/**
  * This applet demonstrates how to use my Sine class with an Ess AudioStream.
  * Moving the mouse left and right will smoothly change the frequency of the sine wave.
  */

import krister.Ess.*;

AudioStream  speaker;
Sine mSine;

void setup() 
{
  size(400, 200);
  smooth();

  // start up Ess
  Ess.start(this);

  // create a new AudioStream
  speaker = new AudioStream();
  // our wave
  mSine = new Sine(440, 0.4f, speaker.sampleRate);  
  // start
  speaker.start();
}

void draw() 
{
  background(0);
  float sc = 0.5;
  for (int i = 0; i < width/sc; i++ )
  {
    stroke(255);
    line(i*sc, height/2 + 100*speaker.buffer[i], (i+1)*sc, height/2 + 100*speaker.buffer[i+1]);
    stroke(0, 255, 0, 64);
    if ( i == 64 ) stroke(0, 255, 0);
    line(i*8, 0, i*8, height);
  }
}

void mouseMoved()
{
  mSine.setFreq( map(mouseX, 0, width, 220, 880) );  
}

void audioStreamWrite(AudioStream s) 
{
  mSine.generate(s);
}

public void stop() 
{
  Ess.stop();
  super.stop();
}