Class: CueSnap::Splitter

Inherits:
Object
  • Object
show all
Defined in:
lib/cuesnap/splitter.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mp3_file, cue_file = nil, options = {}) ⇒ Splitter

Public: Loads an mp3 and a RubyCue cuesheet.

mp3_file - String file path to an mp3 file. cue_file - The path to a cuesheet for the target cue file (default: the

name of the mp3, with .cue added).

options - Hash of options.

no_numbers - No number prefix for tracks.
output_folder - The output folder to use (default: the name
  of the mp3).

Returns the initalized object.

Raises:



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# File 'lib/cuesnap/splitter.rb', line 29

def initialize(mp3_file, cue_file = nil, options = {})
  raise CueSnap::MP3FileNotFound, mp3_file unless File.exists? mp3_file

  @mp3_file = mp3_file
  if cue_file and cue_file.strip != ''
    @cue_file = cue_file
  else
    @cue_file = File.expand_path("#{mp3_filename}.cue", File.dirname(@mp3_file))
  end

  raise CueSnap::CueFileNotFound, @cue_file unless File.exists? @cue_file

  # If cue file is larger than 1MB, raise an error.
  raise CueSnap::CueFileTooLarge if (File.size(@cue_file).to_f / 2**20) > 1

  @options = Hashie::Mash.new options
  @output_folder = @options.output_folder
  @output_folder ||= mp3_filename
end

Instance Attribute Details

#cue_file ⇒ Object (readonly)

Returns the value of attribute cue_file.



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# File 'lib/cuesnap/splitter.rb', line 16

def cue_file
  @cue_file
end

#mp3_file ⇒ Object (readonly)

Returns the value of attribute mp3_file.



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# File 'lib/cuesnap/splitter.rb', line 16

def mp3_file
  @mp3_file
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/cuesnap/splitter.rb', line 16

def options
  @options
end

#output_folder ⇒ Object (readonly)

Returns the value of attribute output_folder.



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# File 'lib/cuesnap/splitter.rb', line 16

def output_folder
  @output_folder
end

Instance Method Details

#escaped_cue_file ⇒ Object

Public: The space-escaped cue file path.



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# File 'lib/cuesnap/splitter.rb', line 116

def escaped_cue_file
  escape_path @cue_file
end

#escaped_mp3_file ⇒ Object

Public: The space-escaped mp3 file path.



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# File 'lib/cuesnap/splitter.rb', line 106

def escaped_mp3_file
  escape_path @mp3_file
end

#escaped_output_folder ⇒ Object

Public: The space-escaped output folder path.



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# File 'lib/cuesnap/splitter.rb', line 111

def escaped_output_folder
  escape_path @output_folder
end

#mp3_filename ⇒ Object

Public: The filename for the mp3 file with the .mp3 extension removed.



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# File 'lib/cuesnap/splitter.rb', line 101

def mp3_filename
  File.basename(@mp3_file, '.mp3')
end

#parse_cue_file ⇒ Object

Internal: Parses the cue file using RubyCue and sets the @cuesheet variable.

Returns nothing.



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# File 'lib/cuesnap/splitter.rb', line 53

def parse_cue_file
  file_contents = File.read @cue_file

  # Try to fix unicode problems
  # use iconv if on Ruby 1.8
  # From: bit.ly/bGmrCnCOPY
  require 'iconv' unless String.method_defined?(:encode)
  if String.method_defined?(:encode)
    file_contents.encode!('UTF-16', 'UTF-8', :invalid => :replace, :replace => '')
    file_contents.encode!('UTF-8', 'UTF-16')
  else
    ic = Iconv.new('UTF-8', 'UTF-8//IGNORE')
    file_contents = ic.iconv(file_contents)
  end

  @cuesheet = RubyCue::Cuesheet.new file_contents
  @cuesheet.parse!
end

#split! ⇒ Object

Public: Splits the mp3 into files based on track_names and saves them to the output folder.

Returns nothing.



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# File 'lib/cuesnap/splitter.rb', line 76

def split!
  # Wait until the last second to parse the cue file, in case the user
  # changes it before we split.
  parse_cue_file

  format = "@p - @t"

  song_count_length = (@cuesheet.songs.length + 1).to_s.length
  number_format = "@N#{song_count_length > 1 ? song_count_length : ''}"
  format = "#{number_format} #{format}" unless @options.no_numbers

  # Got to esape the spaces for the shell
  format = Shellwords.escape format

  command = ['mp3splt',
             "-d #{escaped_output_folder}",
             "-o #{format}",
             "-c #{escaped_cue_file}"]
  command.push '-Q' if @options.quiet
  command.push escaped_mp3_file

  system command.join(' ')
end