/* GStreamer Editing Services * Copyright (C) 2009 Edward Hervey * 2009 Nokia Corporation * 2012 Collabora Ltd. * Author: Sebastian Dröge * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:gesclip * @title: GESClip * @short_description: Base class for elements that occupy a single * #GESLayer and maintain equal timings of their children * * #GESClip-s are the core objects of a #GESLayer. Each clip may exist in * a single layer but may control several #GESTrackElement-s that span * several #GESTrack-s. A clip will ensure that all its children share the * same #GESTimelineElement:start and #GESTimelineElement:duration in * their tracks, which will match the #GESTimelineElement:start and * #GESTimelineElement:duration of the clip itself. Therefore, changing * the timing of the clip will change the timing of the children, and a * change in the timing of a child will change the timing of the clip and * subsequently all its siblings. As such, a clip can be treated as a * singular object in its layer. * * For most uses of a #GESTimeline, it is often sufficient to only * interact with #GESClip-s directly, which will take care of creating and * organising the elements of the timeline's tracks. * * Most subclassed clips will be associated with some *core* * #GESTrackElement-s. When such a clip is added to a layer in a timeline, * it will create these children and they will be added to the timeline's * tracks. You can connect to the #GESContainer::child-added signal to be * notified of their creation. If a clip will produce several core * elements of the same #GESTrackElement:track-type but they are destined * for separate tracks, you should connect to the timeline's * #GESTimeline::select-tracks-for-object signal to coordinate which * tracks each element should land in. * * The #GESTimelineElement:in-point of the clip will control the * #GESTimelineElement:in-point of these core elements to be the same * value if their #GESTrackElement:has-internal-source is set to %TRUE. * * The #GESTimelineElement:max-duration of the clip is the minimum * #GESTimelineElement:max-duration of its children. If you set its value * to anything other than its current value, this will also set the * #GESTimelineElement:max-duration of all its core children to the same * value if their #GESTrackElement:has-internal-source is set to %TRUE. * As a special case, whilst a clip does not yet have any core children, * its #GESTimelineElement:max-duration may be set to indicate what its * value will be once they are created. * * ## Effects * * Some subclasses (#GESSourceClip and #GESBaseEffect) may also allow * their objects to have additional non-core #GESBaseEffect-s elements as * children. These are additional effects that are applied to the output * data of the core elements. They can be added to the clip using * ges_container_add(), which will take care of adding the effect to the * timeline's tracks. The new effect will be placed between the clip's * core track elements and its other effects. As such, the newly added * effect will be applied to any source data **before** the other existing * effects. You can change the ordering of effects using * ges_clip_set_top_effect_index(). */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "ges-clip.h" #include "ges.h" #include "ges-internal.h" #include static GList *ges_clip_create_track_elements_func (GESClip * clip, GESTrackType type); static gboolean _ripple (GESTimelineElement * element, GstClockTime start); static gboolean _ripple_end (GESTimelineElement * element, GstClockTime end); static gboolean _roll_start (GESTimelineElement * element, GstClockTime start); static gboolean _roll_end (GESTimelineElement * element, GstClockTime end); static gboolean _trim (GESTimelineElement * element, GstClockTime start); static void _compute_height (GESContainer * container); struct _GESClipPrivate { /*< public > */ GESLayer *layer; /*< private > */ guint nb_effects; GList *copied_track_elements; GESLayer *copied_layer; GESTimeline *copied_timeline; gboolean prevent_priority_offset_update; gboolean prevent_resort; gboolean updating_max_duration; gboolean prevent_max_duration_update; gboolean setting_inpoint; gboolean allow_any_track; /* The formats supported by this Clip */ GESTrackType supportedformats; }; enum { PROP_0, PROP_LAYER, PROP_SUPPORTED_FORMATS, PROP_LAST }; static GParamSpec *properties[PROP_LAST]; static void ges_extractable_interface_init (GESExtractableInterface * iface) { iface->asset_type = GES_TYPE_CLIP_ASSET; } G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GESClip, ges_clip, GES_TYPE_CONTAINER, G_ADD_PRIVATE (GESClip) G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init)); /**************************************************** * Listen to our children * ****************************************************/ #define _IS_CORE_CHILD(child) GES_TRACK_ELEMENT_IS_CORE(child) #define _IS_TOP_EFFECT(child) \ (!_IS_CORE_CHILD (child) && GES_IS_BASE_EFFECT (child)) #define _IS_CORE_INTERNAL_SOURCE_CHILD(child) \ (_IS_CORE_CHILD (child) \ && ges_track_element_has_internal_source (GES_TRACK_ELEMENT (child))) /* @min_priority: The absolute minimum priority a child of @container should have * @max_priority: The absolute maximum priority a child of @container should have */ static void _get_priority_range_full (GESContainer * container, guint32 * min_priority, guint32 * max_priority, guint32 priority_base) { GESLayer *layer = GES_CLIP (container)->priv->layer; if (layer) { *min_priority = priority_base + layer->min_nle_priority; *max_priority = layer->max_nle_priority; } else { *min_priority = priority_base + MIN_NLE_PRIO; *max_priority = G_MAXUINT32; } } static void _get_priority_range (GESContainer * container, guint32 * min_priority, guint32 * max_priority) { _get_priority_range_full (container, min_priority, max_priority, _PRIORITY (container)); } static void _child_priority_changed_cb (GESTimelineElement * child, GParamSpec * arg G_GNUC_UNUSED, GESContainer * container) { /* we do not change the rest of the clip in response to a change in * the child priority */ guint32 min_prio, max_prio; GESClipPrivate *priv = GES_CLIP (container)->priv; GST_DEBUG_OBJECT (container, "TimelineElement %" GES_FORMAT " priority changed to %u", GES_ARGS (child), _PRIORITY (child)); if (!priv->prevent_priority_offset_update) { /* Update mapping */ _get_priority_range (container, &min_prio, &max_prio); _ges_container_set_priority_offset (container, child, min_prio - _PRIORITY (child)); } if (!priv->prevent_resort) { _ges_container_sort_children (container); _compute_height (container); } } static void _child_inpoint_changed_cb (GESTimelineElement * child, GParamSpec * pspec, GESContainer * container) { if (GES_CLIP (container)->priv->setting_inpoint) return; /* ignore non-core */ /* if the track element has no internal content, then this means its * in-point has been set (back) to 0, we can ignore this update */ if (!_IS_CORE_INTERNAL_SOURCE_CHILD (child)) return; /* If the child->inpoint is the same as our own, set_inpoint will do * nothing. For example, when we set them in add_child (the notifies for * this are released after child_added is called because * ges_container_add freezes them) */ _set_inpoint0 (GES_TIMELINE_ELEMENT (container), child->inpoint); } /* called when a child is added, removed or their max-duration changes */ static void _update_max_duration (GESContainer * container) { GList *tmp; GstClockTime min = GST_CLOCK_TIME_NONE; GESClipPrivate *priv = GES_CLIP (container)->priv; if (priv->prevent_max_duration_update) return; for (tmp = container->children; tmp; tmp = tmp->next) { GESTimelineElement *child = tmp->data; if (_IS_CORE_CHILD (child) && GST_CLOCK_TIME_IS_VALID (child->maxduration)) min = GST_CLOCK_TIME_IS_VALID (min) ? MIN (min, child->maxduration) : child->maxduration; } priv->updating_max_duration = TRUE; ges_timeline_element_set_max_duration (GES_TIMELINE_ELEMENT (container), min); priv->updating_max_duration = FALSE; } static void _child_max_duration_changed_cb (GESTimelineElement * child, GParamSpec * pspec, GESContainer * container) { /* ignore non-core */ if (!_IS_CORE_CHILD (child)) return; _update_max_duration (container); } static void _child_has_internal_source_changed_cb (GESTimelineElement * child, GParamSpec * pspec, GESContainer * container) { /* ignore non-core */ /* if the track element is now registered to have no internal content, * we don't have to do anything */ if (!