#!/usr/bin/env python
#
# Copyright 2004 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., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
# 

from gnuradio import gr
from gnuradio import audio

def build_graph ():
    sampling_freq = 32000

    fg = gr.flow_graph ()
    src0 = gr.noise_source_f ( gr.GR_GAUSSIAN, 1, 3010 )
    src1 = audio.source ( sampling_freq )

    dst0 = gr.file_sink (gr.sizeof_float, "noise.dat")
    dst1 = audio.sink (sampling_freq)
    dst2 = gr.file_sink (gr.sizeof_float, "scram.dat" )

    mul = gr.multiply_ff ()

    fg.connect ( src0, dst0 )
    fg.connect ( src0, (mul, 0) )
    fg.connect ( src1, (mul, 1) )
    fg.connect ( mul, dst1 )
    fg.connect ( mul, dst2 )

    return fg

if __name__ == '__main__':
    fg = build_graph ()
    fg.start ()
    raw_input ('Press Enter to quit: ')
    fg.stop ()