1 | #!/usr/bin/perl -w |
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2 | use strict; |
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3 | |
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4 | # extract one or more tracks from a FLAC file using its embedded cuesheet |
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5 | # save those tracks as wav or mp3 files |
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6 | # can also run them through a sox filter |
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7 | # TODO: separate sox filter for each track! |
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8 | |
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9 | use Getopt::Long qw{:config no_ignore_case}; |
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10 | use File::Spec::Functions qw{catfile}; |
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11 | use File::Path; |
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12 | use Audio::FLAC::Header; |
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13 | #TODO: put the MusicBrainz lib in a more common location |
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14 | use lib qw{/home/peter/projects/flacrip}; |
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15 | use MusicBrainz; |
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16 | |
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17 | GetOptions( |
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18 | 'D=s' => \my %TRACKS, |
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19 | 't=s' => \my $TYPE, |
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20 | 'x=s' => \my $SOX_FILTER, |
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21 | 'all|a' => \my $ALL, |
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22 | 'dir|d=s' => \my $DIRECTORY, |
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23 | ); |
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24 | |
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25 | my $FLAC_FILE = shift or die "Need a flac file to decode"; |
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26 | |
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27 | # default to mp3 |
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28 | $TYPE ||= 'mp3'; |
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29 | |
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30 | # default the directory to be named like the flac file |
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31 | ($DIRECTORY ||= $FLAC_FILE) =~ s/\.flac$//; |
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32 | |
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33 | my $flac = Audio::FLAC::Header->new($FLAC_FILE) or die "Can't read FLAC header from $FLAC_FILE\n"; |
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34 | |
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35 | # for getting track metadata from MusicBrainz |
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36 | my $info; |
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37 | if ($ALL || $TYPE eq 'mp3') { |
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38 | my $discid = $flac->tags('MBZ_DISCID') or warn "No MBZ_DISCID tag in $FLAC_FILE\n" if $flac; |
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39 | #TODO: calculate TOC and DISCID from cuesheet if there is no MBZ_DISCID tag present |
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40 | |
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41 | #TODO: also get the year from MBZ |
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42 | $info = get_musicbrainz_info($discid); |
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43 | } |
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44 | |
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45 | if ($ALL) { |
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46 | die "Use of --all requires a --directory\n" unless $DIRECTORY; |
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47 | die "No track info found on MusicBrainz for $FLAC_FILE\n" unless $info; |
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48 | use YAML; |
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49 | my $cuesheet = $flac->cuesheet; |
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50 | my $count = scalar grep { /TRACK \d\d/ } @{ $flac->cuesheet }; |
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51 | print "Found $count tracks\n"; |
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52 | #TODO: default to just 01, 02, etc. if there is no $info |
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53 | %TRACKS = map { |
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54 | $_ => catfile($DIRECTORY, sprintf('%02d.%s', $_, to_filename($info->{TRACKS}[$_]{TITLE}))) |
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55 | } (1 .. $count); |
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56 | #print Dump(\%TRACKS); |
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57 | for my $tracknum (sort { $a <=> $b } keys %TRACKS) { |
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58 | printf "%2d: %s\n", $tracknum, $TRACKS{$tracknum}; |
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59 | } |
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60 | mkpath($DIRECTORY); |
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61 | } |
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62 | |
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63 | #TODO: all the option of sorting by tracknum or not |
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64 | #while (my ($tracknum, $title) = each %TRACKS) { |
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65 | for my $tracknum (sort { $a <=> $b } keys %TRACKS) { |
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66 | if ($tracknum !~ /^\d+$/) { |
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67 | warn "Don't know what to do with track number '$tracknum'"; |
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68 | next; |
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69 | } |
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70 | my $start = $tracknum . '.1'; |
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71 | my $end = $tracknum + 1 . '.1'; |
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72 | my $cmd = qq{flac -d --cue $start-$end $FLAC_FILE -o - }; |
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73 | |
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74 | if ($SOX_FILTER) { |
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75 | $cmd .= qq{| sox -t wav - -t wav - $SOX_FILTER }; |
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76 | } |
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77 | |
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78 | my $title = quotemeta($TRACKS{$tracknum}); |
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79 | if ($TYPE eq 'mp3') { |
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80 | # bitrate of 192 |
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81 | $cmd .= qq{| lame -b 192}; |
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82 | # if there is track info, add it as ID3 tags |
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83 | if ($info) { |
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84 | my $track = $info->{TRACKS}[$tracknum]; |
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85 | $cmd .= sprintf q{ --tt %s --ta %s --tl %s --tn %d}, |
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86 | quote($track->{TITLE}), |
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87 | quote($track->{ARTIST}), |
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88 | quote($info->{ALBUM}), |
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89 | $tracknum; |
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90 | } |
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91 | $cmd .= qq{ - $title.mp3}; |
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92 | } elsif ($TYPE eq 'wav') { |
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93 | $cmd .= qq{> $title.wav}; |
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94 | } else { |
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95 | die "Unknown type: $TYPE\n"; |
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96 | } |
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97 | #die $cmd; |
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98 | system $cmd; |
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99 | die "\nFLAC decoding canceled\n" if ($? & 127); |
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100 | |
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101 | print "\n" if $SOX_FILTER; |
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102 | } |
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103 | |
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104 | sub quote { |
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105 | my ($string) = @_; |
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106 | $string =~ s/"/\\"/g; |
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107 | return qq{"$string"}; |
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108 | } |
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109 | |
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110 | sub to_filename { |
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111 | my @strings = @_; |
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112 | #TODO: deal with non-ascii characters (unidecode) e.g. ü --> ue |
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113 | return map { |
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114 | s/[^a-z0-9-_ ]+//gi; |
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115 | s/ +/_/g; |
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116 | lc; |
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117 | } @strings; |
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118 | } |
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