diff options
Diffstat (limited to 'gnuradio-examples/python/hier/audio/dial_tone2.py')
| -rwxr-xr-x | gnuradio-examples/python/hier/audio/dial_tone2.py | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/gnuradio-examples/python/hier/audio/dial_tone2.py b/gnuradio-examples/python/hier/audio/dial_tone2.py new file mode 100755 index 000000000..cbb187a36 --- /dev/null +++ b/gnuradio-examples/python/hier/audio/dial_tone2.py @@ -0,0 +1,84 @@ +#!/usr/bin/env python +# +# Copyright 2004,2005,2006 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., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr +from gnuradio import audio +from gnuradio.eng_option import eng_option +from optparse import OptionParser + +# Top-level block creating a dial tone +# Derives from new class gr.hier_block2 +class dial_tone(gr.hier_block2): + def __init__(self, + sample_rate, # Audio output sample rate (int) + audio_output, # Audio output device + amplitude): # Output volume (0.0-1.0) + + # Call hierarchical block constructor + # Top-level blocks have no inputs or outputs + gr.hier_block2.__init__(self, + "dial_tone", # Block type + gr.io_signature(0,0,0), # Input signature + gr.io_signature(0,0,0)) # Output signature + + # Hierarchical blocks have a set of 'components' (which may + # be themselves hierarchical blocks), mapped to names. + # 'define_component' takes a string and either a hierarchical + # block or an instance of a 'leaf node' (gr_block) block + + # Give names to two sine wave sources and an audio sink + self.define_component("src0", gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 350, amplitude)) + self.define_component("src1", gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 440, amplitude)) + self.define_component("dst", audio.sink(sample_rate, audio_output)) + + # Wire up outputs to inputs. (TODO: convenience functions) + self.connect("src0", 0, "dst", 0) + self.connect("src1", 0, "dst", 1) + +if __name__ == '__main__': + 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)") + parser.add_option("-a", "--amplitude", type="eng_float", default=0.1, + help="set output volume to AMPLITUDE (0.1)") + (options, args) = parser.parse_args() + if len(args) != 0: + parser.print_help() + raise SystemExit, 1 + + # Create an instance of a hierarchical block + top_block = dial_tone(int(options.sample_rate), + options.audio_output, + options.amplitude) + + # Create an instance of a runtime, passing it the top block + # to process + runtime = gr.runtime(top_block) + + try: + # Run forever + runtime.run() + except KeyboardInterrupt: + # Ctrl-C exits + pass |