| #!/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 | |