*
* 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., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstparamspec
+ * @title: GstParamSpec
* @short_description: GParamSpec implementations specific
* to GStreamer
*
* GParamSpec implementations specific to GStreamer.
- *
- * Last reviewed on 2008-03-11 (0.10.18)
*/
#ifdef HAVE_CONFIG_H
GType
gst_param_spec_fraction_get_type (void)
{
- static GType type; /* 0 */
+ static volatile GType gst_faction_type = 0;
/* register GST_TYPE_PARAM_FRACTION */
- if (type == 0) {
+ if (g_once_init_enter (&gst_faction_type)) {
+ GType type;
static GParamSpecTypeInfo pspec_info = {
sizeof (GstParamSpecFraction), /* instance_size */
0, /* n_preallocs */
_gst_param_fraction_validate, /* value_validate */
_gst_param_fraction_values_cmp, /* values_cmp */
};
- pspec_info.value_type = GST_TYPE_FRACTION;
+ pspec_info.value_type = gst_fraction_get_type ();
type = g_param_type_register_static ("GstParamFraction", &pspec_info);
+ g_once_init_leave (&gst_faction_type, type);
}
- return type;
+
+ return gst_faction_type;
}
/**
* used in connection with g_object_class_install_property() in a GObjects's
* instance_init function.
*
- * Returns: (transfer full): a newly created parameter specification
+ * Returns: (transfer full) (nullable): a newly created parameter specification
*/
GParamSpec *
gst_param_spec_fraction (const gchar * name, const gchar * nick,
return pspec;
}
+
+static void
+_gst_param_array_init (GParamSpec * pspec)
+{
+ GstParamSpecArray *aspec = GST_PARAM_SPEC_ARRAY_LIST (pspec);
+
+ aspec->element_spec = NULL;
+}
+
+static void
+_gst_param_array_finalize (GParamSpec * pspec)
+{
+ GstParamSpecArray *aspec = GST_PARAM_SPEC_ARRAY_LIST (pspec);
+ GParamSpecClass *parent_class =
+ g_type_class_peek (g_type_parent (GST_TYPE_PARAM_ARRAY_LIST));
+
+ if (aspec->element_spec) {
+ g_param_spec_unref (aspec->element_spec);
+ aspec->element_spec = NULL;
+ }
+
+ parent_class->finalize (pspec);
+}
+
+static gboolean
+_gst_param_array_validate (GParamSpec * pspec, GValue * value)
+{
+ GstParamSpecArray *aspec = GST_PARAM_SPEC_ARRAY_LIST (pspec);
+ gboolean ret = FALSE;
+
+ /* ensure array values validity against a present element spec */
+ if (aspec->element_spec) {
+ GParamSpec *element_spec = aspec->element_spec;
+ guint i;
+
+ for (i = 0; i < gst_value_array_get_size (value); i++) {
+ GValue *element = (GValue *) gst_value_array_get_value (value, i);
+
+ /* need to fixup value type, or ensure that the array value is initialized at all */
+ if (!g_value_type_compatible (G_VALUE_TYPE (element),
+ G_PARAM_SPEC_VALUE_TYPE (element_spec))) {
+ if (G_VALUE_TYPE (element) != 0)
+ g_value_unset (element);
+ g_value_init (element, G_PARAM_SPEC_VALUE_TYPE (element_spec));
+ g_param_value_set_default (element_spec, element);
+ ret = TRUE;
+ }
+
+ /* validate array value against element_spec */
+ if (g_param_value_validate (element_spec, element))
+ ret = TRUE;
+ }
+ }
+
+ return ret;
+}
+
+static gint
+_gst_param_array_values_cmp (GParamSpec * pspec, const GValue * value1,
+ const GValue * value2)
+{
+ GstParamSpecArray *aspec = GST_PARAM_SPEC_ARRAY_LIST (pspec);
+ guint size1, size2;
+
+ if (!value1 || !value2)
+ return value2 ? -1 : value1 != value2;
+
+ size1 = gst_value_array_get_size (value1);
+ size2 = gst_value_array_get_size (value2);
+
+ if (size1 != size2)
+ return size1 < size2 ? -1 : 1;
+ else if (!aspec->element_spec) {
+ /* we need an element specification for comparisons, so there's not much
+ * to compare here, try to at least provide stable lesser/greater result
+ */
+ return size1 < size2 ? -1 : size1 > size2;
+ } else { /* size1 == size2 */
+ guint i;
+
+ for (i = 0; i < size1; i++) {
+ const GValue *element1 = gst_value_array_get_value (value1, i);
+ const GValue *element2 = gst_value_array_get_value (value2, i);
+ gint cmp;
+
+ /* need corresponding element types, provide stable result otherwise */
+ if (G_VALUE_TYPE (element1) != G_VALUE_TYPE (element2))
+ return G_VALUE_TYPE (element1) < G_VALUE_TYPE (element2) ? -1 : 1;
+ cmp = g_param_values_cmp (aspec->element_spec, element1, element2);
+ if (cmp)
+ return cmp;
+ }
+ return 0;
+ }
+}
+
+GType
+gst_param_spec_array_get_type (void)
+{
+ static volatile GType gst_array_type = 0;
+
+ /* register GST_TYPE_PARAM_FRACTION */
+ if (g_once_init_enter (&gst_array_type)) {
+ GType type;
+ static GParamSpecTypeInfo pspec_info = {
+ sizeof (GstParamSpecArray), /* instance_size */
+ 0, /* n_preallocs */
+ _gst_param_array_init, /* instance_init */
+ G_TYPE_INVALID, /* value_type */
+ _gst_param_array_finalize, /* finalize */
+ NULL, /* value_set_default */
+ _gst_param_array_validate, /* value_validate */
+ _gst_param_array_values_cmp, /* values_cmp */
+ };
+ pspec_info.value_type = gst_value_array_get_type ();
+ type = g_param_type_register_static ("GstParamArray", &pspec_info);
+ g_once_init_leave (&gst_array_type, type);
+ }
+
+ return gst_array_type;
+}
+
+/**
+ * gst_param_spec_array:
+ * @name: canonical name of the property specified
+ * @nick: nick name for the property specified
+ * @blurb: description of the property specified
+ * @element_spec: GParamSpec of the array
+ * @flags: flags for the property specified
+ *
+ * This function creates a GstArray GParamSpec for use by objects/elements
+ * that want to expose properties of GstArray type. This function is
+ * typically * used in connection with g_object_class_install_property() in a
+ * GObjects's instance_init function.
+ *
+ * Returns: (transfer full): a newly created parameter specification
+ *
+ * Since: 1.14
+ */
+
+GParamSpec *
+gst_param_spec_array (const gchar * name,
+ const gchar * nick,
+ const gchar * blurb, GParamSpec * element_spec, GParamFlags flags)
+{
+ GstParamSpecArray *aspec;
+
+ g_return_val_if_fail (element_spec == NULL
+ || G_IS_PARAM_SPEC (element_spec), NULL);
+
+ aspec = g_param_spec_internal (GST_TYPE_PARAM_ARRAY_LIST,
+ name, nick, blurb, flags);
+ if (aspec == NULL)
+ return NULL;
+
+ if (element_spec) {
+ aspec->element_spec = g_param_spec_ref (element_spec);
+ g_param_spec_sink (element_spec);
+ }
+
+ return G_PARAM_SPEC (aspec);
+}
projects / platform / upstream / gstreamer.git / blobdiff