From 36c0ba64703776f4cc2a77adc00740b05e0b055d Mon Sep 17 00:00:00 2001
From: trondeau <trondeau@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Sat, 7 Apr 2007 01:31:18 +0000
Subject: merged developer branch trondeau/cvsd -r4801:4904 to add CVSD vocoder
and example code
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4906 221aa14e-8319-0410-a670-987f0aec2ac5
---
.../python/digital_voice/cvsd_test.py | 67 ++++++++++++++++++++++
1 file changed, 67 insertions(+)
create mode 100755 gnuradio-examples/python/digital_voice/cvsd_test.py
(limited to 'gnuradio-examples/python/digital_voice/cvsd_test.py')
diff --git a/gnuradio-examples/python/digital_voice/cvsd_test.py b/gnuradio-examples/python/digital_voice/cvsd_test.py
new file mode 100755
index 0000000000..4ca7bca9e4
--- /dev/null
+++ b/gnuradio-examples/python/digital_voice/cvsd_test.py
@@ -0,0 +1,67 @@
+#!/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, blks
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+def main():
+ parser = OptionParser(option_class=eng_option)
+ 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("-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="32000",
+ help="Audio sampling rate [defaul=%default]")
+ parser.add_option("-S", "--resample-rate", type="int", default="8",
+ help="Resampling rate in CVSD [default=%default]")
+ (options, args) = parser.parse_args ()
+
+ if len(args) != 0:
+ parser.print_help()
+ raise SystemExit, 1
+
+ fg = gr.flow_graph()
+
+ src = audio.source(int(options.sample_rate), options.audio_input)
+ tx = blks.cvsd_encode(fg, options.resample_rate)
+
+ # todo: add noise
+
+ rx = blks.cvsd_decode(fg, options.resample_rate)
+ dst = audio.sink(int(options.sample_rate), options.audio_output)
+
+ fg.connect(src, tx, rx, dst)
+
+ fg.start()
+
+ raw_input ('Press Enter to exit: ')
+ fg.stop()
+
+
+if __name__ == '__main__':
+ try:
+ main()
+ except KeyboardInterrupt:
+ pass
+
--
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