#!/usr/bin/env sh
set -ou pipefail

count=`ls -1 *.OGG 2>/dev/null | wc -l`
if [ $count != 0 ]; then
  rename OGG ogg *.OGG
fi
  
count=`ls -1 *.ogg 2>/dev/null | wc -l`
if [ $count != 0 ]; then
    for i in *.ogg; do
        ffmpeg -y  -i "$i" -map_metadata 0:s:a:0 "${i%.*}.mp3" && rm "$i"
    done
fi

count=`ls -1 *.WEBM 2>/dev/null | wc -l`
if [ $count != 0 ]; then
  rename WEBM webm *.WEBM
fi
  
count=`ls -1 *.webm 2>/dev/null | wc -l`
if [ $count != 0 ]; then
    for i in *.webm; do
        ffmpeg -y  -i "$i" -map_metadata 0:s:a:0 "${i%.*}.mp3" && rm "$i"
    done
fi

count=`ls -1 *.OPUS 2>/dev/null | wc -l`
if [ $count != 0 ]; then
  rename OPUS opus *.OPUS
fi
  
count=`ls -1 *.opus 2>/dev/null | wc -l`
if [ $count != 0 ]; then
    for i in *.opus; do
        ffmpeg -y  -i "$i" -map_metadata 0:s:a:0 "${i%.*}.mp3" && rm "$i"
    done
fi

count=`ls -1 *.M4A 2>/dev/null | wc -l`
if [ $count != 0 ]; then
  rename M4A m4a *.M4A
fi
  
count=`ls -1 *.m4a 2>/dev/null | wc -l`
if [ $count != 0 ]; then
    for i in *.m4a; do
        ffmpeg -y  -i "$i" -map_metadata 0:s:a:0 "${i%.*}.mp3" && rm "$i"
    done
fi

shopt -s nullglob
rsgain custom -S -L -a -s i *.mp3 *.flac