flac2mp3dir.sh

flac2mp3dir.sh

#!/bin/bash

# Author: Gabriel Burca (gburca dash flac2mp3dir at ebixio dot com)
# Version: 1.0
#
# Copyright (C) 2006-2009  Gabriel Burca (gburca dash flac2mp3dir at ebixio dot com)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.


set -o nounset
set -o errexit

function usage () {
    cat << EOF
Usage:
$0 source/dir dest/dir

All wav/flac files in source/dir and its subdirectories will be converted to
mp3 and placed in dest/dir while maintaining the directory structures. ID3
tags will also be copied from flac to mp3 files.

Existing files (mp3 or flac) will not be overwritten.
Source and destination directories can be the same.

EOF
}

function absname () {
	# Returns the absolute filename of a given file or directory.
	if [ -d "$1" ] ; then   # Only a directory name.
		dir="$1"
		file=""
	elif [ -f "$1" ] ; then # Strip off and save the filename.
		dir=$(dirname "$1")
		file="/"$(basename "$1")
	else
		# The file did not exist.
		# Return null string as error.
		echo
		return 1
	fi
 
	# Change to the directory and display the absolute pathname.
	cd "$dir"  > /dev/null
	echo "${PWD}${file}"
}

function flac2mp3 () {
	INF="$1"
	OUTF=`echo "$INF" | sed 's/\.flac$/.mp3/'`
	PWD=`pwd`
	SUBDIR=${PWD:$SRCDIRLEN}

	INF="$PWD/$INF"
	OUTF="$DESTDIR$SUBDIR/$OUTF"
	#echo "$INF ... $PWD $SRCDIRLEN $SUBDIR $OUTF"

	if [ -e "$OUTF" ] ; then
		if [ "$OUTF" -ot "$INF" ] ; then
			# Comment the return out to re-generate old files
			return
			echo "*** Re-converting old file: $OUTF"
			rm -f "$OUTF"
		else
			echo "*** Skip flac2mp3! Output file already exists: $OUTF"
			return
		fi
	fi

	if [ ! -e "$DESTDIR$SUBDIR" ] ; then
		mkdir -p "$DESTDIR$SUBDIR"
	fi

	# Convert flac to mp3
	echo "${INDENT}flac2mp3 Converting $INF => $OUTF"
	flac -c -d "$INF" | lame --preset standard --replaygain-accurate - "$OUTF"

	# Copy tags to new file
	id3 -D "$INF" -1 -2 "$OUTF"

	# Copy non-flac/non-wav (folder.jpg, etc...) files to dest/dir
	if [[ ! -e "$DESTDIR$SUBDIR/folder.jpg" && -e "folder.jpg" ]] ; then
		cp folder.jpg "$DESTDIR$SUBDIR"
	fi
}

function wav2mp3 () {
	INF="$1"
	OUTF=`echo "$INF" | sed 's/\.wav$/.flac/'`

	if [ -e "$OUTF" ] ; then
		echo "*** Skip wav2mp3! Output file already exists: $OUTF"
		return
	fi

	echo "${INDENT}wav2mp3 Converting $INF => $OUTF"
	flac -V -o "$OUTF" "$INF"
	flac2mp3 "$OUTF"
}

function traveldir ()
{
	dir="$1"

	pushd "$dir" > /dev/null
	echo "Entering: `pwd`"

	for a in *
	do
		if test -d "$a" ; then
			traveldir "$a"
		else
			if [[ `expr match "$a" '.*\\.flac$'` > 0 ]] ; then
				flac2mp3 "$a"
			elif [[ `expr match "$a" '.*\\.wav$'` > 0 ]] ; then
				wav2mp3 "$a"
			else
				echo "${INDENT}Skipping: $a"
			fi
		fi
	done
	popd > /dev/null
}

################################################################################
# main()
################################################################################

if [[ $# < "2" ]] ; then
	usage
	exit 1
fi

SRCDIR="$1"
DESTDIR="$2"

if [[ ! -e "$DESTDIR" ]] ; then
	mkdir -p "$DESTDIR"
fi

if [[ ! -e "$SRCDIR" ]] ; then
	echo "$SRCDIR does not exist!"
	exit 2
fi

# Get absolute directories
SRCDIR=$(absname "$SRCDIR")
DESTDIR=`absname "$DESTDIR"`

SRCDIRLEN=`expr length "$SRCDIR"`
INDENT="    "

pushd . > /dev/null
traveldir "$SRCDIR"
popd > /dev/null