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#!/usr/bin/env python
#
# Copyright 2004,2005,2007,2008 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.
#
# GNU Radio example program to record a dial tone to a WAV file
from gnuradio import gr
from gnuradio.eng_option import eng_option
from optparse import OptionParser
class my_top_block(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
usage = "%prog: [options] filename"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
help="set sample rate to RATE (48000)")
parser.add_option("-N", "--samples", type="eng_float", default=None,
help="number of samples to record")
(options, args) = parser.parse_args ()
if len(args) != 1 or options.samples is None:
parser.print_help()
raise SystemExit, 1
sample_rate = int(options.sample_rate)
ampl = 0.1
src0 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 350, ampl)
src1 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 440, ampl)
head0 = gr.head(gr.sizeof_float, int(options.samples))
head1 = gr.head(gr.sizeof_float, int(options.samples))
dst = gr.wavfile_sink(args[0], 2, int(options.sample_rate), 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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