announcement-box/bin/pa-lib

#!/bin/bash

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
export ROOT=`dirname "$DIR"`
export SOUNDS=$ROOT/sounds

export PLAYER=mplayer
export SPEAK=espeak-ng

ALARM_PID=-1
STATIC_PID=-1

function info() {
	echo "[INFO]" $@
}

function play() {
	cat /dev/null | $PLAYER $@ > /dev/null 2>&1
}

function pa-volume() {
	amixer cset numid=3,iface=MIXER,name='Line Out Playback Volume' $1 > /dev/null
}

function pa-volume-normal() {
	info "Volume set to Normal"
	pa-volume 15
}

function pa-volume-loud() {
	info "Volume set to HIGH!"
	pa-volume 25
}

function pa-volume-loud-if-inactive() {
	LAST_ACTIVE=`human-activity-ago`
	if [[ $LAST_ACTIVE > 200 ]]; then
		info "Human is inactive. Last activity: $LAST_ACTIVE seconds ago."
		pa-volume-loud
	else
		info "Human is active. Setting only normal volume."
		pa-volume-normal
	fi
}

function pa-volume-quiet() {
	info "Volume set to low"
	pa-volume 8
}

function pa-preheat() {
	info "PA Preheating"
	pa-power off
	pa-volume-normal
	pa-static-start 40
	play $SOUNDS/announcement_4-tone_up_quick.ogg
	pa-power on
	info "PA Ready"
}

function pa-shutdown() {
	info "PA Shutdown"
	pa-power off
	pa-volume-normal
	killall $PLAYER >/dev/null 2>&1
}

function pa-announcement() {
	info " DING   DONG "
	play $SOUNDS/announcement_4-tone_up_smooth.ogg
}

function pa-announcement-quick() {
	info " Ding Dong "
	play $SOUNDS/announcement_4-tone_up_smooth_quick.ogg
}

function pa-announcement-quickest() {
	info " ding-dong "
	play $SOUNDS/announcement_4-tone_up_quickest.ogg
}

function pa-alarm-start() {
	info "Alarm started"
	kill $ALARM_PID 2>/dev/null
	play -loop 0 $SOUNDS/alarm_simple.ogg &
	ALARM_PID=$!
}

function pa-alarm-stop() {
	info "Alarm stopped"
	kill $ALARM_PID 2>/dev/null
}

function pa-static-start() {
	kill $STATIC_PID 2>/dev/null
	play -loop 0 -volume ${1:--1} -softvol $SOUNDS/static.ogg &
	STATIC_PID=$!
}
function pa-static-stop() {
	kill $STATIC_PID 2>/dev/null
}

function pa-say() {
	info "Say: $@"
	cat /dev/null | $SPEAK "$@"
}