3 # Copyright 2004,2005 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, gru, blks
24 from gnuradio import audio
25 from gnuradio.eng_option import eng_option
26 from optparse import OptionParser
29 class my_graph(gr.flow_graph):
32 gr.flow_graph.__init__(self)
34 parser = OptionParser(option_class=eng_option)
35 parser.add_option("-O", "--audio-output", type="string", default="",
36 help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
37 parser.add_option("-i", "--input-rate", type="eng_float", default=8000,
38 help="set input sample rate to RATE (%default)")
39 parser.add_option("-o", "--output-rate", type="eng_float", default=48000,
40 help="set output sample rate to RATE (%default)")
41 (options, args) = parser.parse_args ()
46 input_rate = int(options.input_rate)
47 output_rate = int(options.output_rate)
49 interp = gru.lcm(input_rate, output_rate) / input_rate
50 decim = gru.lcm(input_rate, output_rate) / output_rate
52 print "interp =", interp
53 print "decim =", decim
56 src0 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 650, ampl)
57 rr = blks.rational_resampler_fff(self, interp, decim)
58 dst = audio.sink (output_rate, options.audio_output)
59 self.connect (src0, rr, (dst, 0))
62 if __name__ == '__main__':
65 except KeyboardInterrupt: