#! /bin/zsh
#
# this file:
#   https://dataswamp.org/~incal/conf/.zsh/volume
#
# packages:
#   alsa-utils
#   pulseaudio

CARD=0
DEVICE=pulse

cards () {
    cat /proc/asound/cards
}

change-volume () {
    local vol=$1
    amixer -q -c $CARD -D $DEVICE set Master $vol
}

change-volume-percent () {
    local perc=${1:-97}
    (( $perc )) && change-volume ${perc}%
    amixer sget Master | awk -F "[][]" '/Left:/{print $2}'
}
alias v=change-volume-percent
alias vol=change-volume-percent

increase-volume () { change-volume 1%+ }
decrease-volume () { change-volume 1%- }
alias iii=increase-volume
alias ddd=decrease-volume

mute-unmute () {
    local mute=$1
    amixer -q -c $CARD -D $DEVICE set Master $mute
}
mute   () { mute-unmute mute   }
unmute () { mute-unmute unmute }

mute-after-time () {
    local time=${1:-20}
    sleep $(( $time * 60 ))
    mute
}