Calls the provided function once for each field in the #GstStructure. The function must not modify the fields. Also see gst_structure_map_in_place() and gst_structure_filter_and_map_in_place().
a function to call for each field
private data
%TRUE if the supplied function returns %TRUE For each of the fields, %FALSE otherwise.
See Implementation
Calls the provided function once for each field in the #GstStructure. The function must not modify the fields. Also see gst_structure_map_in_place() and gst_structure_filter_and_map_in_place().