_IS_CORE_INTERNAL_SOURCE_CHILD (child)) return; /* otherwise, we need to make its in-point match ours */ _set_inpoint0 (child, _INPOINT (container)); } /**************************************************** * Restrict our children * ****************************************************/ static gboolean _track_contains_core (GESClip * clip, GESTrack * track, gboolean core) { GList *tmp; for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) { GESTrackElement *child = tmp->data; if (_IS_CORE_CHILD (child) == core && ges_track_element_get_track (child) == track) return TRUE; } return FALSE; } gboolean ges_clip_can_set_track_of_child (GESClip * clip, GESTrackElement * child, GESTrack * track) { GESTrack *current_track = ges_track_element_get_track (child); if (clip->priv->allow_any_track) return TRUE; if (current_track == track) return TRUE; if (current_track) { /* can not remove a core element from a track if a non-core one sits * above it */ if (_IS_CORE_CHILD (child) && _track_contains_core (clip, current_track, FALSE)) { GST_INFO_OBJECT (clip, "Cannot move the core child %" GES_FORMAT " to the track %" GST_PTR_FORMAT " because it has non-core " "siblings above it in its current track %" GST_PTR_FORMAT, GES_ARGS (child), track, current_track); return FALSE; } /* otherwise can remove */ } if (track) { GESTimeline *clip_timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip); const GESTimeline *track_timeline = ges_track_get_timeline (track); if (track_timeline == NULL) { GST_INFO_OBJECT (clip, "Cannot move the child %" GES_FORMAT " to the track %" GST_PTR_FORMAT " because it is not part " "of a timeline", GES_ARGS (child), track); return FALSE; } if (track_timeline != clip_timeline) { GST_INFO_OBJECT (clip, "Cannot move the child %" GES_FORMAT " to the track %" GST_PTR_FORMAT " because its timeline %" GST_PTR_FORMAT " does not match the clip's timeline %" GST_PTR_FORMAT, GES_ARGS (child), track, track_timeline, clip_timeline); return FALSE; } /* one core child per track, and other children (effects) can only be * placed in a track that already has a core child */ if (_IS_CORE_CHILD (child)) { if (_track_contains_core (clip, track, TRUE)) { GST_INFO_OBJECT (clip, "Cannot move the core child %" GES_FORMAT " to the track %" GST_PTR_FORMAT " because it contains a " "core sibling", GES_ARGS (child), track); return FALSE; } } else { if (!_track_contains_core (clip, track, TRUE)) { GST_INFO_OBJECT (clip, "Cannot move the non-core child %" GES_FORMAT " to the track %" GST_PTR_FORMAT " because it " " does not contain a core sibling", GES_ARGS (child), track); return FALSE; } } } return TRUE; } /***************************************************** * * * GESTimelineElement virtual methods implementation * * * *****************************************************/ static gboolean _set_start (GESTimelineElement * element, GstClockTime start) { GList *tmp, *children; GESContainer *container = GES_CONTAINER (element); GST_DEBUG_OBJECT (element, "Setting children start, (initiated_move: %" GST_PTR_FORMAT ")", container->initiated_move); /* get copy of children, since GESContainer may resort the clip */ children = ges_container_get_children (container, FALSE); container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES; for (tmp = children; tmp; tmp = g_list_next (tmp)) { GESTimelineElement *child = (GESTimelineElement *) tmp->data; if (child != container->initiated_move) _set_start0 (GES_TIMELINE_ELEMENT (child), start); } container->children_control_mode = GES_CHILDREN_UPDATE; g_list_free_full (children, gst_object_unref); return TRUE; } /* Whether @clip can have its in-point set to @inpoint because none of * its children have a max-duration below it */ gboolean ges_clip_can_set_inpoint_of_child (GESClip * clip, GESTimelineElement * child, GstClockTime inpoint) { GList *tmp; /* don't bother checking if we are setting the value */ if (clip->priv->setting_inpoint) return TRUE; /* non-core children do not effect our in-point */ if (!_IS_CORE_CHILD (child)) return TRUE; for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) { GESTimelineElement *child = tmp->data; if (_IS_CORE_INTERNAL_SOURCE_CHILD (child) && GST_CLOCK_TIME_IS_VALID (child->maxduration) && child->maxduration < inpoint) return FALSE; } return TRUE; } /* returns TRUE if we did not break early */ static gboolean _set_childrens_inpoint (GESTimelineElement * element, GstClockTime inpoint, gboolean break_on_failure) { GList *tmp; GESClipPrivate *priv = GES_CLIP (element)->priv; priv->setting_inpoint = TRUE; for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) { GESTimelineElement *child = tmp->data; if (_IS_CORE_INTERNAL_SOURCE_CHILD (child)) { if (!_set_inpoint0 (child, inpoint)) { GST_ERROR_OBJECT ("Could not set the in-point of child %" GES_FORMAT " to %" GST_TIME_FORMAT, GES_ARGS (child), GST_TIME_ARGS (inpoint)); if (break_on_failure) return FALSE; } } } priv->setting_inpoint = FALSE; return TRUE; } static gboolean _set_inpoint (GESTimelineElement * element, GstClockTime inpoint) { if (!_set_childrens_inpoint (element, inpoint, TRUE)) { _set_childrens_inpoint (element, element->inpoint, FALSE); return FALSE; } return TRUE; } static gboolean _set_duration (GESTimelineElement * element, GstClockTime duration) { GList *tmp, *children; GESContainer *container = GES_CONTAINER (element); /* get copy of children, since GESContainer may resort the clip */ children = ges_container_get_children (container, FALSE); container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES; for (tmp = container->children; tmp; tmp = g_list_next (tmp)) { GESTimelineElement *child = (GESTimelineElement *) tmp->data; if (child != container->initiated_move) { ELEMENT_SET_FLAG (child, GES_TIMELINE_ELEMENT_SET_SIMPLE); _set_duration0 (GES_TIMELINE_ELEMENT (child), duration); ELEMENT_UNSET_FLAG (child, GES_TIMELINE_ELEMENT_SET_SIMPLE); } } container->children_control_mode = GES_CHILDREN_UPDATE; g_list_free_full (children, gst_object_unref); return TRUE; } static gboolean _set_max_duration (GESTimelineElement * element, GstClockTime maxduration) { GList *tmp; GESClipPrivate *priv = GES_CLIP (element)->priv; GstClockTime new_min = GST_CLOCK_TIME_NONE; gboolean has_core = FALSE; /* if we are setting based on a change in the minimum */ if (priv->updating_max_duration) return TRUE; /* else, we set every core child to have the same max duration */ priv->prevent_max_duration_update = TRUE; for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) { GESTimelineElement *child = tmp->data; if (_IS_CORE_CHILD (child)) { has_core = TRUE; if (ges_track_element_has_internal_source (GES_TRACK_ELEMENT (child))) { if (!ges_timeline_element_set_max_duration (child, maxduration)) GST_ERROR_OBJECT ("Could not set the max-duration of child %" GES_FORMAT " to %" GST_TIME_FORMAT, GES_ARGS (child), GST_TIME_ARGS (maxduration)); if (GST_CLOCK_TIME_IS_VALID (child->maxduration)) new_min = GST_CLOCK_TIME_IS_VALID (new_min) ? MIN (new_min, child->maxduration) : child->maxduration; } } } priv->prevent_max_duration_update = FALSE; if (!has_core) { /* allow max-duration to be set arbitrarily when we have no * core children, even though there is no actual minimum max-duration * when it has no core children */ if (GST_CLOCK_TIME_IS_VALID (maxduration)) GST_INFO_OBJECT (element, "Allowing max-duration of the clip to be set to %" GST_TIME_FORMAT " because it has no core children", GST_TIME_ARGS (maxduration)); return TRUE; } if (new_min != maxduration) { if (GST_CLOCK_TIME_IS_VALID (new_min)) GST_WARNING_OBJECT (element, "Failed to set the max-duration of the " "clip to %" GST_TIME_FORMAT " because it was not possible to " "match this with the actual minimum of %" GST_TIME_FORMAT, GST_TIME_ARGS (maxduration), GST_TIME_ARGS (new_min)); else GST_WARNING_OBJECT (element, "Failed to set the max-duration of the " "clip to %" GST_TIME_FORMAT " because it has no core children " "whose max-duration could be set to anything other than " "GST_CLOCK_TIME_NONE", GST_TIME_ARGS (maxduration)); priv->updating_max_duration = TRUE; ges_timeline_element_set_max_duration (element, new_min); priv->updating_max_duration = FALSE; return FALSE; } return TRUE; } static gboolean _set_priority (GESTimelineElement * element, guint32 priority) { GESClipPrivate *priv = GES_CLIP (element)->priv; GList *tmp; guint32 min_prio, max_prio; GESContainer *container = GES_CONTAINER (element); /* send the new 'priority' to determine what the new 'min_prio' should * be for the clip */ _get_priority_range_full (container, &min_prio, &max_prio, priority); /* offsets will remain constant for the children */ priv->prevent_resort = TRUE; priv->prevent_priority_offset_update = TRUE; for (tmp = container->children; tmp; tmp = g_list_next (tmp)) { guint32 track_element_prio; GESTimelineElement *child = (GESTimelineElement *) tmp->data; gint off = _ges_container_get_priority_offset (container, child); if (off >= LAYER_HEIGHT) { GST_ERROR ("%s child %s as a priority offset %d >= LAYER_HEIGHT %d" " ==> clamping it to 0", GES_TIMELINE_ELEMENT_NAME (element), GES_TIMELINE_ELEMENT_NAME (child), off, LAYER_HEIGHT); off = 0; } /* Want the priority offset 'off' of each child to stay the same with * the new priority. The offset is calculated from * offset = min_priority - child_priority */ track_element_prio = min_prio - off; if (track_element_prio > max_prio) { GST_WARNING ("%p priority of %i, is outside of the its containing " "layer space. (%d/%d) setting it to the maximum it can be", container, priority, min_prio, max_prio); track_element_prio = max_prio; } _set_priority0 (child, track_element_prio); } /* no need to re-sort the container since we maintained the relative * offsets. As such, the height remains the same as well. */ priv->prevent_resort = FALSE; priv->prevent_priority_offset_update = FALSE; return TRUE; } static guint32 _get_layer_priority (GESTimelineElement * element) { GESClip *clip = GES_CLIP (element); if (clip->priv->layer == NULL) return GES_TIMELINE_ELEMENT_NO_LAYER_PRIORITY; return ges_layer_get_priority (clip->priv->layer); } static gboolean _get_natural_framerate (GESTimelineElement * self, gint * framerate_n, gint * framerate_d) { GESAsset *asset = ges_extractable_get_asset (GES_EXTRACTABLE (self)); if (!asset) { GST_WARNING_OBJECT (self, "No asset set?"); return FALSE; } return ges_clip_asset_get_natural_framerate (GES_CLIP_ASSET (asset), framerate_n, framerate_d); } /**************************************************** * * * GESContainer virtual methods implementation * * * ****************************************************/ static void _compute_height (GESContainer * container) { GList *tmp; guint32 min_prio = G_MAXUINT32, max_prio = 0; if (container->children == NULL) { /* FIXME Why not 0! */ _ges_container_set_height (container, 1); return; } /* Go over all childs and check if height has changed */ for (tmp = container->children; tmp; tmp = tmp->next) { guint tck_priority = _PRIORITY (tmp->data); if (tck_priority < min_prio) min_prio = tck_priority; if (tck_priority > max_prio) max_prio = tck_priority; } _ges_container_set_height (container, max_prio - min_prio + 1); } static gboolean _add_child (GESContainer * container, GESTimelineElement * element) { GESClipClass *klass = GES_CLIP_GET_CLASS (GES_CLIP (container)); guint max_prio, min_prio; GESTrack *track; GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (container); GESClipPrivate *priv = GES_CLIP (container)->priv; GESAsset *asset, *creator_asset; g_return_val_if_fail (GES_IS_TRACK_ELEMENT (element), FALSE); if (element->timeline && element->timeline != timeline) { GST_WARNING_OBJECT (container, "Cannot add %" GES_FORMAT " as a child " "because its timeline is %" GST_PTR_FORMAT " rather than the " "clip's timeline %" GST_PTR_FORMAT, GES_ARGS (element), element->timeline, timeline); return FALSE; } asset = ges_extractable_get_asset (GES_EXTRACTABLE (container)); creator_asset = ges_track_element_get_creator_asset (GES_TRACK_ELEMENT (element)); if (creator_asset && asset != creator_asset) { GST_WARNING_OBJECT (container, "Cannot add the track element %" GES_FORMAT " as a child " "because it is a core element created by another clip with a " "different asset to the current clip's asset", GES_ARGS (element)); return FALSE; } track = ges_track_element_get_track (GES_TRACK_ELEMENT (element)); if (track && ges_track_get_timeline (track) != timeline) { /* really, an element in a track should have the same timeline as * the track, so we would have checked this with the * element->timeline check. But technically a user could get around * this, so we double check here. */ GST_WARNING_OBJECT (container, "Cannot add %" GES_FORMAT " as a child " "because its track %" GST_PTR_FORMAT " is part of the timeline %" GST_PTR_FORMAT " rather than the clip's timeline %" GST_PTR_FORMAT, GES_ARGS (element), track, ges_track_get_timeline (track), timeline); return FALSE; } /* NOTE: notifies are currently frozen by ges_container_add */ _get_priority_range (container, &min_prio, &max_prio); if (creator_asset) { /* NOTE: Core track elements that are base effects are added like any * other core elements. In particular, they are *not* added to the * list of added effects, so we do not increase nb_effects. */ if (track && !priv->allow_any_track && _track_contains_core (GES_CLIP (container), track, TRUE)) { GST_WARNING_OBJECT (container, "Cannot add the core child %" GES_FORMAT " because it is in the same track %" GST_PTR_FORMAT " as an " "existing core child", GES_ARGS (element), track); return FALSE; } /* Set the core element to have the same in-point, which we don't * apply to effects */ if (ges_track_element_has_internal_source (GES_TRACK_ELEMENT (element))) { /* adding can fail if the max-duration of the element is smaller * than the current in-point of the clip */ if (!_set_inpoint0 (element, _INPOINT (container))) { GST_ERROR_OBJECT (element, "Could not set the in-point of the " "element %" GES_FORMAT " to %" GST_TIME_FORMAT ". Not adding " "as a child", GES_ARGS (element), GST_TIME_ARGS (_INPOINT (container))); return FALSE; } } /* Always add at the same priority, on top of existing effects */ _set_priority0 (element, min_prio + priv->nb_effects); } else if (GES_CLIP_CLASS_CAN_ADD_EFFECTS (klass) && _IS_TOP_EFFECT (element)) { GList *tmp; /* Add the effect at the lowest priority among effects (just after * the core elements). Need to shift the core elements up by 1 * to make room. */ if (track && !priv->allow_any_track && !_track_contains_core (GES_CLIP (container), track, TRUE)) { GST_WARNING_OBJECT (container, "Cannot add the effect %" GES_FORMAT " because its track %" GST_PTR_FORMAT " does not contain one " "of the clip's core children", GES_ARGS (element), track); return FALSE; } GST_DEBUG_OBJECT (container, "Adding %ith effect: %" GES_FORMAT " Priority %i", priv->nb_effects + 1, GES_ARGS (element), min_prio + priv->nb_effects); /* changing priorities, and updating their offset */ priv->prevent_resort = TRUE; tmp = g_list_nth (GES_CONTAINER_CHILDREN (container), priv->nb_effects); for (; tmp; tmp = tmp->next) ges_timeline_element_set_priority (GES_TIMELINE_ELEMENT (tmp->data), GES_TIMELINE_ELEMENT_PRIORITY (tmp->data) + 1); _set_priority0 (element, min_prio + priv->nb_effects); priv->nb_effects++; priv->prevent_resort = FALSE; /* no need to call _ges_container_sort_children (container) since * there is no change to the ordering yet (this happens after the * child is actually added) */ /* The height has already changed (increased by 1) */ _compute_height (container); } else { if (_IS_TOP_EFFECT (element)) GST_WARNING_OBJECT (container, "Cannot add the effect %" GES_FORMAT " because it is not a core element created by the clip itself " "and the %s class does not allow for adding extra effects", GES_ARGS (element), G_OBJECT_CLASS_NAME (klass)); else if (GES_CLIP_CLASS_CAN_ADD_EFFECTS (klass)) GST_WARNING_OBJECT (container, "Cannot add the track element %" GES_FORMAT " because it is neither a core element created by " "the clip itself, nor a GESBaseEffect", GES_ARGS (element)); else GST_WARNING_OBJECT (container, "Cannot add the track element %" GES_FORMAT " because it is not a core element created by the " "clip itself", GES_ARGS (element)); return FALSE; } _set_start0 (element, GES_TIMELINE_ELEMENT_START (container)); _set_duration0 (element, GES_TIMELINE_ELEMENT_DURATION (container)); return TRUE; } static gboolean _remove_child (GESContainer * container, GESTimelineElement * element) { GESClipPrivate *priv = GES_CLIP (container)->priv; /* NOTE: notifies are currently frozen by ges_container_add */ if (_IS_TOP_EFFECT (element)) { GList *tmp; GST_DEBUG_OBJECT (container, "Resyncing effects priority."); /* changing priorities, so preventing a re-sort */ priv->prevent_resort = TRUE; for (tmp = GES_CONTAINER_CHILDREN (container); tmp; tmp = tmp->next) { guint32 sibling_prio = GES_TIMELINE_ELEMENT_PRIORITY (tmp->data); if (sibling_prio > element->priority) ges_timeline_element_set_priority (GES_TIMELINE_ELEMENT (tmp->data), sibling_prio - 1); } priv->nb_effects--; priv->prevent_resort = FALSE; /* no need to re-sort the children since the rest keep the same * relative priorities */ /* height may have changed */ _compute_height (container); } return TRUE; } static void _child_added (GESContainer * container, GESTimelineElement * element) { g_signal_connect (element, "notify::priority", G_CALLBACK (_child_priority_changed_cb), container); g_signal_connect (element, "notify::in-point", G_CALLBACK (_child_inpoint_changed_cb), container); g_signal_connect (element, "notify::max-duration", G_CALLBACK (_child_max_duration_changed_cb), container); g_signal_connect (element, "notify::has-internal-source", G_CALLBACK (_child_has_internal_source_changed_cb), container); _child_priority_changed_cb (element, NULL, container); if (_IS_CORE_CHILD (element)) _update_max_duration (container); } static void _child_removed (GESContainer * container, GESTimelineElement * element) { g_signal_handlers_disconnect_by_func (element, _child_priority_changed_cb, container); g_signal_handlers_disconnect_by_func (element, _child_inpoint_changed_cb, container); g_signal_handlers_disconnect_by_func (element, _child_max_duration_changed_cb, container); g_signal_handlers_disconnect_by_func (element, _child_has_internal_source_changed_cb, container); if (_IS_CORE_CHILD (element)) _update_max_duration (container); } static void add_clip_to_list (gpointer key, gpointer clip, GList ** list) { *list = g_list_prepend (*list, gst_object_ref (clip)); } /* NOTE: Since this does not change the track of @child, this should * only be called if it is guaranteed that neither @from_clip nor @to_clip * will not break the track rules: * + no more than one core child per track * + every non-core child must be in the same track as a core child * NOTE: Since this does not change the creator asset of the child, this * should only be called for transferring children between clips with the * same asset. */ static void _transfer_child (GESClip * from_clip, GESClip * to_clip, GESTrackElement * child) { GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (to_clip); /* We need to bump the refcount to avoid the object to be destroyed */ gst_object_ref (child); /* don't want to change tracks */ ges_timeline_set_moving_track_elements (timeline, TRUE); ges_container_remove (GES_CONTAINER (from_clip), GES_TIMELINE_ELEMENT (child)); to_clip->priv->allow_any_track = TRUE; if (!ges_container_add (GES_CONTAINER (to_clip), GES_TIMELINE_ELEMENT (child))) GST_ERROR ("%" GES_FORMAT " could not add child %p while" " transfering, this should never happen", GES_ARGS (to_clip), child); to_clip->priv->allow_any_track = FALSE; ges_timeline_set_moving_track_elements (timeline, FALSE); gst_object_unref (child); } static GList * _ungroup (GESContainer * container, gboolean recursive) { GESClip *tmpclip; GESTrackType track_type; GESTrackElement *track_element; gboolean first_obj = TRUE; GList *tmp, *children, *ret = NULL; GESClip *clip = GES_CLIP (container); GESTimelineElement *element = GES_TIMELINE_ELEMENT (container); GESLayer *layer = clip->priv->layer; GHashTable *_tracktype_clip = g_hash_table_new (g_int_hash, g_int_equal); /* If there is no TrackElement, just return @container in a list */ if (GES_CONTAINER_CHILDREN (container) == NULL) { GST_DEBUG ("No TrackElement, simply returning"); return g_list_prepend (ret, container); } children = ges_container_get_children (container, FALSE); /* _add_child will add core elements at the lowest priority and new * non-core effects at the lowest effect priority, so we need to add * the highest priority children first to preserve the effect order. * @children is already ordered by highest priority first */ for (tmp = children; tmp; tmp = tmp->next) { track_element = GES_TRACK_ELEMENT (tmp->data); track_type = ges_track_element_get_track_type (track_element); tmpclip = g_hash_table_lookup (_tracktype_clip, &track_type); if (tmpclip == NULL) { if (G_UNLIKELY (first_obj == TRUE)) { tmpclip = clip; first_obj = FALSE; } else { tmpclip = GES_CLIP (ges_timeline_element_copy (element, FALSE)); if (layer) { /* Add new container to the same layer as @container */ ges_clip_set_moving_from_layer (tmpclip, TRUE); /* adding to the same layer should not fail when moving */ ges_layer_add_clip (layer, tmpclip); ges_clip_set_moving_from_layer (tmpclip, FALSE); } } g_hash_table_insert (_tracktype_clip, &track_type, tmpclip); ges_clip_set_supported_formats (tmpclip, track_type); } /* Move trackelement to the container it is supposed to land into */ /* Note: it is safe to transfer the element whilst not changing tracks * because all track elements in the same track will stay in the * same clip */ if (tmpclip != clip) _transfer_child (clip, tmpclip, track_element); } g_list_free_full (children, gst_object_unref); g_hash_table_foreach (_tracktype_clip, (GHFunc) add_clip_to_list, &ret); g_hash_table_unref (_tracktype_clip); return ret; } static gboolean _group_test_share_track (GESClip * clip1, GESClip * clip2) { GList *tmp1, *tmp2; GESTrackElement *child1, *child2; for (tmp1 = GES_CONTAINER_CHILDREN (clip1); tmp1; tmp1 = tmp1->next) { child1 = tmp1->data; for (tmp2 = GES_CONTAINER_CHILDREN (clip2); tmp2; tmp2 = tmp2->next) { child2 = tmp2->data; if (ges_track_element_get_track (child1) == ges_track_element_get_track (child2)) { GST_INFO_OBJECT (clip1, "Cannot group with clip %" GES_FORMAT " because its child %" GES_FORMAT " shares the same " "track with our child %" GES_FORMAT, GES_ARGS (clip2), GES_ARGS (child2), GES_ARGS (child1)); return TRUE; } } } return FALSE; } #define _GROUP_TEST_EQUAL(val, expect, format) \ if (val != expect) { \ GST_INFO_OBJECT (clip, "Cannot group with other clip %" GES_FORMAT \ " because the clip's " #expect " is %" format " rather than the " \ #expect " of the other clip %" format, GES_ARGS (first_clip), val, \ expect); \ return NULL; \ } static GESContainer * _group (GList * containers) { GESClip *first_clip = NULL; GESTimeline *timeline; GESTrackType supported_formats; GESLayer *layer; GList *tmp, *tmp2, *tmpclip; GstClockTime start, inpoint, duration; GESTimelineElement *element; GESAsset *asset; GESContainer *ret = NULL; if (!containers) return NULL; for (tmp = containers; tmp; tmp = tmp->next) { if (GES_IS_CLIP (tmp->data) == FALSE) { GST_DEBUG ("Can only work with clips"); return NULL; } if (!first_clip) { first_clip = tmp->data; element = GES_TIMELINE_ELEMENT (first_clip); start = element->start; inpoint = element->inpoint; duration = element->duration; timeline = element->timeline; layer = first_clip->priv->layer; asset = ges_extractable_get_asset (GES_EXTRACTABLE (first_clip)); } } for (tmp = containers; tmp; tmp = tmp->next) { GESClip *clip; GESAsset *cmp_asset; element = GES_TIMELINE_ELEMENT (tmp->data); clip = GES_CLIP (element); _GROUP_TEST_EQUAL (element->start, start, G_GUINT64_FORMAT); _GROUP_TEST_EQUAL (element->duration, duration, G_GUINT64_FORMAT); _GROUP_TEST_EQUAL (element->inpoint, inpoint, G_GUINT64_FORMAT); _GROUP_TEST_EQUAL (element->timeline, timeline, GST_PTR_FORMAT); _GROUP_TEST_EQUAL (clip->priv->layer, layer, GST_PTR_FORMAT); cmp_asset = ges_extractable_get_asset (GES_EXTRACTABLE (clip)); if (cmp_asset != asset) { GST_INFO_OBJECT (clip, "Cannot group with other clip %" GES_FORMAT " because the clip's asset is %s rather than " " the asset of the other clip %s", GES_ARGS (first_clip), cmp_asset ? ges_asset_get_id (cmp_asset) : NULL, asset ? ges_asset_get_id (asset) : NULL); return NULL; } /* make sure we don't share the same track */ for (tmp2 = tmp->next; tmp2; tmp2 = tmp2->next) { if (_group_test_share_track (clip, tmp2->data)) return NULL; } } /* And now pass all TrackElements to the first clip, * and remove others from the layer (updating the supported formats) */ ret = containers->data; supported_formats = GES_CLIP (ret)->priv->supportedformats; for (tmpclip = containers->next; tmpclip; tmpclip = tmpclip->next) { GESClip *cclip = tmpclip->data; GList *children = ges_container_get_children (GES_CONTAINER (cclip), FALSE); /* _add_child will add core elements at the lowest priority and new * non-core effects at the lowest effect priority, so we need to add * the highest priority children first to preserve the effect order. * @children is already ordered by highest priority first. * Priorities between children in different tracks (as tmpclips are) * is not important */ for (tmp = children; tmp; tmp = tmp->next) { GESTrackElement *celement = GES_TRACK_ELEMENT (tmp->data); /* Note: it is safe to transfer the element whilst not changing * tracks because the elements from different clips will have * children in separate tracks. So it should not be possible for * two core children to appear in the same track */ _transfer_child (cclip, GES_CLIP (ret), celement); supported_formats |= ges_track_element_get_track_type (celement); } g_list_free_full (children, gst_object_unref); ges_layer_remove_clip (layer, cclip); } ges_clip_set_supported_formats (GES_CLIP (ret), supported_formats); return ret; } void ges_clip_empty_from_track (GESClip * clip, GESTrack * track) { GList *tmp; if (track == NULL) return; /* allow us to remove in any order */ clip->priv->allow_any_track = TRUE; for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) { GESTrackElement *child = tmp->data; if (ges_track_element_get_track (child) == track) { if (!ges_track_remove_element (track, child)) GST_ERROR_OBJECT (clip, "Failed to remove child %" GES_FORMAT " from the track %" GST_PTR_FORMAT, GES_ARGS (child), track); } } clip->priv->allow_any_track = FALSE; } static GESTrackElement * _copy_track_element_to (GESTrackElement * orig, GESClip * to_clip, GstClockTime position) { GESTrackElement *copy; GESTimelineElement *el_copy, *el_orig; /* NOTE: we do not deep copy the track element, we instead call * ges_track_element_copy_properties explicitly, which is the * deep_copy for the GESTrackElementClass. */ el_orig = GES_TIMELINE_ELEMENT (orig); el_copy = ges_timeline_element_copy (el_orig, FALSE); if (el_copy == NULL) return NULL; copy = GES_TRACK_ELEMENT (el_copy); ges_track_element_copy_properties (el_orig, el_copy); /* NOTE: control bindings that are not registered in GES are not * handled */ ges_track_element_copy_bindings (orig, copy, position); ges_track_element_set_creator_asset (copy, ges_track_element_get_creator_asset (orig)); return copy; } static GESTrackElement * ges_clip_copy_track_element_into (GESClip * clip, GESTrackElement * orig, GstClockTime position) { GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip); GESTrackElement *copy; copy = _copy_track_element_to (orig, clip, position); if (copy == NULL) { GST_ERROR_OBJECT (clip, "Failed to create a copy of the " "element %" GES_FORMAT " for the clip", GES_ARGS (orig)); return NULL; } gst_object_ref (copy); ges_timeline_set_moving_track_elements (timeline, TRUE); if (!ges_container_add (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (copy))) { GST_ERROR_OBJECT (clip, "Failed to add the copied child track " "element %" GES_FORMAT " to the clip", GES_ARGS (copy)); ges_timeline_set_moving_track_elements (timeline, FALSE); gst_object_unref (copy); return NULL; } ges_timeline_set_moving_track_elements (timeline, FALSE); /* now owned by the clip */ gst_object_unref (copy); return copy; } static void _deep_copy (GESTimelineElement * element, GESTimelineElement * copy) { GList *tmp; GESClip *self = GES_CLIP (element), *ccopy = GES_CLIP (copy); GESTrackElement *el, *el_copy; /* NOTE: this should only be called on a newly created @copy, so * its copied_track_elements, and copied_layer, should be free to set * without disposing of the previous values */ for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) { el = GES_TRACK_ELEMENT (tmp->data); el_copy = _copy_track_element_to (el, ccopy, GST_CLOCK_TIME_NONE); if (!el_copy) { GST_ERROR_OBJECT (element, "Failed to copy the track element %" GES_FORMAT " for pasting", GES_ARGS (el)); continue; } /* owned by copied_track_elements */ gst_object_ref_sink (el_copy); /* _add_child will add core elements at the lowest priority and new * non-core effects at the lowest effect priority, so we need to add * the highest priority children first to preserve the effect order. * The clip's children are already ordered by highest priority first. * So we order copied_track_elements in the same way */ ccopy->priv->copied_track_elements = g_list_append (ccopy->priv->copied_track_elements, el_copy); } ccopy->priv->copied_layer = g_object_ref (self->priv->layer); ccopy->priv->copied_timeline = self->priv->layer->timeline; } static GESTimelineElement * _paste (GESTimelineElement * element, GESTimelineElement * ref, GstClockTime paste_position) { GList *tmp; GESClip *self = GES_CLIP (element); GESLayer *layer = self->priv->copied_layer; GESClip *nclip = GES_CLIP (ges_timeline_element_copy (element, FALSE)); ges_timeline_element_set_start (GES_TIMELINE_ELEMENT (nclip), paste_position); /* paste in order of priority (highest first) */ for (tmp = self->priv->copied_track_elements; tmp; tmp = tmp->next) ges_clip_copy_track_element_into (nclip, tmp->data, GST_CLOCK_TIME_NONE); if (layer) { if (layer->timeline != self->priv->copied_timeline) { GST_WARNING_OBJECT (self, "Cannot be pasted into the layer %" GST_PTR_FORMAT " because its timeline has changed", layer); gst_object_ref_sink (nclip); gst_object_unref (nclip); return NULL; } /* adding the clip to the layer will add it to the tracks, but not * necessarily the same ones depending on select-tracks-for-object */ if (!ges_layer_add_clip (layer, nclip)) { GST_INFO ("%" GES_FORMAT " could not be pasted to %" GST_TIME_FORMAT, GES_ARGS (element), GST_TIME_ARGS (paste_position)); return NULL; } } /* NOTE: self should not be used and be freed after this call, so we can * leave the freeing of copied_layer and copied_track_elements to the * dispose method */ return GES_TIMELINE_ELEMENT (nclip); } static gboolean _lookup_child (GESTimelineElement * self, const gchar * prop_name, GObject ** child, GParamSpec ** pspec) { GList *tmp; if (GES_TIMELINE_ELEMENT_CLASS (ges_clip_parent_class)->lookup_child (self, prop_name, child, pspec)) return TRUE; for (tmp = GES_CONTAINER_CHILDREN (self); tmp; tmp = tmp->next) { if (ges_timeline_element_lookup_child (tmp->data, prop_name, child, pspec)) return TRUE; } return FALSE; } /**************************************************** * * * GObject virtual methods implementation * * * ****************************************************/ static void ges_clip_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec) { GESClip *clip = GES_CLIP (object); switch (property_id) { case PROP_LAYER: g_value_set_object (value, clip->priv->layer); break; case PROP_SUPPORTED_FORMATS: g_value_set_flags (value, clip->priv->supportedformats); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void ges_clip_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { GESClip *clip = GES_CLIP (object); switch (property_id) { case PROP_SUPPORTED_FORMATS: ges_clip_set_supported_formats (clip, g_value_get_flags (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void ges_clip_dispose (GObject * object) { GESClip *self = GES_CLIP (object); g_list_free_full (self->priv->copied_track_elements, gst_object_unref); self->priv->copied_track_elements = NULL; g_clear_object (&self->priv->copied_layer); G_OBJECT_CLASS (ges_clip_parent_class)->dispose (object); } static void ges_clip_class_init (GESClipClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GESContainerClass *container_class = GES_CONTAINER_CLASS (klass); GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass); object_class->get_property = ges_clip_get_property; object_class->set_property = ges_clip_set_property; object_class->dispose = ges_clip_dispose; klass->create_track_elements = ges_clip_create_track_elements_func; klass->create_track_element = NULL; /** * GESClip:supported-formats: * * The #GESTrackType-s that the clip supports, which it can create * #GESTrackElement-s for. Note that this can be a combination of * #GESTrackType flags to indicate support for several * #GESTrackElement:track-type elements. */ properties[PROP_SUPPORTED_FORMATS] = g_param_spec_flags ("supported-formats", "Supported formats", "Formats supported by the clip", GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_AUDIO | GES_TRACK_TYPE_VIDEO, G_PARAM_READWRITE | G_PARAM_CONSTRUCT); g_object_class_install_property (object_class, PROP_SUPPORTED_FORMATS, properties[PROP_SUPPORTED_FORMATS]); /** * GESClip:layer: * * The layer this clip lies in. * * If you want to connect to this property's #GObject::notify signal, * you should connect to it with g_signal_connect_after() since the * signal emission may be stopped internally. */ properties[PROP_LAYER] = g_param_spec_object ("layer", "Layer", "The GESLayer where this clip is being used.", GES_TYPE_LAYER, G_PARAM_READABLE | G_PARAM_EXPLICIT_NOTIFY); g_object_class_install_property (object_class, PROP_LAYER, properties[PROP_LAYER]); element_class->ripple = _ripple; element_class->ripple_end = _ripple_end; element_class->roll_start = _roll_start; element_class->roll_end = _roll_end; element_class->trim = _trim; element_class->set_start = _set_start; element_class->set_duration = _set_duration; element_class->set_inpoint = _set_inpoint; element_class->set_priority = _set_priority; element_class->set_max_duration = _set_max_duration; element_class->paste = _paste; element_class->deep_copy = _deep_copy; element_class->lookup_child = _lookup_child; element_class->get_layer_priority = _get_layer_priority; element_class->get_natural_framerate = _get_natural_framerate; container_class->add_child = _add_child; container_class->remove_child = _remove_child; container_class->child_removed = _child_removed; container_class->child_added = _child_added; container_class->ungroup = _ungroup; container_class->group = _group; container_class->grouping_priority = G_MAXUINT; } static void ges_clip_init (GESClip * self) { self->priv = ges_clip_get_instance_private (self); } /** * ges_clip_create_track_element: * @clip: A #GESClip * @type: The track to create an element for * * Creates the core #GESTrackElement of the clip, of the given track type. * * Returns: (transfer floating) (nullable): The element created * by @clip, or %NULL if @clip can not provide a track element for the * given @type or an error occurred. */ GESTrackElement * ges_clip_create_track_element (GESClip * clip, GESTrackType type) { GESClipClass *class; GESTrackElement *res; g_return_val_if_fail (GES_IS_CLIP (clip), NULL); GST_DEBUG_OBJECT (clip, "Creating track element for %s", ges_track_type_name (type)); if (!(type & clip->priv->supportedformats)) { GST_DEBUG_OBJECT (clip, "We don't support this track type %i", type); return NULL; } class = GES_CLIP_GET_CLASS (clip); if (G_UNLIKELY (class->create_track_element == NULL)) { GST_ERROR ("No 'create_track_element' implementation available fo type %s", G_OBJECT_TYPE_NAME (clip)); return NULL; } res = class->create_track_element (clip, type); return res; } /** * ges_clip_create_track_elements: * @clip: A #GESClip * @type: The track-type to create elements for * * Creates the core #GESTrackElement-s of the clip, of the given track * type. * * Returns: (transfer container) (element-type GESTrackElement): A list of * the #GESTrackElement-s created by @clip for the given @type, or %NULL * if no track elements are created or an error occurred. */ GList * ges_clip_create_track_elements (GESClip * clip, GESTrackType type) { GList *tmp, *ret; GESClipClass *klass; gboolean already_created = FALSE; GESAsset *asset; g_return_val_if_fail (GES_IS_CLIP (clip), NULL); if ((clip->priv->supportedformats & type) == 0) return NULL; klass = GES_CLIP_GET_CLASS (clip); if (!