Optionalold_list: BufferListpointer to a pointer to a Gst.BufferList to be replaced.
Optionalnew_list: BufferListpointer to a Gst.BufferList that will replace the buffer list pointed to by old_list.
true if new_list was different from old_list
Modifies a pointer to a Gst.BufferList to point to a different Gst.BufferList. The modification is done atomically (so this is useful for ensuring thread safety in some cases), and the reference counts are updated appropriately (the old buffer list is unreffed, the new is reffed).
Either
new_listor the Gst.BufferList pointed to byold_listmay benull.