// Fancy FFT of the song
// Erin K 09/20/08
// RobotGrrl.com
// ------------------------
// Based off the code by Tom Gerhardt
// thomas-gerhardt.com


import processing.core.*;
import ddf.minim.analysis.*;
import ddf.minim.*;

AudioPlayer jingle;
FFT fftLog;

int lastPosition;
int canvasW = 1024;
int canvasH = 600;
int baseLine = 700;
int sampleCount = 0;
int sizew = 20;
int sizeh = 15;

void setup() {
  size(canvasW, canvasH);
  background(0);
  Minim.start(this);
  jingle = Minim.loadFile("BristleBot.mp3");
  fftLog = new FFT(jingle.bufferSize(), jingle.sampleRate());
  fftLog.logAverages(22, 3);
  fftLog.window(FFT.HAMMING);
  jingle.loop();
  colorMode(HSB, 100);
}

void draw() {
  if (jingle.isPlaying() && jingle.position() != lastPosition) {
      lastPosition = jingle.position();
      fftLog.forward(jingle.mix);
      ellipseMode(CENTER);
      smooth();
      noStroke();
      colorMode(HSB, 100);
        
      for(int i = 0; i < fftLog.avgSize(); i++) {         
        if(i < fftLog.avgSize() - 29) {
          fill(color(0,0,0,20));
          rect(0,0,canvasW,canvasH);
        }
          
      float amp = sqrt(sqrt(fftLog.getAvg(i)))*150;
      float h = i * 100/fftLog.avgSize();
      h -= 10;
      h = 100 - h;
      float s = 70;
      float b = amp/3 * 100;
      float a = 100;
      fill(color(h,s,b,a));
       
      float x = i*24 + 150;
      float y = canvasH - amp-50;
      ellipse(x, y, sizew, sizeh);
    }
  }
}

void stop()
{
  jingle.close();
  super.stop();
}