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#!/usr/bin/env python
#
# Copyright 2004,2005,2007,2008,2012,2013 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
# GNU Radio example program to record a dial tone to a WAV file
from gnuradio import gr
from gnuradio import blocks
from gnuradio.eng_arg import eng_float
from argparse import ArgumentParser
try:
from gnuradio import analog
except ImportError:
sys.stderr.write("Error: Program requires gr-analog.\n")
sys.exit(1)
class my_top_block(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
parser = ArgumentParser()
parser.add_argument("-r", "--sample-rate", type=eng_float, default=48000,
help="set sample rate to RATE (%(default)r)")
parser.add_argument("-N", "--samples", type=eng_float, required=True,
help="number of samples to record")
parser.add_argument('file_name', metavar='WAV-FILE',
help='Output WAV file name', nargs=1)
args = parser.parse_args()
sample_rate = int(args.sample_rate)
ampl = 0.1
src0 = analog.sig_source_f(sample_rate, analog.GR_SIN_WAVE, 350, ampl)
src1 = analog.sig_source_f(sample_rate, analog.GR_SIN_WAVE, 440, ampl)
head0 = blocks.head(gr.sizeof_float, int(args.samples))
head1 = blocks.head(gr.sizeof_float, int(args.samples))
dst = blocks.wavfile_sink(args.file_name[0], 2, int(args.sample_rate),
blocks.FORMAT_WAV, blocks.FORMAT_PCM_16)
self.connect(src0, head0, (dst, 0))
self.connect(src1, head1, (dst, 1))
if __name__ == '__main__':
try:
my_top_block().run()
except KeyboardInterrupt:
pass
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