ebu-plot

#!/bin/bash
# Wrapper for PowerShell script for creating loudness plots of audio files
#
# Usage: ebu-plot <infiles>
#
# Original author of PowerShell script:
# User "L5730"

# https://www.audiosciencereview.com/forum/index.php?threads/offline-loudness-lufs-plotting.19296/
# Original info:Generates Loudness plots
# uses ffmpeg to generate loudness data
# formats into csv
# uses gnuplot to draw graphs

W=1280
H=720

#Check for audio files
NUMARG=0
for file in "$@"; do
if [ "${file##*.}" == wav ] || [ "${file##*.}" == aif ] || [ "${file##*.}" == aiff ] || [ "${file##*.}" == flac ] || [ "${file##*.}" == ogg ] || [ "${file##*.}" == opus ] || [ "${file##*.}" == mp3 ] || [ "${file##*.}" == wv ];
then
	((NUMARG=NUMARG+1))
fi
done

# Check availability of dependencies
function checkAvail()
{
	which "$1" >/dev/null 2>&1
	ret=$?
	if [ $ret -ne 0 ]
	then
		echo "tool \"$1\" not found." >&2
		exit 1
	fi
}

for tool in {pwsh,ffmpeg,gnuplot}; \
	do checkAvail "$tool"; done

# Command usage check
if [ $# -eq 0 ]
then
	echo "Usage: ebu-plot <input files>"
	exit
elif [ $NUMARG -eq 0 ]
then
	echo "No compatible audio files present. ebu-plot accepts wav, aiff, flac, mp3, ogg, opus and wavpack."
	exit
else
	:
fi

SKIPPED=0
SKIPFILE=$(mktemp)

path=$(realpath "$1")
dirname="${path%/*}"
mkdir -p "$dirname/ebu-plot"

for file in "$@"; do

if [ "${file##*.}" == wav ] || [ "${file##*.}" == aif ] || [ "${file##*.}" == aiff ] || [ "${file##*.}" == flac ] || [ "${file##*.}" == ogg ] || [ "${file##*.}" == mp3 ] || [ "${file##*.}" == opus ] || [ "${file##*.}" == wv ]
then
	# Separate name of file 
	FILENAME=${file##*/}
	FNAME="${FILENAME%.*}"
	EXT="${file##*.}"
	echo "Processing $file..."
	pwsh -file /usr/local/bin/ebu-plot.psl -infile "$file" -w $W -h $H -outplot "$dirname/ebu-plot/$FNAME-$EXT-ebu-plot.png"
	echo
elif 	[ -f "$file" ]
then
	((SKIPPED=SKIPPED+1))
	echo "$file" >> $SKIPFILE
else
	:
fi

done
echo "Done!"
echo
echo "Skipped items: $SKIPPED"
cat $SKIPFILE
rm $SKIPFILE