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#!/usr/bin/env python
#
# Copyright 2003 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
import sys
import struct
fin = sys.stdin
count = 0
expected = 0
last_correction = 0
while 1:
s = fin.read(2)
if not s or len(s) != 2:
break
v, = struct.unpack ('H', s)
iv = int(v) & 0xffff
# print "%8d %6d 0x%04x" % (count, iv, iv)
if count & 0x1: # only counting on the Q channel
if (expected & 0xffff) != iv:
print "%8d (%6d) %6d 0x%04x" % (count, count - last_correction, iv, iv)
expected = iv # reset expected sequence
last_correction = count
expected = (expected + 1) & 0xffff
count += 1
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