DPXUserDefinedData 1843 coders/dpx.c             (dpx_file_info.user_defined_length >= sizeof(DPXUserDefinedData)))
DPXUserDefinedData 1858 coders/dpx.c             DPXUserDefinedData
DPXUserDefinedData 1879 coders/dpx.c             dpx_user_data=(DPXUserDefinedData *) user_data;