NT-MDT data: Python parsing library

A native file format of NT-MDT scientific software. Usually contains any of:

Some examples of mdt files can be downloaded at:

Application

["Nova", "Image Analysis", "NanoEducator", "Gwyddion", "Callisto"]

File extension

mdt

KS implementation details

License: GPL-3.0-or-later

This page hosts a formal specification of NT-MDT data using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.

Usage

Runtime library

All parsing code for Python generated by Kaitai Struct depends on the Python runtime library. You have to install it before you can parse data.

The Python runtime library can be installed from PyPI:

python3 -m pip install kaitaistruct

Code

Parse a local file and get structure in memory:

data = NtMdt.from_file("path/to/local/file.mdt")

Or parse structure from a bytes:

from kaitaistruct import KaitaiStream, BytesIO

raw = b"\x00\x01\x02..."
data = NtMdt(KaitaiStream(BytesIO(raw)))

After that, one can get various attributes from the structure by invoking getter methods like:

data.size # => File size (w/o header)

Python source code to parse NT-MDT data

nt_mdt.py

# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
# type: ignore

import kaitaistruct
from kaitaistruct import KaitaiStruct, KaitaiStream, BytesIO
from enum import IntEnum


if getattr(kaitaistruct, 'API_VERSION', (0, 9)) < (0, 11):
    raise Exception("Incompatible Kaitai Struct Python API: 0.11 or later is required, but you have %s" % (kaitaistruct.__version__))

class NtMdt(KaitaiStruct):
    """A native file format of NT-MDT scientific software. Usually contains
    any of:
    
    * [Scanning probe](https://en.wikipedia.org/wiki/Scanning_probe_microscopy) microscopy scans and spectra
    * [Raman spectra](https://en.wikipedia.org/wiki/Raman_spectroscopy)
    * results of their analysis
    
    Some examples of mdt files can be downloaded at:
    
    * <https://www.ntmdt-si.ru/resources/scan-gallery>
    * <http://callistosoft.narod.ru/Resources/Mdt.zip>
    
    .. seealso::
       Source - https://svn.code.sf.net/p/gwyddion/code/trunk/gwyddion/modules/file/nt-mdt.c
    """

    class AdcMode(IntEnum):
        height = 0
        dfl = 1
        lateral_f = 2
        bias_v = 3
        current = 4
        fb_out = 5
        mag = 6
        mag_sin = 7
        mag_cos = 8
        rms = 9
        calc_mag = 10
        phase1 = 11
        phase2 = 12
        calc_phase = 13
        ex1 = 14
        ex2 = 15
        hv_x = 16
        hv_y = 17
        snap_back = 18
        false = 255

    class Consts(IntEnum):
        frame_mode_size = 8
        frame_header_size = 22
        axis_scales_size = 30
        file_header_size = 32
        spectro_vars_min_size = 38
        scan_vars_min_size = 77

    class DataType(IntEnum):
        floatfix = -65544
        float80 = -16138
        float64 = -13320
        float48 = -9990
        float32 = -5892
        int64 = -8
        int32 = -4
        int16 = -2
        int8 = -1
        unknown0 = 0
        uint8 = 1
        uint16 = 2
        uint32 = 4
        uint64 = 8

    class SpmMode(IntEnum):
        constant_force = 0
        contact_constant_height = 1
        contact_error = 2
        lateral_force = 3
        force_modulation = 4
        spreading_resistance_imaging = 5
        semicontact_topography = 6
        semicontact_error = 7
        phase_contrast = 8
        ac_magnetic_force = 9
        dc_magnetic_force = 10
        electrostatic_force = 11
        capacitance_contrast = 12
        kelvin_probe = 13
        constant_current = 14
        barrier_height = 15
        constant_height = 16
        afam = 17
        contact_efm = 18
        shear_force_topography = 19
        sfom = 20
        contact_capacitance = 21
        snom_transmission = 22
        snom_reflection = 23
        snom_all = 24
        snom = 25

    class SpmTechnique(IntEnum):
        contact_mode = 0
        semicontact_mode = 1
        tunnel_current = 2
        snom = 3

    class Unit(IntEnum):
        raman_shift = -10
        reserved0 = -9
        reserved1 = -8
        reserved2 = -7
        reserved3 = -6
        meter = -5
        centi_meter = -4
        milli_meter = -3
        micro_meter = -2
        nano_meter = -1
        angstrom = 0
        nano_ampere = 1
        volt = 2
        none = 3
        kilo_hertz = 4
        degrees = 5
        percent = 6
        celsius_degree = 7
        volt_high = 8
        second = 9
        milli_second = 10
        micro_second = 11
        nano_second = 12
        counts = 13
        pixels = 14
        reserved_sfom0 = 15
        reserved_sfom1 = 16
        reserved_sfom2 = 17
        reserved_sfom3 = 18
        reserved_sfom4 = 19
        ampere2 = 20
        milli_ampere = 21
        micro_ampere = 22
        nano_ampere2 = 23
        pico_ampere = 24
        volt2 = 25
        milli_volt = 26
        micro_volt = 27
        nano_volt = 28
        pico_volt = 29
        newton = 30
        milli_newton = 31
        micro_newton = 32
        nano_newton = 33
        pico_newton = 34
        reserved_dos0 = 35
        reserved_dos1 = 36
        reserved_dos2 = 37
        reserved_dos3 = 38
        reserved_dos4 = 39

    class XmlParamType(IntEnum):
        none = 0
        laser_wavelength = 1
        units = 2
        data_array = 255

    class XmlScanLocation(IntEnum):
        hlt = 0
        hlb = 1
        hrt = 2
        hrb = 3
        vlt = 4
        vlb = 5
        vrt = 6
        vrb = 7
    def __init__(self, _io, _parent=None, _root=None):
        super(NtMdt, self).__init__(_io)
        self._parent = _parent
        self._root = _root or self
        self._read()

    def _read(self):
        self.signature = self._io.read_bytes(4)
        if not self.signature == b"\x01\xB0\x93\xFF":
            raise kaitaistruct.ValidationNotEqualError(b"\x01\xB0\x93\xFF", self.signature, self._io, u"/seq/0")
        self.size = self._io.read_u4le()
        self.reserved0 = self._io.read_bytes(4)
        self.last_frame = self._io.read_u2le()
        self.reserved1 = self._io.read_bytes(18)
        self.wrond_doc = self._io.read_bytes(1)
        self._raw_frames = self._io.read_bytes(self.size)
        _io__raw_frames = KaitaiStream(BytesIO(self._raw_frames))
        self.frames = NtMdt.Framez(_io__raw_frames, self, self._root)


    def _fetch_instances(self):
        pass
        self.frames._fetch_instances()

    class Frame(KaitaiStruct):

        class FrameType(IntEnum):
            scanned = 0
            spectroscopy = 1
            text = 3
            old_mda = 105
            mda = 106
            palette = 107
            curves_new = 190
            curves = 201
        def __init__(self, _io, _parent=None, _root=None):
            super(NtMdt.Frame, self).__init__(_io)
            self._parent = _parent
            self._root = _root
            self._read()

        def _read(self):
            self.size = self._io.read_u4le()
            self._raw_main = self._io.read_bytes(self.size - 4)
            _io__raw_main = KaitaiStream(BytesIO(self._raw_main))
            self.main = NtMdt.Frame.FrameMain(_io__raw_main, self, self._root)


        def _fetch_instances(self):
            pass
            self.main._fetch_instances()

        class AxisScale(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                super(NtMdt.Frame.AxisScale, self).__init__(_io)
                self._parent = _parent
                self._root = _root
                self._read()

            def _read(self):
                self.offset = self._io.read_f4le()
                self.step = self._io.read_f4le()
                self.unit = KaitaiStream.resolve_enum(NtMdt.Unit, self._io.read_s2le())


            def _fetch_instances(self):
                pass


        class DateTime(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                super(NtMdt.Frame.DateTime, self).__init__(_io)
                self._parent = _parent
                self._root = _root
                self._read()

            def _read(self):
                self.date = NtMdt.Frame.DateTime.Date(self._io, self, self._root)
                self.time = NtMdt.Frame.DateTime.Time(self._io, self, self._root)


            def _fetch_instances(self):
                pass
                self.date._fetch_instances()
                self.time._fetch_instances()

            class Date(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.DateTime.Date, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.year = self._io.read_u2le()
                    self.month = self._io.read_u2le()
                    self.day = self._io.read_u2le()


