抱歉我的英文不好
我编写了一个播放乐器音频文件样本的Java桌面应用程序。
每次应用程序收到笔记时，它必须停止当前播放的笔记并播放新笔记。如果用户停止播放，则应用必须对活动音符进行淡出。
顺便说一句，延迟越小越好。
我创建了一个runnable，它拥有一个播放和停止方法，允许我播放或停止音符（淡出）
我的代码有效，但音质不好（多次点击和裁剪等）..
- 如何改进我的代码？我犯了错误吗？
- 除了JavaFx媒体播放器以外，还有其他Java技术最适合我的需求吗？
public class SamplePlayer implements Runnable{
private boolean fadeOut=false; // true when a fade out is needed
private int soundToFadeOut=0; //the sound number to fade out
private int sound=0; // the sound number to play (nothing if zero)
private int lastSound=0; //the last sound number played that wee need to stop befor playing a new one
MediaPlayer[] sample = new MediaPlayer[42]; //array to store all pre-loaded sounds
public SamplePlayer()
{
for(int i=0;i<42;i++) // load all sounds
{
Media pick = new Media(new File("./src/files/samples/1_"+(i+55)+".wav" ).toURI().toString());
sample[i] = new MediaPlayer(pick);
}
}
/**
* Here i try to play a sound each time the sound variable has changed
* and fade out the sound specified in soundToFadeOut variable if fadeOut variable come to true;
*/
@Override
public void run() {
while(true) // bad, but it's just for testing
{
try {
if(sound!=0) // if a sound need to be played
{
if(lastSound!=0) // if i's not the first sound to played i stop the previous one.
{
sample[lastSound].stop();
}
sample[sound].setVolume(1); //returns the volume to 1 in case we made a fade out
lastSound=sound;
sound=0;//sound = 0 to monitor new other sound
}
if(fadeOut==true) // if wee need to make a fade out
{
fadeOut=false;
fadeOut(sample[soundToFadeOut],50);
}
Thread.sleep(1); // if not the thread keep busy and play, stop method not working properly
} catch (InterruptedException ex) {
Logger.getLogger(SamplePlayer.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
private void fadeOut(MediaPlayer player,double itteration) // fade out method : run a new thread to itterate on volume
{Runnable task = () -> {
try{
for(int i=0;i<itteration;i++)
{
double value=(itteration-i)/itteration; // set value to 1.0 to near 0.0 each itteration
if(value<0.1)
{
value=0;
}
player.setVolume(value);
Thread.sleep(5);
}
}catch(Exception e){e.printStackTrace();}
};
new Thread(task).start();
}
/*
*
* play and stop method which are called when a sound need to be played or stoped (fade out)
*
*/
public void play(int note)
{
sound=note-55; // -55 just to match with our array range
}
public void stop(int note)
{
soundToFadeOut=note-55;
fadeOut=true;
}
}