Class: EasyTag::Attributes::MP3Attribute
- Inherits:
-
BaseAttribute
- Object
- BaseAttribute
- EasyTag::Attributes::MP3Attribute
- Defined in:
- lib/easytag/attributes/mp3.rb
Constant Summary
Constants inherited from BaseAttribute
Instance Attribute Summary collapse
-
#ivar ⇒ Object
readonly
Returns the value of attribute ivar.
-
#name ⇒ Object
readonly
Returns the value of attribute name.
Attributes inherited from BaseAttribute
Instance Method Summary collapse
- #data_from_frame(frame) ⇒ Object
- #first_frame_for_id(id, iface) ⇒ Object
- #frames_for_id(id, iface) ⇒ Object
-
#initialize(args) ⇒ MP3Attribute
constructor
A new instance of MP3Attribute.
-
#read_all_id3(iface) ⇒ Object
read_all_id3.
- #read_date(iface) ⇒ Object
- #read_field_list_as_key_value(iface) ⇒ Object
-
#read_first_id3(iface) ⇒ Object
read_first_id3.
- #read_int_pair(iface) ⇒ Object
- #read_ufid(iface) ⇒ Object
Methods inherited from BaseAttribute
#call, can_clone?, deep_copy, #default, default_for_type, name_to_ivar, #post_process, #read_audio_property, #read_default, #type_cast, #user_info_lookup
Constructor Details
#initialize(args) ⇒ MP3Attribute
Returns a new instance of MP3Attribute.
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# File 'lib/easytag/attributes/mp3.rb', line 11 def initialize(args) super(args) @id3v2_frames = args[:id3v2_frames] || [] @id3v1_tag = args[:id3v1_tag] || nil # fill default options # ID3 stores boolean values as numeric strings # set to true to enable type casting (post process) @options[:is_flag] ||= false # return entire field list instead of first item in field list @options[:field_list] ||= false end |
Instance Attribute Details
#ivar ⇒ Object (readonly)
Returns the value of attribute ivar.
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# File 'lib/easytag/attributes/mp3.rb', line 9 def ivar @ivar end |
#name ⇒ Object (readonly)
Returns the value of attribute name.
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# File 'lib/easytag/attributes/mp3.rb', line 9 def name @name end |
Instance Method Details
#data_from_frame(frame) ⇒ Object
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# File 'lib/easytag/attributes/mp3.rb', line 34 def data_from_frame(frame) data = nil if frame.is_a?(TagLib::ID3v2::TextIdentificationFrame) field_list = frame.field_list data = @options[:field_list] ? field_list : field_list.first elsif frame.is_a?(TagLib::ID3v2::UnsynchronizedLyricsFrame) data = frame.text elsif frame.is_a?(TagLib::ID3v2::CommentsFrame) data = frame.text elsif frame.is_a?(TagLib::ID3v2::AttachedPictureFrame) data = EasyTag::Image.new(frame.picture) data.desc = frame.description data.type = frame.type data.mime_type = frame.mime_type elsif frame.is_a?(TagLib::ID3v2::UnknownFrame) nil else warn 'no defined frames match the given frame' end data end |
#first_frame_for_id(id, iface) ⇒ Object
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# File 'lib/easytag/attributes/mp3.rb', line 30 def first_frame_for_id(id, iface) frames_for_id(id, iface).first end |
#frames_for_id(id, iface) ⇒ Object
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# File 'lib/easytag/attributes/mp3.rb', line 26 def frames_for_id(id, iface) iface.info.id3v2_tag.frame_list(id) end |
#read_all_id3(iface) ⇒ Object
read_all_id3
gets data from each frame id given only falls back to the id3v1 tag if none found
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# File 'lib/easytag/attributes/mp3.rb', line 65 def read_all_id3(iface) frames = [] @id3v2_frames.each do |f| frames += frames_for_id(f, iface) end data = [] # only check id3v1 if no id3v2 frames found if frames.empty? data << iface.info.id3v1_tag.send(@id3v1_tag) unless @id3v1_tag.nil? else frames.each { |frame| data << data_from_frame(frame) } end data end |
#read_date(iface) ⇒ Object
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# File 'lib/easytag/attributes/mp3.rb', line 121 def read_date(iface) id3v1 = iface.info.id3v1_tag v10_year = id3v1.year.to_s if id3v1.year > 0 v23_year = data_from_frame(first_frame_for_id('TYER', iface)) v23_date = data_from_frame(first_frame_for_id('TDAT', iface)) v24_date = data_from_frame(first_frame_for_id('TDRC', iface)) # check variables in order of importance date_str = v24_date || v23_year || v10_year # only append v23_date if date_str is currently a year date_str << v23_date unless v23_date.nil? or date_str.length > 4 puts "MP3#date: date_str = \"#{date_str}\"" if $DEBUG date_str end |
#read_field_list_as_key_value(iface) ⇒ Object
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# File 'lib/easytag/attributes/mp3.rb', line 105 def read_field_list_as_key_value(iface) kv_hash = {} frame_data = read_all_id3(iface) frame_data.each do |data| key = data[0] values = data[1..-1] key = Utilities.normalize_string(key) if @options[:normalize] key = key.to_sym if @options[:to_sym] kv_hash[key] = values.count > 1 ? values : values.first end kv_hash end |
#read_first_id3(iface) ⇒ Object
read_first_id3
Similar to read_all_id3, but optimized for reading only one frame at max
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# File 'lib/easytag/attributes/mp3.rb', line 85 def read_first_id3(iface) frame = nil @id3v2_frames.each do |f| frame = first_frame_for_id(f, iface) if frame.nil? end if frame.nil? data = iface.info.id3v1_tag.send(@id3v1_tag) unless @id3v1_tag.nil? else data = data_from_frame(frame) end data end |
#read_int_pair(iface) ⇒ Object
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# File 'lib/easytag/attributes/mp3.rb', line 100 def read_int_pair(iface) int_pair_str = read_first_id3(iface).to_s EasyTag::Utilities.get_int_pair(int_pair_str) end |
#read_ufid(iface) ⇒ Object
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# File 'lib/easytag/attributes/mp3.rb', line 138 def read_ufid(iface) frames = iface.info.id3v2_tag.frame_list('UFID') ufid = nil frames.each do |frame| if @handler_opts[:owner].eql?(frame.owner) ufid = frame.identifier break end end ufid end |