#!/bin/sh
base=~/.icons/Paper-Mono-Dark/24x24/panel/audio-volume
  high=$base-high.svg
medium=$base-medium.svg
   low=$base-low.svg
 muted=$base-muted.svg

# TODO: doesn't work if no master mixer, eg usb dac
ident="iface=MIXER,name=Master Playback Volume"
eval $(amixer cget "$ident" | grep -o 'max=\d\+')

while true; do
	# XXX: assume mono, could be different
	vol=$(amixer get Master | grep 'Mono:')
	mute=$(echo "$vol" | cut -d ' ' -f 8)
	vol=$(expr $(echo "$vol" | cut -d ' ' -f 5) \* 100 / $max \* 100 / 100)
	if [ $mute = '[off]' ]; then
		echo $muted
	elif [ $vol -ge 75 ]; then
		echo $high
	elif [ $vol -ge 50 ]; then
		echo $medium
	elif [ $vol -ge 25 ]; then
		echo $low
	else
		echo $muted
	fi
	sleep 2
done