gstreamer/subprojects/gst-editing-services/ges/ges-container.c

1089 lines
35 KiB
C

/* GStreamer Editing Services
* Copyright (C) <2013> Thibault Saunier <thibault.saunier@collabora.com>
* <2013> Collabora Ltd.
*
* 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:gescontainer
* @title: GESContainer
* @short_description: Base Class for elements responsible for controlling
* other #GESTimelineElement-s
*
* A #GESContainer is a timeline element that controls other
* #GESTimelineElement-s, which are its children. In particular, it is
* responsible for maintaining the relative #GESTimelineElement:start and
* #GESTimelineElement:duration times of its children. Therefore, if a
* container is temporally adjusted or moved to a new layer, it may
* accordingly adjust and move its children. Similarly, a change in one of
* its children may prompt the parent to correspondingly change its
* siblings.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-container.h"
#include "ges.h"
#include "ges-internal.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (ges_container_debug);
#undef GST_CAT_DEFAULT
#define GST_CAT_DEFAULT ges_container_debug
/* Mapping of relationship between a Container and the TimelineElements
* it controls
*
* NOTE : Does it make sense to make it public in the future ?
*/
typedef struct
{
GESTimelineElement *child;
GstClockTime start_offset;
GstClockTime duration_offset;
gulong start_notifyid;
gulong duration_notifyid;
gulong child_property_added_notifyid;
gulong child_property_removed_notifyid;
} ChildMapping;
enum
{
CHILD_ADDED_SIGNAL,
CHILD_REMOVED_SIGNAL,
LAST_SIGNAL
};
static guint ges_container_signals[LAST_SIGNAL] = { 0 };
struct _GESContainerPrivate
{
/*< public > */
GESLayer *layer;
/*< private > */
/* Set to TRUE when the container is doing updates of track object
* properties so we don't end up in infinite property update loops
*/
GHashTable *mappings;
/* List of GESTimelineElement being in the "child-added" signal
* emission stage */
GList *adding_children;
GList *copied_children;
};
enum
{
PROP_0,
PROP_HEIGHT,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GESContainer, ges_container,
GES_TYPE_TIMELINE_ELEMENT);
/************************
* Private methods *
************************/
static void
_free_mapping (ChildMapping * mapping)
{
GESTimelineElement *child = mapping->child;
/* Disconnect all notify listeners */
if (mapping->start_notifyid)
g_signal_handler_disconnect (child, mapping->start_notifyid);
if (mapping->duration_notifyid)
g_signal_handler_disconnect (child, mapping->duration_notifyid);
if (mapping->child_property_added_notifyid)
g_signal_handler_disconnect (child, mapping->child_property_added_notifyid);
if (mapping->child_property_removed_notifyid)
g_signal_handler_disconnect (child,
mapping->child_property_removed_notifyid);
if (child) {
ges_timeline_element_set_parent (child, NULL);
gst_object_unref (child);
}
g_free (mapping);
}
static gint
compare_grouping_prio (GType * a, GType * b)
{
gint ret = 0;
GObjectClass *aclass = g_type_class_ref (*a);
GObjectClass *bclass = g_type_class_ref (*b);
/* We want higher prios to be first */
if (GES_CONTAINER_CLASS (aclass)->grouping_priority <
GES_CONTAINER_CLASS (bclass)->grouping_priority)
ret = 1;
else if (GES_CONTAINER_CLASS (aclass)->grouping_priority >
GES_CONTAINER_CLASS (bclass)->grouping_priority)
ret = -1;
g_type_class_unref (aclass);
g_type_class_unref (bclass);
return ret;
}
static void
_resync_position_offsets (GESTimelineElement * child,
ChildMapping * map, GESContainer * container)
{
map->start_offset = _START (container) - _START (child);
map->duration_offset = _DURATION (container) - _DURATION (child);
}
/*****************************************************
* *
* GESTimelineElement virtual methods implementation *
* *
