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().
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().