3 # Copyright 2004,2005,2006 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 2, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
23 from gnuradio import gr
24 from gnuradio import audio
25 from gnuradio.eng_option import eng_option
26 from optparse import OptionParser
28 class dial_tone(gr.hier_block2):
30 gr.hier_block2.__init__(self,
32 gr.io_signature(0,0,0),
33 gr.io_signature(0,0,0))
35 parser = OptionParser(option_class=eng_option)
36 parser.add_option("-O", "--audio-output", type="string", default="",
37 help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
38 parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
39 help="set sample rate to RATE (48000)")
40 (options, args) = parser.parse_args ()
45 sample_rate = int(options.sample_rate)
48 self.define_component("source0", gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 350, ampl))
49 self.define_component("source1", gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 440, ampl))
50 self.define_component("dest", audio.sink(sample_rate, options.audio_output))
51 self.connect("source0", 0, "dest", 0)
52 self.connect("source1", 0, "dest", 1)
54 if __name__ == '__main__':
55 top_block = dial_tone()
56 runtime = gr.runtime(top_block)
60 except KeyboardInterrupt: