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| author | Johnathan Corgan <jcorgan@corganenterprises.com> | 2011-07-19 09:31:10 -0700 |
|---|---|---|
| committer | Johnathan Corgan <jcorgan@corganenterprises.com> | 2011-07-19 09:31:10 -0700 |
| commit | c0580462f19d99a97b7955b9215bd08eab24cd5b (patch) | |
| tree | d21dd2771c9880a37dce70cfa069aa3684cc1883 /gr-vocoder/examples | |
| parent | b80502b71eb27f9329b5d5e641bd0dd5ad0d7cdd (diff) | |
gr-vocoder: adds alaw encoder, decoder, and audio loopback example
Diffstat (limited to 'gr-vocoder/examples')
| -rw-r--r-- | gr-vocoder/examples/Makefile.am | 1 | ||||
| -rwxr-xr-x | gr-vocoder/examples/alaw_audio_loopback.py | 45 |
2 files changed, 46 insertions, 0 deletions
diff --git a/gr-vocoder/examples/Makefile.am b/gr-vocoder/examples/Makefile.am index 7cc469a998..6d881e1a6f 100644 --- a/gr-vocoder/examples/Makefile.am +++ b/gr-vocoder/examples/Makefile.am @@ -24,6 +24,7 @@ include $(top_srcdir)/Makefile.common ourdatadir = $(exampledir)/vocoder dist_ourdata_SCRIPTS = \ + alaw_audio_loopback.py \ codec2_audio_loopback.py \ cvsd_audio_loopback.py \ gsm_audio_loopback.py \ diff --git a/gr-vocoder/examples/alaw_audio_loopback.py b/gr-vocoder/examples/alaw_audio_loopback.py new file mode 100755 index 0000000000..8fdd64d443 --- /dev/null +++ b/gr-vocoder/examples/alaw_audio_loopback.py @@ -0,0 +1,45 @@ +#!/usr/bin/env python +# +# Copyright 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 audio +from gnuradio import vocoder + +def build_graph(): + tb = gr.top_block() + src = audio.source(8000) + src_scale = gr.multiply_const_ff(32767) + f2s = gr.float_to_short () + enc = vocoder.alaw_encode_sb() + dec = vocoder.alaw_decode_bs() + s2f = gr.short_to_float () + sink_scale = gr.multiply_const_ff(1.0/32767.) + sink = audio.sink(8000) + tb.connect(src, src_scale, f2s, enc, dec, s2f, sink_scale, sink) + return tb + +if __name__ == '__main__': + tb = build_graph() + tb.start() + raw_input ('Press Enter to exit: ') + tb.stop() + tb.wait() |