Class: Bitrate

Inherits:
Object
  • Object
show all
Includes:
SanitizePlugin
Defined in:
lib/what_cd/sanitize_plugins/bitrate.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Bitrate

Returns a new instance of Bitrate.



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# File 'lib/what_cd/sanitize_plugins/bitrate.rb', line 10

def initialize
  @log = Logging.logger[self]
  @log.appenders = Logging.appenders.stdout
  if $verbose
    @log.level = :debug
  else
    @log.level = :info
  end
end

Instance Method Details

#sanitize(context) ⇒ Object 



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# File 'lib/what_cd/sanitize_plugins/bitrate.rb', line 20

def sanitize(context)
  path = context[:path]
  files = Dir.chdir(path) { Dir["*.mp3"] }
  return if files.empty?

  bitrates = {}

  files.each do |file_name|
    file_path = path + file_name
    Mp3Info.open(file_path) do |mp3|
      hash = {:bitrate => mp3.bitrate, :vbr => mp3.vbr}
      bitrates[file_name] = hash
    end
  end

  # TODO: Improve this to print out the violating file name
  vbr_list = bitrates.values.map{|value| value[:vbr] }
  if vbr_list.uniq.count > 1
    raise BitrateError.new("Release has both constant and variable bitrate tracks!")
  else 
    vbr = vbr_list.first
  end

  bitrate_list = bitrates.values.map{|value| value[:bitrate] }
  # Remove duplicates
  bitrate_list = bitrate_list.uniq

  # If the only vbr value is false, this is CBR
  if not vbr and bitrate_list.uniq.count > 1
    raise BitrateError.new("Release tracks are constant bit rate but multiple bitrates found!")
  else
    bitrate = bitrate_list.first
  end

  if vbr
    @log.info "Variable bitrate detected"
  else
    @log.info "Constant bitrate detected at #{bitrate} kbps"
  end

  return context
end