = g_hash_table_lookup (timeline->priv->all_elements, element->name); GST_DEBUG_OBJECT (timeline, "Adding element: %s", element->name); if (same_name) { GST_ERROR_OBJECT (timeline, "%s Already in the timeline %" GST_PTR_FORMAT, element->name, same_name); return FALSE; } g_hash_table_insert (timeline->priv->all_elements, ges_timeline_element_get_name (element), gst_object_ref (element)); timeline_tree_track_element (timeline->priv->tree, element); return TRUE; } gboolean timeline_remove_element (GESTimeline * timeline, GESTimelineElement * element) { if (g_hash_table_remove (timeline->priv->all_elements, element->name)) { timeline_tree_stop_tracking_element (timeline->priv->tree, element); return TRUE; } return FALSE; } void timeline_fill_gaps (GESTimeline * timeline) { GList *tmp; for (tmp = timeline->tracks; tmp; tmp = tmp->next) { track_resort_and_fill_gaps (tmp->data); } } GNode * timeline_get_tree (GESTimeline * timeline) { return timeline->priv->tree; } /**** API *****/ /** * ges_timeline_new: * * Creates a new empty #GESTimeline. * * Returns: (transfer floating): The new timeline. */ GESTimeline * ges_timeline_new (void) { GESProject *project = ges_project_new (NULL); GESExtractable *timeline = g_object_new (GES_TYPE_TIMELINE, NULL); ges_extractable_set_asset (timeline, GES_ASSET (project)); gst_object_unref (project); return GES_TIMELINE (timeline); } /** * 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: (transfer floating) (nullable): 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_get_groups: * @timeline: a #GESTimeline * * Get the list of #GESGroup present in the Timeline. * * Returns: (transfer none) (element-type GESGroup): the list of * #GESGroup that contain clips present in the timeline's layers. * Must not be changed. */ GList * ges_timeline_get_groups (GESTimeline * timeline) { g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); return timeline->priv->groups; } /** * 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; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); 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: (transfer floating): 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; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_LAYER (layer), FALSE); CHECK_THREAD (timeline); 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"); gst_object_ref_sink (layer); gst_object_unref (layer); 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"); gst_object_ref_sink (layer); gst_object_unref (layer); 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); /* Connect to 'clip-added'/'clip-removed' signal from the new layer */ g_signal_connect_after (layer, "clip-added", G_CALLBACK (layer_object_added_cb), timeline); g_signal_connect_after (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; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_LAYER (layer), FALSE); CHECK_THREAD (timeline); 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); 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: (transfer full): 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; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_TRACK (track), FALSE); CHECK_THREAD (timeline); 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); /* 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"); _ghost_track_srcpad (tr_priv); /* 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)); g_object_set (track, "message-forward", TRUE, NULL); 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); CHECK_THREAD (timeline); 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; gst_object_unref (tr_priv->pad); 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, 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) (nullable): 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; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); 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_pad_for_track: * @timeline: The #GESTimeline * @track: The #GESTrack * * Search the #GstPad corresponding to the given @timeline's @track. * * Returns: (transfer none) (nullable): The corresponding #GstPad if it is * found, or %NULL if there is an error. */ GstPad * ges_timeline_get_pad_for_track (GESTimeline * timeline, GESTrack * track) { GList *tmp; LOCK_DYN (timeline); for (tmp = timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) { TrackPrivate *tr_priv = (TrackPrivate *) tmp->data; if (track == tr_priv->track) { if (tr_priv->ghostpad) gst_object_ref (tr_priv->ghostpad); UNLOCK_DYN (timeline); return tr_priv->ghostpad; } } 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); CHECK_THREAD (timeline); 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; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); 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; } static void track_commited_cb (GESTrack * track, GESTimeline * timeline) { gboolean emit_commited = FALSE; GST_OBJECT_LOCK (timeline); timeline->priv->expected_commited -= 1; if (timeline->priv->expected_commited == 0) emit_commited = TRUE; g_signal_handlers_disconnect_by_func (track, track_commited_cb, timeline); GST_OBJECT_UNLOCK (timeline); if (emit_commited) { g_signal_emit (timeline, ges_timeline_signals[COMMITED], 0); } } /* Must be called with the timeline's DYN_LOCK */ static gboolean ges_timeline_commit_unlocked (GESTimeline * timeline) { GList *tmp; gboolean res = TRUE; GST_DEBUG_OBJECT (timeline, "commiting changes"); timeline_tree_create_transitions (timeline->priv->tree, ges_timeline_find_auto_transition); for (tmp = timeline->layers; tmp; tmp = tmp->next) { GESLayer *layer = tmp->data; /* Ensure clip priorities are correct after an edit */ ges_layer_resync_priorities (layer); } timeline->priv->expected_commited = g_list_length (timeline->priv->priv_tracks); if (timeline->priv->expected_commited == 0) { g_signal_emit (timeline, ges_timeline_signals[COMMITED], 0); } else { for (tmp = timeline->tracks; tmp; tmp = tmp->next) { g_signal_connect (tmp->data, "commited", G_CALLBACK (track_commited_cb), timeline); if (!ges_track_commit (GES_TRACK (tmp->data))) res = FALSE; } } return res; } /** * ges_timeline_commit: * @timeline: a #GESTimeline * * Commit all the pending changes of the clips contained in the * @timeline. * * When changes happen in a timeline, they are not * directly executed in the non-linear engine. Call this method once you are * done with a set of changes and want it to be executed. * * The #GESTimeline::commited signal will be emitted when the (possibly updated) * #GstPipeline is ready to output data again, except if the state of the * timeline was #GST_STATE_READY or #GST_STATE_NULL. * * Note that all the pending changes will automatically be executed when the * timeline goes from #GST_STATE_READY to #GST_STATE_PAUSED, which usually is * triggered by corresponding state changes in a containing #GESPipeline. * * You should not try to change the state of the timeline, seek it or add * tracks to it during a commit operation, that is between a call to this * function and after receiving the #GESTimeline::commited signal. * * See #ges_timeline_commit_sync if you don't want to bother with waiting * for the signal. * * Returns: %TRUE if pending changes were commited or %FALSE if nothing needed * to be commited */ gboolean ges_timeline_commit (GESTimeline * timeline) { gboolean ret; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); LOCK_DYN (timeline); ret = ges_timeline_commit_unlocked (timeline); UNLOCK_DYN (timeline); ges_timeline_emit_snapping (timeline, NULL, NULL, GST_CLOCK_TIME_NONE); return ret; } static void commited_cb (GESTimeline * timeline) { g_mutex_lock (&timeline->priv->commited_lock); g_cond_signal (&timeline->priv->commited_cond); g_mutex_unlock (&timeline->priv->commited_lock); } /** * ges_timeline_commit_sync: * @timeline: a #GESTimeline * * Commit all the pending changes of the #GESClips contained in the * @timeline. * * Will return once the update is complete, that is when the * (possibly updated) #GstPipeline is ready to output data again, or if the * state of the timeline was #GST_STATE_READY or #GST_STATE_NULL. * * This function will wait for any pending state change of the timeline by * calling #gst_element_get_state with a #GST_CLOCK_TIME_NONE timeout, you * should not try to change the state from another thread before this function * has returned. * * See #ges_timeline_commit for more information. * * Returns: %TRUE if pending changes were commited or %FALSE if nothing needed * to be commited */ gboolean ges_timeline_commit_sync (GESTimeline * timeline) { gboolean ret; gboolean wait_for_signal; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); /* Let's make sure our state is stable */ gst_element_get_state (GST_ELEMENT (timeline), NULL, NULL, GST_CLOCK_TIME_NONE); /* Let's make sure no track gets added between now and the actual commiting */ LOCK_DYN (timeline); wait_for_signal = g_list_length (timeline->priv->priv_tracks) > 0 && GST_STATE (timeline) >= GST_STATE_PAUSED; if (!wait_for_signal) { ret = ges_timeline_commit_unlocked (timeline); } else { gulong handler_id = g_signal_connect (timeline, "commited", (GCallback) commited_cb, NULL); g_mutex_lock (&timeline->priv->commited_lock); ret = ges_timeline_commit_unlocked (timeline); g_cond_wait (&timeline->priv->commited_cond, &timeline->priv->commited_lock); g_mutex_unlock (&timeline->priv->commited_lock); g_signal_handler_disconnect (timeline, handler_id); } UNLOCK_DYN (timeline); return ret; } /** * 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); CHECK_THREAD (timeline); 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), FALSE); CHECK_THREAD (timeline); 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)); CHECK_THREAD (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); } } /** * ges_timeline_get_snapping_distance: * @timeline: a #GESTimeline * * Gets the configured snapping distance of the timeline. See * the documentation of the property snapping_distance for more * information. * * Returns: The @snapping_distance property of the timeline */ GstClockTime ges_timeline_get_snapping_distance (GESTimeline * timeline) { g_return_val_if_fail (GES_IS_TIMELINE (timeline), GST_CLOCK_TIME_NONE); CHECK_THREAD (timeline); return timeline->priv->snapping_distance; } /** * ges_timeline_set_snapping_distance: * @timeline: a #GESLayer * @snapping_distance: whether the snapping_distance is active * * Sets the @snapping_distance of the timeline. See the documentation of the * property snapping_distance for more information. */ void ges_timeline_set_snapping_distance (GESTimeline * timeline, GstClockTime