volumectrl

#!/bin/sh

# mute audio with `app_name=Steam mute={true|false|toggle} volumectrl`
# set volume with `app_name=Steam volume={0 ... 1.0} volumectrl`
# or both at once


usage(){
    echo "usage: volumectrl [-n Steam ] [ [-m] | [-u] | [-t] ] [-v] | [-h]"
}

while [ "$1" != "" ]; do
    case $1 in
        -n | --name )           shift
                                app_name=$1
                                ;;
        -m | --mute )           mute=true
                                ;;
        -u | --unmute )         mute=false
                                ;;
        -t | --toggle )         mute=toggle
                                ;;
        -v | --volume )         volume=1.0
                                ;;
        -h | --help )           usage
                                exit
                                ;;
    esac
    shift
done

current_sink_num=''
sink_num_check=''
app_name_check=''

pactl list sink-inputs |while read line; do \
    sink_num_check=$(echo "$line" |sed -rn 's/^Sink Input #(.*)/\1/p')
    if [ "$sink_num_check" != "" ]; then
        current_sink_num="$sink_num_check"
    else
        app_name_check=$(echo "$line" \
            |sed -rn 's/application.name = "([^"]*)"/\1/p')
        if [ "$app_name_check" = "$app_name" ]; then
            echo "$current_sink_num" "$app_name_check"

            if [ "$mute" != "" ]; then
                pactl set-sink-input-mute "$current_sink_num" $mute
                exit
            fi
            if [ "$volume" != "" ]; then
                pactl set-sink-input-volume "$current_sink_num" $volume
                exit
            fi
        fi
    fi
done