/**
 * Arduino Sounds
 *
 * Play WAV or MP3 files when piezo knocks from an Arduino running the
 * "PiezoKnock" sketch or when a computer keyboard key is pressed.
 *
 * Taken from the Minim "trigger" sketch:
 *
 * This sketch demonstrates how to use the <code>trigger</code> method of an <code>AudioSample</code>. <br />
 * <code>AudioSample</code>s can only be triggered, not cue'd and looped
 * or anything else you might do with an <code>Playable</code> object. The advantage, however, is that 
 * an <code>AudioSample</code> can be retriggered while it is still playing, which will cause the sample to 
 * overlap with itself .
 */

import ddf.minim.*;
import processing.serial.*;

String portname = "/dev/tty.usbserial-A4001qa8";  // or "COM8"
Serial port;  // Create object from Serial class

AudioSample sounds[];
String sound_names[] = 
{
  "cat.wav",
  "fx.mp3",
  "electric_wrench.wav",
  "wehoa.mp3",
  "oriental_gong_2.wav",
  "yipee.wav",
  "car_brake.wav"
  // find more wav or mp3 files and put them in the "data" directory
};

void setup()
{ 
  size(400, 400);
  background(0);
  stroke(255);
  // always start Minim before you do anything with it
  Minim.start(this);
  Minim.debugOn();
  sounds = new AudioSample[sound_names.length];
  for( int i=0; i< sound_names.length; i++ ) {
    sounds[i] = Minim.loadSample(sound_names[i], 512);
  }
  
  // Open the port that the board is connected to and use the same speed (19200 bps)
  port = new Serial(this, portname, 19200);

}

void draw()
{
  // do the drawing on events
}

void soundball() {
  int r = int(random(sounds.length));
  println("picked sound #"+r);
  sounds[r].trigger();   // play a random sound

  int x = int(random(0,300));
  int y = int(random(0,300));
  fill(240,0,0);
  ellipse(x,y, 40,40);
  fill(30,0,0);
  ellipse(x,y, 8,8);
}

void serialEvent(Serial p) { 
  char inByte = port.readChar();
  println("received char: "+ inByte);
  if( inByte == '!' ) {  // '!' is end of "knock!"
    soundball();
  }
}

void keyPressed() {
  if(key == ' ') {
    background(40,40,40);  // erase screen
  }
  soundball();
}

void stop()
{
  // always close Minim audio classes when you are done with them
  for( int i=0; i<sounds.length; i++ ) {
    sounds[i].close();
  }
  super.stop();
}