83 lines
2.5 KiB
Python
Executable File
83 lines
2.5 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# This work is licensed under the Creative Attribution-NonCommercial-ShareAlike
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# 3.0 Unported License.To view a copy of this license, visit
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# http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to
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# Creative Commons, 444 Castro Street, Suite 900, Mountain View,
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# California, 94041, USA.
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from __future__ import print_function
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from bitstring import BitArray
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from binascii import b2a_hex as h
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from time import time
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# Does anybody read this stuff? There's a PEP somewhere that says I should do this.
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__author__ = 'Cortney T. Buffington, N0MJS'
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__copyright__ = 'Copyright (c) 2016 Cortney T. Buffington, N0MJS and the K0USY Group'
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__credits__ = 'Colin Durbridge, G4EML, Steve Zingman, N4IRS; Mike Zingman, N4IRR; Jonathan Naylor, G4KLX; Hans Barthen, DL5DI; Torsten Shultze, DG1HT'
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__license__ = 'Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported'
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__maintainer__ = 'Cort Buffington, N0MJS'
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__email__ = 'n0mjs@me.com'
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def binary_196(_data):
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_data = bytearray(_data)
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_data = BitArray(_data)
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return _data[:98] + _data[-98:]
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def deint_196(_data):
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deint = BitArray(196)
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for index in range(196):
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deint[index] = _data[(index * 181) % 196]
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return deint
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def extract_196(_data):
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databits = BitArray()
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databits.append(_data[4:12])
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databits.append(_data[19:30])
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databits.append(_data[34:45])
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databits.append(_data[49:60])
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databits.append(_data[64:75])
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databits.append(_data[79:90])
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databits.append(_data[94:105])
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databits.append(_data[109:120])
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databits.append(_data[124:135])
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return databits.tobytes()
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if __name__ == '__main__':
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# Validation Example
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data = '\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20'
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t0 = time()
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bin_data = binary_196(data)
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t1 = time()
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deint_data = deint_196(bin_data)
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t2 = time()
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ext_data = extract_196(deint_data)
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t3 = time()
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print('binary extraction time:', t1-t0)
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print('deinterleave time: ', t2-t1)
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print('byte extraction time: ',t3-t2,'\n')
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print('Original 33 byte data block:')
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print(h(data))
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print(len(data))
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print()
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print('Extracted binary data (distarding sync)')
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print(bin_data.len)
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print(bin_data.bin)
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print()
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print('Deinterleaved binary data')
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print(deint_data.len)
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print(deint_data.bin)
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print()
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print('12 Bytes LC+RS (9,3)')
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print(len(ext_data))
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print(h(ext_data)) |