scripts: Switch to own volume script

`pavolume` was nice, but my own volume script is just more flexible. No
real changes yet, but includes notification through dunst and works the
same way as `control-brightness` script does, just invoked through
`control-volume`.

scripts/.local/bin/control-volume

@@ -0,0 +1,91 @@
+#!/usr/bin/env sh
+# change Volume in an easy and unified way
+
+direction=$1
+step=${2:-5dB}
+
+# amixer channel to target
+amixer_quiet() {
+  amixer -c 0 "$@" >/dev/null
+}
+amixer_noisy="amixer -c 0 "
+
+# Query amixer for the current volume
+get_volume() {
+  $amixer_noisy get Master | tail -1 | awk '{print $4}' | sed 's/[^0-9]*//g'
+}
+
+# query amixer for mute state (off=muted)
+get_mute() {
+  $amixer_noisy get Master | tail -1 | awk '{print $6}' | sed 's/[^a-z]*//g'
+}
+
+set_volume() {
+  # Change the volume using alsa(might differ if you use pulseaudio)
+  amixer_quiet set Master "$@" >/dev/null
+
+  # Play the volume changed sound
+  # -- this is *extremely* laggy (>8s) on my system, no idea why and no time to find out
+  # canberra-gtk-play -i audio-volume-change -d "changeVolume"
+}
+
+# set mute state (off=mute)
+set_mute() {
+  if [ "$1" = 'off' ]; then
+    amixer_quiet set Master mute
+  elif [ "$1" = 'on' ]; then
+    amixer_quiet set Master unmute
+  else
+    [ "$(get_mute)" = "on" ] && newm=off || newm=on
+    amixer_quiet set Master "$newm"
+  fi
+}
+
+usage() {
+  echo "control-volume up|down [step], with step any int value
+or:     control-brightness set [target], with target any int value 0-100"
+}
+
+send_notification() {
+  if type dunstify 1>/dev/null 2>/dev/null; then
+    notcmd="dunstify -h string:x-dunst-stack-tag:brightness"
+  else
+    notcmd="notify-send -h string:x-dunst-stack-tag:brightness"
+  fi
+
+  vol="$(get_volume)"
+  if [ "$vol" -eq 0 ] || [ "$(get_mute)" = "off" ]; then
+    # Show the sound muted notification
+    $notcmd -a "changeVolume" -u low -i audio-volume-muted "Volume muted"
+  else
+    # Show the volume notification
+    $notcmd -a "changeVolume" -u low -i audio-volume-high \
+      -h int:value:"$vol" "Volume: $vol%"
+  fi
+}
+
+case $direction in
+up)
+  set_volume "${step}+"
+  ;;
+down)
+  set_volume "${step}-"
+  ;;
+mute)
+  set_mute "$step"
+  ;;
+mutetoggle)
+  set_mute
+  ;;
+set)
+  if [ -z "$step" ]; then
+    echo "set option requires target brightness to be specified."
+    return 1
+  fi
+  set_volume "$step"
+  ;;
+*)
+  usage
+  ;;
+esac
+send_notification

sxhkd/.config/sxhkd/sxhkdrc

@@ -21,9 +21,9 @@ super + F7
 XF86MonBrightness{Up,Down}
   control-brightness {up, down} 10
 XF86AudioMute
-  pavolume mutetoggle
+  control-volume mute
 XF86Audio{LowerVolume,RaiseVolume}
-  pavolume {voldown, volup}
+  control-volume {down, up}
 
 # Open terminal emulator (the variable gets set in sh module basic env vars)
 super + Return