Switch PulseAudio sinks

switch-sink.bash

#!/usr/bin/env bash

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

config_path="${XDG_CONFIG_HOME:-$HOME/.config}/switch-sink.conf.bash"
[[ -f ${config_path} ]] || die 'Config not found'
# shellcheck disable=SC1090
source "${config_path}"

declare -A sink_pa_names_map
for full_pa_name in $(pacmd list-sinks | grep -oP '(?<=name: <)[^>]+'); do
  short_pa_name=$(echo "${full_pa_name}" | awk -F. '{OFS=".";NF-=1;$1="";sub(".", "");print}')
  sink_pa_names_map[${short_pa_name}]="${full_pa_name}"
done

current_pa_name="$(pactl get-default-sink)"
next_index=0

declare -a sink_pa_names
declare -A card_human_names_map
for index in "${!CARDS[@]}"; do
  card=${CARDS[${index}]}
  read -r short_pa_name human_name <<< "${card}"
  full_pa_name=${sink_pa_names_map[${short_pa_name}]}
  sink_pa_names+=("${full_pa_name}")
  card_human_names_map["${full_pa_name}"]="${human_name}"
  [[ ${full_pa_name} == "${current_pa_name}" ]] && next_index=$((index + 1))
done

[[ ${next_index} -ge ${#CARDS[@]} ]] && next_index=0

next_sink_pa_name=${sink_pa_names[${next_index}]}
next_sink_human_name=${card_human_names_map[${next_sink_pa_name}]}

pactl set-default-sink "${next_sink_pa_name}" || die 'Failed to switch'
notify-send "${NOTIFICATION_SUMMARY}" "${next_sink_human_name}" -i audio-volume-high -t 2000
[[ -z "${TRAY_APP}" ]] && exit
killall -e "${TRAY_APP}" 2> /dev/null
${TRAY_APP} &

switch-sink.conf.bash

CARDS=(
  'pci-0000_0c_00.4 Speakers'
  'pci-0000_0a_00.1 Display'
  'usb-KTMicro_KT_USB_Audio_2021-06-07-0000-0000-0000--00 USB Card'
)
TRAY_APP='volumeicon'
NOTIFICATION_SUMMARY='Audio Output'