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#!/usr/bin/env python
#
# Copyright 2012 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
from __future__ import print_function
import sys
from argparse import ArgumentParser
import pmt
from gnuradio.blocks import parse_file_metadata
def main(filename, detached=False):
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 = 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 = 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 += parse_file_metadata.HEADER_LENGTH + info["extra_len"]
if(not detached):
nread += info['nbytes']
handle.seek(nread, 0)
print("\n\n")
if __name__ == "__main__":
description = "Read in a GNU Radio file with meta data, extracts the header and prints it."
parser = ArgumentParser(conflict_handler="resolve", description=description)
parser.add_argument("-D", "--detached", action="store_true",
help="Used if header is detached.")
parser.add_argument("file", metavar="FILE",
help="Input file");
args = parser.parse_args()
main(args.file, args.detached)
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