diff options
| -rw-r--r-- | gnuradio-examples/python/audio/Makefile.am | 1 | ||||
| -rwxr-xr-x | gnuradio-examples/python/audio/noise.py | 55 |
2 files changed, 56 insertions, 0 deletions
diff --git a/gnuradio-examples/python/audio/Makefile.am b/gnuradio-examples/python/audio/Makefile.am index 0a1213c34..28a1bc6c5 100644 --- a/gnuradio-examples/python/audio/Makefile.am +++ b/gnuradio-examples/python/audio/Makefile.am @@ -29,5 +29,6 @@ EXTRA_DIST = \ dialtone_v.py \ mono_tone.py \ multi_tone.py \ + noise.py \ spectrum_inversion.py \ test_resampler.py diff --git a/gnuradio-examples/python/audio/noise.py b/gnuradio-examples/python/audio/noise.py new file mode 100755 index 000000000..73694f31f --- /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 |