Return current TOC the setter uses. The TOC should not be modified without making it writable first.
TOC set, or
None. Unref with
gst_toc_unref when no longer needed
Reset the internal TOC. Elements should call this from within the state-change handler.
Set the given TOC on the setter. Previously set TOC will be unreffed before setting a new one.
Toc to set.