*****************************************************/
static gboolean
_set_start (GESTimelineElement * element, GstClockTime start)
{
GList *tmp;
ChildMapping *map;
GESContainer *container = GES_CONTAINER (element);
GESContainerPrivate *priv = container->priv;
GST_DEBUG_OBJECT (element, "Updating children offsets, (initiated_move: %"
GST_PTR_FORMAT ")", container->initiated_move);
for (tmp = container->children; tmp; tmp = g_list_next (tmp)) {
GESTimelineElement *child = (GESTimelineElement *) tmp->data;
map = g_hash_table_lookup (priv->mappings, child);
map->start_offset = start - _START (child);
}
container->children_control_mode = GES_CHILDREN_UPDATE;
return TRUE;
}
static gboolean
_set_duration (GESTimelineElement * element, GstClockTime duration)
{
GList *tmp;
GESContainer *container = GES_CONTAINER (element);
GESContainerPrivate *priv = container->priv;
for (tmp = container->children; tmp; tmp = g_list_next (tmp)) {
GESTimelineElement *child = (GESTimelineElement *) tmp->data;
ChildMapping *map = g_hash_table_lookup (priv->mappings, child);
map->duration_offset = duration - _DURATION (child);
}
return TRUE;
}
static void
_add_childs_child_property (GESTimelineElement * container_child,
GObject * prop_child, GParamSpec * property, GESContainer * container)
{
/* the container_child is kept as the owner of this child property when
* we register it on ourselves, but we use the same GObject child
* instance who the property comes from */
gboolean res =
ges_timeline_element_add_child_property_full (GES_TIMELINE_ELEMENT
(container), container_child, property, prop_child);
if (!res)
GST_INFO_OBJECT (container, "Could not register the child property '%s' "
"of our child %" GES_FORMAT " for the object %" GST_PTR_FORMAT,
property->name, GES_ARGS (container_child), prop_child);
}
static void
_ges_container_add_child_properties (GESContainer * container,
GESTimelineElement * child)
{
guint n_props, i;
/* use get_children_properties, rather than list_children_properties
* to ensure we are getting all the properties, without any interference
* from the ->list_children_properties vmethods */
GParamSpec **child_props =
ges_timeline_element_get_children_properties (child,
&n_props);
for (i = 0; i < n_props; i++) {
GParamSpec *property = child_props[i];
GObject *prop_child =
ges_timeline_element_get_child_from_child_property (child, property);
if (prop_child)
_add_childs_child_property (child, prop_child, property, container);
g_param_spec_unref (property);
}
g_free (child_props);
}
static void
_remove_childs_child_property (GESTimelineElement * container_child,
GObject * prop_child, GParamSpec * property, GESContainer * container)
{
/* NOTE: some children may share the same GParamSpec. Currently, only
* the first such child added will have its children properties
* successfully registered for the container (even though the GObject
* child who the properties belong to will be a different instance). As
* such, we only want to remove the child property if it corresponds to
* the same instance that the parent container has.
* E.g. if we add child1 and child2, that have the same (or some
* overlapping) children properties. And child1 is added before child2,
* then child2's overlapping children properties would not be registered.
* If we remove child2, we do *not* want to removed the child properties
* for child1 because they belong to a GObject instance that we still
* have in our control.
* If we remove child1, we *do* want to remove the child properties for
* child1, even though child2 may overlap with some of them, because we
* are loosing the specific GObject instance that it belongs to!
* We could try and register the ones that match for the other children.
* However, it is probably simpler to change
* ges_timeline_element_add_child_property_full to accept the same
* GParamSpec, for different instances.
