Class: Mp3file::ID3v1Tag

Inherits:
Object
  • Object
show all
Defined in:
lib/mp3file/id3v1_tag.rb

Defined Under Namespace

Classes: ID3v1TagFormat

Constant Summary collapse

GENRES =

First group is the original spec, the second are Winamp extensions.

%w{ Blues Classic\ Rock Country Dance Disco Funk Grunge Hip-Hop Jazz 
Metal New\ Age Oldies Other Pop R&B Rap Reggae Rock Techno Industrial 
Alternative Ska Death\ Metal Pranks Soundtrack Euro-Techno Ambient Trip-Hop 
Vocal Jazz+Funk Fusion Trance Classical Instrumental Acid House Game 
Sound\ Clip Gospel Noise AlternRock Bass Soul Punk Space Meditative 
Instrumental\ Pop Instrumental\ Rock Ethnic Gothic Darkwave Techno-Industrial 
Electronic Pop-Folk Eurodance Dream Southern\ Rock Comedy Cult Gangsta 
Top\ 40 Christian\ Rap Pop/Funk Jungle Native\ American Cabaret New\ Wave 
Psychadelic Rave Showtunes Trailer Lo-Fi Tribal Acid\ Punk Acid\ Jazz Polka 
Retro Musical Rock\ &\ Roll Hard\ Rock 

Folk Folk-Rock National\ Folk Swing 
Fast\ Fusion Bebob Latin Revival Celtic Bluegrass Avantgarde Gothic\ Rock 
Progressive\ Rock Psychedelic\ Rock Symphonic\ Rock Slow\ Rock Big\ Band 
Chorus Easy\ Listening Acoustic Humour Speech Chanson Opera Chamber\ Music 
Sonata Symphony Booty\ Bass Primus Porn\ Groove Satire Slow\ Jam Club Tango 
Samba Folklore Ballad Power\ Ballad Rhythmic\ Soul Freestyle Duet Punk\ Rock 
Drum\ Solo A\ capella Euro-House Dance\ Hall }

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ID3v1Tag

Returns a new instance of ID3v1Tag.



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# File 'lib/mp3file/id3v1_tag.rb', line 68

def initialize
  @title = @artist = @album = @year = @comment = @track = @genre_id = @genre = nil
end

Instance Attribute Details

#album ⇒ Object

Returns the value of attribute album.



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# File 'lib/mp3file/id3v1_tag.rb', line 5

def album
  @album
end

#artist ⇒ Object

Returns the value of attribute artist.



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# File 'lib/mp3file/id3v1_tag.rb', line 5

def artist
  @artist
end

#comment ⇒ Object

Returns the value of attribute comment.



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# File 'lib/mp3file/id3v1_tag.rb', line 5

def comment
  @comment
end

#genre ⇒ Object

Returns the value of attribute genre.



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# File 'lib/mp3file/id3v1_tag.rb', line 5

def genre
  @genre
end

#genre_id ⇒ Object

Returns the value of attribute genre_id.



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# File 'lib/mp3file/id3v1_tag.rb', line 5

def genre_id
  @genre_id
end

#title ⇒ Object

Returns the value of attribute title.



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# File 'lib/mp3file/id3v1_tag.rb', line 5

def title
  @title
end

#track ⇒ Object

Returns the value of attribute track.



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# File 'lib/mp3file/id3v1_tag.rb', line 5

def track
  @track
end

#year ⇒ Object

Returns the value of attribute year.



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# File 'lib/mp3file/id3v1_tag.rb', line 5

def year
  @year
end

Class Method Details

.parse(io) ⇒ Object 



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# File 'lib/mp3file/id3v1_tag.rb', line 38

def self.parse(io)
  tag_data = nil

  begin
    tag_data = ID3v1TagFormat.read(io)
  rescue BinData::ValidityError => ve
    raise InvalidID3v1TagError, ve.message
  end

  if tag_data.nil?
    nil
  else
    new.tap { |rv| rv.load_format(tag_data) }
  end
end

Instance Method Details

#load_format(tag_data) ⇒ Object 



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# File 'lib/mp3file/id3v1_tag.rb', line 54

def load_format(tag_data)
  @title = tag_data.title
  @artist = tag_data.artist
  @album = tag_data.album
  @year = tag_data.year
  split_comment = tag_data.comment.split("\x00").reject { |s| s == '' }
  @comment = split_comment.first || ""
  if split_comment.size > 1
    @track = split_comment.last.bytes.first
  end
  @genre_id = tag_data.genre_id
  @genre = GENRES[tag_data.genre_id]
end