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-rwxr-xr-xgr-digital/examples/rx_voice.py151
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diff --git a/gr-digital/examples/rx_voice.py b/gr-digital/examples/rx_voice.py
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+#!/usr/bin/env python
+#
+# Copyright 2005,2006,2009,2011 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 uhd
+from gnuradio import audio
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+from gnuradio.vocoder import gsm_full_rate
+
+# From gr-digital
+from gnuradio import digital
+
+import random
+import struct
+import sys
+
+# from current dir
+from receive_path import receive_path
+
+#import os
+#print os.getpid()
+#raw_input('Attach and press enter')
+
+
+class audio_tx(gr.hier_block2):
+ def __init__(self, audio_output_dev):
+ gr.hier_block2.__init__(self, "audio_tx",
+ gr.io_signature(0, 0, 0), # Input signature
+ gr.io_signature(0, 0, 0)) # Output signature
+
+ sample_rate = 8000
+ self.packet_src = gr.message_source(33)
+ voice_decoder = gsm_full_rate.decode_ps()
+ s2f = gr.short_to_float ()
+ sink_scale = gr.multiply_const_ff(1.0/32767.)
+ audio_sink = audio.sink(sample_rate, audio_output_dev)
+ self.connect(self.packet_src, voice_decoder, s2f, sink_scale, audio_sink)
+
+ def msgq(self):
+ return self.packet_src.msgq()
+
+
+class my_top_block(gr.top_block):
+ def __init__(self, demod_class, rx_callback, options):
+ gr.top_block.__init__(self)
+ self.rxpath = receive_path(demod_class, rx_callback, options)
+ self.audio_tx = audio_tx(options.audio_output)
+
+ if(options.from_file is not None):
+ self.thr = gr.throttle(gr.sizeof_gr_complex, options.bitrate)
+ self.source = gr.file_source(gr.sizeof_gr_complex, options.from_file)
+ self.connect(self.source, self.thr, self.rxpath)
+ else:
+ self.thr = gr.throttle(gr.sizeof_gr_complex, 1e6)
+ self.source = gr.null_source(gr.sizeof_gr_complex)
+ self.connect(self.source, self.thr, self.rxpath)
+
+ self.connect(self.audio_tx)
+
+# /////////////////////////////////////////////////////////////////////////////
+# main
+# /////////////////////////////////////////////////////////////////////////////
+
+global n_rcvd, n_right
+
+def main():
+ global n_rcvd, n_right
+
+ n_rcvd = 0
+ n_right = 0
+
+ def rx_callback(ok, payload):
+ global n_rcvd, n_right
+ n_rcvd += 1
+ if ok:
+ n_right += 1
+
+ tb.audio_tx.msgq().insert_tail(gr.message_from_string(payload))
+
+ print "ok = %r n_rcvd = %4d n_right = %4d" % (
+ ok, n_rcvd, n_right)
+
+ demods = digital.modulation_utils2.type_1_demods()
+
+ # Create Options Parser:
+ parser = OptionParser (option_class=eng_option, conflict_handler="resolve")
+ expert_grp = parser.add_option_group("Expert")
+
+ parser.add_option("-m", "--modulation", type="choice", choices=demods.keys(),
+ default='gmsk',
+ help="Select modulation from: %s [default=%%default]"
+ % (', '.join(demods.keys()),))
+ 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("","--from-file", default=None,
+ help="input file of samples to demod")
+ receive_path.add_options(parser, expert_grp)
+
+ for mod in demods.values():
+ mod.add_options(expert_grp)
+
+ parser.set_defaults(bitrate=50e3) # override default bitrate default
+ (options, args) = parser.parse_args ()
+
+ if len(args) != 0:
+ parser.print_help(sys.stderr)
+ sys.exit(1)
+
+ if options.from_file is None:
+ if options.rx_freq is None:
+ sys.stderr.write("You must specify -f FREQ or --freq FREQ\n")
+ parser.print_help(sys.stderr)
+ sys.exit(1)
+
+
+ # build the graph
+ tb = my_top_block(demods[options.modulation], rx_callback, options)
+
+ r = gr.enable_realtime_scheduling()
+ if r != gr.RT_OK:
+ print "Warning: Failed to enable realtime scheduling."
+
+ tb.run()
+
+if __name__ == '__main__':
+ try:
+ main()
+ except KeyboardInterrupt:
+ pass