#!/usr/bin/env python

#

# Copyright 2004,2005,2007,2008 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, gru

from gnuradio import audio

from gnuradio.eng_option import eng_option

from optparse import OptionParser

import os

class my_top_block(gr.top_block):

    def __init__(self):

        gr.top_block.__init__(self)

        parser = OptionParser(option_class=eng_option)

        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("-r", "--sample-rate", type="eng_float", default=48000,

                          help="set sample rate to RATE (48000)")

        (options, args) = parser.parse_args ()

        if len(args) != 0:

            parser.print_help()

            raise SystemExit, 1

        sample_rate = int(options.sample_rate)

        ampl = 0.1

        src0 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 350, ampl)

        src1 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 440, ampl)

        dst = audio.sink (sample_rate, options.audio_output)

        self.connect (src0, (dst, 0))

        self.connect (src1, (dst, 1))

if __name__ == '__main__':

    pid = gru.daemonize()

    print "To stop this program, enter 'kill %d'" % pid

    my_top_block().run()