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GESTrackObject: add a ges_track_object_lookup_child method

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Thibault Saunier 2011-02-25 11:32:44 +01:00 committed by Edward Hervey
parent b0f877a47c
commit 1add2482b8
3 changed files with 66 additions and 2 deletions
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1
docs/libs/ges-sections.txt
View file

@ -83,6 +83,7 @@ ges_track_object_get_inpoint
ges_track_object_get_duration
ges_track_object_get_priority
ges_track_object_is_active
ges_track_object_lookup_child
ges_track_object_set_child_property
ges_track_object_get_child_property
<SUBSECTION Standard>

62
ges/ges-track-object.c
View file

@ -988,6 +988,68 @@ ges_track_object_is_active (GESTrackObject * object)
return object->active;
}
/*
* ges_track_object_lookup_child:
* @object: object to lookup the property in
* @prop_name: name of the property to look up. You can specify the name of the
* class as such: ClassName::property-name, to guarantee that you get the
* proper GParamSpec in case various GstElement-s contain the same property
* name. If you don't do so, you will get the first element found, having
* this property and the and the corresponding GParamSpec.
* @element: (out) (allow-none) (transfer full): pointer to a #GstElement that
* takes the real object to set property on
* @pspec: (out) (allow-none) (transfer full): pointer to take the #GParamSpec
* describing the property
*
* Looks up which @element and @pspec would be effected by the given @name. If various
* contained elements have this property name you will get the first one, unless you
* specify the class name in @name.
*
* Returns: TRUE if @element and @pspec could be found. FALSE otherwise. In that
* case the values for @pspec and @element are not modified. Unref @element after
* usage.
*/
gboolean
ges_track_object_lookup_child (GESTrackObject * object, const gchar * prop_name,
GstElement ** element, GParamSpec ** pspec)
{
GHashTableIter iter;
gpointer key, value;
gchar **names, *name, *classename;
gboolean res;
GESTrackObjectPrivate *priv = object->priv;
classename = NULL;
res = FALSE;
names = g_strsplit (prop_name, "::", 2);
if (names[1] != NULL) {
classename = names[0];
name = names[1];
} else
name = names[0];
g_hash_table_iter_init (&iter, priv->properties_hashtable);
while (g_hash_table_iter_next (&iter, &key, &value)) {
if (g_strcmp0 (G_PARAM_SPEC (key)->name, name) == 0) {
if (classename == NULL ||
g_strcmp0 (G_OBJECT_TYPE_NAME (G_OBJECT (value)), classename) == 0) {
GST_DEBUG ("The %s property from %s has been found in %s", name,
classename, GST_OBJECT_NAME (GST_OBJECT (element)));
if (element)
*element = g_object_ref (value);
*pspec = g_param_spec_ref (key);
res = TRUE;
break;
}
}
}
g_strfreev (names);
return res;
}
/**
* ges_track_object_set_child_property:
* @object: a #GESTrackObject

5
ges/ges-track-object.h
View file

@ -161,8 +161,9 @@ guint64 ges_track_object_get_duration (GESTrackObject * object);
guint32 ges_track_object_get_priority (GESTrackObject * object);
gboolean ges_track_object_is_active (GESTrackObject * object);
void ges_track_object_set_child_property (GESTrackObject * object,
const gchar * property_name, GValue * value);
gboolean ges_track_object_lookup_child (GESTrackObject *object,
const gchar *prop_name, GstElement **element, GParamSpec **pspec);
void ges_track_object_get_child_property (GESTrackObject *object,
const gchar *property_name,
gpointer value);