Class: ID3Tag::ID3v2TagHeader

Inherits:
Object
  • Object
show all
Defined in:
lib/id3tag/id3_v2_tag_header.rb

Instance Method Summary collapse

Constructor Details

#initialize(header_chunk) ⇒ ID3v2TagHeader

Returns a new instance of ID3v2TagHeader.



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# File 'lib/id3tag/id3_v2_tag_header.rb', line 3

def initialize(header_chunk)
  @content = StringIO.new(header_chunk)
end

Instance Method Details

#experimental? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/id3tag/id3_v2_tag_header.rb', line 29

def experimental?
  0b10_0000 & flags_byte > 0
end

#extended_header? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/id3tag/id3_v2_tag_header.rb', line 25

def extended_header?
  0b100_0000 & flags_byte > 0
end

#footer_present? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/id3tag/id3_v2_tag_header.rb', line 33

def footer_present?
  0b1_0000 & flags_byte > 0
end

#inspect ⇒ Object 



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# File 'lib/id3tag/id3_v2_tag_header.rb', line 41

def inspect
  "<#{self.class.name} version:2.#{version_number} size:#{tag_size} unsync:#{unsynchronisation?} ext.header:#{extended_header?} experimental:#{experimental?} footer:#{footer_present?}>"
end

#major_version_number ⇒ Object 



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# File 'lib/id3tag/id3_v2_tag_header.rb', line 7

def major_version_number
  @content.seek(3)
  @content.readbyte
end

#minor_version_number ⇒ Object 



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# File 'lib/id3tag/id3_v2_tag_header.rb', line 12

def minor_version_number
  @content.seek(4)
  @content.readbyte
end

#tag_size ⇒ Object 



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# File 'lib/id3tag/id3_v2_tag_header.rb', line 37

def tag_size
  @tag_size ||= get_tag_size
end

#unsynchronisation? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/id3tag/id3_v2_tag_header.rb', line 21

def unsynchronisation?
  0b1000_0000 & flags_byte > 0
end

#version_number ⇒ Object 



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# File 'lib/id3tag/id3_v2_tag_header.rb', line 17

def version_number
  sprintf("%s.%s", major_version_number, minor_version_number)
end