+ * If defined, picture_pool_configuration_t::lock will be called before
+ * a picture is used, and picture_pool_configuration_t::unlock will be called
+ * as soon as a picture is unused. They are allowed to modify picture_t::p and
+ * access picture_t::p_sys.
+ */
+VLC_EXPORT( picture_pool_t *, picture_pool_NewExtended, ( const picture_pool_configuration_t * ) );
+
+/**
+ * It creates a picture_pool_t wrapping the given arrays of picture.
+ *
+ * It is provided as convenience.