diff options
| author | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2007-02-23 19:10:22 +0000 |
|---|---|---|
| committer | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2007-02-23 19:10:22 +0000 |
| commit | b459380b7143f7e048d1d7ca3e6c8a04d563b9f3 (patch) | |
| tree | 1347bd7eb6f93f1e56018d58adadffdbf09c198c /gnuradio-examples/python/audio/noise.py | |
| parent | a39870d9fc9c4c7b6b8f9ae5de3286c5362470f7 (diff) | |
Added noise example using LFSR.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4615 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gnuradio-examples/python/audio/noise.py')
| -rwxr-xr-x | gnuradio-examples/python/audio/noise.py | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/gnuradio-examples/python/audio/noise.py b/gnuradio-examples/python/audio/noise.py new file mode 100755 index 0000000000..73694f31f9 --- /dev/null +++ b/gnuradio-examples/python/audio/noise.py @@ -0,0 +1,55 @@ +#!/usr/bin/env python +# +# Copyright 2007 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., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr +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("-r", "--sample-rate", type="eng_float", default=48000, + help="set sample rate to RATE (48000)") + (options, args) = parser.parse_args () + if len(args) != 0: + parser.print_help() + raise SystemExit, 1 + + sample_rate = int(options.sample_rate) + ampl = 0.1 + + src = gr.glfsr_source_b(32) # Pseudorandom noise source + b2f = gr.chunks_to_symbols_bf([ampl, -ampl], 1) + dst = audio.sink(sample_rate, options.audio_output) + self.connect(src, b2f, dst) + +if __name__ == '__main__': + try: + my_graph().run() + except KeyboardInterrupt: + pass |