*/
GESTimelineElement *element = GES_TIMELINE_ELEMENT (container);
GObject *our_prop_child =
ges_timeline_element_get_child_from_child_property (element, property);
if (our_prop_child == prop_child)
ges_timeline_element_remove_child_property (element, property);
else
GST_INFO_OBJECT (container, "Not removing child property '%s' for child"
" %" GES_FORMAT " because it derives from the object %" GST_PTR_FORMAT
"(%p) rather than the object %" GST_PTR_FORMAT "(%p)", property->name,
GES_ARGS (container_child), prop_child, prop_child, our_prop_child,
our_prop_child);
}
static void
_ges_container_remove_child_properties (GESContainer * container,
GESTimelineElement * child)
{
guint n_props, i;
/* use get_children_properties, rather than list_children_properties
* to ensure we are getting all the properties, without any interference
* from the ->list_children_properties vmethods */
GParamSpec **child_props =
ges_timeline_element_get_children_properties (child,
&n_props);
for (i = 0; i < n_props; i++) {
GParamSpec *property = child_props[i];
GObject *prop_child =
ges_timeline_element_get_child_from_child_property (child, property);
if (prop_child)
_remove_childs_child_property (child, prop_child, property, container);
g_param_spec_unref (property);
}
g_free (child_props);
}
static gboolean
_lookup_child (GESTimelineElement * self, const gchar * prop_name,
GObject ** child, GParamSpec ** pspec)
{
GList *tmp;
/* FIXME Implement a syntax to precisely get properties by path */
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;
}
static GESTrackType
_get_track_types (GESTimelineElement * object)
{
GESTrackType types = GES_TRACK_TYPE_UNKNOWN;
GList *tmp, *children = ges_container_get_children (GES_CONTAINER (object),
TRUE);
for (tmp = children; tmp; tmp = tmp->next) {
if (GES_IS_TRACK_ELEMENT (tmp->data)) {
types |= ges_timeline_element_get_track_types (tmp->data);
}
}
g_list_free_full (children, gst_object_unref);
return types ^ GES_TRACK_TYPE_UNKNOWN;
}
static void
_deep_copy (GESTimelineElement * element, GESTimelineElement * copy)
{
GList *tmp;
GESContainer *self = GES_CONTAINER (element), *ccopy = GES_CONTAINER (copy);
for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) {
ChildMapping *map, *orig_map;
orig_map = g_hash_table_lookup (self->priv->mappings, tmp->data);
map = g_new0 (ChildMapping, 1);
map->child = ges_timeline_element_copy (tmp->data, TRUE);
map->start_offset = orig_map->start_offset;
ccopy->priv->copied_children = g_list_prepend (ccopy->priv->copied_children,
map);
}
}
static GESTimelineElement *
_paste (GESTimelineElement * element, GESTimelineElement * ref,
GstClockTime paste_position)
{
GList *tmp;
ChildMapping *map;
GESContainer *ncontainer =
GES_CONTAINER (ges_timeline_element_copy (element, FALSE));
GESContainer *self = GES_CONTAINER (element);
for (tmp = self->priv->copied_children; tmp; tmp = tmp->next) {
GESTimelineElement *nchild;
map = tmp->data;
nchild =
ges_timeline_element_paste (map->child,
paste_position - map->start_offset);
if (!nchild) {
while (ncontainer->children)
ges_container_remove (ncontainer, ncontainer->children->data);
g_object_unref (ncontainer);
return NULL;
}
/* for GESGroups, this may register the group on the timeline */
if (!ges_container_add (ncontainer, nchild))
GST_ERROR ("%" GES_FORMAT " could not add child %p while"
" copying, this should never happen", GES_ARGS (ncontainer), nchild);
}
return GES_TIMELINE_ELEMENT (ncontainer);
}
/******************************************
* *
* GObject virtual methods implementation *
* *
******************************************/
static void
_dispose (GObject * object)
{
GList *tmp;
GESContainer *self = GES_CONTAINER (object);
GList *children;
_ges_container_sort_children (self);
children = ges_container_get_children (self, FALSE);
for (tmp = g_list_last (children); tmp; tmp = tmp->prev)
ges_container_remove (self, tmp->data);
g_list_free_full (children, gst_object_unref);
self->children = NULL;
G_OBJECT_CLASS (ges_container_parent_class)->dispose (object);
}
static void
_finalize (GObject * object)
{
GESContainer *self = GES_CONTAINER (object);
g_list_free_full (self->priv->copied_children,
(GDestroyNotify) _free_mapping);
if (self->priv->mappings)
g_hash_table_destroy (self->priv->mappings);
G_OBJECT_CLASS (ges_container_parent_class)->finalize (object);
}
static void
_get_property (GObject * container, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESContainer *tobj = GES_CONTAINER (container);
switch (property_id) {
case PROP_HEIGHT:
g_value_set_uint (value, tobj->height);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (container, property_id, pspec);
}
}
static void
_set_property (GObject * container, guint property_id,
const GValue * value, GParamSpec * pspec)
{
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (container, property_id, pspec);
}
}
static void
ges_container_class_init (GESContainerClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (ges_container_debug, "gescontainer",
GST_DEBUG_FG_YELLOW, "ges container");
object_class->get_property = _get_property;
object_class->set_property = _set_property;
object_class->dispose = _dispose;
object_class->finalize = _finalize;
/**
* GESContainer:height:
*
* The span of the container's children's #GESTimelineElement:priority
* values, which is the number of integers that lie between (inclusive)
* the minimum and maximum priorities found amongst the container's
* children (maximum - minimum + 1).
*/
properties[PROP_HEIGHT] = g_param_spec_uint ("height", "Height",
"The span of priorities this container occupies", 0, G_MAXUINT, 1,
G_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_HEIGHT,
properties[PROP_HEIGHT]);
/**
* GESContainer::child-added:
* @container: The #GESContainer
* @element: The child that was added
*
* Will be emitted after a child is added to the container. Usually,
* you should connect with g_signal_connect_after() since the signal
* may be stopped internally.
*/
ges_container_signals[CHILD_ADDED_SIGNAL] =
g_signal_new ("child-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESContainerClass, child_added),
NULL, NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_TIMELINE_ELEMENT);
/**
* GESContainer::child-removed:
* @container: The #GESContainer
* @element: The child that was removed
*
* Will be emitted after a child is removed from the container.
*/
ges_container_signals[CHILD_REMOVED_SIGNAL] =
g_signal_new ("child-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GESContainerClass, child_removed),
NULL, NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_TIMELINE_ELEMENT);
element_class->set_start = _set_start;
element_class->set_duration = _set_duration;
element_class->lookup_child = _lookup_child;
element_class->get_track_types = _get_track_types;
element_class->paste = _paste;
element_class->deep_copy = _deep_copy;
/* No default implementations */
klass->remove_child = NULL;
klass->add_child = NULL;
klass->ungroup = NULL;
klass->group = NULL;
klass->grouping_priority = 0;
klass->edit = NULL;
}
static void
ges_container_init (GESContainer * self)
{
self->priv = ges_container_get_instance_private (self);
/* FIXME, check why default was GST_SECOND? (before the existend of
* ges-container)
*
* _DURATION (self) = GST_SECOND; */
self->height = 1; /* FIXME Why 1 and not 0? */
self->children = NULL;
self->priv->mappings = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, (GDestroyNotify) _free_mapping);
}
/**********************************************
* *
* Property notifications from Children *
* *
**********************************************/
static void
_update_start_duration (GESContainer * container, GESTimelineElement * child)
{
GList *tmp;
GstClockTime duration, end = 0, start = G_MAXUINT64;
gboolean was_being_edited = GES_TIMELINE_ELEMENT_BEING_EDITED (container);
if (!container->children) {
/* If we are now empty, keep the same duration and start. This works
* well for a clip. For a group, the duration should probably be set
* to 0, but it gets automatically removed from the timeline when it
* is emptied */
return;
}
GES_TIMELINE_ELEMENT_SET_BEING_EDITED (container);
for (tmp = container->children; tmp; tmp = tmp->next) {
start = MIN (start, _START (tmp->data));
end = MAX (end, _END (tmp->data));
}
if (end < start)
duration = 0;
else
duration = end - start;
if (start != _START (container) || duration != _DURATION (container)) {
GstClockTime prev_dur = _DURATION (container);
GstClockTime prev_start = _START (container);
_DURATION (container) = duration;
_START (container) = start;
GST_INFO ("%" GES_FORMAT " child %" GES_FORMAT " move made us move",
GES_ARGS (container), GES_ARGS (child));
if (prev_start != start)
g_object_notify (G_OBJECT (container), "start");
if (prev_dur != duration)
g_object_notify (G_OBJECT (container), "duration");
}
if (!was_being_edited)
GES_TIMELINE_ELEMENT_UNSET_BEING_EDITED (container);
g_hash_table_foreach (container->priv->mappings,
(GHFunc) _resync_position_offsets, container);
}
static void
_child_start_changed_cb (GESTimelineElement * child,
GParamSpec * arg G_GNUC_UNUSED, GESContainer * container)
{
ChildMapping *map;
GESContainerPrivate *priv = container->priv;
GESTimelineElement *element = GES_TIMELINE_ELEMENT (container);
GESChildrenControlMode mode = container->children_control_mode;
if (mode == GES_CHILDREN_IGNORE_NOTIFIES)
return;
if (GES_TIMELINE_ELEMENT_BEING_EDITED (child))
mode = GES_CHILDREN_UPDATE_ALL_VALUES;
map = g_hash_table_lookup (priv->mappings, child);
g_assert (map);
switch (mode) {
case GES_CHILDREN_UPDATE_ALL_VALUES:
_update_start_duration (container, child);
break;
case GES_CHILDREN_UPDATE_OFFSETS:
map->start_offset = _START (container) - _START (child);
break;
case GES_CHILDREN_UPDATE:
/* We update all the children calling our set_start method */
container->initiated_move = child;
_set_start0 (element, _START (child) + map->start_offset);
container->initiated_move = NULL;
break;
default:
break;
}
}
static void
_child_duration_changed_cb (GESTimelineElement * child,
GParamSpec * arg G_GNUC_UNUSED, GESContainer * container)
{
ChildMapping *map;
GESContainerPrivate *priv = container->priv;
GESTimelineElement *element = GES_TIMELINE_ELEMENT (container);
GESChildrenControlMode mode = container->children_control_mode;
if (mode == GES_CHILDREN_IGNORE_NOTIFIES)
return;
if (GES_TIMELINE_ELEMENT_BEING_EDITED (child))
mode = GES_CHILDREN_UPDATE_ALL_VALUES;
map = g_hash_table_lookup (priv->mappings, child);
g_assert (map);
switch (mode) {
case GES_CHILDREN_UPDATE_ALL_VALUES:
_update_start_duration (container, child);
break;
case GES_CHILDREN_UPDATE_OFFSETS:
map->duration_offset = _DURATION (container) - _DURATION (child);
break;
case GES_CHILDREN_UPDATE:
/* We update all the children calling our set_duration method */
container->initiated_move = child;
/* FIXME: this is *not* the correct duration for a group!
* the ->set_duration method for GESGroup tries to hack around
* this by calling set_duration on itself to the actual value */
_set_duration0 (element, _DURATION (child) + map->duration_offset);
container->initiated_move = NULL;
break;
default:
break;
}
}
/****************************************************
* *
* Internal methods implementation *
* *
****************************************************/
void
_ges_container_sort_children (GESContainer * container)
{
container->children = g_list_sort (container->children,
(GCompareFunc) element_start_compare);
}
void
_ges_container_set_height (GESContainer * container, guint32 height)
{
if (container->height != height) {
container->height = height;
GST_DEBUG_OBJECT (container, "Updating height %i", container->height);
g_object_notify (G_OBJECT (container), "height");
}
}
/**********************************************
* *
* API implementation *
* *
**********************************************/
/**
* ges_container_add:
* @container: A #GESContainer
* @child: The element to add as a child
*
* Adds a timeline element to the container. The element will now be a
* child of the container (and the container will be the
* #GESTimelineElement:parent of the added element), which means that it
* is now controlled by the container. This may change the properties of
* the child or the container, depending on the subclass.
*
* Additionally, the children properties of the newly added element will
* be shared with the container, meaning they can also be read and set
* using ges_timeline_element_get_child_property() and
* ges_timeline_element_set_child_property() on the container.
*
* Returns: %TRUE if @child was successfully added to @container.
*/
gboolean
ges_container_add (GESContainer * container, GESTimelineElement * child)
{
ChildMapping *mapping;
gboolean ret = FALSE;
GESContainerClass *class;
GList *current_children, *tmp;
GESContainerPrivate *priv;
g_return_val_if_fail (GES_IS_CONTAINER (container), FALSE);
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (child), FALSE);
g_return_val_if_fail (GES_TIMELINE_ELEMENT_PARENT (child) == NULL, FALSE);
class = GES_CONTAINER_GET_CLASS (container);
priv = container->priv;
GST_DEBUG_OBJECT (container, "adding timeline element %" GST_PTR_FORMAT,
child);
/* freeze all notifies */
g_object_freeze_notify (G_OBJECT (container));
/* copy to use at end, since container->children may have child
* added to it */
current_children = g_list_copy_deep (container->children,
(GCopyFunc) gst_object_ref, NULL);
for (tmp = current_children; tmp; tmp = tmp->next)
g_object_freeze_notify (G_OBJECT (tmp->data));
g_object_freeze_notify (G_OBJECT (child));
gst_object_ref_sink (child);
if (class->add_child) {
if (class->add_child (container, child) == FALSE) {
GST_WARNING_OBJECT (container, "Error adding child %p", child);
goto done;
}
}
mapping = g_new0 (ChildMapping, 1);
mapping->child = gst_object_ref (child);
g_hash_table_insert (priv->mappings, child, mapping);
container->children = g_list_append (container->children, child);
/* Listen to all property changes */
mapping->start_notifyid =
g_signal_connect (G_OBJECT (child), "notify::start",
G_CALLBACK (_child_start_changed_cb), container);
mapping->duration_notifyid =
g_signal_connect (G_OBJECT (child), "notify::duration",
G_CALLBACK (_child_duration_changed_cb), container);
if (ges_timeline_element_set_parent (child, GES_TIMELINE_ELEMENT (container))
== FALSE) {
if (class->remove_child)
class->remove_child (container, child);
g_hash_table_remove (priv->mappings, child);
container->children = g_list_remove (container->children, child);
goto done;
}
_update_start_duration (container, child);
_ges_container_sort_children (container);
_ges_container_add_child_properties (container, child);
mapping->child_property_added_notifyid =
g_signal_connect (G_OBJECT (child), "child-property-added",
G_CALLBACK (_add_childs_child_property), container);
mapping->child_property_removed_notifyid =
g_signal_connect (G_OBJECT (child), "child-property-removed",
G_CALLBACK (_remove_childs_child_property), container);
priv->adding_children = g_list_prepend (priv->adding_children, child);
g_signal_emit (container, ges_container_signals[CHILD_ADDED_SIGNAL], 0,
child);
priv->adding_children = g_list_remove (priv->adding_children, child);
ret = TRUE;
done:
/* thaw all notifies */
/* Ignore notifies for the start and duration since the child should
* already be correctly set up */
container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
g_object_thaw_notify (G_OBJECT (container));
for (tmp = current_children; tmp; tmp = tmp->next)
g_object_thaw_notify (G_OBJECT (tmp->data));
g_object_thaw_notify (G_OBJECT (child));
g_list_free_full (current_children, gst_object_unref);
gst_object_unref (child);
container->children_control_mode = GES_CHILDREN_UPDATE;
return ret;
}
/**
* ges_container_remove:
* @container: A #GESContainer
* @child: The child to remove
*
* Removes a timeline element from the container. The element will no
* longer be controlled by the container.
*
* Returns: %TRUE if @child was successfully removed from @container.
*/
gboolean
ges_container_remove (GESContainer * container, GESTimelineElement * child)
{
GESContainerClass *klass;
GESContainerPrivate *priv;
GList *current_children, *tmp;
gboolean ret = FALSE;
g_return_val_if_fail (GES_IS_CONTAINER (container), FALSE);
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (child), FALSE);
GST_DEBUG_OBJECT (container, "removing child: %" GST_PTR_FORMAT, child);
klass = GES_CONTAINER_GET_CLASS (container);
priv = container->priv;
if (!(g_hash_table_lookup (priv->mappings, child))) {
GST_WARNING_OBJECT (container, "Element isn't controlled by this "
"container");
return FALSE;
}
/* ref the container since it might be destroyed when the child is
* removed! (see GESGroup ->child_removed) */
gst_object_ref (container);
/* freeze all notifies */
g_object_freeze_notify (G_OBJECT (container));
/* copy to use at end, since container->children may have child
* removed from it */
current_children = g_list_copy_deep (container->children,
(GCopyFunc) gst_object_ref, NULL);
for (tmp = current_children; tmp; tmp = tmp->next)
g_object_freeze_notify (G_OBJECT (tmp->data));
if (klass->remove_child) {
if (klass->remove_child (container, child) == FALSE)
goto done;
}
container->children = g_list_remove (container->children, child);
g_hash_table_remove (priv->mappings, child);
_ges_container_remove_child_properties (container, child);
if (!g_list_find (container->priv->adding_children, child)) {
g_signal_emit (container, ges_container_signals[CHILD_REMOVED_SIGNAL], 0,
child);
} else {
GESContainerClass *klass = GES_CONTAINER_GET_CLASS (container);
if (klass->child_removed)
klass->child_removed (container, child);
GST_INFO_OBJECT (container,
"Not emitting 'child-removed' signal as child"
" removal happend during 'child-added' signal emission");
}
_update_start_duration (container, child);
ret = TRUE;
done:
/* thaw all notifies */
g_object_thaw_notify (G_OBJECT (container));
for (tmp = current_children; tmp; tmp = tmp->next)
g_object_thaw_notify (G_OBJECT (tmp->data));
g_list_free_full (current_children, gst_object_unref);
gst_object_unref (container);
return ret;
}
static void
_get_children_recursively (GESContainer * container, GList ** children)
{
GList *tmp;
*children =
g_list_concat (*children, g_list_copy_deep (container->children,
(GCopyFunc) gst_object_ref, NULL));
for (tmp = container->children; tmp; tmp = tmp->next) {
GESTimelineElement *element = tmp->data;
if (GES_IS_CONTAINER (element))
_get_children_recursively (tmp->data, children);
}
}
/**
* ges_container_get_children:
* @container: A #GESContainer
* @recursive: Whether to recursively get children in @container
*
* Get the list of timeline elements contained in the container. If
* @recursive is %TRUE, and the container contains other containers as
* children, then their children will be added to the list, in addition to
* themselves, and so on.
*
* Returns: (transfer full) (element-type GESTimelineElement): The list of
* #GESTimelineElement-s contained in @container.
*/
GList *
ges_container_get_children (GESContainer * container, gboolean recursive)
{
GList *children = NULL;
g_return_val_if_fail (GES_IS_CONTAINER (container), NULL);
if (!recursive)
return g_list_copy_deep (container->children, (GCopyFunc) gst_object_ref,
NULL);
_get_children_recursively (container, &children);
return children;
}
/**
* ges_container_ungroup:
* @container: (transfer full): The container to ungroup
* @recursive: Whether to recursively ungroup @container
*
* Ungroups the container by splitting it into several containers
* containing various children of the original. The rules for how the
* container splits depends on the subclass. A #GESGroup will simply split
* into its children. A #GESClip will split into one #GESClip per
* #GESTrackType it overlaps with (so an audio-video clip will split into
* an audio clip and a video clip), where each clip contains all the
* #GESTrackElement-s from the original clip with a matching
* #GESTrackElement:track-type.
*
* If @recursive is %TRUE, and the container contains other containers as
* children, then they will also be ungrouped, and so on.
*
* Returns: (transfer full) (element-type GESContainer): The list of
* new #GESContainer-s created from the splitting of @container.
*/
GList *
ges_container_ungroup (GESContainer * container, gboolean recursive)
{
GESContainerClass *klass;
g_return_val_if_fail (GES_IS_CONTAINER (container), NULL);
GST_DEBUG_OBJECT (container, "Ungrouping container %s recursively",
recursive ? "" : "not");
klass = GES_CONTAINER_GET_CLASS (container);
if (klass->ungroup == NULL) {
GST_INFO_OBJECT (container, "No ungoup virtual method, doint nothing");
return NULL;
}
return klass->ungroup (container, recursive);
}
/**
* ges_container_group:
* @containers: (transfer none) (element-type GESContainer) (nullable):
* The #GESContainer-s to group
*
* Groups the containers into a single container by merging them. The
* containers must all belong to the same #GESTimelineElement:timeline.
*
* If the elements are all #GESClip-s then this method will attempt to
* combine them all into a single #GESClip. This should succeed if they:
* share the same #GESTimelineElement:start, #GESTimelineElement:duration
* and #GESTimelineElement:in-point; exist in the same layer; and all of
* the sources share the same #GESAsset. If this fails, or one of the
* elements is not a #GESClip, this method will try to create a #GESGroup
* instead.
*
* Returns: (transfer floating) (nullable): The container created by merging
* @containers, or %NULL if they could not be merged into a single
* container.
*/
GESContainer *
ges_container_group (GList * containers)
{
GList *tmp;
guint n_children;
GType *children_types;
GESTimelineElement *element;
GObjectClass *clip_class;
guint i = 0;
GESContainer *ret = NULL;
GESTimeline *timeline = NULL;
if (containers) {
element = GES_TIMELINE_ELEMENT (containers->data);
timeline = GES_TIMELINE_ELEMENT_TIMELINE (element);
g_return_val_if_fail (timeline, NULL);
}
if (g_list_length (containers) == 1) {
/* FIXME: Should return a floating **copy**. API specifies that the
* returned element is created. So users might expect to be able to
* freely dispose of the list, without the risk of the returned
* element being freed as well.
* TODO 2.0: (transfer full) would have been better */
return containers->data;
}
for (tmp = containers; tmp; tmp = tmp->next) {
g_return_val_if_fail (GES_IS_CONTAINER (tmp->data), NULL);
g_return_val_if_fail (GES_TIMELINE_ELEMENT_PARENT (tmp->data) == NULL,
NULL);
g_return_val_if_fail (GES_TIMELINE_ELEMENT_TIMELINE (tmp->data) == timeline,
NULL);
}
/* FIXME: how can user sub-classes interact with this if
* ->grouping_priority is private? */
children_types = g_type_children (GES_TYPE_CONTAINER, &n_children);
g_qsort_with_data (children_types, n_children, sizeof (GType),
(GCompareDataFunc) compare_grouping_prio, NULL);
for (i = 0; i < n_children; i++) {
clip_class = g_type_class_peek (children_types[i]);
/* FIXME: handle NULL ->group */
ret = GES_CONTAINER_CLASS (clip_class)->group (containers);
if (ret)
break;
}
g_free (children_types);
return ret;
}
/**
* ges_container_edit:
* @container: The #GESContainer to edit
* @layers: (element-type GESLayer) (nullable): A whitelist of layers
* where the edit can be performed, %NULL allows all layers in the
* timeline
* @new_layer_priority: The priority/index of the layer @container should
* be moved to. -1 means no move
* @mode: The edit mode
* @edge: The edge of @container where the edit should occur
* @position: The edit position: a new location for the edge of @container
* (in nanoseconds)
*
* Edits the container within its timeline.
*
* Returns: %TRUE if the edit of @container completed, %FALSE on failure.
*
* Deprecated: 1.18: use #ges_timeline_element_edit instead.
*/
gboolean
ges_container_edit (GESContainer * container, GList * layers,
gint new_layer_priority, GESEditMode mode, GESEdge edge, guint64 position)
{
g_return_val_if_fail (GES_IS_CONTAINER (container), FALSE);
return ges_timeline_element_edit (GES_TIMELINE_ELEMENT (container),
layers, new_layer_priority, mode, edge, position);
}