/*
*
      
_______
                       
_____
   
_____ _____
  

*
     
|__
   
__|
                     
|
  
__ \ / ____|__ \
 

*
        
| | __ _ _ __ ___
  
______| || | (___ | |__) |
*
        
| |/ _` | '__/ __|/ _ \/ __| |
  
| |\___ \|___/
 

*
        
| | (_| | |
  
\__ \ (_) \__ \ |__| |____) | |
     

*
        
|_|\__,_|_|
  
|___/\___/|___/_____/|_____/|_|
     

*
                                                         

* -------------------------------------------------------------
*
* 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
	
}
}