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#!/usr/bin/env python
#
# Copyright 2012 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
from optparse import OptionParser
from gnuradio import gr
from gnuradio import parse_file_metadata
def main(filename):
handle = open(filename, "rb")
nheaders = 0
nread = 0
while(True):
# read out next header bytes
hdr_start = handle.tell()
header_str = handle.read(parse_file_metadata.HEADER_LENGTH)
if(len(header_str) == 0):
break
# Convert from string to PMT (should be a dictionary)
try:
header = gr.pmt_deserialize_str(header_str)
except RuntimeError:
sys.stderr.write("Could not deserialize header: invalid or corrupt data file.\n")
sys.exit(1)
print "HEADER {0}".format(nheaders)
info = parse_file_metadata.parse_header(header, True)
if(info["extra_len"] > 0):
extra_str = handle.read(info["extra_len"])
if(len(extra_str) == 0):
break
try:
extra = gr.pmt_deserialize_str(extra_str)
except RuntimeError:
sys.stderr.write("Could not deserialize extras: invalid or corrupt data file.\n")
sys.exit(1)
print "\nExtra Header:"
extra_info = parse_file_metadata.parse_extra_dict(extra, info, True)
nheaders += 1
nread += info['nbytes'] + parse_file_metadata.HEADER_LENGTH + info["extra_len"]
handle.seek(nread, 0)
print "\n\n"
if __name__ == "__main__":
usage="%prog: [options] filename"
description = "Read in a GNU Radio file with meta data, extracts the header and prints it."
parser = OptionParser(conflict_handler="resolve",
usage=usage, description=description)
(options, args) = parser.parse_args ()
if(len(args) < 1):
sys.stderr.write("No filename given\n")
sys.exit(1)
filename = args[0]
main(filename)
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