monitor_mic/monitor_mic.sh

#!/bin/bash
#from https://github.com/linuxmint/cinnamon-spices-applets/blob/master/mic-level%40zamszowy/files/mic-level%40zamszowy/rec.sh
#dependances: sox alsa-utils
#activer la capture avec : amixer set Capture cap (apparemment avec alsamixer ne suffit pas)

set -eu

logger "Demarrage script monitor_mic"

envoie_xmpp () {
   chaine="`hostname` [monitor_mic] : `date +%H:%M:%S` $*"
   logger "Message XMPP a envoyer : $chaine"
   #NEW:
   xmppc -a default -m message chat manuel@servileto.net "$chaine"
}


#readonly rec_time=${1:-0.1}
readonly rec_time=0.5

if amixer_out=$(amixer get Capture) && ! [[ $amixer_out =~ \[on\] ]]; then
    sleep "$rec_time"
    echo "-1"
    exit
fi

#RMS     amplitude
while [ true ] ; do
	#rec -n stat trim 0 "$rec_time" 2>&1 | awk '/^Maximum amplitude/ { $3 *= 100; print $3 }'
	#rec -n stat trim 0 "$rec_time"
	commandoutput=$(rec -n stat trim 0 "$rec_time" 2>&1)
	echo $commandoutput
	echo $commandoutput | awk -F'Maximum amplitude: ?' '{print $1}'
	#echo $commandoutput | awk '/^Maximum amplitude/ { $3 *= 100; print $3 }'
	#echo $commandoutput | awk '/^Mean    amplitude/ { $3 *= 100; print $3 }'
	#echo $commandoutput | awk '/^RMS     amplitude/ { $3 *= 100; print $3 }'

	#rec -n stat trim 0 "$rec_time" 2>&1 | awk '/^Mean    amplitude/ { $3 *= 100; print $3 }'

	#envoie_xmpp "⚠ Monitor mic : bruit détecté (Niveau=$capacite_nouveau) !"
	sleep 2
done