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op25-legacy/python/audio_capture.py

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#!/usr/bin/env python
#
# Copyright 2004,2007 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 3, 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_top_block(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
usage="%prog: [options] output_filename"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-I", "--audio-input", type="string", default="",
help="pcm input device name. E.g., hw:0,0 or /dev/dsp")
parser.add_option("-s", "--sample-rate", type="eng_float", default=48000,
help="set sample rate to RATE (48000)")
parser.add_option("-N", "--nsamples", type="eng_float", default=None,
help="number of samples to collect [default=+inf]")
(options, args) = parser.parse_args ()
if len(args) != 2:
parser.print_help()
raise SystemExit, 1
filename = args[0]
filename2 = args[1]
sample_rate = int(options.sample_rate)
src = audio.source (sample_rate, options.audio_input)
dst = gr.file_sink (gr.sizeof_float, filename)
dst2 = gr.file_sink (gr.sizeof_float, filename2)
if options.nsamples is None:
self.connect((src, 0), dst)
self.connect((src, 1), dst2)
else:
head = gr.head(gr.sizeof_float, int(options.nsamples))
head2 = gr.head(gr.sizeof_float, int(options.nsamples))
self.connect((src, 0), head, dst)
self.connect((src, 1), head2, dst2)
if __name__ == '__main__':
try:
my_top_block().run()
except KeyboardInterrupt:
pass