Created
April 29, 2018 17:05
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Switch current audio output device (or toggle between sinks) – This code is for PulseAudio. I use it in an Xmonad key binding.
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| #!/bin/bash | |
| # Switch the current audio output device. | |
| # Without options: Toggle between two sinks. | |
| # This script works for PulseAudio; pactl must be installed. | |
| printUsage() { | |
| cat <<EOF | |
| usage: $PROGNAME [options] | |
| options: | |
| -d | |
| only switch default sink, not for currently playing streams. | |
| -s SINK_ID | |
| switch to this sink (instead of toggle sink). | |
| -i | |
| interactively select a sink. | |
| -l | |
| list all sinks. | |
| -L | |
| list all current streams (sink inputs). | |
| -h | |
| print help message. | |
| EOF | |
| } | |
| set -o errexit -o pipefail | |
| readonly PROGNAME=${0##*/} | |
| # $1: error message | |
| exitWithError() { | |
| declare msg=${1:-} | |
| echo "$msg" >&2 | |
| exit 1 | |
| } | |
| # $*: command line arguments = "$@" | |
| parseCommandLine() { | |
| # declare options globally and readonly | |
| declare option | |
| while getopts 'hdlLis:' option; do | |
| case $option in | |
| h) | |
| printUsage | |
| exit 0 | |
| ;; | |
| d) | |
| declare -gr SWITCH_DEFAULT_ONLY=1 | |
| ;; | |
| s) | |
| declare -gr SINK_ID=$OPTARG | |
| ;; | |
| i) | |
| declare -gr INTERACTIVE=1 | |
| ;; | |
| l) | |
| declare -gr LIST_SINKS=1 | |
| ;; | |
| L) | |
| declare -gr LIST_STREAMS=1 | |
| ;; | |
| *) printUsage >&2 | |
| exit 1 | |
| ;; | |
| esac | |
| done | |
| shift $((OPTIND-1)) | |
| if [[ -n $SINK_ID && -n $INTERACTIVE ]]; then | |
| exitWithError "error: you cannot use both -s and -i." | |
| fi | |
| if [[ -n $LIST_SINKS && -n $LIST_STREAMS ]]; then | |
| exitWithError "error: you cannot use both -l and -L." | |
| fi | |
| if (( $# != 0 )); then | |
| printUsage | |
| exit 1 | |
| fi | |
| return 0 | |
| } | |
| main() { | |
| parseCommandLine "$@" | |
| if [[ -n $LIST_SINKS ]]; then | |
| pactl list short sinks | |
| exit | |
| fi | |
| if [[ -n $LIST_STREAMS ]]; then | |
| pactl list short sink-inputs | |
| exit | |
| fi | |
| declare numberOfSinks | |
| numberOfSinks=$(pactl list short sinks | wc -l) | |
| if (( numberOfSinks <= 1 )); then | |
| exitWithError "error: only one or zero audo devices available. no switching possible." | |
| fi | |
| declare sinkId | |
| if [[ -n $SINK_ID ]]; then | |
| sinkId=$SINK_ID | |
| elif [[ -n $INTERACTIVE ]]; then | |
| # interactively select a sink | |
| sinkId=$(pactl list short sinks | sed -r 's/alsa_output\.|\.analog-stereo//g' | fzf --delimiter='\t' --with-nth='1,2,5' | awk '{print $1}') | |
| else | |
| declare currentSinkId | |
| currentSinkId=$(pactl list short sinks | grep -F RUNNING | awk 'NR==1{print $1}') | |
| if [[ -z $currentSinkId ]]; then | |
| exitWithError "error: no currently playing sink. use -i or -s." | |
| fi | |
| sinkId=$(pactl list short sinks | grep -v "^$currentSinkId" | awk 'NR==1{print $1}') | |
| if [[ -z $sinkId ]]; then | |
| exitWithError "error: no other sink available." | |
| fi | |
| fi | |
| pactl set-default-sink "$sinkId" | |
| if [[ -z $SWITCH_DEFAULT_ONLY ]]; then | |
| declare i | |
| pactl list short sink-inputs | awk '{print $1}' \ | |
| | while read -r i; do | |
| pactl move-sink-input "$i" "$sinkId" | |
| done | |
| fi | |
| } | |
| main "$@" |
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