abcde-musicbrainz-tool

   1 #!/usr/bin/perl
   2 # Copyright (c) 2012 Steve McIntyre <93sam@debian.org>
   3 # This code is hereby licensed for public consumption under either the
   4 # GNU GPL v2 or greater, or Larry Wall's Artistic license - your choice.
   5 #
   6 # You should have received a copy of the GNU General Public License along
   7 # with this program; if not, write to the Free Software Foundation, Inc.,
   8 # 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   9 #
  10 # abcde-musicbrainz-tool
  11 #
  12 # Helper script for abcde to work with the MusicBrainz WS API (v2)
  13
  14 use strict;
  15 use encoding "utf8";
  16 use POSIX qw(ceil);
  17 use Digest::SHA;
  18 use MusicBrainz::DiscID;
  19 use WebService::MusicBrainz::Release;
  20 use WebService::MusicBrainz::Artist;
  21 use WebService::MusicBrainz::Response::Track;
  22 use WebService::MusicBrainz::Response::TrackList;
  23 use Getopt::Long;
  24
  25 my $FRAMES_PER_SEC = 75;
  26
  27 my ($device, $command, $discid, @discinfo, $workdir);
  28 Getopt::Long::Configure ('no_ignore_case');
  29 Getopt::Long::Configure ('no_auto_abbrev');
  30 GetOptions ("device=s"       => \$device,
  31             "command=s"      => \$command,
  32             "discid=s"       => \$discid,
  33             "discinfo=i{5,}" => \@discinfo,
  34             "workdir=s"      => \$workdir);
  35
  36 if (!defined($device)) {
  37     $device = "/dev/cdrom";
  38 }
  39 if (!defined($command)) {
  40     $command = "id";
  41 }
  42 if (!defined($workdir)) {
  43     $workdir = "/tmp";
  44 }
  45
  46
  47 if ($command =~ m/^id/) {
  48     my $disc = new MusicBrainz::DiscID($device);
  49
  50     # read the disc in the default disc drive */
  51     if ( $disc->read() == 0 ) {
  52         printf STDERR "Error: %s\n", $disc->error_msg();
  53         exit(1);
  54     }
  55
  56     printf("%s ", $disc->id());
  57     printf("%d ", $disc->last_track_num() + 1 - $disc->first_track_num());
  58
  59     for ( my $i = $disc->first_track_num;
  60           $i <= $disc->last_track_num; $i++ ) {
  61         printf("%d ", $disc->track_offset($i));
  62     }
  63     printf("%d\n", $disc->sectors() / $FRAMES_PER_SEC);
  64     undef $disc;
  65
  66 } elsif ($command =~ m/data/) {
  67     my $ws = WebService::MusicBrainz::Release->new();
  68     my $response = $ws->search({ DISCID => $discid });
  69     my @releases = $response->release_list();
  70     my $releasenum = 0;
  71
  72     foreach my $release (@releases) {
  73         my $a_artist = $release->artist()->name();
  74         my $va = 0;
  75         if ($a_artist =~ /Various Artists/) {
  76             $va = 1;
  77         }
  78         $releasenum++;
  79         open (OUT, "> $workdir/cddbread.$releasenum");
  80         binmode OUT, ":utf8";
  81         print OUT "# xmcd style database file\n";
  82         print OUT "#\n";
  83         print OUT "# Track frame offsets:\n";
  84         # Assume standard pregap
  85         my $total_len = 2000;
  86         my @tracks = @{$release->track_list()->tracks()};
  87         for (my $i = 0; $i < scalar(@tracks); $i++) {
  88             printf OUT "#       %d\n", ceil($total_len * $FRAMES_PER_SEC / 1000.0);
  89             $total_len += $tracks[$i]->duration();
  90         }
  91         print OUT "#\n";
  92         printf OUT "# Disc length: %d seconds\n", $total_len / 1000.0;
  93         print OUT "#\n";
  94         print OUT "# Submitted via: XXXXXX\n";
  95         print OUT "#\n";
  96         print OUT "#blues,classical,country,data,folk,jazz,newage,reggae,rock,soundtrack,misc\n";
  97         print OUT "#CATEGORY=none\n";
  98         print OUT "DISCID=" . $discid . "\n";
  99         print OUT "DTITLE=" . $a_artist. " / " . $release->title() . "\n";
 100         print OUT "DYEAR=\n";
 101         print OUT "DGENRE=\n";
 102
 103         my @tracks = @{$release->track_list()->tracks()};
 104         for (my $i = 0; $i < scalar(@tracks); $i++) {
 105             my $track = $tracks[$i];
 106             my $t_name = $track->title;
 107             if ($va) {
 108                 my $t_artist = $track->artist->name;
 109                 printf OUT "TTITLE%d=%s / %s\n", $i, $t_artist, $t_name;
 110             } else {
 111                 printf OUT "TTITLE%d=%s\n", $i, $t_name;
 112             }
 113         }
 114
 115         print OUT "EXTD=\n";
 116         for (my $i = 0; $i < scalar(@tracks); $i++) {
 117             printf OUT "EXTT%d=\n", $i;
 118         }
 119         print OUT "PLAYORDER=\n";
 120         print OUT ".\n";
 121         close OUT;
 122     }
 123 } elsif ($command =~ m/calcid/) {
 124 # Calculate MusicBrainz ID from disc offsets; see
 125 # http://musicbrainz.org/doc/DiscIDCalculation
 126
 127     my ($first, $last, $leadin, $leadout, @offsets) = @discinfo;
 128
 129     my $s = Digest::SHA->new(1);
 130     $s->add(sprintf "%02X", int($first));
 131     $s->add(sprintf "%02X", int($last));
 132
 133     my @a;
 134     for (my $i = 0; $i < 100; $i++) {
 135         $a[$i] = 0;
 136     }
 137     my $i = 0;
 138     foreach my $o ($leadout, @offsets) {
 139        $a[$i++] = int($o) + int($leadin);
 140     }
 141     for (my $i = 0; $i < 100; $i++) {
 142        $s->add(sprintf "%08X", $a[$i]);
 143     }
 144
 145     my $id = $s->b64digest;
 146     # CPAN Digest modules do not pad their Base64 output, so we have to do it.
 147     while (length($id) % 4) {
 148         $id .= '=';
 149     }
 150
 151     $id =~ tr#+#.#;
 152     $id =~ tr#/#_#;
 153     $id =~ tr#=#-#;
 154
 155     print $id;
 156 }
 157