//import minim library
import ddf.minim.*;
import ddf.minim.signals.*;


//initialize native minim functions and saw wave
Minim minim;
AudioOutput out;
MouseSaw msaw;


//image of graph, drawing the lines is the same effect as drawing pixels but pixels are easier to read so we go with pixels
PImage a;
boolean onetime = true;
//size of applet equals size of audio spectrum
int[] aPixels = new int[300*300];
//direction of reading pixels
int direction = 1;

float signal;

void setup() 
{
  size(300, 300);

  PFont fontA= loadFont("Courier.vlw");
  textFont(fontA,12);

  stroke(255);
  a = loadImage("Picture8.png");
  for(int i=0; i<width*height; i++) {
    aPixels[i] = a.pixels[i];
    
  }


  minim = new Minim(this);

  out = minim.getLineOut(Minim.STEREO, 2048);
  msaw = new MouseSaw();
  // adds the signal to the output
  out.addSignal(msaw);
}

void draw(){

 // frameRate(30);

  if (signal > width-1 || signal < 0) { 
    direction = direction * -1; 
  }

 
    //normal signal direction
    signal += (0.3*direction);  
  


 {
    //loads and pixels to play
    loadPixels();
    for (int i=0; i<width*height; i++) { 
      pixels[i] = aPixels[i];  
    }
    updatePixels();
  } 
 
  //display image and text above slitscan comment this out to see slitscan
  image(a,0,0);
  text("death",240,30);
  text("love",240,148);
  text("money",240,220);
  
    stroke(255);
    //punto above slitscan comment out or not to see more slitscan
 for (int x = 10; x < 300; x += 10){
    point(x, 280);
  }
  
}


// this signal uses the signal (slitscan) position to build a signal
class MouseSaw implements AudioSignal
{
  void generate(float[] samp)
  {
    float range = map(signal, 0, width, 0, 1);
    float peaks = map(signal, 0, height, 1, 20);
    float inter = float(samp.length) / peaks;
    for ( int i = 0; i < samp.length; i += inter )
    {
      for ( int j = 0; j < inter && (i+j) < samp.length; j++ )
      {
        samp[i + j] = map(j, 0, inter, -range, range);
      }
    }
  }

  // this is a stricly mono signal
  void generate(float[] left, float[] right)
  {
    generate(left);
    generate(right);
  }
}

//safley stops minim engine
void stop()
{
  out.close();
  minim.stop();

  super.stop();
}