Synchronized volume control for awesome wm

volume_control.sh

#!/bin/bash
# the script comes from this site: customlinux.blogspot.com/2013/02/pavolumesh-control-active-sink-volume.html
# This is an updated version that works with ubuntu 18.04 and sends notifications to awesome window manager via awesome-client. Remember - I'am not an original author of the script.

# finds the active sink for pulse audio and increments the volume. useful when you have multiple audio outputs and have a key bound to vol-up and down
inc='5'
capvol='yes'
maxvol='200'
tmpfile='/tmp/pasink.tmp'

active_sink=`pacmd list-sinks | fgrep '* index' | egrep -o '[0-9]+'`
limit=$(expr 100 - ${inc})
maxlimit=$(expr ${maxvol} - ${inc})

function osd {
	awesome-client     'require("naughty").notify({ title = "Volume", text = "'$1'"})'
}

function volUp {

        getCurVol

        if [ ${capvol} = 'yes' ]
        then
                if [ ${curVol} -le 100 -a ${curVol} -ge ${limit} ]
                then
                        pactl set-sink-volume ${active_sink} 100%
                elif [ ${curVol} -lt ${limit} ]
                then
                        pactl set-sink-volume ${active_sink} +${inc}%
                fi
        elif [ ${curVol} -le ${maxvol} -a ${curVol} -ge ${maxlimit} ]
        then
                pactl set-sink-volume ${active_sink} ${maxvol}%
        elif [ ${curVol} -lt ${maxlimit} ]
        then
                pactl set-sink-volume ${active_sink} +${inc}%
        fi

        getCurVol
        osd ${curVol}
        volSync
}

function volDown {

        pactl set-sink-volume ${active_sink} -${inc}%
        getCurVol
        osd ${curVol}
        volSync

}

function getSinkInputs {

        inputs=`pacmd list-sink-inputs |grep -B 4 'sink: '${1}' ' |awk '/index:/{print $2}' >${tmpfile}`
        input_array=`cat $tmpfile`
}

function volSync {

        getSinkInputs ${active_sink}
        getCurVol

        for each in ${input_array}
        do
                pactl set-sink-input-volume ${each} ${curVol}%
        done

}

function getCurVol {

        curVol=`pacmd list-sinks |grep -wA 15 'index: '${active_sink}'' |grep 'volume:' |egrep -v 'base volume:' |awk -F : '{print $3}' |grep -o -P '.{0,3}%'|sed s/.$// |tr -d ' '`

}

function volMute {

        case "$1" in
                mute)
                        pactl set-sink-mute ${active_sink} 1
                        curVol=0
                        status=1
                ;;
                unmute)
                        pactl set-sink-mute ${active_sink} 0
                        getCurVol
                        status=0
                ;;
        esac

		osd ${curVol}

}

function volMuteStatus {

        curStatus=`pacmd list-sinks |grep -A 15 'index: '${active_sink}'' |awk '/muted/{ print $2}'`

        if [ ${curStatus} = 'yes' ]
        then
                volMute unmute
        else
                volMute mute
        fi

}


case "$1" in
        --up)
                volUp
        ;;
        --down)
                volDown
        ;;
        --togmute)
                volMuteStatus
        ;;
        --mute)
                volMute mute
        ;;
        --unmute)
                volMute unmute
        ;;
        --sync)
                volSync
        ;;
        *)
                echo "usage: volume_control.sh [command] , where command is: --down/--up/--togmute/--mute/--unmute/--sync"
        ;;
esac