dir2stick

#!/usr/bin/env zsh

# Copyright 2015 Han Boetes <han@boetes.org>
# For license info see http://unlicense.org/

# I use this script to convert all types of music files to .mp3
# and upload them to my stick so I can listen music in my car.
# I just hacked it up in an hour or so so don't expect it
# to actually work.

setopt shwordsplit braceexpand
emulate sh
NULLCMD=:
wd=$PWD

# alias normalize=normalize-audio

for i in mpv mid3v2 normalize-audio lame; do
    if ! which $i >& /dev/null; then
        echo "$i is not installed. I need it. Go get it!"
        end=true
    fi
done
[ "$end" = true ] && exit 1

PLAYERMNT=/ssd/skytraxx/mp3
# PLAYERMNT=/mega/home/han/Desktop/stick
dotdot=${PWD%/*}
dotdot=${dotdot##*/}
TEMPDIR="$TMPDIR/${dotdot}_${PWD##*/}"
TARGET="$PLAYERMNT/${dotdot}_${PWD##*/}"
export LC_ALL=utf8
mkdir -p $TEMPDIR

until df $PLAYERMNT >& /dev/null; do
    echo -n "$PLAYERMNT not yet mounted. Press any key to try again."
    read -sk1 nop
done

i=0
convert=false
for file in *.flac *.ogg *.mpc; do
    [[ $file == '*.'* ]] && continue
    i=$(($i + 1))
    echo "Converting $file to wav format"
    # using `outfile' prevents quoting problems.
    mpv -vo null -ao=pcm --ao-pcm-file="$TMPDIR/outfile$i" "$file" >& /dev/null
    normalize-audio $TMPDIR/outfile$i
    mv $TMPDIR/outfile$i "$TEMPDIR/${file%.*}.wav"
    convert=true
done

cp *.mp3 $TEMPDIR > /dev/null 2>&1 || nothing=true

if [[ $convert = false ]] && [[ $nothing == true ]]; then
    rmdir $TEMPDIR
    echo "Nothing to do here!" >&2
    exit 1
fi

cd $TEMPDIR

if [[ $convert == true ]]; then
    # j=0
    for file in *.wav; do
        # ((j++))
        (
            artistname=$(echo $file|sed -e 's|\(.*\) - .* - .* - .*|\1|')
            albumname=$(echo $file|sed -e 's|.* - \(.*\) - .* - .*|\1|')
            tracknumber=$(echo $file|sed -e 's|.* - .* - \(.*\) - .*|\1|')
            trackname=$(echo $file|sed -e 's|.* - .* - .* - \(.*\)\.wav|\1|')
            lame -V3 -b 192 "$file" "${file%.wav}.mp3"
            rm "$file"
            # Set decent tags for the display.
            mid3v2 -a "$artistname" -A "$albumname" -T "$tracknumber" -t "$trackname" "$_"
            # Since pioneer sorts files on timestamp -- yes really -- set a
            # timestamp which doesn't confuse the order.
            # touch -t $(printf "010101%02i\n" $j) "${file%.wav}.mp3"
        )&
    done
fi

wait # for all conversion processes to finish.
cd $PLAYERMNT
mv $TEMPDIR $TARGET