#!/bin/sh

# Volume controls

# do nothing if package is removed
FUNC_LIB=/etc/acpi/functions.sh
[ -e $FUNC_LIB ] || exit 0

if [ -e "$DEFAULT" ]; then . "$DEFAULT"; fi
. $FUNC_LIB
action=$1
VOLUME_LABEL='LineOut'
HEADPHONE_LABEL='iSpeaker'

usage() {
    cat <<EOF >&2
Usage: $0 up|down|toggle
EOF
    exit 1
}

AMIXER=/usr/bin/amixer

if ! [ -x $AMIXER ]; then
    echo "$AMIXER not available" >&2
    exit 1
fi
case "$action" in
    toggle)
        # muting $VOLUME_LABEL affects the headphone jack but not the speakers
        $AMIXER  -q sset $VOLUME_LABEL  toggle
        # muting $HEADPHONE_LABEL affects the speakers but not the headphone jack
        $AMIXER -q sset  $HEADPHONE_LABEL toggle
        ;;
    down)
        amixer -q sset PCM 6- unmute
        amixer -q sset $VOLUME_LABEL 2- unmute
        amixer -q sset $HEADPHONE_LABEL unmute
        ;;
    up)
        amixer -q sset PCM  6+ unmute
        amixer -q sset $VOLUME_LABEL 4+ unmute
        amixer -q sset $HEADPHONE_LABEL unmute
        ;;
    *)
        usage
        ;;
esac