/**
* Returns the <sup>10</sup>log() of a value
*
* @return the <sup>10</sup>log()
*/
static double log10(int v) {
double dl = 0.0;
if (v != 0.0) {
dl = Math.log(v) / Math.log(10);
}
return dl;
}
public boolean play() {
try {
if (playState != STOPPED) playStop();
if (audioBytes == null) return false;
DataLine.Info info = new DataLine.Info(Clip.class, format);
clip = (Clip) AudioSystem.getLine(info);
clip.addLineListener(new ClipListener());
long clipStart = (long) (audioBytes.length * getStartTime() / (getDuration() * 1000.0));
long clipEnd = (long) (audioBytes.length * getEndTime() / (getDuration() * 1000.0));
if ((clipEnd - clipStart) > MAX_CLIP_LENGTH) clipEnd = clipStart + MAX_CLIP_LENGTH;
byte[] clipBytes = new byte[(int) (clipEnd - clipStart)];
System.arraycopy(audioBytes, (int) clipStart, clipBytes, 0, clipBytes.length);
clip.open(format, clipBytes, 0, clipBytes.length);
FloatControl panControl = (FloatControl) clip.getControl(FloatControl.Type.PAN);
panControl.setValue((float) panSetting / 100.0f);
double value = (double) gainSetting;
FloatControl gainControl = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);
float dB = (float) (Math.log(value == 0.0 ? 0.0001 : value) / Math.log(10.0) * 20.0);
gainControl.setValue(dB);
double playStartTime = (player.getSeekTime() / 100) * (playGetLength());
clip.setMicrosecondPosition((long) playStartTime);
clip.start();
playState = PLAYING;
return true;
} catch (Exception ex) {
ex.printStackTrace();
playState = STOPPED;
clip = null;
return false;
}
}
public double evaluate(double x) {
return Math.log(x * x + 1) - Math.exp(0.4 * x) * Math.cos(Math.PI * x);
}
/**
* Computes the output property. A {@link java.beans.PropertyChangeEvent} is fired for the output
* property if it differs from the previous value.
*
* @throws VisADException if a VisAD failure occurs.
* @throws RemoteException if a Java RMI exception occurs.
*/
void clock() throws VisADException, RemoteException {
Set domainSet = buoyProfile.getDomainSet();
Real oldLfc;
Real newLfc;
double[] pressures = domainSet.getDoubles()[0];
float[] buoys = buoyProfile.getFloats()[0];
/* Eliminate non-finite pressures and buoyancies. */
int n = 0;
for (int i = 0; i < pressures.length; i++) {
if ((pressures[i] != pressures[i]) || (buoys[i] != buoys[i])) {
n++;
}
}
if (n > 0) {
double[] tmpPres = new double[pressures.length - n];
float[] tmpBuoy = new float[tmpPres.length];
n = 0;
for (int i = 0; i < pressures.length; i++) {
if ((pressures[i] != pressures[i]) || (buoys[i] != buoys[i])) {
continue;
}
tmpPres[n] = pressures[i];
tmpBuoy[n] = buoys[i];
n++;
}
pressures = tmpPres;
buoys = tmpBuoy;
}
if (pressures.length <= 1) {
newLfc = missingLfc;
} else {
Unit presUnit = domainSet.getSetUnits()[0];
boolean ascending = pressures[0] > pressures[1];
if (!ascending) {
/*
* The profile is descending. Make the temporary value arrays
* ascending.
*/
for (int i = 0, j = pressures.length; i < pressures.length / 2; i++) {
--j;
double pres = pressures[i];
pressures[i] = pressures[j];
pressures[j] = pres;
float buoy = buoys[i];
buoys[i] = buoys[j];
buoys[j] = buoy;
}
}
/*
* Descend from the top to positive buoyancy.
*/
int i = buoys.length;
while ((--i >= 0) && (buoys[i] <= 0)) ;
if (i < 0) {
/*
* There is no positively buoyant region.
*/
newLfc = missingLfc;
} else {
/*
* Descend to first non-positive buoyant region.
*/
while ((--i >= 0) && (buoys[i] > 0)) ;
if (i < 0) {
/*
* There is no non-positive buoyant region.
*/
newLfc = missingLfc;
} else {
/*
* Interpolate the LFC.
*/
double pressure =
pressures[i + 1]
/ Math.exp(
buoys[i + 1]
* (Math.log(pressures[i] / pressures[i + 1])
/ (buoys[i] - buoys[i + 1])));
newLfc = new Real((RealType) missingLfc.getType(), pressure, presUnit);
}
}
}
synchronized (this) {
oldLfc = lfc;
lfc = newLfc;
}
firePropertyChange(OUTPUT_PROPERTY_NAME, oldLfc, newLfc);
}