(klass->create_track_elements)) { GST_WARNING ("no GESClip::create_track_elements implentation"); return NULL; } GST_DEBUG_OBJECT (clip, "Creating TrackElements for type: %s", ges_track_type_name (type)); for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) { GESTrackElement *child = GES_TRACK_ELEMENT (tmp->data); if (_IS_CORE_CHILD (child) && ges_track_element_get_track_type (child) & type) { /* assume the core track elements have all been created if we find * at least one core child with the same type */ already_created = TRUE; break; } } if (already_created) return NULL; ret = klass->create_track_elements (clip, type); asset = ges_extractable_get_asset (GES_EXTRACTABLE (clip)); for (tmp = ret; tmp; tmp = tmp->next) ges_track_element_set_creator_asset (tmp->data, asset); return ret; } /* * default implementation of GESClipClass::create_track_elements */ GList * ges_clip_create_track_elements_func (GESClip * clip, GESTrackType type) { GESTrackElement *result; GST_DEBUG_OBJECT (clip, "Creating trackelement for track: %s", ges_track_type_name (type)); result = ges_clip_create_track_element (clip, type); if (!result) { GST_DEBUG ("Did not create track element"); return NULL; } return g_list_append (NULL, result); } void ges_clip_set_layer (GESClip * clip, GESLayer * layer) { if (layer == clip->priv->layer) return; clip->priv->layer = layer; GST_DEBUG ("clip:%p, layer:%p", clip, layer); /* We do not want to notify the setting of layer = NULL when * it is actually the result of a move between layer (as we know * that it will be added to another layer right after, and this * is what imports here.) */ if (!ELEMENT_FLAG_IS_SET (clip, GES_CLIP_IS_MOVING)) g_object_notify_by_pspec (G_OBJECT (clip), properties[PROP_LAYER]); } /** * ges_clip_set_moving_from_layer: * @clip: A #GESClip * @is_moving: %TRUE if you want to start moving @clip to another layer * %FALSE when you finished moving it * * Sets the clip in a moving to layer state. You might rather use the * ges_clip_move_to_layer function to move #GESClip-s * from a layer to another. **/ void ges_clip_set_moving_from_layer (GESClip * clip, gboolean is_moving) { g_return_if_fail (GES_IS_CLIP (clip)); if (is_moving) ELEMENT_SET_FLAG (clip, GES_CLIP_IS_MOVING); else ELEMENT_UNSET_FLAG (clip, GES_CLIP_IS_MOVING); } /** * ges_clip_is_moving_from_layer: * @clip: A #GESClip * * Tells you if the clip is currently moving from a layer to another. * You might rather use the ges_clip_move_to_layer function to * move #GESClip-s from a layer to another. * * Returns: %TRUE if @clip is currently moving from its current layer * %FALSE otherwize. **/ gboolean ges_clip_is_moving_from_layer (GESClip * clip) { g_return_val_if_fail (GES_IS_CLIP (clip), FALSE); return ELEMENT_FLAG_IS_SET (clip, GES_CLIP_IS_MOVING); } /** * ges_clip_move_to_layer: * @clip: A #GESClip * @layer: The new layer * * Moves a clip to a new layer. If the clip already exists in a layer, it * is first removed from its current layer before being added to the new * layer. * * Returns: %TRUE if @clip was successfully moved to @layer. */ gboolean ges_clip_move_to_layer (GESClip * clip, GESLayer * layer) { gboolean ret = FALSE; GESLayer *current_layer; GESTimeline *current_timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip); g_return_val_if_fail (GES_IS_CLIP (clip), FALSE); g_return_val_if_fail (GES_IS_LAYER (layer), FALSE); current_layer = clip->priv->layer; if (current_layer == layer) { GST_INFO_OBJECT (clip, "Already in the layer %" GST_PTR_FORMAT, layer); return TRUE; } gst_object_ref (clip); if (current_layer == NULL) { GST_DEBUG ("Not moving %p, only adding it to %p", clip, layer); ret = ges_layer_add_clip (layer, clip); goto done; } ELEMENT_SET_FLAG (clip, GES_CLIP_IS_MOVING); if (current_timeline != layer->timeline) { /* make sure we can perform the can_move_element_check in the timeline * of the layer */ GST_WARNING_OBJECT (layer, "Cannot move clip %" GES_FORMAT " into " "the layer because its timeline %" GST_PTR_FORMAT " does not " "match the timeline of the layer %" GST_PTR_FORMAT, GES_ARGS (clip), current_timeline, layer->timeline); ret = FALSE; goto done; } if (layer->timeline && !timeline_tree_can_move_element (timeline_get_tree (layer->timeline), GES_TIMELINE_ELEMENT (clip), ges_layer_get_priority (layer), GES_TIMELINE_ELEMENT_START (clip), GES_TIMELINE_ELEMENT_DURATION (clip), NULL)) { GST_INFO_OBJECT (layer, "Clip %" GES_FORMAT " can't move to layer %d", GES_ARGS (clip), ges_layer_get_priority (layer)); goto done; } GST_DEBUG_OBJECT (clip, "moving to layer %p, priority: %d", layer, ges_layer_get_priority (layer)); ret = ges_layer_remove_clip (current_layer, clip); if (!ret) { goto done; } ret = ges_layer_add_clip (layer, clip); if (ret) { g_object_notify_by_pspec (G_OBJECT (clip), properties[PROP_LAYER]); } else { /* try and move back into the original layer */ ges_layer_add_clip (current_layer, clip); } done: ELEMENT_UNSET_FLAG (clip, GES_CLIP_IS_MOVING); gst_object_unref (clip); return ret && (clip->priv->layer == layer); } /** * ges_clip_find_track_element: * @clip: A #GESClip * @track: (allow-none): The track to search in, or %NULL to search in * all tracks * @type: The type of track element to search for, or `G_TYPE_NONE` to * match any type * * Finds an element controlled by the clip. If @track is given, * then only the track elements in @track are searched for. If @type is * given, then this function searches for a track element of the given * @type. * * Note, if multiple track elements in the clip match the given criteria, * this will return the element amongst them with the highest * #GESTimelineElement:priority (numerically, the smallest). See * ges_clip_find_track_elements() if you wish to find all such elements. * * Returns: (transfer full) (nullable): The element controlled by * @clip, in @track, and of the given @type, or %NULL if no such element * could be found. */ GESTrackElement * ges_clip_find_track_element (GESClip * clip, GESTrack * track, GType type) { GList *tmp; GESTrackElement *otmp; GESTrackElement *ret = NULL; g_return_val_if_fail (GES_IS_CLIP (clip), NULL); g_return_val_if_fail (!(track == NULL && type == G_TYPE_NONE), NULL); for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = g_list_next (tmp)) { otmp = (GESTrackElement *) tmp->data; if ((type != G_TYPE_NONE) && !G_TYPE_CHECK_INSTANCE_TYPE (tmp->data, type)) continue; if ((track == NULL) || (ges_track_element_get_track (otmp) == track)) { ret = GES_TRACK_ELEMENT (tmp->data); gst_object_ref (ret); break; } } return ret; } /** * ges_clip_get_layer: * @clip: A #GESClip * * Gets the #GESClip:layer of the clip. * * Returns: (transfer full) (nullable): The layer @clip is in, or %NULL if * @clip is not in any layer. */ GESLayer * ges_clip_get_layer (GESClip * clip) { g_return_val_if_fail (GES_IS_CLIP (clip), NULL); if (clip->priv->layer != NULL) gst_object_ref (G_OBJECT (clip->priv->layer)); return clip->priv->layer; } /** * ges_clip_get_top_effects: * @clip: A #GESClip * * Gets the #GESBaseEffect-s that have been added to the clip. The * returned list is ordered by their internal index in the clip. See * ges_clip_get_top_effect_index(). * * Returns: (transfer full) (element-type GESTrackElement): A list of all * #GESBaseEffect-s that have been added to @clip. */ GList * ges_clip_get_top_effects (GESClip * clip) { GList *tmp, *ret; GESTimelineElement *child; g_return_val_if_fail (GES_IS_CLIP (clip), NULL); GST_DEBUG_OBJECT (clip, "Getting the %i top effects", clip->priv->nb_effects); ret = NULL; for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) { child = tmp->data; if (_IS_TOP_EFFECT (child)) ret = g_list_append (ret, gst_object_ref (child)); } /* list is already sorted by index because the list of children is * sorted by priority */ return ret; } static gboolean _is_added_effect (GESClip * clip, GESBaseEffect * effect) { if (GES_TIMELINE_ELEMENT_PARENT (effect) != GES_TIMELINE_ELEMENT (clip)) { GST_WARNING_OBJECT (clip, "The effect %" GES_FORMAT " doe not belong to this clip", GES_ARGS (effect)); return FALSE; } if (_IS_CORE_CHILD (effect)) { GST_WARNING_OBJECT (clip, "The effect %" GES_FORMAT " is not a top " "effect of this clip (it is a core element of the clip)", GES_ARGS (effect)); return FALSE; } return TRUE; } /** * ges_clip_get_top_effect_index: * @clip: A #GESClip * @effect: The effect we want to get the index of * * Gets the internal index of an effect in the clip. The index of effects * in a clip will run from 0 to n-1, where n is the total number of * effects. If two effects share the same #GESTrackElement:track, the * effect with the numerically lower index will be applied to the source * data **after** the other effect, i.e. output data will always flow from * a higher index effect to a lower index effect. * * Returns: The index of @effect in @clip, or -1 if something went wrong. */ gint ges_clip_get_top_effect_index (GESClip * clip, GESBaseEffect * effect) { guint max_prio, min_prio; g_return_val_if_fail (GES_IS_CLIP (clip), -1); g_return_val_if_fail (GES_IS_BASE_EFFECT (effect), -1); if (!_is_added_effect (clip, effect)) return -1; _get_priority_range (GES_CONTAINER (clip), &min_prio, &max_prio); return GES_TIMELINE_ELEMENT_PRIORITY (effect) - min_prio; } /* TODO 2.0 remove as it is Deprecated */ gint ges_clip_get_top_effect_position (GESClip * clip, GESBaseEffect * effect) { return ges_clip_get_top_effect_index (clip, effect); } /* TODO 2.0 remove as it is Deprecated */ gboolean ges_clip_set_top_effect_priority (GESClip * clip, GESBaseEffect * effect, guint newpriority) { return ges_clip_set_top_effect_index (clip, effect, newpriority); } /** * ges_clip_set_top_effect_index: * @clip: A #GESClip * @effect: An effect within @clip to move * @newindex: The index for @effect in @clip * * Set the index of an effect within the clip. See * ges_clip_get_top_effect_index(). The new index must be an existing * index of the clip. The effect is moved to the new index, and the other * effects may be shifted in index accordingly to otherwise maintain the * ordering. * * Returns: %TRUE if @effect was successfully moved to @newindex. */ gboolean ges_clip_set_top_effect_index (GESClip * clip, GESBaseEffect * effect, guint newindex) { gint inc; GList *tmp; guint current_prio, min_prio, max_prio; GESTrackElement *track_element; g_return_val_if_fail (GES_IS_CLIP (clip), FALSE); g_return_val_if_fail (GES_IS_BASE_EFFECT (effect), FALSE); if (!