Daily Shaarli

script to switch the audio device on Linux

#!/bin/bash

declare -i sinks=(`pacmd list-sinks | sed -n -e 's/\**[[:space:]]index:[[:space:]]\([[:digit:]]\)/\1/p'`)
declare -i sinks_count=${#sinks[*]}
declare -i active_sink_index=`pacmd list-sinks | sed -n -e 's/\*[[:space:]]index:[[:space:]]\([[:digit:]]\)/\1/p'`
declare -i next_sink_index=${sinks[0]}

#find the next sink (not always the next index number)
declare -i ord=0
while [ $ord -lt $sinks_count ];
do
    echo ${sinks[$ord]}
    if [ ${sinks[$ord]} -gt $active_sink_index ] ; then
        next_sink_index=${sinks[$ord]}
        break
    fi
    let ord++
done

#change the default sink
pacmd "set-default-sink ${next_sink_index}"

#move all inputs to the new sink
for app in $(pacmd list-sink-inputs | sed -n -e 's/index:[[:space:]]\([[:digit:]]\)/\1/p');
do
    pacmd "move-sink-input $app $next_sink_index"
done

#display notification
declare -i ndx=0
pacmd list-sinks | sed -n -e 's/device.description[[:space:]]=[[:space:]]"\(.*\)"/\1/p' | while read line;
do
    if [ $(( $ord % $sinks_count )) -eq $ndx ] ; then
        notify-send -i notification-audio-volume-high --hint=string:x-canonical-private-synchronous: "Sound output switched to" "$line"
        exit
    fi
    let ndx++
done;