/*
 * Audio
 */

public void writeAudio() {
  ArrayList segments = fract.getSegments();
  int numSegments = segments.size();

  mySound = new AudioChannel();
  mySound.initChannel(numSegments);

  // grab sample values from the fractal
  float[] buffer = new float[numSegments];
  for(int i = 0; i < numSegments; i++) {
    Double curVal = (Double)segments.get(i);
    buffer[i] = curVal.floatValue();
  }

  mySound.samples = buffer;  
  waveDirty = false;
}

public void writeSoundFile(String filename) {
   AudioFile myFile = new AudioFile();
   myFile.open(filename, (float)SR, Ess.WRITE);   
   myFile.write(mySound.samples);
   myFile.close();   
}

// sound buffer can be invalid, but the system
// is still trying to play. this basically says
// we need to regenerate the audio
public void invalidateAudio() {
  if (mySound != null)
    mySound.stop(); 
  waveDirty = true;
}  

void stopAudio() {
  if (mySound != null)
    mySound.stop();
  audioPlaying = false;
}

public void playAudio() {
  audioPlaying = true;
  
  if(waveDirty) return;
  
  if (mySound == null) {
    mySound = new AudioChannel();
  } 
  else { 
    mySound.stop();
  }

  mySound.play(Ess.FOREVER);
}