Class: Feep::Base

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

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Base

main entry point



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# File 'lib/feep.rb', line 13

def initialize(options)
  @options = options
  configure_sound(options)
end

Instance Method Details

#configure_sound(options) ⇒ Object

takes CLI options, massages them, and passes them to the sound generation methods



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# File 'lib/feep.rb', line 20

def configure_sound(options)
  ### A. Check non-essential options
  if !WAVE_TYPES.include?(options[:waveform])
    print_error(ERROR_MSG[:invalid_waveform])
  end

  # Convert ms to secs in order to multiply the sample rate by
  duration_s = (options[:duration].to_f / 1000)

  # Make the samples to write a nice integer
  samples_to_write = (SAMPLE_RATE * duration_s).to_i

  ### B. Set frequency/note, or group of frequencies/notes, to play

  # Is it a chord, scale, or single note?
  if options[:freq_or_note].include?(',')
    # yes, it's a chord, so create threads
    threads = []
    options[:freq_or_note].split(',').each do |note|
      sound_to_play = Utils.convert_note_to_freq(note)
      output_filename = "#{options[:waveform]}_#{sound_to_play}Hz_#{options[:volume].to_f}_#{options[:duration]}.wav"
      threads << Thread.new {
        SoundPlayer.new.play_note(sound_to_play, output_filename, samples_to_write, options) 
      }
    end
    threads.each { |th| th.join }
  else
    # it's a scale
    if options[:scale]
      Feep::Scale.new.play_scale(options)
    else
      # no, it's a single note
      sound_to_play = Utils.convert_note_to_freq(options[:freq_or_note])
      output_filename = "#{options[:waveform]}_#{sound_to_play}Hz_#{options[:volume].to_f}_#{options[:duration]}.wav"
      SoundPlayer.new.play_note(sound_to_play, output_filename, samples_to_write, options)
    end
  end
end