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# Copyright 2011 Free Software Foundation, Inc.
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# This file is part of GNU Radio
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# GNU Radio is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# GNU Radio is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with GNU Radio; see the file COPYING. If not, write to
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# the Free Software Foundation, Inc., 51 Franklin Street,
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# Boston, MA 02110-1301, USA.
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from gnuradio import gr
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from gnuradio import audio
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from gnuradio import vocoder
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src = audio.source(8000)
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src_scale = gr.multiply_const_ff(32767)
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f2s = gr.float_to_short ()
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enc = vocoder.alaw_encode_sb()
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dec = vocoder.alaw_decode_bs()
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s2f = gr.short_to_float ()
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sink_scale = gr.multiply_const_ff(1.0/32767.)
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sink = audio.sink(8000)
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tb.connect(src, src_scale, f2s, enc, dec, s2f, sink_scale, sink)
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if __name__ == '__main__':
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raw_input ('Press Enter to exit: ')