Commit f69aa01e authored by Arnaud Blanchard's avatar Arnaud Blanchard

Graph sound from file or microphone

parent 78e05e62
#Use your $PATH to find bash
#!/usr/bin/env bash
# Basic Libraries And Applications for Robotics (BLAAR)
# Copyright ETIS — ENSEA, University of Cergy-Pontoise, CNRS (2011 - 2017)
# Author: Arnaud Blanchard
# This software is governed by the CeCILL v2.1 license under French law and abiding by the rules of distribution of free software.
# You can use, modify and/ or redistribute the software under the terms of the CeCILL v2.1 license as circulated by CEA, CNRS and INRIA at the following URL "".
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# users are provided only with a limited warranty and the software's author, the holder of the economic rights, and the successive licensors have only limited liability.
# In this respect, the user's attention is drawn to the risks associated with loading, using, modifying and/or developing or reproducing the software by the user in light of its specific status of free software,
# that may mean that it is complicated to manipulate, and that also therefore means that it is reserved for developers and experienced professionals having in-depth computer knowledge.
# Users are therefore encouraged to load and test the software's suitability as regards their requirements in conditions enabling the security of their systems and/or data to be ensured  and, more generally, to use and operate it in the same conditions as regards security.
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blaar_init_options "Graph the frequency spectrum from the microphone or a sound file(-f)"
blaar_add_option device D "" "device_name" "device to use for the microphone"
blaar_add_option filename f "" "filename" "file to load the sound from"
blaar_add_option frequency F "" "frequency" "frequency of a pure sound"
blaar_add_option size s "" "integer" "number of itmes per sample" "4096"
blaar_add_option samplerate S "" "integer" "Samplerate of the sound acquisition" "44100"
blaar_add_option gain g "" "real" "gain to apply" "1"
blaar_add_option xmax X "" "real" "maximal values on absisca to display"
blaar_parse_args "$@"
[ $device ] && device_option="-D $device" || device_option=""
[ $filename ] && file_option="-f=$filename" || file_option=""
[ $xmax ] && xmax_option="--xmax=$xmax" || xmax_option=""
[ $frequency ] && frequency_option="-F$frequency" || frequency_option="" -S$samplerate -s$size -o.sound$$ $file_option $device_option $frequency_option |
o_gnuplot --label-max=$(calc "$size/$samplerate*1000") --text="set xlabel 'Time (ms)';set ylabel 'Amplitude'" --min=-$(calc 1/$gain) --max=$(calc 1/$gain) $xmax_option
#specify the output names allows you to erase them later
#remove the used blc_channels
blc_channels --unlink /sound$$
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