core.be.tarsos.dsp.GainProcessor Maven / Gradle / Ivy
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/*
* _______ _____ _____ _____
* |__ __| | __ \ / ____| __ \
* | | __ _ _ __ ___ ___ ___| | | | (___ | |__) |
* | |/ _` | '__/ __|/ _ \/ __| | | |\___ \| ___/
* | | (_| | | \__ \ (_) \__ \ |__| |____) | |
* |_|\__,_|_| |___/\___/|___/_____/|_____/|_|
*
* -------------------------------------------------------------
*
* TarsosDSP is developed by Joren Six at IPEM, University Ghent
*
* -------------------------------------------------------------
*
* Info: http://0110.be/tag/TarsosDSP
* Github: https://github.com/JorenSix/TarsosDSP
* Releases: http://0110.be/releases/TarsosDSP/
*
* TarsosDSP includes modified source code by various authors,
* for credits and info, see README.
*
*/
package be.tarsos.dsp;
/**
* With the gain processor it is possible to adapt the volume of the sound. With
* a gain of 1, nothing happens. A gain greater than one is a volume increase a
* gain between zero and one, exclusive, is a decrease. If you need to flip the
* sign of the audio samples, you can by providing a gain of -1.0. but I have no
* idea what you could gain by doing that (pathetic pun, I know).
*
* @author Joren Six
*/
public class GainProcessor implements AudioProcessor {
private double gain;
public GainProcessor(double newGain) {
setGain(newGain);
}
public void setGain(double newGain) {
this.gain = newGain;
}
@Override
public boolean process(AudioEvent audioEvent) {
float[] audioFloatBuffer = audioEvent.getFloatBuffer();
for (int i = audioEvent.getOverlap(); i < audioFloatBuffer.length ; i++) {
float newValue = (float) (audioFloatBuffer[i] * gain);
if(newValue > 1.0f) {
newValue = 1.0f;
} else if(newValue < -1.0f) {
newValue = -1.0f;
}
audioFloatBuffer[i] = newValue;
}
return true;
}
@Override
public void processingFinished() {
// NOOP
}
}