text: 
  from ..tre_elements import TREExtension, TREElement
  import struct
  
  __classification__ = "UNCLASSIFIED"
  __author__ = "Thomas McCullough"
  
  
  class FRAME(TREElement):
      def __init__(self, value):
          super(FRAME, self).__init__()
          self.add_field('FRAME_OFFSET', 'b', 4, value)
  
  
  class NBLOCAType(TREElement):
      def __init__(self, value):
          super(NBLOCAType, self).__init__()
          self.add_field('FRAME_1_OFFSET', 'b', 4, value)
          self.add_field('NUMBER_OF_FRAMES', 'b', 4, value)
          self.add_loop('FRAMEs', struct.unpack('>I', self.NUMBER_OF_FRAMES)[0]-1, FRAME, value)
  
  
  class NBLOCA(TREExtension):
      _tag_value = 'NBLOCA'
      _data_type = NBLOCAType
  