How to use the mutagen._util.cdata.uint_be function in mutagen

offsets = struct.unpack(fmt, data[4:])
            for offset in offsets:
                fileobj.seek(offset)
                samples.append(fileobj.read(8))
        for atom in moov.findall(b'co64', True):
            fileobj.seek(atom.offset + 12)
            data = fileobj.read(atom.length - 12)
            fmt = ">%dQ" % cdata.uint_be(data[:4])
            offsets = struct.unpack(fmt, data[4:])
            for offset in offsets:
                fileobj.seek(offset)
                samples.append(fileobj.read(8))
        try:
            for atom in atoms[b"moof"].findall(b'tfhd', True):
                data = fileobj.read(atom.length - 9)
                flags = cdata.uint_be(b"\x00" + data[:3])
                if flags & 1:
                    offset = cdata.ulonglong_be(data[7:15])
                    fileobj.seek(offset)
                    samples.append(fileobj.read(8))
        except KeyError:
            pass
        fileobj.close()
        return samples

def __update_parents(self, fileobj, path, delta):
        """Update all parent atoms with the new size."""
        for atom in path:
            fileobj.seek(atom.offset)
            size = cdata.uint_be(fileobj.read(4))
            if size == 1:  # 64bit
                # skip name (4B) and read size (8B)
                size = cdata.ulonglong_be(fileobj.read(12)[4:])
                fileobj.seek(atom.offset + 8)
                fileobj.write(cdata.to_ulonglong_be(size + delta))
            else:  # 32bit
                fileobj.seek(atom.offset)
                fileobj.write(cdata.to_uint_be(size + delta))

def __update_parents(self, fileobj, path, delta):
        """Update all parent atoms with the new size."""
        for atom in path:
            fileobj.seek(atom.offset)
            size = cdata.uint_be(fileobj.read(4))
            if size == 1:  # 64bit
                # skip name (4B) and read size (8B)
                size = cdata.ulonglong_be(fileobj.read(12)[4:])
                fileobj.seek(atom.offset + 8)
                fileobj.write(cdata.to_ulonglong_be(size + delta))
            else:  # 32bit
                fileobj.seek(atom.offset)
                fileobj.write(cdata.to_uint_be(size + delta))

def __update_offset_table(self, fileobj, fmt, atom, delta, offset):
        """Update offset table in the specified atom."""
        if atom.offset > offset:
            atom.offset += delta
        fileobj.seek(atom.offset + 12)
        data = fileobj.read(atom.length - 12)
        fmt = fmt % cdata.uint_be(data[:4])
        offsets = struct.unpack(fmt, data[4:])
        offsets = [o + (0, delta)[offset < o] for o in offsets]
        fileobj.seek(atom.offset + 16)
        fileobj.write(struct.pack(fmt, *offsets))

def __parse_freeform(self, atom, data):
        fileobj = StringIO(data)
        mean_length = cdata.uint_be(fileobj.read(4))
        # skip over 8 bytes of atom name, flags
        mean = fileobj.read(mean_length - 4)[8:]
        name_length = cdata.uint_be(fileobj.read(4))
        name = fileobj.read(name_length - 4)[8:]
        value_length = cdata.uint_be(fileobj.read(4))
        # Name, flags, and reserved bytes
        value = fileobj.read(value_length - 4)[12:]
        self["%s:%s:%s" % (atom.name, mean, name)] = value
    def __render_freeform(self, key, value):

def __update_tfhd(self, fileobj, atom, delta, offset):
        if atom.offset > offset:
            atom.offset += delta
        fileobj.seek(atom.offset + 9)
        data = fileobj.read(atom.length - 9)
        flags = cdata.uint_be(b"\x00" + data[:3])
        if flags & 1:
            o = cdata.ulonglong_be(data[7:15])
            if o > offset:
                o += delta
            fileobj.seek(atom.offset + 16)
            fileobj.write(cdata.to_ulonglong_be(o))

def __update_offset_table(self, fileobj, fmt, atom, delta, offset):
        """Update offset table in the specified atom."""
        if atom.offset > offset:
            atom.offset += delta
        fileobj.seek(atom.offset + 12)
        data = fileobj.read(atom.length - 12)
        fmt = fmt % cdata.uint_be(data[:4])
        offsets = struct.unpack(fmt, data[4:])
        offsets = [o + (0, delta)[offset < o] for o in offsets]
        fileobj.seek(atom.offset + 16)
        fileobj.write(struct.pack(fmt, *offsets))

def __update_parents(self, fileobj, path, delta):
        """Update all parent atoms with the new size."""

        if delta == 0:
            return

        for atom in path:
            fileobj.seek(atom.offset)
            size = cdata.uint_be(fileobj.read(4))
            if size == 1:  # 64bit
                # skip name (4B) and read size (8B)
                size = cdata.ulonglong_be(fileobj.read(12)[4:])
                fileobj.seek(atom.offset + 8)
                fileobj.write(cdata.to_ulonglong_be(size + delta))
            else:  # 32bit
                fileobj.seek(atom.offset)
                fileobj.write(cdata.to_uint_be(size + delta))