                def _fetch_instances(self):
                    pass


            class Time(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.DateTime.Time, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.hour = self._io.read_u2le()
                    self.min = self._io.read_u2le()
                    self.sec = self._io.read_u2le()


                def _fetch_instances(self):
                    pass



        class Dots(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                super(NtMdt.Frame.Dots, self).__init__(_io)
                self._parent = _parent
                self._root = _root
                self._read()

            def _read(self):
                self.fm_ndots = self._io.read_u2le()
                if self.fm_ndots > 0:
                    pass
                    self.coord_header = NtMdt.Frame.Dots.DotsHeader(self._io, self, self._root)

                self.coordinates = []
                for i in range(self.fm_ndots):
                    self.coordinates.append(NtMdt.Frame.Dots.DotsData(self._io, self, self._root))

                self.data = []
                for i in range(self.fm_ndots):
                    self.data.append(NtMdt.Frame.Dots.DataLinez(i, self._io, self, self._root))



            def _fetch_instances(self):
                pass
                if self.fm_ndots > 0:
                    pass
                    self.coord_header._fetch_instances()

                for i in range(len(self.coordinates)):
                    pass
                    self.coordinates[i]._fetch_instances()

                for i in range(len(self.data)):
                    pass
                    self.data[i]._fetch_instances()


            class DataLinez(KaitaiStruct):
                def __init__(self, index, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.Dots.DataLinez, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self.index = index
                    self._read()

                def _read(self):
                    self.forward = []
                    for i in range(self._parent.coordinates[self.index].forward_size):
                        self.forward.append(self._io.read_s2le())

                    self.backward = []
                    for i in range(self._parent.coordinates[self.index].backward_size):
                        self.backward.append(self._io.read_s2le())



                def _fetch_instances(self):
                    pass
                    for i in range(len(self.forward)):
                        pass

                    for i in range(len(self.backward)):
                        pass



            class DotsData(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.Dots.DotsData, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.coord_x = self._io.read_f4le()
                    self.coord_y = self._io.read_f4le()
                    self.forward_size = self._io.read_s4le()
                    self.backward_size = self._io.read_s4le()


                def _fetch_instances(self):
                    pass


            class DotsHeader(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.Dots.DotsHeader, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.header_size = self._io.read_s4le()
                    self._raw_header = self._io.read_bytes(self.header_size)
                    _io__raw_header = KaitaiStream(BytesIO(self._raw_header))
                    self.header = NtMdt.Frame.Dots.DotsHeader.Header(_io__raw_header, self, self._root)


                def _fetch_instances(self):
                    pass
                    self.header._fetch_instances()

                class Header(KaitaiStruct):
                    def __init__(self, _io, _parent=None, _root=None):
                        super(NtMdt.Frame.Dots.DotsHeader.Header, self).__init__(_io)
                        self._parent = _parent
                        self._root = _root
                        self._read()

                    def _read(self):
                        self.coord_size = self._io.read_s4le()
                        self.version = self._io.read_s4le()
                        self.xyunits = KaitaiStream.resolve_enum(NtMdt.Unit, self._io.read_s2le())


                    def _fetch_instances(self):
                        pass




        class FdCurvesNew(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                super(NtMdt.Frame.FdCurvesNew, self).__init__(_io)
                self._parent = _parent
                self._root = _root
                self._read()

            def _read(self):
                self.block_count = self._io.read_u4le()
                self.blocks_headers = []
                for i in range(self.block_count):
                    self.blocks_headers.append(NtMdt.Frame.FdCurvesNew.BlockDescr(self._io, self, self._root))

                self.blocks_names = []
                for i in range(self.block_count):
                    self.blocks_names.append((self._io.read_bytes(self.blocks_headers[i].name_len)).decode(u"UTF-8"))

                self.blocks_data = []
                for i in range(self.block_count):
                    self.blocks_data.append(self._io.read_bytes(self.blocks_headers[i].len))



            def _fetch_instances(self):
                pass
                for i in range(len(self.blocks_headers)):
                    pass
                    self.blocks_headers[i]._fetch_instances()

                for i in range(len(self.blocks_names)):
                    pass

                for i in range(len(self.blocks_data)):
                    pass


            class BlockDescr(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.FdCurvesNew.BlockDescr, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.name_len = self._io.read_u4le()
                    self.len = self._io.read_u4le()


