audio

#!/bin/bash

# Configuration
###############


# Functions
###########
function show_help {
    echo "Help Text"
    echo "Usage: $0 [options]"
    echo "Options:"
    echo -e "-h\tShow this help"
    echo -e "-o\tSet output device (requires 'speakers', 'tv', or 'headphones')"
    # echo -e "-s\tSet output to speakers"
}

# Ask a question, defaults to yes
function yes_no_question () {
    read -r -p "$1 [Y/n] " response
    response=${response,,}
    if [[ "$response" =~ ^(yes|y|)$ ]]; then
        return 0
    else
        return 1
    fi
}

# Ask a question, defaults to no
function no_yes_question () {
    read -r -p "$1 [Y/n] " response
    response=${response,,}
    if [[ "$response" =~ ^(no|n|)$ ]]; then
        return 0
    else
        return 1
    fi
}

function volume () {
    # get current sink
    sink=`pactl list short sinks | grep RUNNING | cut -f1`
    step="10"
    if [[ "$1" =~ ^(up|u)$ ]]; then
        cmd="pactl -- set-sink-volume $sink +$step%"
    fi
    if [[ "$1" =~ ^(down|d)$ ]]; then
        cmd="pactl -- set-sink-volume $sink -$step%"
    fi
    if [[ "$1" =~ ^(mute|m)$ ]]; then
        cmd="pactl set-sink-mute $sink toggle"
    fi
    echo "Running command '$cmd'..."
    eval "$cmd"
}

function output () {
    sink=`pactl list short sinks | grep $1 | cut -f1`
    echo "Setting default sink to `pactl list short sinks | grep $1`...";
    pactl set-default-sink $1
    echo "Moving current inputs to default sink..."
    pactl list short sink-inputs | while read line
    do
        echo "Moving input: ";
        echo $line | cut -f1 -d' ';
        echo "to sink: $1";
        pactl move-sink-input `echo $line | cut -f1 -d' '` "$1"
    done
}

# Useful Variables
##################
# Directory containing this script
#  (no matter where it is called from)
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
  SOURCE="$(readlink "$SOURCE")"
  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
script_dir="$( cd -P "$( dirname "$SOURCE" )" && pwd )"

# Script
########

# Read Command Line Arguments
while getopts "ho:" opt; do
    case "$opt" in
        h)
            show_help
            exit 0
            ;;
        o)
            output=$OPTARG
            if [[ $output =~ ^(s|speakers)$ ]]; then
                output `pactl list short sinks | awk '/pci.*analog-stereo/ {print $2}'`
            fi
            if [[ $output =~ ^(t|tv)$ ]]; then
                output `pactl list short sinks | awk '/pci.*hdmi/ {print $2}'`
            fi
            if [[ $output =~ ^(h|headphones)$ ]]; then
                # set output for analog, then digital in case one isn't present
                output `pactl list short sinks | awk '/usb.*Logitech/ {print $2}'`
                # output "alsa_output.usb-Logitech_Logitech_G930_Headset-00-Headset.analog-stereo"
                # output "alsa_output.usb-Logitech_Logitech_G930_Headset-00-Headset.iec958-stereo"
            fi
            ;;
        # s)
            # output "alsa_output.pci-0000_00_1b.0.analog-stereo"
        # h)
            # set output for analog, then digital in case one isn't present
            # output "alsa_output.usb-Logitech_Logitech_G930_Headset-00-Headset.analog-stereo"
            # output "alsa_output.usb-Logitech_Logitech_G930_Headset-00-Headset.iec958-stereo"
  esac
done

# Read audio command
shift $((OPTIND-1))
while [ $# -ne 0 ]; do
    command=$1
    echo "Executing audio command '$command'..."
    if [[ "$command" =~ ^(up|u|down|d|mute|m)$ ]]; then
        volume $command
    fi
    shift
done