PulseAudio custom sinks/monitors

#!/bin/bash

if [ $# -ne 1 ]; then
    echo "Usage: $0 <stream name>"
    exit 1
fi

get_sink_id () {
    NAME=${1}
    ID=`pacmd list-sinks\
        | grep -E "^\s*name:|^\s*module:"\
        | grep -A 1 -E "^\s*name: <${NAME}>"\
        | grep -oP "module: \K[0-9]+"`

    echo $ID
}

get_default_sink_name () {
    NAME=`pacmd list-sinks\
            | grep -A 1 -E "^\s+\* index:"\
            | tail -n 1\
            | grep "name:"\
            | sed "s/^\s*name: <\([^>]\+\)>.*/\1/"`

    echo $NAME
}

# https://askubuntu.com/questions/355082/pulseaudio-loopback-unload-audio-output-devices

# pacmd list-sinks | grep -E "^\s*name:"
#DEFAULT_SINK_NAME="alsa_output.pci-0000_07_00.4.analog-stereo"
DEFAULT_SINK_NAME=$(get_default_sink_name)
CUSTOM_SINK_NAME="${1}"
#echo $DEFAULT_SINK_NAME
#echo $CUSTOM_SINK_NAME

if [ -z "${DEFAULT_SINK_NAME}" ]; then
    echo "Failed to get the default sink name"
    exit 1
fi

pactl load-module module-null-sink sink_name=${CUSTOM_SINK_NAME} sink_properties=device.description=${CUSTOM_SINK_NAME}
pactl load-module module-loopback source=${CUSTOM_SINK_NAME}.monitor sink=${DEFAULT_SINK_NAME}