Module: ID3Lib::Frame

Defined in:
lib/id3lib.rb

Overview

:nodoc:

Class Method Summary collapse

Class Method Details

.field(libframe, id) ⇒ Object 



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# File 'lib/id3lib.rb', line 391

def self.field(libframe, id)
  libframe.get_field(Info.field(id)[NUM])
end

.read(libframe) ⇒ Object 



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# File 'lib/id3lib.rb', line 329

def self.read(libframe)
  frame = {}
  info = Info.frame_num(libframe.get_id)
  frame[:id] = info[ID]

  info[FIELDS].each do |field_id|
    libfield = field(libframe, field_id)
    unless libfield
      warn "id3lib-ruby: Invalid field #{field_id.inspect} in " \
           "#{frame[:id].inspect}, please report this as a bug."
      next
    end
    frame[field_id] =
      case Info::FieldType[libfield.get_type]
      when :integer
        libfield.get_integer
      when :binary
        libfield.get_binary
      when :text
        if libfield.get_encoding > 0
          libfield.get_unicode
        else
          libfield.get_ascii
        end
      end
  end

  frame
end

.write(frame, libframe) ⇒ Object 



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# File 'lib/id3lib.rb', line 359

def self.write(frame, libframe)
  if textenc = frame[:textenc]
    field(libframe, :textenc).set_integer(textenc)
  end

  frame.each do |field_id, value|
    next if field_id == :textenc
    unless Info.frame(frame[:id])[FIELDS].include?(field_id)
      # Ignore invalid fields
      next
    end

    libfield = field(libframe, field_id)
    next unless libfield
    case Info::FieldType[libfield.get_type]
    when :integer
      libfield.set_integer(value)
    when :binary
      libfield.set_binary(value)
    when :text
      if textenc and textenc > 0 and
         [:text, :description, :filename].include?(field_id)
        # Special treatment for Unicode
        libfield.set_encoding(textenc)
        libfield.set_unicode(value)
      else
        libfield.set_ascii(value)
      end
    end
  end
end