snapping_distance) { g_return_if_fail (GES_IS_TIMELINE (timeline)); CHECK_THREAD (timeline); timeline->priv->snapping_distance = snapping_distance; } /** * ges_timeline_get_element: * @timeline: a #GESTimeline * * Gets a #GESTimelineElement contained in the timeline * * Returns: (transfer full) (nullable): The #GESTimelineElement or %NULL if * not found. */ GESTimelineElement * ges_timeline_get_element (GESTimeline * timeline, const gchar * name) { GESTimelineElement *ret; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); ret = g_hash_table_lookup (timeline->priv->all_elements, name); if (ret) return gst_object_ref (ret); #ifndef GST_DISABLE_GST_DEBUG { GList *element_names, *tmp; element_names = g_hash_table_get_keys (timeline->priv->all_elements); GST_INFO_OBJECT (timeline, "Does not contain element %s", name); for (tmp = element_names; tmp; tmp = tmp->next) { GST_DEBUG_OBJECT (timeline, "Containes: %s", (gchar *) tmp->data); } g_list_free (element_names); } #endif return NULL; } /** * ges_timeline_is_empty: * @timeline: a #GESTimeline * * Check whether a #GESTimeline is empty or not * * Returns: %TRUE if the timeline is empty %FALSE otherwize */ gboolean ges_timeline_is_empty (GESTimeline * timeline) { GHashTableIter iter; gpointer key, value; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); CHECK_THREAD (timeline); if (g_hash_table_size (timeline->priv->all_elements) == 0) return TRUE; g_hash_table_iter_init (&iter, timeline->priv->all_elements); while (g_hash_table_iter_next (&iter, &key, &value)) { if (GES_IS_SOURCE (value) && ges_track_element_is_active (GES_TRACK_ELEMENT (value))) return FALSE; } return TRUE; } /** * ges_timeline_get_layer: * @timeline: The #GESTimeline to retrive a layer from * @priority: The priority of the layer to find * * Retrieve the layer with @priority as a priority * * Returns: (transfer full) (nullable): A #GESLayer or %NULL if no layer with * @priority was found * * Since 1.6 */ GESLayer * ges_timeline_get_layer (GESTimeline * timeline, guint priority) { GList *tmp; GESLayer *layer = NULL; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); for (tmp = timeline->layers; tmp; tmp = tmp->next) { GESLayer *tmp_layer = GES_LAYER (tmp->data); guint tmp_priority; g_object_get (tmp_layer, "priority", &tmp_priority, NULL); if (tmp_priority == priority) { layer = gst_object_ref (tmp_layer); break; } } return layer; } /** * ges_timeline_paste_element: * @timeline: The #GESTimeline onto which the #GESTimelineElement should be pasted * @element: The #GESTimelineElement to paste * @position: The position in the timeline the element should * be pasted to, meaning it will become the start of @element * @layer_priority: The #GESLayer to which the element should be pasted to. * -1 means paste to the same layer from which the @element has been copied from. * * Paste @element inside the timeline. @element must have been * created using ges_timeline_element_copy with deep=TRUE set, * i.e. it must be a deep copy, otherwise it will fail. * * Returns: (transfer none): Shallow copy of the @element pasted */ GESTimelineElement * ges_timeline_paste_element (GESTimeline * timeline, GESTimelineElement * element, GstClockTime position, gint layer_priority) { GESTimelineElement *res, *copied_from; GESTimelineElementClass *element_class; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (element), FALSE); CHECK_THREAD (timeline); element_class = GES_TIMELINE_ELEMENT_GET_CLASS (element); copied_from = ges_timeline_element_get_copied_from (element); if (!copied_from) { GST_ERROR_OBJECT (element, "Is not being 'deeply' copied!"); return NULL; } if (!element_class->paste) { GST_ERROR_OBJECT (element, "No paste vmethod implemented"); return NULL; } /* * Currently the API only supports pasting onto the same layer from which * the @element has been copied from, i.e., @layer_priority needs to be -1. */ if (layer_priority != -1) { GST_WARNING_OBJECT (timeline, "Only -1 value for layer priority is supported"); } res = element_class->paste (element, copied_from, position); g_clear_object (&copied_from); return g_object_ref (res); } /** * ges_timeline_move_layer: * @timeline: The timeline in which @layer must be * @layer: The layer to move at @new_layer_priority * @new_layer_priority: The index at which @layer should land * * Moves @layer at @new_layer_priority meaning that @layer * we land at that position in the stack of layers inside * the timeline. If @new_layer_priority is superior than the number * of layers present in the time, it will move to the end of the * stack of layers. * * Since: 1.16 */ gboolean ges_timeline_move_layer (GESTimeline * timeline, GESLayer * layer, guint new_layer_priority) { gint current_priority; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_LAYER (layer), FALSE); g_return_val_if_fail (ges_layer_get_timeline (layer) == timeline, FALSE); CHECK_THREAD (timeline); current_priority = ges_layer_get_priority (layer); if (new_layer_priority == current_priority) { GST_DEBUG_OBJECT (timeline, "Nothing to do for %" GST_PTR_FORMAT ", same priorities", layer); return TRUE; } timeline->layers = g_list_remove (timeline->layers, layer); timeline->layers = g_list_insert (timeline->layers, layer, (gint) new_layer_priority); _resync_layers (timeline); return TRUE; }