max=100

if [ $1 = 'source' ]; then
  object="@DEFAULT_AUDIO_SOURCE@"
elif [ $1 = 'sink' ]; then
  object="@DEFAULT_AUDIO_SINK@"
else
  exit 1
fi;

if [ $2 = 'mute' ]; then
  wpctl set-mute $object toggle
  exit 0
fi;

val=$(wpctl get-volume $object | awk '{print $2}') 
val=$(( (100*${val%%.*}) + ${val#*.} ))
val=$(( $val + $2 ))

if [ $val -gt $max ]; then
  val=$max
elif [ $val -lt 0 ]; then
  val=0
fi;



dec=$(( val / 100 ))
frac=$(( val % 100 ))
if [ $frac -lt 10 ]; then
  frac="0$frac"
fi

wpctl set-volume $object "$dec.$frac"