                def _fetch_instances(self):
                    pass



        class FdMetaData(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                super(NtMdt.Frame.FdMetaData, self).__init__(_io)
                self._parent = _parent
                self._root = _root
                self._read()

            def _read(self):
                self.head_size = self._io.read_u4le()
                self.tot_len = self._io.read_u4le()
                self.guids = []
                for i in range(2):
                    self.guids.append(NtMdt.Uuid(self._io, self, self._root))

                self.frame_status = self._io.read_bytes(4)
                self.name_size = self._io.read_u4le()
                self.comm_size = self._io.read_u4le()
                self.view_info_size = self._io.read_u4le()
                self.spec_size = self._io.read_u4le()
                self.source_info_size = self._io.read_u4le()
                self.var_size = self._io.read_u4le()
                self.data_offset = self._io.read_u4le()
                self.data_size = self._io.read_u4le()
                self.title = (self._io.read_bytes(self.name_size)).decode(u"UTF-8")
                self.xml = (self._io.read_bytes(self.comm_size)).decode(u"UTF-8")
                self.struct_len = self._io.read_u4le()
                self.array_size = self._io.read_u8le()
                self.cell_size = self._io.read_u4le()
                self.n_dimensions = self._io.read_u4le()
                self.n_mesurands = self._io.read_u4le()
                self.dimensions = []
                for i in range(self.n_dimensions):
                    self.dimensions.append(NtMdt.Frame.FdMetaData.Calibration(self._io, self, self._root))

                self.mesurands = []
                for i in range(self.n_mesurands):
                    self.mesurands.append(NtMdt.Frame.FdMetaData.Calibration(self._io, self, self._root))



            def _fetch_instances(self):
                pass
                for i in range(len(self.guids)):
                    pass
                    self.guids[i]._fetch_instances()

                for i in range(len(self.dimensions)):
                    pass
                    self.dimensions[i]._fetch_instances()

                for i in range(len(self.mesurands)):
                    pass
                    self.mesurands[i]._fetch_instances()

                _ = self.image
                if hasattr(self, '_m_image'):
                    pass
                    self._m_image._fetch_instances()


            class Calibration(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.FdMetaData.Calibration, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.len_tot = self._io.read_u4le()
                    self.len_struct = self._io.read_u4le()
                    self.len_name = self._io.read_u4le()
                    self.len_comment = self._io.read_u4le()
                    self.len_unit = self._io.read_u4le()
                    self.si_unit = self._io.read_u8le()
                    self.accuracy = self._io.read_f8le()
                    self.function_id_and_dimensions = self._io.read_u8le()
                    self.bias = self._io.read_f8le()
                    self.scale = self._io.read_f8le()
                    self.min_index = self._io.read_u8le()
                    self.max_index = self._io.read_u8le()
                    self.data_type = KaitaiStream.resolve_enum(NtMdt.DataType, self._io.read_s4le())
                    self.len_author = self._io.read_u4le()
                    self.name = (self._io.read_bytes(self.len_name)).decode(u"UTF-8")
                    self.comment = (self._io.read_bytes(self.len_comment)).decode(u"UTF-8")
                    self.unit = (self._io.read_bytes(self.len_unit)).decode(u"UTF-8")
                    self.author = (self._io.read_bytes(self.len_author)).decode(u"UTF-8")


                def _fetch_instances(self):
                    pass

                @property
                def count(self):
                    if hasattr(self, '_m_count'):
                        return self._m_count

                    self._m_count = (self.max_index - self.min_index) + 1
                    return getattr(self, '_m_count', None)


            class Image(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.FdMetaData.Image, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.image = []
                    i = 0
                    while not self._io.is_eof():
                        self.image.append(NtMdt.Frame.FdMetaData.Image.Vec(self._io, self, self._root))
                        i += 1



                def _fetch_instances(self):
                    pass
                    for i in range(len(self.image)):
                        pass
                        self.image[i]._fetch_instances()


                class Vec(KaitaiStruct):
                    def __init__(self, _io, _parent=None, _root=None):
                        super(NtMdt.Frame.FdMetaData.Image.Vec, self).__init__(_io)
                        self._parent = _parent
                        self._root = _root
                        self._read()

                    def _read(self):
                        self.items = []
                        for i in range(self._parent._parent.n_mesurands):
                            _on = self._parent._parent.mesurands[i].data_type
                            if _on == NtMdt.DataType.float32:
                                pass
                                self.items.append(self._io.read_f4le())
                            elif _on == NtMdt.DataType.float64:
                                pass
                                self.items.append(self._io.read_f8le())
                            elif _on == NtMdt.DataType.int16:
                                pass
                                self.items.append(self._io.read_s2le())
                            elif _on == NtMdt.DataType.int32:
                                pass
                                self.items.append(self._io.read_s4le())
                            elif _on == NtMdt.DataType.int64:
                                pass
                                self.items.append(self._io.read_s8le())
                            elif _on == NtMdt.DataType.int8:
                                pass
                                self.items.append(self._io.read_s1())
                            elif _on == NtMdt.DataType.uint16:
                                pass
                                self.items.append(self._io.read_u2le())
                            elif _on == NtMdt.DataType.uint32:
                                pass
                                self.items.append(self._io.read_u4le())
                            elif _on == NtMdt.DataType.uint64:
                                pass
                                self.items.append(self._io.read_u8le())
                            elif _on == NtMdt.DataType.uint8:
                                pass
                                self.items.append(self._io.read_u1())



                    def _fetch_instances(self):
                        pass
                        for i in range(len(self.items)):
                            pass
                            _on = self._parent._parent.mesurands[i].data_type
                            if _on == NtMdt.DataType.float32:
                                pass
                            elif _on == NtMdt.DataType.float64:
                                pass
                            elif _on == NtMdt.DataType.int16:
                                pass
                            elif _on == NtMdt.DataType.int32:
                                pass
                            elif _on == NtMdt.DataType.int64:
                                pass
                            elif _on == NtMdt.DataType.int8:
                                pass
                            elif _on == NtMdt.DataType.uint16:
                                pass
                            elif _on == NtMdt.DataType.uint32:
                                pass
                            elif _on == NtMdt.DataType.uint64:
                                pass
                            elif _on == NtMdt.DataType.uint8:
                                pass




            @property
            def image(self):
                if hasattr(self, '_m_image'):
                    return self._m_image

                _pos = self._io.pos()
                self._io.seek(self.data_offset)
                self._raw__m_image = self._io.read_bytes(self.data_size)
                _io__raw__m_image = KaitaiStream(BytesIO(self._raw__m_image))
                self._m_image = NtMdt.Frame.FdMetaData.Image(_io__raw__m_image, self, self._root)
                self._io.seek(_pos)
                return getattr(self, '_m_image', None)


        class FdScanned(KaitaiStruct):

            class InputSignal(IntEnum):
                extension_slot = 0
                bias_v = 1
                ground = 2

            class LiftMode(IntEnum):
                step = 0
                fine = 1
                slope = 2

            class Mode(IntEnum):
                stm = 0
                afm = 1
                unknown2 = 2
                unknown3 = 3
                unknown4 = 4
            def __init__(self, _io, _parent=None, _root=None):
                super(NtMdt.Frame.FdScanned, self).__init__(_io)
                self._parent = _parent
                self._root = _root
                self._read()

            def _read(self):
                self._raw_vars = self._io.read_bytes(self._parent.var_size)
                _io__raw_vars = KaitaiStream(BytesIO(self._raw_vars))
                self.vars = NtMdt.Frame.FdScanned.Vars(_io__raw_vars, self, self._root)
                if False:
                    pass
                    self.orig_format = self._io.read_u4le()

                if False:
                    pass
                    self.tune = KaitaiStream.resolve_enum(NtMdt.Frame.FdScanned.LiftMode, self._io.read_u4le())

                if False:
                    pass
                    self.feedback_gain = self._io.read_f8le()

                if False:
                    pass
                    self.dac_scale = self._io.read_s4le()

                if False:
                    pass
                    self.overscan = self._io.read_s4le()

                self.fm_mode = self._io.read_u2le()
                self.fm_xres = self._io.read_u2le()
                self.fm_yres = self._io.read_u2le()
                self.dots = NtMdt.Frame.Dots(self._io, self, self._root)
                self.image = []
                for i in range(self.fm_xres * self.fm_yres):
                    self.image.append(self._io.read_s2le())

                self.title = NtMdt.Title(self._io, self, self._root)
                self.xml = NtMdt.Xml(self._io, self, self._root)


            def _fetch_instances(self):
                pass
                self.vars._fetch_instances()
                if False:
                    pass

