diff options
| author | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-08-03 04:51:51 +0000 |
|---|---|---|
| committer | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-08-03 04:51:51 +0000 |
| commit | 5d69a524f81f234b3fbc41d49ba18d6f6886baba (patch) | |
| tree | b71312bf7f1e8d10fef0f3ac6f28784065e73e72 /gnuradio-examples/python/audio/test_resampler.py | |
Houston, we have a trunk.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gnuradio-examples/python/audio/test_resampler.py')
| -rwxr-xr-x | gnuradio-examples/python/audio/test_resampler.py | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/gnuradio-examples/python/audio/test_resampler.py b/gnuradio-examples/python/audio/test_resampler.py new file mode 100755 index 0000000000..6c9e5a7608 --- /dev/null +++ b/gnuradio-examples/python/audio/test_resampler.py @@ -0,0 +1,66 @@ +#!/usr/bin/env python +# +# Copyright 2004,2005 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 2, 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., 59 Temple Place - Suite 330, +# Boston, MA 02111-1307, USA. +# + +from gnuradio import gr, gru, blks +from gnuradio import audio +from gnuradio.eng_option import eng_option +from optparse import OptionParser + + +class my_graph(gr.flow_graph): + + def __init__(self): + gr.flow_graph.__init__(self) + + parser = OptionParser(option_class=eng_option) + parser.add_option("-O", "--audio-output", type="string", default="", + help="pcm output device name. E.g., hw:0,0 or /dev/dsp") + parser.add_option("-i", "--input-rate", type="eng_float", default=8000, + help="set input sample rate to RATE (%default)") + parser.add_option("-o", "--output-rate", type="eng_float", default=48000, + help="set output sample rate to RATE (%default)") + (options, args) = parser.parse_args () + if len(args) != 0: + parser.print_help() + raise SystemExit, 1 + + input_rate = int(options.input_rate) + output_rate = int(options.output_rate) + + interp = gru.lcm(input_rate, output_rate) / input_rate + decim = gru.lcm(input_rate, output_rate) / output_rate + + print "interp =", interp + print "decim =", decim + + ampl = 0.1 + src0 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 650, ampl) + rr = blks.rational_resampler_fff(self, interp, decim) + dst = audio.sink (output_rate, options.audio_output) + self.connect (src0, rr, (dst, 0)) + + +if __name__ == '__main__': + try: + my_graph().run() + except KeyboardInterrupt: + pass |