ruby-processingでProcessing->Examples->Libraries->Minimの写経、その１

　写経してみたｗ；

サウンド系のライブラリのようだが、http://dev.processing.org/に詳細がないよｗ；

load_library :minim

case :ForwardFFT
when :no
  def setup
  end
  def draw
  end
when :ForwardFFT
  import 'ddf.minim'
  import 'ddf.minim.analysis'
  
  def setup
    size 512,200,P2D
    @minim = Minim.new self
    @jingle = @minim.load_file "jingle.mp3", 2048
    @jingle.loop
    
    @fft = FFT.new @jingle.buffer_size,@jingle.sample_rate
    text_font(create_font("SanSerif",12))
    @window_name = "None"
  end
  
  def draw
    background 0
    stroke 255
    
    @fft.forward(@jingle.mix)
    0.step(@fft.spec_size-1){|i|
      line(i,height,i,height-@fft.get_band(i)*4)
    }
    fill 255
    text "The window being used is: " + @window_name, 5, 20
  end
  
#どう設定すれば良いんだろう
#  def key_pressed
#    case key
#    when 'w'
#      @fft.window(FFT.HAMING)
#      @window_name = "Haming"
#    when 'e'
#      @fft.window(FFT.NONE)
#      @window_name = "None"
#    end
#  end
  
  def stop
    @jingle.close
    @minim.stop
    super.stop
  end
when :BandPassFilter
  import 'ddf.minim'
  import 'ddf.minim.effects'

  def setup
    size 512,200
    @minim = Minim.new self
    @groove = @minim.load_file("groove.mp3")
    @groove.loop
    
    @bpf = BandPass.new 440,20,@groove.sample_rate
    @groove.add_effect @bpf
  end
  
  def draw
    background 0
    stroke 255
    
    (@groove.right.size-1).times{|i|
      x1 = map(i, 0,@groove.buffer_size, 0,width)
      x2 = map(i+1, 0,@groove.buffer_size, 0,width)
      line x1,height/4-@groove.left.get(i)*50, x2,height/4-@groove.left.get(i+1)*50
      line x1,3*height/4-@groove.left.get(i)*50, x2,3*height/4-@groove.left.get(i+1)*50
    }
    
    no_stroke
    fill 255,0,0,60
    rect mouse_x - @bpf.get_band_width/20, 0, @bpf.get_band_width/10, height
  end
  
  def mouse_moved
    pass_band =  map(mouse_x,0,width,100,2000)
    pass_width = map(mouse_y,0,height,50,500)
    
    @bpf.set_freq pass_band
    @bpf.set_band_width pass_width
    @bpf.print_coeff
  end
  
  
  def stop
    @groove.close
    @minim.stop
    super.stop    
  end
when :AddListener
  import 'ddf.minim'
  
  class WaveFormRender
    include Java.ddf.minim.AudioListener
    def initialize
      @left = @right = nil
    end
    
    
    def samples samp
      @left = samp
    end
    
    def samples samp_l, samp_r
      @left,@right = samp_l,samp_r
    end
    
    def draw
      no_fill
      stroke 255

      if @left and @right
        left_drow
        right_drow
      elsif @left
        left_drow
      end
    end
    
    def left_drow
      begin_shape
      0.step(@left.length-1){|i|
        vertex i,height/4 + @left[i]*50
      }
      end_shape
    end
    
    def right_drow
      begin_shape
      0.step(@right.length-1){|i|
        vertex i,3*(height/4) + @right[i]*50
      }
      end_shape
    end
  end
    
  def setup
    size 512,512,P2D
    @minim = Minim.new(self)
    @groove = @minim.loadFile "groove.mp3",1024*8
    @groove.loop
    @waveform = WaveFormRender.new
    @groove.addListener(@waveform)
  end
  
  def draw
    background 0
    
    @waveform.draw
  end
  
  def stop
    @groove.close
    @minim.stop
    super.stop
  end
end