/* GStreamer Editing Services * Copyright (C) 2013 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:gesgroup * @title: GESGroup * @short_description: Class that permits to group GESClip-s in a timeline, * letting the user manage it a single GESTimelineElement * * A #GESGroup is an object which controls one or more * #GESClips in one or more #GESLayer(s). * * To instanciate a group, you should use the ges_container_group method, * this will be responsible for deciding what subclass of #GESContainer * should be instaciated to group the various #GESTimelineElement passed * in parametter. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "ges-group.h" #include "ges.h" #include "ges-internal.h" #include #define parent_class ges_group_parent_class #define GES_CHILDREN_INIBIT_SIGNAL_EMISSION (GES_CHILDREN_LAST + 1) #define GES_GROUP_SIGNALS_IDS_DATA_KEY_FORMAT "ges-group-signals-ids-%p" struct _GESGroupPrivate { gboolean reseting_start; guint32 max_layer_prio; /* This is used while were are setting ourselve a proper timing value, * in this case the value should always be kept */ gboolean setting_value; }; typedef struct { GESLayer *layer; gulong child_clip_changed_layer_sid; gulong child_priority_changed_sid; gulong child_group_priority_changed_sid; } ChildSignalIds; enum { PROP_0, PROP_START, PROP_INPOINT, PROP_DURATION, PROP_MAX_DURATION, PROP_PRIORITY, PROP_LAST }; static GParamSpec *properties[PROP_LAST] = { NULL, }; G_DEFINE_TYPE_WITH_PRIVATE (GESGroup, ges_group, GES_TYPE_CONTAINER); /**************************************************** * Our listening of children * ****************************************************/ static void _update_our_values (GESGroup * group) { GList *tmp; GESContainer *container = GES_CONTAINER (group); guint32 min_layer_prio = G_MAXINT32, max_layer_prio = 0; for (tmp = GES_CONTAINER_CHILDREN (group); tmp; tmp = tmp->next) { GESContainer *child = tmp->data; if (GES_IS_CLIP (child)) { GESLayer *layer = ges_clip_get_layer (GES_CLIP (child)); gint32 prio; if (!layer) continue; prio = ges_layer_get_priority (layer); min_layer_prio = MIN (prio, min_layer_prio); max_layer_prio = MAX (prio, max_layer_prio); } else if (GES_IS_GROUP (child)) { gint32 prio = _PRIORITY (child), height = GES_CONTAINER_HEIGHT (child); min_layer_prio = MIN (prio, min_layer_prio); max_layer_prio = MAX ((prio + height), max_layer_prio); } } if (min_layer_prio != _PRIORITY (group)) { group->priv->setting_value = TRUE; _set_priority0 (GES_TIMELINE_ELEMENT (group), min_layer_prio); group->priv->setting_value = FALSE; for (tmp = GES_CONTAINER_CHILDREN (group); tmp; tmp = tmp->next) { GESTimelineElement *child = tmp->data; guint32 child_prio = GES_IS_CLIP (child) ? GES_TIMELINE_ELEMENT_LAYER_PRIORITY (child) : _PRIORITY (child); _ges_container_set_priority_offset (container, child, min_layer_prio - child_prio); } } group->priv->max_layer_prio = max_layer_prio; _ges_container_set_height (GES_CONTAINER (group), max_layer_prio - min_layer_prio + 1); } static void _child_priority_changed_cb (GESLayer * layer, GParamSpec * arg G_GNUC_UNUSED, GESTimelineElement * clip) { GESContainer *container = GES_CONTAINER (GES_TIMELINE_ELEMENT_PARENT (clip)); gint layer_prio = ges_layer_get_priority (layer); gint offset = _ges_container_get_priority_offset (container, clip); if (container->children_control_mode != GES_CHILDREN_UPDATE) { GST_DEBUG_OBJECT (container, "Ignoring updated"); return; } if (layer_prio + offset == _PRIORITY (container)) return; container->initiated_move = clip; _set_priority0 (GES_TIMELINE_ELEMENT (container), layer_prio + offset); container->initiated_move = NULL; } static void _child_clip_changed_layer_cb (GESTimelineElement * clip, GParamSpec * arg G_GNUC_UNUSED, GESGroup * group) { ChildSignalIds *sigids; gchar *signals_ids_key; GESLayer *old_layer, *new_layer; gint offset, layer_prio = GES_TIMELINE_ELEMENT_LAYER_PRIORITY (clip); GESContainer *container = GES_CONTAINER (group); offset = _ges_container_get_priority_offset (container, clip); signals_ids_key = g_strdup_printf (GES_GROUP_SIGNALS_IDS_DATA_KEY_FORMAT, clip); sigids = g_object_get_data (G_OBJECT (group), signals_ids_key); g_free (signals_ids_key); old_layer = sigids->layer; new_layer = ges_clip_get_layer (GES_CLIP (clip)); if (sigids->child_priority_changed_sid) { g_signal_handler_disconnect (old_layer, sigids->child_priority_changed_sid); sigids->child_priority_changed_sid = 0; } if (new_layer) { sigids->child_priority_changed_sid = g_signal_connect (new_layer, "notify::priority", (GCallback) _child_priority_changed_cb, clip); } sigids->layer = new_layer; if (container->children_control_mode != GES_CHILDREN_UPDATE) { if (container->children_control_mode == GES_CHILDREN_INIBIT_SIGNAL_EMISSION) { container->children_control_mode = GES_CHILDREN_UPDATE; g_signal_stop_emission_by_name (clip, "notify::layer"); } return; } if (new_layer && old_layer && (layer_prio + offset < 0 || (GES_TIMELINE_ELEMENT_TIMELINE (group) && layer_prio + offset + GES_CONTAINER_HEIGHT (group) - 1 > g_list_length (GES_TIMELINE_ELEMENT_TIMELINE (group)->layers)))) { GST_INFO_OBJECT (container, "Trying to move to a layer %" GST_PTR_FORMAT " outside of" "the timeline layers, moving back to old layer (prio %i)", new_layer, _PRIORITY (group) - offset); container->children_control_mode = GES_CHILDREN_INIBIT_SIGNAL_EMISSION; ges_clip_move_to_layer (GES_CLIP (clip), old_layer); g_signal_stop_emission_by_name (clip, "notify::layer"); return; } if (!new_layer || !old_layer) { _update_our_values (group); return; } container->initiated_move = clip; _set_priority0 (GES_TIMELINE_ELEMENT (group), layer_prio + offset); container->initiated_move = NULL; } static void _child_group_priority_changed (GESTimelineElement * child, GParamSpec * arg G_GNUC_UNUSED, GESGroup * group) { gint offset; GESContainer *container = GES_CONTAINER (group); if (container->children_control_mode != GES_CHILDREN_UPDATE) { GST_DEBUG_OBJECT (group, "Ignoring updated"); return; } offset = _ges_container_get_priority_offset (container, child); if (_PRIORITY (group) < offset || (GES_TIMELINE_ELEMENT_TIMELINE (group) && _PRIORITY (group) + offset + GES_CONTAINER_HEIGHT (group) > g_list_length (GES_TIMELINE_ELEMENT_TIMELINE (group)->layers))) { GST_WARNING_OBJECT (container, "Trying to move to a layer outside of" "the timeline layers"); return; } container->initiated_move = child; _set_priority0 (GES_TIMELINE_ELEMENT (group), _PRIORITY (child) + offset); container->initiated_move = NULL; } /**************************************************** * GESTimelineElement vmethods * ****************************************************/ static gboolean _trim (GESTimelineElement * group, GstClockTime start) { GList *tmp; GstClockTime last_child_end = 0, oldstart = _START (group); GESContainer *container = GES_CONTAINER (group); GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (group); gboolean ret = TRUE, expending = (start < _START (group)); if (timeline == NULL) { GST_DEBUG ("Not in a timeline yet"); return FALSE; } container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES; for (tmp = GES_CONTAINER_CHILDREN (group); tmp; tmp = tmp->next) { GESTimelineElement *child = tmp->data; if (expending) { /* If the start is bigger, we do not touch it (in case we are expending) */ if (_START (child) > oldstart) { GST_DEBUG_OBJECT (child, "Skipping as not at begining of the group"); continue; } ret &= ges_timeline_element_trim (child, start); } else { if (start > _END (child)) ret &= ges_timeline_element_trim (child, _END (child)); else if (_START (child) < start && _DURATION (child)) ret &= ges_timeline_element_trim (child, start); } } for (tmp = GES_CONTAINER_CHILDREN (group); tmp; tmp = tmp->next) { if (_DURATION (tmp->data)) last_child_end = MAX (GES_TIMELINE_ELEMENT_END (tmp->data), last_child_end); } GES_GROUP (group)->priv->setting_value = TRUE; _set_start0 (group, start); _set_duration0 (group, last_child_end - start); GES_GROUP (group)->priv->setting_value = FALSE; container->children_control_mode = GES_CHILDREN_UPDATE; return ret; } static gboolean _set_priority (GESTimelineElement * element, guint32 priority) { GList *tmp, *layers; gint diff = priority - _PRIORITY (element); GESContainer *container = GES_CONTAINER (element); if (GES_GROUP (element)->priv->setting_value == TRUE) return TRUE; container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES; layers = GES_TIMELINE_ELEMENT_TIMELINE (element) ? GES_TIMELINE_ELEMENT_TIMELINE (element)->layers : NULL; if (layers == NULL) { GST_WARNING_OBJECT (element, "Not any layer in the timeline, not doing" "anything, timeline: %" GST_PTR_FORMAT, GES_TIMELINE_ELEMENT_TIMELINE (element)); return FALSE; } else if (priority + GES_CONTAINER_HEIGHT (container) - 1 > g_list_length (layers)) { GST_WARNING_OBJECT (container, "Trying to move to a layer outside of" "the timeline layers"); return FALSE; } for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) { GESTimelineElement *child = tmp->data; if (child != container->initiated_move) { if (GES_IS_CLIP (child)) { guint32 layer_prio = GES_TIMELINE_ELEMENT_LAYER_PRIORITY (child) + diff; GST_DEBUG_OBJECT (child, "moving from layer: %i to %i", GES_TIMELINE_ELEMENT_LAYER_PRIORITY (child), layer_prio); ges_clip_move_to_layer (GES_CLIP (child), g_list_nth_data (layers, layer_prio)); } else if (GES_IS_GROUP (child)) { GST_DEBUG_OBJECT (child, "moving from %i to %i", _PRIORITY (child), diff + _PRIORITY (child)); ges_timeline_element_set_priority (child, diff + _PRIORITY (child)); } } } container->children_control_mode = GES_CHILDREN_UPDATE; return TRUE; } static gboolean _set_start (GESTimelineElement * element, GstClockTime start) { GList *tmp; gint64 diff = start - _START (element); GESContainer *container = GES_CONTAINER (element); if (GES_GROUP (element)->priv->setting_value == TRUE) /* Let GESContainer update itself */ return GES_TIMELINE_ELEMENT_CLASS (parent_class)->set_start (element, start); container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES; for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) { GESTimelineElement *child = (GESTimelineElement *) tmp->data; if (child != container->initiated_move && (_END (child) > _START (element) || _END (child) > start)) { _set_start0 (child, _START (child) + diff); } } container->children_control_mode = GES_CHILDREN_UPDATE; return TRUE; } static gboolean _set_inpoint (GESTimelineElement * element, GstClockTime inpoint) { return FALSE; } static gboolean _set_duration (GESTimelineElement * element, GstClockTime duration) { GList *tmp; GstClockTime last_child_end = 0, new_end; GESContainer *container = GES_CONTAINER (element); GESGroupPrivate *priv = GES_GROUP (element)->priv; if (priv->setting_value == TRUE) /* Let GESContainer update itself */ return GES_TIMELINE_ELEMENT_CLASS (parent_class)->set_duration (element, duration); if (container->initiated_move == NULL) { gboolean expending = (_DURATION (element) < duration); new_end = _START (element) + duration; container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES; for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) { GESTimelineElement *child = tmp->data; GstClockTime n_dur; if ((!expending && _END (child) > new_end) || (expending && (_END (child) >= _END (element)))) { n_dur = MAX (0, ((gint64) (new_end - _START (child)))); _set_duration0 (child, n_dur); } } container->children_control_mode = GES_CHILDREN_UPDATE; } for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) { if (_DURATION (tmp->data)) last_child_end = MAX (GES_TIMELINE_ELEMENT_END (tmp->data), last_child_end); } priv->setting_value = TRUE; _set_duration0 (element, last_child_end - _START (element)); priv->setting_value = FALSE; return FALSE; } /**************************************************** * * * GESContainer virtual methods implementation * * * ****************************************************/ static gboolean _add_child (GESContainer * group, GESTimelineElement * child) { g_return_val_if_fail (GES_IS_CONTAINER (child), FALSE); return TRUE; } static void _child_added (GESContainer * group, GESTimelineElement * child) { GList *children, *tmp; gchar *signals_ids_key; ChildSignalIds *signals_ids; GESGroupPrivate *priv = GES_GROUP (group)->priv; GstClockTime last_child_end = 0, first_child_start = G_MAXUINT64; if (!GES_TIMELINE_ELEMENT_TIMELINE (group) && GES_TIMELINE_ELEMENT_TIMELINE (child)) { timeline_add_group (GES_TIMELINE_ELEMENT_TIMELINE (child), GES_GROUP (group)); timeline_emit_group_added (GES_TIMELINE_ELEMENT_TIMELINE (child), GES_GROUP (group)); } children = GES_CONTAINER_CHILDREN (group); for (tmp = children; tmp; tmp = tmp->next) { last_child_end = MAX (GES_TIMELINE_ELEMENT_END (tmp->data), last_child_end); first_child_start = MIN (GES_TIMELINE_ELEMENT_START (tmp->data), first_child_start); } priv->setting_value = TRUE; if (first_child_start != GES_TIMELINE_ELEMENT_START (group)) { group->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES; _set_start0 (GES_TIMELINE_ELEMENT (group), first_child_start); } if (last_child_end != GES_TIMELINE_ELEMENT_END (group)) { _set_duration0 (GES_TIMELINE_ELEMENT (group), last_child_end - first_child_start); } priv->setting_value = FALSE; group->children_control_mode = GES_CHILDREN_UPDATE; _update_our_values (GES_GROUP (group)); signals_ids_key = g_strdup_printf (GES_GROUP_SIGNALS_IDS_DATA_KEY_FORMAT, child); signals_ids = g_malloc0 (sizeof (ChildSignalIds)); g_object_set_data_full (G_OBJECT (group), signals_ids_key, signals_ids, g_free); g_free (signals_ids_key); if (GES_IS_CLIP (child)) { GESLayer *layer = ges_clip_get_layer (GES_CLIP (child)); signals_ids->child_clip_changed_layer_sid = g_signal_connect (child, "notify::layer", (GCallback) _child_clip_changed_layer_cb, group); if (layer) { signals_ids->child_priority_changed_sid = g_signal_connect (layer, "notify::priority", (GCallback) _child_priority_changed_cb, child); } signals_ids->layer = layer; } else if (GES_IS_GROUP (child), group) { signals_ids->child_group_priority_changed_sid = g_signal_connect (child, "notify::priority", (GCallback) _child_group_priority_changed, group); } } static void _disconnect_signals (GESGroup * group, GESTimelineElement * child, ChildSignalIds * sigids) { if (sigids->child_group_priority_changed_sid) { g_signal_handler_disconnect (child, sigids->child_group_priority_changed_sid); sigids->child_group_priority_changed_sid = 0; } if (sigids->child_clip_changed_layer_sid) { g_signal_handler_disconnect (child, sigids->child_clip_changed_layer_sid); sigids->child_clip_changed_layer_sid = 0; } if (sigids->child_priority_changed_sid) { g_signal_handler_disconnect (sigids->layer, sigids->child_priority_changed_sid); sigids->child_priority_changed_sid = 0; } } static void _child_removed (GESContainer * group, GESTimelineElement * child) { GList *children; GstClockTime first_child_start; gchar *signals_ids_key; ChildSignalIds *sigids; GESGroupPrivate *priv = GES_GROUP (group)->priv; _ges_container_sort_children (group); children = GES_CONTAINER_CHILDREN (group); signals_ids_key = g_strdup_printf (GES_GROUP_SIGNALS_IDS_DATA_KEY_FORMAT, child); sigids = g_object_get_data (G_OBJECT (group), signals_ids_key); _disconnect_signals (GES_GROUP (group), child, sigids); g_free (signals_ids_key); if (children == NULL) { GST_FIXME_OBJECT (group, "Auto destroy myself?"); if (GES_TIMELINE_ELEMENT_TIMELINE (group)) timeline_remove_group (GES_TIMELINE_ELEMENT_TIMELINE (group), GES_GROUP (group)); return; } priv->setting_value = TRUE; first_child_start = GES_TIMELINE_ELEMENT_START (children->data); if (first_child_start > GES_TIMELINE_ELEMENT_START (group)) { group->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES; _set_start0 (GES_TIMELINE_ELEMENT (group), first_child_start); group->children_control_mode = GES_CHILDREN_UPDATE; } priv->setting_value = FALSE; } static GList * _ungroup (GESContainer * group, gboolean recursive) { GPtrArray *children_array; GESTimeline *timeline; GList *children, *tmp, *ret = NULL; /* We choose 16 just as an arbitrary value */ children_array = g_ptr_array_sized_new (16); timeline = GES_TIMELINE_ELEMENT_TIMELINE (group); children = ges_container_get_children (group, FALSE); for (tmp = children; tmp; tmp = tmp->next) { GESTimelineElement *child = tmp->data; gst_object_ref (child); ges_container_remove (group, child); g_ptr_array_add (children_array, child); ret = g_list_append (ret, child); } if (timeline) timeline_emit_group_removed (timeline, (GESGroup *) group, children_array); g_ptr_array_free (children_array, TRUE); g_list_free_full (children, gst_object_unref); /* No need to remove from the timeline here, this will be done in _child_removed */ return ret; } static GESContainer * _group (GList * containers) { GList *tmp; GESTimeline *timeline = NULL; GESContainer *ret = g_object_new (GES_TYPE_GROUP, NULL); if (!containers) return ret; for (tmp = containers; tmp; tmp = tmp->next) { if (!timeline) { timeline = GES_TIMELINE_ELEMENT_TIMELINE (tmp->data); } else if (timeline != GES_TIMELINE_ELEMENT_TIMELINE (tmp->data)) { g_object_unref (ret); return NULL; } ges_container_add (ret, tmp->data); } /* No need to add to the timeline here, this will be done in _child_added */ return ret; } static GESTimelineElement * _paste (GESTimelineElement * element, GESTimelineElement * ref, GstClockTime paste_position) { GESTimelineElement *ngroup = GES_TIMELINE_ELEMENT_CLASS (parent_class)->paste (element, ref, paste_position); if (ngroup) { if (GES_CONTAINER_CHILDREN (ngroup)) { timeline_add_group (GES_TIMELINE_ELEMENT_TIMELINE (GES_CONTAINER_CHILDREN (ngroup)->data), GES_GROUP (element)); timeline_emit_group_added (GES_TIMELINE_ELEMENT_TIMELINE (GES_CONTAINER_CHILDREN (ngroup)->data), GES_GROUP (element)); } } return ngroup; } /**************************************************** * * * GObject virtual methods implementation * * * ****************************************************/ static void ges_group_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec) { GESTimelineElement *self = GES_TIMELINE_ELEMENT (object); switch (property_id) { case PROP_START: g_value_set_uint64 (value, self->start); break; case PROP_INPOINT: g_value_set_uint64 (value, self->inpoint); break; case PROP_DURATION: g_value_set_uint64 (value, self->duration); break; case PROP_MAX_DURATION: g_value_set_uint64 (value, self->maxduration); break; case PROP_PRIORITY: g_value_set_uint (value, self->priority); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (self, property_id, pspec); } } static void ges_group_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { GESTimelineElement *self = GES_TIMELINE_ELEMENT (object); switch (property_id) { case PROP_START: ges_timeline_element_set_start (self, g_value_get_uint64 (value)); break; case PROP_INPOINT: ges_timeline_element_set_inpoint (self, g_value_get_uint64 (value)); break; case PROP_DURATION: ges_timeline_element_set_duration (self, g_value_get_uint64 (value)); break; case PROP_PRIORITY: ges_timeline_element_set_priority (self, g_value_get_uint (value)); break; case PROP_MAX_DURATION: ges_timeline_element_set_max_duration (self, g_value_get_uint64 (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (self, property_id, pspec); } } static void ges_group_class_init (GESGroupClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GESContainerClass *container_class = GES_CONTAINER_CLASS (klass); GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass); object_class->get_property = ges_group_get_property; object_class->set_property = ges_group_set_property; element_class->trim = _trim; element_class->set_duration = _set_duration; element_class->set_inpoint = _set_inpoint; element_class->set_start = _set_start; element_class->set_priority = _set_priority; element_class->paste = _paste; /* We override start, inpoint, duration and max-duration from GESTimelineElement * in order to makes sure those fields are not serialized. */ /** * GESGroup:start: * * The position of the object in its container (in nanoseconds). */ properties[PROP_START] = g_param_spec_uint64 ("start", "Start", "The position in the container", 0, G_MAXUINT64, 0, G_PARAM_READWRITE | GES_PARAM_NO_SERIALIZATION); /** * GESGroup:in-point: * * The in-point at which this #GESGroup will start outputting data * from its contents (in nanoseconds). * * Ex : an in-point of 5 seconds means that the first outputted buffer will * be the one located 5 seconds in the controlled resource. */ properties[PROP_INPOINT] = g_param_spec_uint64 ("in-point", "In-point", "The in-point", 0, G_MAXUINT64, 0, G_PARAM_READWRITE | GES_PARAM_NO_SERIALIZATION); /** * GESGroup:duration: * * The duration (in nanoseconds) which will be used in the container */ properties[PROP_DURATION] = g_param_spec_uint64 ("duration", "Duration", "The duration to use", 0, G_MAXUINT64, GST_CLOCK_TIME_NONE, G_PARAM_READWRITE | GES_PARAM_NO_SERIALIZATION); /** * GESGroup:max-duration: * * The maximum duration (in nanoseconds) of the #GESGroup. */ properties[PROP_MAX_DURATION] = g_param_spec_uint64 ("max-duration", "Maximum duration", "The maximum duration of the object", 0, G_MAXUINT64, GST_CLOCK_TIME_NONE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | GES_PARAM_NO_SERIALIZATION); /** * GESTGroup:priority: * * The priority of the object. */ properties[PROP_PRIORITY] = g_param_spec_uint ("priority", "Priority", "The priority of the object", 0, G_MAXUINT, 0, G_PARAM_READWRITE | GES_PARAM_NO_SERIALIZATION); g_object_class_install_properties (object_class, PROP_LAST, properties); container_class->add_child = _add_child; container_class->child_added = _child_added; container_class->child_removed = _child_removed; container_class->ungroup = _ungroup; container_class->group = _group; container_class->grouping_priority = 0; } static void ges_group_init (GESGroup * self) { self->priv = ges_group_get_instance_private (self); self->priv->setting_value = FALSE; } /**************************************************** * * * API implementation * * * ****************************************************/ /** * ges_group_new: * * Created a new empty #GESGroup, if you want to group several container * together, it is recommanded to use the #ges_container_group method so the * proper subclass is selected. * * Returns: (transfer floating): The new empty group. */ GESGroup * ges_group_new (void) { return g_object_new (GES_TYPE_GROUP, NULL); }