#!/usr/bin/perl
# aac2ogg - A quick and dirty aac to ogg vorbis converter
# $Id: aac2ogg 325 2006-10-16 09:42:58Z zerodogg $
# Copyright (C) Eskild Hustvedt 2006
#
# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

use strict;
use warnings;

# Usage: InPath(command)
sub InPath ($) {
	foreach (split /:/, $ENV{PATH}) { if (-x "$_/@_" and ! -d "$_/@_" ) {   return 1; } } return 0;
}

die("Unable to find mplayer\n") unless InPath("mplayer");
die("Unable to find faad\n") unless InPath("faad");
die("Unable to find oggenc\n") unless InPath("oggenc");

$| = 1;
foreach my $file (@ARGV) {
	my %FileInfo = (
		title => "unknown",
		artist=> "unknown",
		album => "unknown",
		track => 00,
	);
	my $TempFile = "convert_temp.wav";
	print "$file\n";
	my $TempInfo = qx/faad -i $file 2>&1/;
	foreach my $line (split(/\n/, $TempInfo)) {
		foreach my $check (qw/title artist track album/) {
			if($line =~ s/^$check:\s+//) {
				$FileInfo{$check} = $line;
				last;
			}
		}
	}
	print " $FileInfo{title} by $FileInfo{artist} on $FileInfo{album}\n";
	print " Converting to wav...";
	system("mplayer -ao pcm:file='$TempFile' $file &>/dev/null");
	print "done. Encoding to ogg...";
	my $OutName = "$FileInfo{track}-$FileInfo{artist}-$FileInfo{title}.ogg";
	$OutName =~ s/\s+/_/g;
	$OutName =~ s/\(?\)?,?'?"?//g;
	if($OutName =~ /^\d-/) {
		$OutName = "0$OutName";
	}
	foreach(keys(%FileInfo)) {
		$FileInfo{$_} =~ s/'/\\'/g;
	}
	system("oggenc -q 5 $TempFile --tracknum $FileInfo{track} --title '$FileInfo{title}' --album '$FileInfo{album}' --artist '$FileInfo{artist}' -o '$OutName' &>/dev/null");
	print "done. Written to $OutName\n";
	unlink($TempFile);
}