3 # Copyright 2007 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 3, 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, blks2
24 from gnuradio import audio
25 from gnuradio.eng_option import eng_option
26 from optparse import OptionParser
29 parser = OptionParser(option_class=eng_option)
30 parser.add_option("-I", "--audio-input", type="string", default="",
31 help="pcm input device name. E.g., hw:0,0 or /dev/dsp")
32 parser.add_option("-O", "--audio-output", type="string", default="",
33 help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
34 parser.add_option("-r", "--sample-rate", type="eng_float", default="32000",
35 help="Audio sampling rate [defaul=%default]")
36 parser.add_option("-S", "--resample-rate", type="int", default="8",
37 help="Resampling rate in CVSD [default=%default]")
38 (options, args) = parser.parse_args ()
46 src = audio.source(int(options.sample_rate), options.audio_input)
47 tx = blks2.cvsd_encode(options.resample_rate)
51 rx = blks2.cvsd_decode(options.resample_rate)
52 dst = audio.sink(int(options.sample_rate), options.audio_output)
54 tb.connect(src, tx, rx, dst)
57 if __name__ == '__main__':
58 print "Enter CTRL-C to exit"
61 except KeyboardInterrupt: