be.tarsos.dsp.MultichannelToMono Maven / Gradle / Ivy
/*
* _______ _____ _____ _____
* |__ __| | __ \ / ____| __ \
* | | __ _ _ __ ___ ___ ___| | | | (___ | |__) |
* | |/ _` | '__/ __|/ _ \/ __| | | |\___ \| ___/
* | | (_| | | \__ \ (_) \__ \ |__| |____) | |
* |_|\__,_|_| |___/\___/|___/_____/|_____/|_|
*
* -------------------------------------------------------------
*
* 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;
public class MultichannelToMono implements AudioProcessor{
private int channels;
private boolean mean;
public MultichannelToMono(int numberOfChannels,boolean meanOfchannels){
channels = numberOfChannels;
mean = meanOfchannels;
}
@Override
public boolean process(AudioEvent audioEvent) {
float[] buffer = audioEvent.getFloatBuffer();
float[] newBuffer = new float[buffer.length/channels];
if(mean){
if(channels==2){
for(int i = 0 ; i < buffer.length ; i = i + channels){
newBuffer[i/channels]=(buffer[i]+buffer[i+1])/2.0f;
}
}else{
for(int i = 0 ; i < buffer.length ; i = i + channels){
double sum = 0;
for(int j = 0; j < channels;j++){
sum = sum + buffer[i+j];
}
newBuffer[i/channels]=(float) (sum/channels);
}
}
}else{
for(int i = 0 ; i < buffer.length ; i = i + channels){
newBuffer[i/channels]=buffer[i];
}
}
audioEvent.setFloatBuffer(newBuffer);
return true;
}
@Override
public void processingFinished() {
}
}
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