Switch between two PulseAudio sinks

switch-sink.sh

#!/bin/sh

INTEGRATED='pci-0000_0c_00.4'
VIDEOCARD='pci-0000_0a_00.1'

TRAY_APP='volumeicon'
NOTIFICATION_SUMMARY='Audio Output'


die() {
  notify-send "${NOTIFICATION_SUMMARY}" "${1}" -i audio-volume-muted -t 3000
  exit 1
}

integrated=''
videocard=''

for sink in $(pacmd list-sinks | grep -oP '(?<=name: <)[^>]+'); do
  case ${sink} in
    *"${INTEGRATED}"*) integrated=${sink};;
    *"${VIDEOCARD}"*) videocard=${sink};;
  esac
done

if [ -z "${integrated}" ] || [ -z "${videocard}" ]; then
  die 'Failed to inspect'
fi

if [ "$(pactl get-default-sink)" = "${integrated}" ]; then
  sink=${videocard}
  msg='Display'
else
  sink=${integrated}
  msg='Speakers'
fi

if ! pactl set-default-sink "${sink}"; then
  die 'Failed to switch'
fi

notify-send "${NOTIFICATION_SUMMARY}" "${msg}" -i audio-volume-high -t 2000
killall -e ${TRAY_APP} 2> /dev/null
${TRAY_APP} &

The reason why we have to restart volumeicon: Maato/volumeicon#49