3 # Copyright 2006 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 2, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 # Boston, MA 02111-1307, USA.
23 from gnuradio import gr, audio
24 from gnuradio.eng_option import eng_option
25 from optparse import OptionParser
26 # must be imported from local directory so that make check
27 # can run before installation
30 class my_graph(gr.flow_graph):
33 gr.flow_graph.__init__(self)
35 parser = OptionParser(option_class=eng_option)
36 parser.add_option("-O", "--audio-output", type="string", default="",
37 help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
38 parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
39 help="set sample rate to RATE (48000)")
40 (options, args) = parser.parse_args ()
45 sample_rate = int(options.sample_rate)
46 audio_option = options.audio_output
47 src = audio.source (sample_rate, audio_option)
49 src_out_chan = src.output_signature().max_streams()
50 dst = audio.sink (sample_rate, str(enc_chan_in))
51 dst_in_chan = dst.input_signature().max_streams()
52 audio_el_size = dst.input_signature().sizeof_stream_item(0)
54 enc_code_in_chan = enc_chan_in
55 code_generators = [05, 06] #, 03, 04] #, 0, 07]
56 enc_code_out_chan = len (code_generators) / enc_code_in_chan
59 ss_enc = ecc.streams_encode_convolutional (frame_size,
65 for i in range (src_out_chan):
66 p2up = gr.packed_to_unpacked_bb (1, 1)
67 self.connect ((src, i), p2up, (ss_enc, i))
69 tau_bits = 0 # 0 -> decode all first
70 ss_dec = error-correcting-codes.dec_blk_conv_soft_full (audio_el_size,
77 up2bf0 = gr.chunks_to_symbols_bf ([1.0, -1.0])
78 self.connect ((ss_enc, 0), p2up0, up2bf0, (ss_dec, 0))
80 p2up1 = gr.packed_to_unpacked_bb (1, 1)
81 up2bf1 = gr.chunks_to_symbols_bf ([1.0, -1.0])
82 self.connect ((ss_enc, 1), p2up1, up2bf1, (ss_dec, 1))
84 for i in range (dst_in_chan):
85 self.connect ((ss_dec, i), (dst, i))
87 if __name__ == '__main__':
90 except KeyboardInterrupt: