core.be.tarsos.dsp.ZeroCrossingRateProcessor 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;
/**
* Calculates the zero crossing rate for a frame.
* @author Joren Six
*
*/
public class ZeroCrossingRateProcessor implements AudioProcessor{
private float zeroCrossingRate = 0;
@Override
public boolean process(AudioEvent audioEvent) {
float[] buffer = audioEvent.getFloatBuffer();
int numberOfZeroCrossings = 0;
for(int i = 1 ; i < buffer.length ; i++){
if(buffer[i] * buffer[i-1] < 0){
numberOfZeroCrossings++;
}
}
zeroCrossingRate = numberOfZeroCrossings / (float) (buffer.length - 1);
return true;
}
public float getZeroCrossingRate(){
return zeroCrossingRate;
}
@Override
public void processingFinished() {
}
}