java - 我的游戏中出现 .wav、.au 声音后出现极度延迟？

Question

我尝试在网上搜索资源非常有限。在操作执行方法中:

actionPerformed(){
---------------
new Sound();}

在声音类中

 public Sound(){
   try {
    String filePath="path\\file.wav";
    File path= new File(filePath);
    AudioInputStream stream;
    AudioFormat format;
    DataLine.Info info;
    Clip clip;

    stream = AudioSystem.getAudioInputStream(path);
    format = stream.getFormat();//becomes formatted
    info = new DataLine.Info(Clip.class, format);// info
    clip = (Clip) AudioSystem.getLine(info);// casting for clip
    clip.open(stream); // clip opens stream with path
    clip.start();
}
    catch (Exception e) {
        System.out.println("errors");
    }

}

谢谢。

Answer 1

根据 .start() 的 Javadoc方法:

Allows a line to engage in data I/O. If invoked on a line that is already running, this method does nothing. Unless the data in the buffer has been flushed, the line resumes I/O starting with the first frame that was unprocessed at the time the line was stopped. When audio capture or playback starts, a START event is generated.

没有提及以异步方式播放音频。这意味着您的声音将由调用 start 方法的线程处理，由于您在事件处理程序中调用它，因此最终意味着您的事件调度线程正在处理音频播放。

该线程还负责在屏幕上绘制内容，因此在其上运行的任何其他内容(在您的情况下为音频)都会对渲染产生负面影响。

您可以使用如下代码(取自 here )使您的音频在单独的线程上播放。这应该可以解决您的滞后问题。

import java.io.File; 
import java.io.IOException; 
import javax.sound.sampled.AudioFormat; 
import javax.sound.sampled.AudioInputStream; 
import javax.sound.sampled.AudioSystem; 
import javax.sound.sampled.DataLine; 
import javax.sound.sampled.FloatControl; 
import javax.sound.sampled.LineUnavailableException; 
import javax.sound.sampled.SourceDataLine; 
import javax.sound.sampled.UnsupportedAudioFileException; 

public class AePlayWave extends Thread { 

    private String filename;

    private Position curPosition;

    private final int EXTERNAL_BUFFER_SIZE = 524288; // 128Kb 

    enum Position { 
        LEFT, RIGHT, NORMAL
    };

    public AePlayWave(String wavfile) { 
        filename = wavfile;
        curPosition = Position.NORMAL;
    } 

    public AePlayWave(String wavfile, Position p) { 
        filename = wavfile;
        curPosition = p;
    } 

    public void run() { 

        File soundFile = new File(filename);
        if (!soundFile.exists()) { 
            System.err.println("Wave file not found: " + filename);
            return;
        } 

        AudioInputStream audioInputStream = null;
        try { 
            audioInputStream = AudioSystem.getAudioInputStream(soundFile);
        } catch (UnsupportedAudioFileException e1) { 
            e1.printStackTrace();
            return;
        } catch (IOException e1) { 
            e1.printStackTrace();
            return;
        } 

        AudioFormat format = audioInputStream.getFormat();
        SourceDataLine auline = null;
        DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);

        try { 
            auline = (SourceDataLine) AudioSystem.getLine(info);
            auline.open(format);
        } catch (LineUnavailableException e) { 
            e.printStackTrace();
            return;
        } catch (Exception e) { 
            e.printStackTrace();
            return;
        } 

        if (auline.isControlSupported(FloatControl.Type.PAN)) { 
            FloatControl pan = (FloatControl) auline
                    .getControl(FloatControl.Type.PAN);
            if (curPosition == Position.RIGHT) 
                pan.setValue(1.0f);
            else if (curPosition == Position.LEFT) 
                pan.setValue(-1.0f);
        } 

        auline.start();
        int nBytesRead = 0;
        byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];

        try { 
            while (nBytesRead != -1) { 
                nBytesRead = audioInputStream.read(abData, 0, abData.length);
                if (nBytesRead >= 0) 
                    auline.write(abData, 0, nBytesRead);
            } 
        } catch (IOException e) { 
            e.printStackTrace();
            return;
        } finally { 
            auline.drain();
            auline.close();
        } 

    } 
}