_is_added_effect (clip, effect)) return FALSE; track_element = GES_TRACK_ELEMENT (effect); current_prio = _PRIORITY (track_element); _get_priority_range (GES_CONTAINER (clip), &min_prio, &max_prio); newindex = newindex + min_prio; /* We don't change the priority */ if (current_prio == newindex) return TRUE; if (newindex > (clip->priv->nb_effects - 1 + min_prio)) { GST_DEBUG ("You are trying to make %p not a top effect", effect); return FALSE; } if (current_prio > clip->priv->nb_effects + min_prio) { GST_ERROR ("%p is not a top effect", effect); return FALSE; } GST_DEBUG_OBJECT (clip, "Setting top effect %" GST_PTR_FORMAT "priority: %i", effect, newindex); if (current_prio < newindex) inc = -1; else inc = +1; /* prevent a re-sort of the list whilst we are traversing it! */ clip->priv->prevent_resort = TRUE; for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) { GESTrackElement *tmpo = GES_TRACK_ELEMENT (tmp->data); guint tck_priority = _PRIORITY (tmpo); if (tmpo == track_element) continue; /* only need to change the priority for those between the new and old * index */ if ((inc == +1 && tck_priority >= newindex && tck_priority < current_prio) || (inc == -1 && tck_priority <= newindex && tck_priority > current_prio)) { _set_priority0 (GES_TIMELINE_ELEMENT (tmpo), tck_priority + inc); } } _set_priority0 (GES_TIMELINE_ELEMENT (track_element), newindex); clip->priv->prevent_resort = FALSE; _ges_container_sort_children (GES_CONTAINER (clip)); /* height should have stayed the same */ return TRUE; } /** * ges_clip_split: * @clip: The #GESClip to split * @position: The timeline position at which to perform the split * * Splits a clip at the given timeline position into two clips. The clip * must already have a #GESClip:layer. * * The original clip's #GESTimelineElement:duration is reduced such that * its end point matches the split position. Then a new clip is created in * the same layer, whose #GESTimelineElement:start matches the split * position and #GESTimelineElement:duration will be set such that its end * point matches the old end point of the original clip. Thus, the two * clips together will occupy the same positions in the timeline as the * original clip did. * * The children of the new clip will be new copies of the original clip's * children, so it will share the same sources and use the same * operations. * * The new clip will also have its #GESTimelineElement:in-point set so * that any internal data will appear in the timeline at the same time. * Thus, when the timeline is played, the playback of data should * appear the same. This may be complicated by any additional * #GESEffect-s that have been placed on the original clip that depend on * the playback time or change the data consumption rate of sources. This * method will attempt to translate these effects such that the playback * appears the same. In such complex situations, you may get a better * result if you place the clip in a separate sub #GESProject, which only * contains this clip (and its effects), and in the original layer * create two neighbouring #GESUriClip-s that reference this sub-project, * but at a different #GESTimelineElement:in-point. * * Returns: (transfer none) (nullable): The newly created clip resulting * from the splitting @clip, or %NULL if @clip can't be split. */ GESClip * ges_clip_split (GESClip * clip, guint64 position) { GList *tmp; GESClip *new_object; GstClockTime start, inpoint, duration, old_duration, new_duration; gdouble media_duration_factor; GESTimelineElement *element; GESTimeline *timeline; GHashTable *track_for_copy; g_return_val_if_fail (GES_IS_CLIP (clip), NULL); g_return_val_if_fail (clip->priv->layer, NULL); g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (position), NULL); element = GES_TIMELINE_ELEMENT (clip); timeline = element->timeline; duration = element->duration; start = element->start; inpoint = element->inpoint; if (position >= start + duration || position <= start) { GST_WARNING_OBJECT (clip, "Can not split %" GST_TIME_FORMAT " out of boundaries", GST_TIME_ARGS (position)); return NULL; } old_duration = position - start; if (timeline && !timeline_tree_can_move_element (timeline_get_tree (timeline), element, ges_timeline_element_get_layer_priority (element), start, old_duration, NULL)) { GST_WARNING_OBJECT (clip, "Can not split %" GES_FORMAT " at %" GST_TIME_FORMAT " as timeline would be in an illegal" " state.", GES_ARGS (clip), GST_TIME_ARGS (position)); return NULL; } new_duration = duration + start - position; if (timeline && !timeline_tree_can_move_element (timeline_get_tree (timeline), element, ges_timeline_element_get_layer_priority (element), position, new_duration, NULL)) { GST_WARNING_OBJECT (clip, "Can not split %" GES_FORMAT " at %" GST_TIME_FORMAT " as timeline would end up in an illegal" " state.", GES_ARGS (clip), GST_TIME_ARGS (position)); return NULL; } GST_DEBUG_OBJECT (clip, "Spliting at %" GST_TIME_FORMAT, GST_TIME_ARGS (position)); /* Create the new Clip */ new_object = GES_CLIP (ges_timeline_element_copy (element, FALSE)); GST_DEBUG_OBJECT (new_object, "New 'splitted' clip"); /* Set new timing properties on the Clip */ media_duration_factor = ges_timeline_element_get_media_duration_factor (element); _set_start0 (GES_TIMELINE_ELEMENT (new_object), position); _set_inpoint0 (GES_TIMELINE_ELEMENT (new_object), inpoint + old_duration * media_duration_factor); _set_duration0 (GES_TIMELINE_ELEMENT (new_object), new_duration); /* We do not want the timeline to create again TrackElement-s */ ges_clip_set_moving_from_layer (new_object, TRUE); /* adding to the same layer should not fail when moving */ ges_layer_add_clip (clip->priv->layer, new_object); ges_clip_set_moving_from_layer (new_object, FALSE); /* split binding before duration changes */ track_for_copy = g_hash_table_new_full (NULL, NULL, gst_object_unref, gst_object_unref); /* _add_child will add core elements at the lowest priority and new * non-core effects at the lowest effect priority, so we need to add the * highest priority children first to preserve the effect order. The * clip's children are already ordered by highest priority first. */ for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) { GESTrackElement *copy, *orig = tmp->data; GESTrack *track = ges_track_element_get_track (orig); /* FIXME: is position - start + inpoint always the correct splitting * point for control bindings? What coordinate system are control * bindings given in? */ copy = ges_clip_copy_track_element_into (new_object, orig, position - start + inpoint); if (copy && track) g_hash_table_insert (track_for_copy, gst_object_ref (copy), gst_object_ref (track)); } ELEMENT_SET_FLAG (clip, GES_TIMELINE_ELEMENT_SET_SIMPLE); _set_duration0 (GES_TIMELINE_ELEMENT (clip), old_duration); ELEMENT_UNSET_FLAG (clip, GES_TIMELINE_ELEMENT_SET_SIMPLE); g_object_notify (G_OBJECT (clip), "duration"); /* add to the track after the duration change so we don't overlap! */ for (tmp = GES_CONTAINER_CHILDREN (new_object); tmp; tmp = tmp->next) { GESTrackElement *copy = tmp->data; GESTrack *track = g_hash_table_lookup (track_for_copy, copy); if (track) { new_object->priv->allow_any_track = TRUE; ges_track_add_element (track, copy); new_object->priv->allow_any_track = FALSE; } } g_hash_table_unref (track_for_copy); return new_object; } /** * ges_clip_set_supported_formats: * @clip: A #GESClip * @supportedformats: The #GESTrackType-s supported by @clip * * Sets the #GESClip:supported-formats of the clip. This should normally * only be called by subclasses, which should be responsible for updating * its value, rather than the user. */ void ges_clip_set_supported_formats (GESClip * clip, GESTrackType supportedformats) { g_return_if_fail (GES_IS_CLIP (clip)); clip->priv->supportedformats = supportedformats; } /** * ges_clip_get_supported_formats: * @clip: A #GESClip * * Gets the #GESClip:supported-formats of the clip. * * Returns: The #GESTrackType-s supported by @clip. */ GESTrackType ges_clip_get_supported_formats (GESClip * clip) { g_return_val_if_fail (GES_IS_CLIP (clip), GES_TRACK_TYPE_UNKNOWN); return clip->priv->supportedformats; } gboolean _ripple (GESTimelineElement * element, GstClockTime start) { return ges_container_edit (GES_CONTAINER (element), NULL, ges_timeline_element_get_layer_priority (element), GES_EDIT_MODE_RIPPLE, GES_EDGE_NONE, start); } static gboolean _ripple_end (GESTimelineElement * element, GstClockTime end) { return ges_container_edit (GES_CONTAINER (element), NULL, ges_timeline_element_get_layer_priority (element), GES_EDIT_MODE_RIPPLE, GES_EDGE_END, end); } gboolean _roll_start (GESTimelineElement * element, GstClockTime start) { return ges_container_edit (GES_CONTAINER (element), NULL, ges_timeline_element_get_layer_priority (element), GES_EDIT_MODE_ROLL, GES_EDGE_START, start); } gboolean _roll_end (GESTimelineElement * element, GstClockTime end) { return ges_container_edit (GES_CONTAINER (element), NULL, ges_timeline_element_get_layer_priority (element), GES_EDIT_MODE_ROLL, GES_EDGE_END, end); } gboolean _trim (GESTimelineElement * element, GstClockTime start) { return ges_container_edit (GES_CONTAINER (element), NULL, -1, GES_EDIT_MODE_TRIM, GES_EDGE_START, start); } /** * ges_clip_add_asset: * @clip: A #GESClip * @asset: An asset with #GES_TYPE_TRACK_ELEMENT as its * #GESAsset:extractable-type * * Extracts a #GESTrackElement from an asset and adds it to the clip. * This can be used to add effects that derive from the asset to