                if False:
                    pass

                if False:
                    pass

                if False:
                    pass

                if False:
                    pass

                self.dots._fetch_instances()
                for i in range(len(self.image)):
                    pass

                self.title._fetch_instances()
                self.xml._fetch_instances()

            class Dot(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.FdScanned.Dot, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.x = self._io.read_s2le()
                    self.y = self._io.read_s2le()


                def _fetch_instances(self):
                    pass


            class ScanDir(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.FdScanned.ScanDir, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.unkn = self._io.read_bits_int_be(4)
                    self.double_pass = self._io.read_bits_int_be(1) != 0
                    self.bottom = self._io.read_bits_int_be(1) != 0
                    self.left = self._io.read_bits_int_be(1) != 0
                    self.horizontal = self._io.read_bits_int_be(1) != 0


                def _fetch_instances(self):
                    pass


            class Vars(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.FdScanned.Vars, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.x_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.y_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.z_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.channel_index = KaitaiStream.resolve_enum(NtMdt.AdcMode, self._io.read_u1())
                    self.mode = KaitaiStream.resolve_enum(NtMdt.Frame.FdScanned.Mode, self._io.read_u1())
                    self.xres = self._io.read_u2le()
                    self.yres = self._io.read_u2le()
                    self.ndacq = self._io.read_u2le()
                    self.step_length = self._io.read_f4le()
                    self.adt = self._io.read_u2le()
                    self.adc_gain_amp_log10 = self._io.read_u1()
                    self.adc_index = self._io.read_u1()
                    self.input_signal_or_version = self._io.read_u1()
                    self.substr_plane_order_or_pass_num = self._io.read_u1()
                    self.scan_dir = NtMdt.Frame.FdScanned.ScanDir(self._io, self, self._root)
                    self.power_of_2 = self._io.read_u1()
                    self.velocity = self._io.read_f4le()
                    self.setpoint = self._io.read_f4le()
                    self.bias_voltage = self._io.read_f4le()
                    self.draw = self._io.read_u1()
                    self.reserved = self._io.read_u1()
                    self.xoff = self._io.read_s4le()
                    self.yoff = self._io.read_s4le()
                    self.nl_corr = self._io.read_u1()


                def _fetch_instances(self):
                    pass
                    self.x_scale._fetch_instances()
                    self.y_scale._fetch_instances()
                    self.z_scale._fetch_instances()
                    self.scan_dir._fetch_instances()



        class FdSpectroscopy(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                super(NtMdt.Frame.FdSpectroscopy, self).__init__(_io)
                self._parent = _parent
                self._root = _root
                self._read()

            def _read(self):
                self._raw_vars = self._io.read_bytes(self._parent.var_size)
                _io__raw_vars = KaitaiStream(BytesIO(self._raw_vars))
                self.vars = NtMdt.Frame.FdSpectroscopy.Vars(_io__raw_vars, self, self._root)
                self.fm_mode = self._io.read_u2le()
                self.fm_xres = self._io.read_u2le()
                self.fm_yres = self._io.read_u2le()
                self.dots = NtMdt.Frame.Dots(self._io, self, self._root)
                self.data = []
                for i in range(self.fm_xres * self.fm_yres):
                    self.data.append(self._io.read_s2le())

                self.title = NtMdt.Title(self._io, self, self._root)
                self.xml = NtMdt.Xml(self._io, self, self._root)


            def _fetch_instances(self):
                pass
                self.vars._fetch_instances()
                self.dots._fetch_instances()
                for i in range(len(self.data)):
                    pass

                self.title._fetch_instances()
                self.xml._fetch_instances()

            class Vars(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    super(NtMdt.Frame.FdSpectroscopy.Vars, self).__init__(_io)
                    self._parent = _parent
                    self._root = _root
                    self._read()

                def _read(self):
                    self.x_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.y_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.z_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.sp_mode = self._io.read_u2le()
                    self.sp_filter = self._io.read_u2le()
                    self.u_begin = self._io.read_f4le()
                    self.u_end = self._io.read_f4le()
                    self.z_up = self._io.read_s2le()
                    self.z_down = self._io.read_s2le()
                    self.sp_averaging = self._io.read_u2le()
                    self.sp_repeat = self._io.read_u1()
                    self.sp_back = self._io.read_u1()
                    self.sp_4nx = self._io.read_s2le()
                    self.sp_osc = self._io.read_u1()
                    self.sp_n4 = self._io.read_u1()
                    self.sp_4x0 = self._io.read_f4le()
                    self.sp_4xr = self._io.read_f4le()
                    self.sp_4u = self._io.read_s2le()
                    self.sp_4i = self._io.read_s2le()
                    self.sp_nx = self._io.read_s2le()


