java son de fondu

Question

En utilisant javax.sound.sampled, je veux faire disparaître un son que j'ai commencé à boucler infiniment. Voici comment j'ai commencé le son:

Clip clip = AudioSystem.getClip(); 
AudioInputStream inputStream = AudioSystem 
.getAudioInputStream(new File("x.wav")); 
clip.open(inputStream); 
clip.loop(clip.LOOP_CONTINUOUSLY); 

Quelqu'un pourrait-il me montrer comment je peux faire cela? Dois-je utiliser un système de son différent, tel que FMOD (si cela est possible en Java)? Merci.

Answer 1

Jetez un oeil ici: Openjava sound demo
Ils utilisent FloatControl gainControl; // for volume

/** 
* Set the volume to a value between 0 and 1. 
*/ 
public void setVolume(double value) { 
    // value is between 0 and 1 
    value = (value<=0.0)? 0.0001 : ((value>1.0)? 1.0 : value); 
    try { 
     float dB = (float)(Math.log(value)/Math.log(10.0)*20.0); 
     gainControl.setValue(dB); 
    } catch (Exception ex) { 
     ex.printStackTrace(); 
    } 
} 


/** 
* Fade the volume to a new value. To shift volume while sound is playing, 
* ie. to simulate motion to or from an object, the volume has to change 
* smoothly in a short period of time. Unfortunately this makes an annoying 
* clicking noise, mostly noticeable in the browser. I reduce the click 
* by fading the volume in small increments with delays in between. This 
* means that you can't change the volume very quickly. The fade has to 
* to take a second or two to prevent clicks. 
*/ 
float currDB = 0F; 
float targetDB = 0F; 
float fadePerStep = .1F; // .1 works for applets, 1 is okay for apps 
boolean fading = false; 

public void shiftVolumeTo(double value) { 
    // value is between 0 and 1 
    value = (value<=0.0)? 0.0001 : ((value>1.0)? 1.0 : value); 
    targetDB = (float)(Math.log(value)/Math.log(10.0)*20.0); 
    if (!fading) { 
     Thread t = new Thread(this); // start a thread to fade volume 
     t.start(); // calls run() below 
    } 
} 

/** 
* Run by thread, this will step the volume up or down to a target level. 
* Applets need fadePerStep=.1 to minimize clicks. 
* Apps can get away with fadePerStep=1.0 for a faster fade with no clicks. 
*/ 
public void run() 
{ 
    fading = true; // prevent running twice on same sound 
    if (currDB > targetDB) { 
     while (currDB > targetDB) { 
      currDB -= fadePerStep; 
      gainControl.setValue(currDB); 
      try {Thread.sleep(10);} catch (Exception e) {} 
     } 
    } 
    else if (currDB < targetDB) { 
     while (currDB < targetDB) { 
      currDB += fadePerStep; 
      gainControl.setValue(currDB); 
      try {Thread.sleep(10);} catch (Exception e) {} 
     } 
    } 
    fading = false; 
    currDB = targetDB; // now sound is at this volume level 
}