appden

import binascii
import struct

def pronto2lirc(pronto):
    codes = [long(binascii.hexlify(pronto[i:i+2]), 16) for i in xrange(0, len(pronto), 2)]

    if codes[0]:
        raise ValueError('Pronto code should start with 0000')
    if len(codes) != 4 + 2 * (codes[2] + codes[3]):
        raise ValueError('Number of pulse widths does not match the preamble')