#!/bin/zsh
# Record audio directly to OGG

timestamp=$(date +%F_%R)
basename="$1_$timestamp"
if [[ -z $2 ]]; then quality=0 ; else quality=$2 ; fi

record_cmd="arecord"
record_opts="-c 2 -f dat -M -q"

encode_cmd="oggenc"
encode_opts="-q $quality -Q"
esufx="ogg"

start_mixer='echo Unmute mixer && amixer sset Mic,0 unmute 100% | grep -i playback'
stop_mixer='echo Mute mixer && amixer sset Mic,0 mute | grep -i playback'

if [[ -e $basename.$esufx ]]; then
	print "File $basename.$esufx exists, aborting!"
	exit 1
else
	eval $start_mixer
	echo "Recording started, saving to '$basename.$esufx'."
	trap "" INT # abort gracefully with Ctrl-C
	eval "$record_cmd $record_opts | $encode_cmd $encode_opts - -o $basename.$esufx"
	eval $stop_mixer
	echo "Recording stopped!"
fi