the * clip, but this method is not intended to be used to create the core * elements of the clip. * * Returns: (transfer none)(allow-none): The newly created element, or * %NULL if an error occurred. */ /* FIXME: this is not used elsewhere in the GES library */ GESTrackElement * ges_clip_add_asset (GESClip * clip, GESAsset * asset) { GESTrackElement *element; g_return_val_if_fail (GES_IS_CLIP (clip), NULL); g_return_val_if_fail (GES_IS_ASSET (asset), NULL); g_return_val_if_fail (g_type_is_a (ges_asset_get_extractable_type (asset), GES_TYPE_TRACK_ELEMENT), NULL); element = GES_TRACK_ELEMENT (ges_asset_extract (asset, NULL)); if (!ges_container_add (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (element))) return NULL; return element; } /** * ges_clip_find_track_elements: * @clip: A #GESClip * @track: (allow-none): The track to search in, or %NULL to search in * all tracks * @track_type: The track-type of the track element to search for, or * #GES_TRACK_TYPE_UNKNOWN to match any track type * @type: The type of track element to search for, or %G_TYPE_NONE to * match any type * * Finds the #GESTrackElement-s controlled by the clip that match the * given criteria. If @track is given as %NULL and @track_type is given as * #GES_TRACK_TYPE_UNKNOWN, then the search will match all elements in any * track, including those with no track, and of any * #GESTrackElement:track-type. Otherwise, if @track is not %NULL, but * @track_type is #GES_TRACK_TYPE_UNKNOWN, then only the track elements in * @track are searched for. Otherwise, if @track_type is not * #GES_TRACK_TYPE_UNKNOWN, but @track is %NULL, then only the track * elements whose #GESTrackElement:track-type matches @track_type are * searched for. Otherwise, when both are given, the track elements that * match **either** criteria are searched for. Therefore, if you wish to * only find elements in a specific track, you should give the track as * @track, but you should not give the track's #GESTrack:track-type as * @track_type because this would also select elements from other tracks * of the same type. * * You may also give @type to _further_ restrict the search to track * elements of the given @type. * * Returns: (transfer full) (element-type GESTrackElement): A list of all * the #GESTrackElement-s controlled by @clip, in @track or of the given * @track_type, and of the given @type. */ GList * ges_clip_find_track_elements (GESClip * clip, GESTrack * track, GESTrackType track_type, GType type) { GList *tmp; GESTrackElement *otmp; GList *ret = NULL; g_return_val_if_fail (GES_IS_CLIP (clip), NULL); g_return_val_if_fail (!(track == NULL && type == G_TYPE_NONE && track_type == GES_TRACK_TYPE_UNKNOWN), NULL); for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = g_list_next (tmp)) { otmp = (GESTrackElement *) tmp->data; if ((type != G_TYPE_NONE) && !G_TYPE_CHECK_INSTANCE_TYPE (tmp->data, type)) continue; /* TODO 2.0: an AND condition, using a condition like the above type * check would have made more sense here. Especially when both * track != NULL and track_type != GES_TRACK_TYPE_UNKNOWN are given */ if ((track == NULL && track_type == GES_TRACK_TYPE_UNKNOWN) || (track != NULL && ges_track_element_get_track (otmp) == track) || (track_type != GES_TRACK_TYPE_UNKNOWN && ges_track_element_get_track_type (otmp) == track_type)) ret = g_list_append (ret, gst_object_ref (otmp)); } return ret; } /** * ges_clip_get_timeline_time_from_source_frame: * @clip: A #GESClip * @frame_number: The frame number to get the corresponding timestamp in the * timeline coordinates * @err: A #GError set on errors * * This method allows you to convert a frame number into a #GstClockTime, this * can be used to either seek to a particular frame in the timeline or to later * on edit @self with that timestamp. * * This method should be use specifically in the case where you want to trim the * clip to a particular frame. * * The returned timestamp is in the global #GESTimeline time coordinates of @self, not * in the internal time coordinates. In practice, this means that you can not use * that time to set the clip #GESTimelineElement:in-point but it can be used in * the timeline editing API, for example as the @position argument of the * #ges_timeline_element_edit method. * * Note that you can get the frame timestamp of a particular clip asset with * #ges_clip_asset_get_frame_time. * * Returns: The timestamp corresponding to @frame_number in the element source * in the timeline coordinates. */ GstClockTime ges_clip_get_timeline_time_from_source_frame (GESClip * clip, GESFrameNumber frame_number, GError ** err) { GstClockTime frame_ts; GESClipAsset *asset; GstClockTimeDiff inpoint_diff; g_return_val_if_fail (GES_IS_CLIP (clip), GST_CLOCK_TIME_NONE); g_return_val_if_fail (!err || !*err, GST_CLOCK_TIME_NONE); if (!GES_FRAME_NUMBER_IS_VALID (frame_number)) return GST_CLOCK_TIME_NONE; asset = GES_CLIP_ASSET (ges_extractable_get_asset (GES_EXTRACTABLE (clip))); frame_ts = ges_clip_asset_get_frame_time (asset, frame_number); if (!GST_CLOCK_TIME_IS_VALID (frame_ts)) return GST_CLOCK_TIME_NONE; inpoint_diff = GST_CLOCK_DIFF (frame_ts, GES_TIMELINE_ELEMENT_INPOINT (clip)); if (GST_CLOCK_DIFF (inpoint_diff, _START (clip)) < 0) { g_set_error (err, GES_ERROR, GES_ERROR_INVALID_FRAME_NUMBER, "Requested frame %" G_GINT64_FORMAT " would be outside the timeline.", frame_number); return GST_CLOCK_TIME_NONE; } return GST_CLOCK_DIFF (inpoint_diff, _START (clip)); } /** * ges_clip_add_child_to_track: * @clip: A #GESClip * @child: A child of @clip * @track: The track to add @child to * @err: Return location for an error * * Adds the track element child of the clip to a specific track. * * If the given child is already in another track, this will create a copy * of the child, add it to the clip, and add this copy to the track. * * You should only call this whilst a clip is part of a #GESTimeline, and * for tracks that are in the same timeline. * * This method is an alternative to using the * #GESTimeline::select-tracks-for-object signal, but can be used to * complement it when, say, you wish to copy a clip's children from one * track into a new one. * * When the child is a core child, it must be added to a track that does * not already contain another core child of the same clip. If it is not a * core child (an additional effect), then it must be added to a track * that already contains one of the core children of the same clip. * * This method can also fail if the adding the track element to the track * would break a configuration rule of the corresponding #GESTimeline, * such as causing three sources to overlap at a single time, or causing * a source to completely overlap another in the same track. * * Note that @err will not always be set upon failure. * * Returns: (transfer none): The element that was added to @track, either * @child or a copy of child, or %NULL if the element could not be added. */ GESTrackElement * ges_clip_add_child_to_track (GESClip * clip, GESTrackElement * child, GESTrack * track, GError ** err) { GESTimeline *timeline; GESTrackElement *el; GESTrack *current_track; g_return_val_if_fail (GES_IS_CLIP (clip), NULL); g_return_val_if_fail (GES_IS_TRACK_ELEMENT (child), NULL); g_return_val_if_fail (GES_IS_TRACK (track), NULL); g_return_val_if_fail (!err || !*err, NULL); timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip); if (!g_list_find (GES_CONTAINER_CHILDREN (clip), child)) { GST_WARNING_OBJECT (clip, "The track element %" GES_FORMAT " is not " "a child of the clip", GES_ARGS (child)); return NULL; } if (!timeline) { GST_WARNING_OBJECT (clip, "Cannot add children to tracks unless " "the clip is part of a timeline"); return NULL; } if (timeline != ges_track_get_timeline (track)) { GST_WARNING_OBJECT (clip, "Cannot add the children to the track %" GST_PTR_FORMAT " because its timeline is %" GST_PTR_FORMAT " rather than that of the clip %" GST_PTR_FORMAT, track, ges_track_get_timeline (track), timeline); return NULL; } current_track = ges_track_element_get_track (child); if (current_track == track) { GST_WARNING_OBJECT (clip, "Child %s" GES_FORMAT " is already in the " "track %" GST_PTR_FORMAT, GES_ARGS (child), track); return NULL; } /* copy if the element is already in a track */ if (current_track) { el = ges_clip_copy_track_element_into (clip, child, GST_CLOCK_TIME_NONE); if (!el) { GST_ERROR_OBJECT (clip, "Could not add a copy of the track element %" GES_FORMAT " to the clip so cannot add it to the track %" GST_PTR_FORMAT, GES_ARGS (child), track); return NULL; } if (_IS_TOP_EFFECT (child)) { /* add at next lowest priority */ ges_clip_set_top_effect_index (clip, GES_BASE_EFFECT (el), ges_clip_get_top_effect_index (clip, GES_BASE_EFFECT (child)) + 1); } } else { el = child; } /* FIXME: set error if can not be added to track: * Either breaks the track rules for the clip, or the timeline * configuration rules */ if (!ges_track_add_element (track, el)) { GST_WARNING_OBJECT (clip, "Could not add the track element %" GES_FORMAT " to the track %" GST_PTR_FORMAT, GES_ARGS (el), track); if (el != child) ges_container_remove (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (el)); return NULL; } if (GES_IS_SOURCE (el)) timeline_tree_create_transitions (timeline_get_tree (timeline), ges_timeline_find_auto_transition); return el; }