public SonarSoundEngine(int maxChannels) throws LineUnavailableException {
silentSample = new SonarSample(new float[] {0}, 44100);
Mixer mixer = AudioSystem.getMixer(null);
sdl = (SourceDataLine) mixer.getLine(new Line.Info(SourceDataLine.class));
sdl.open(new AudioFormat(rate, 16, 2, true, false), bufferSize * 2 * 2 * 2 * 2 * 2);
soundBuffer.order(ByteOrder.LITTLE_ENDIAN);
sdl.start();
try {
/* FloatControl volumeControl = (FloatControl) sdl.getControl(FloatControl.Type.MASTER_GAIN);
volumeControl.setValue(volumeControl.getMaximum());*/
} catch (IllegalArgumentException e) {
System.out.println("Failed to set the sound volume");
}
listenerMixer = new ListenerMixer(maxChannels);
leftBuf = new float[bufferSize];
rightBuf = new float[bufferSize];
Thread thread = new Thread(this);
thread.setDaemon(true);
thread.setPriority(10);
thread.start();
}
public void tick() {
soundBuffer.clear();
// targetAmplitude = (targetAmplitude - 1) * 0.9f + 1;
// targetAmplitude = (targetAmplitude - 1) * 0.9f + 1;
synchronized (listenerMixer) {
@SuppressWarnings("unused")
float maxAmplitude = listenerMixer.read(leftBuf, rightBuf, rate);
// if (maxAmplitude > targetAmplitude) targetAmplitude = maxAmplitude;
}
soundBuffer.clear();
float gain = 32000;
for (int i = 0; i < bufferSize; i++) {
// amplitude += (targetAmplitude - amplitude) / rate;
// amplitude = 1;
// float gain = 30000;
int l = (int) (leftBuf[i] * gain);
int r = (int) (rightBuf[i] * gain);
if (l > 32767) l = 32767;
if (r > 32767) r = 32767;
if (l < -32767) l = -32767;
if (r < -32767) r = -32767;
soundBuffer.putShort((short) l);
soundBuffer.putShort((short) r);
}
sdl.write(soundBuffer.array(), 0, bufferSize * 2 * 2);
}