export WIDTH=360
export HEIGHT=576
# Width is the luma width. The chroma width and analysis width is half */
export FRAME_RATE=25
export LOWER_FREQUENCY=167

export SAMPLES_PER_FRAME=`expr "$LOWER_FREQUENCY" \* "$WIDTH" / 2 \
	/ "$FRAME_RATE"`
echo SAMPLES_PER_FRAME=$SAMPLES_PER_FRAME
if [ "$#" -ge 1 ]
then
	echo -e "\nTwibright Reflectoscope high performance realtime music analyser" >&2
	echo -e "\nUsage: rfs_enc <sound_file>" >&2
	echo -e "\nwhere <sound_file> is playable by mplayer" >&2
	echo -e "GAIN sets the sensitivity of the analyzer / brightness of" \
		"the output. Default 1 (just no clipping)" >&2
	echo -e "BANDWIDTH sets the selectivity / bandwidth in semitones. Default 0.6. The bigger the quicker display.\n" \
		>&2
	exit 1
fi
if [ `expr "$WIDTH" % 2` -ne 0 ]
then
	echo Width must be even. >&2
	exit 1
fi
SAMPLE_RATE=`expr "$SAMPLES_PER_FRAME" \* "$FRAME_RATE"`
echo SAMPLE_RATE="$SAMPLE_RATE"

FAST_FRAME_RATE=`expr $FRAME_RATE + 1`
# To make sure mplayer is eager to consume frames 

make sf && arecord -f S16_LE -c1 -r"$SAMPLE_RATE" -t raw | tee captured.raw | \
./sf  \
| mplayer - -demuxer rawvideo -rawvideo fps="$FAST_FRAME_RATE":w="$WIDTH":h="$HEIGHT":yuy2 -nokeepaspect -aspect 1.333