PulseAudio Volume Control Script

#!/bin/sh
# PulseAudio Volume Control Script
#   2010-05-20 - Gary Hetzel <garyhetzel@gmail.com>
#
#   BUG:    Currently doesn't get information for the specified sink,
#           but rather just uses the first sink it finds in list-sinks
#           Need to fix this for systems with multiple sinks
#

SINK=0
STEP=5
MAXVOL=65537 # let's just assume this is the same all over
#MAXVOL=`pacmd list-sinks | grep "volume steps" | cut -d: -f2 | tr -d "[:space:]"`

getperc(){
    VOLPERC=`pacmd list-sinks | grep "volume" | head -n1 | cut -d: -f3 | cut -d% -f1 | tr -d "[:space:]"`
}

getperc;

up(){
    VOLSTEP="$(( $VOLPERC+$STEP ))";
}

down(){
    VOLSTEP="$(( $VOLPERC-$STEP ))";
    SKIPOVERCHECK=1
}

max(){
    pacmd set-sink-volume $SINK $MAXVOL > /dev/null
}

min(){
    pacmd set-sink-volume $SINK 0 > /dev/null
}

overmax(){
    SKIPOVERCHECK=1
    if [ $VOLPERC -lt 100 ]; then
        max;
        exit 0;
    fi
    up
}

mute(){
    pacmd set-sink-mute $SINK 1 > /dev/null
}

unmute(){
    pacmd set-sink-mute $SINK 0 > /dev/null
}

toggle(){
    M=`pacmd list-sinks | grep "muted" | cut -d: -f2 | tr -d "[:space:]"`
    if [ $M == "no" ]; then
        mute;
    else
        unmute;
    fi
}

case $1 in
up)
    up;;
down)
    down;;
max)
    max
    exit 0;;
min)
    min
    exit 0;;
overmax)
    overmax;;
toggle)
    toggle
    exit 0;;
mute)
    mute;
    exit 0;;
unmute)
    unmute;
    exit 0;;
*)
    echo "Usage: `basename $0` [up|down|min|max|overmax|toggle|mute|unmute]"
    exit 1;;
esac

VOLUME="$(( ($MAXVOL/100) * $VOLSTEP ))"

#echo "$VOLUME : $OVERMAX"

if [ -z $SKIPOVERCHECK ]; then
    if [ $VOLUME -gt $MAXVOL ]; then
        VOLUME=$MAXVOL
    elif [ $VOLUME -lt 0 ]; then
        VOLUME=0
    fi
fi

#echo "$VOLUME: $MAXVOL/100 * $VOLPERC+$VOLSTEP"
pacmd set-sink-volume $SINK $VOLUME > /dev/null
VOLPERC=`pacmd list-sinks | grep "volume" | head -n1 | cut -d: -f3 | cut -d% -f1 | tr -d "[:space:]"`

#osd_cat -b percentage -P $VOLPERC --delay=1 --align=center --pos bottom --offset 50 --color=green&