                def _fetch_instances(self):
                    pass
                    self.x_scale._fetch_instances()
                    self.y_scale._fetch_instances()
                    self.z_scale._fetch_instances()



        class FrameMain(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                super(NtMdt.Frame.FrameMain, self).__init__(_io)
                self._parent = _parent
                self._root = _root
                self._read()

            def _read(self):
                self.type = KaitaiStream.resolve_enum(NtMdt.Frame.FrameType, self._io.read_u2le())
                self.version = NtMdt.Version(self._io, self, self._root)
                self.date_time = NtMdt.Frame.DateTime(self._io, self, self._root)
                self.var_size = self._io.read_u2le()
                _on = self.type
                if _on == NtMdt.Frame.FrameType.curves:
                    pass
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdSpectroscopy(_io__raw_frame_data, self, self._root)
                elif _on == NtMdt.Frame.FrameType.curves_new:
                    pass
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdCurvesNew(_io__raw_frame_data, self, self._root)
                elif _on == NtMdt.Frame.FrameType.mda:
                    pass
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdMetaData(_io__raw_frame_data, self, self._root)
                elif _on == NtMdt.Frame.FrameType.scanned:
                    pass
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdScanned(_io__raw_frame_data, self, self._root)
                elif _on == NtMdt.Frame.FrameType.spectroscopy:
                    pass
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdSpectroscopy(_io__raw_frame_data, self, self._root)
                else:
                    pass
                    self.frame_data = self._io.read_bytes_full()


            def _fetch_instances(self):
                pass
                self.version._fetch_instances()
                self.date_time._fetch_instances()
                _on = self.type
                if _on == NtMdt.Frame.FrameType.curves:
                    pass
                    self.frame_data._fetch_instances()
                elif _on == NtMdt.Frame.FrameType.curves_new:
                    pass
                    self.frame_data._fetch_instances()
                elif _on == NtMdt.Frame.FrameType.mda:
                    pass
                    self.frame_data._fetch_instances()
                elif _on == NtMdt.Frame.FrameType.scanned:
                    pass
                    self.frame_data._fetch_instances()
                elif _on == NtMdt.Frame.FrameType.spectroscopy:
                    pass
                    self.frame_data._fetch_instances()
                else:
                    pass



    class Framez(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            super(NtMdt.Framez, self).__init__(_io)
            self._parent = _parent
            self._root = _root
            self._read()

        def _read(self):
            self.frames = []
            for i in range(self._root.last_frame + 1):
                self.frames.append(NtMdt.Frame(self._io, self, self._root))



        def _fetch_instances(self):
            pass
            for i in range(len(self.frames)):
                pass
                self.frames[i]._fetch_instances()



    class Title(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            super(NtMdt.Title, self).__init__(_io)
            self._parent = _parent
            self._root = _root
            self._read()

        def _read(self):
            self.title_len = self._io.read_u4le()
            self.title = (self._io.read_bytes(self.title_len)).decode(u"windows-1251")


        def _fetch_instances(self):
            pass


    class Uuid(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            super(NtMdt.Uuid, self).__init__(_io)
            self._parent = _parent
            self._root = _root
            self._read()

        def _read(self):
            self.data = []
            for i in range(16):
                self.data.append(self._io.read_u1())



        def _fetch_instances(self):
            pass
            for i in range(len(self.data)):
                pass



    class Version(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            super(NtMdt.Version, self).__init__(_io)
            self._parent = _parent
            self._root = _root
            self._read()

        def _read(self):
            self.minor = self._io.read_u1()
            self.major = self._io.read_u1()


        def _fetch_instances(self):
            pass


    class Xml(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            super(NtMdt.Xml, self).__init__(_io)
            self._parent = _parent
            self._root = _root
            self._read()

        def _read(self):
            self.xml_len = self._io.read_u4le()
            self.xml = (self._io.read_bytes(self.xml_len)).decode(u"UTF-16LE")


        def _fetch_instances(self):
            pass