import java.io.*; 
import javax.sound.sampled.*; 
import java.net.*; 


/** 
* Title:        VoiceChat 
* Description:  輸出音頻（放音程序） 
* Copyright:    Copyright (c) 2001 
* Company: 
* @author       你猜！ 
* @version 1.0 
*/ 

class Playback implements Runnable { 

       final int bufSize = 16384; 
       SourceDataLine line; 
       Thread thread; 
       Socket s; 

       Playback(Socket s){//構(gòu)造器 取得socket以獲得網(wǎng)絡(luò)輸入流 
         this.s=s; 
       } 
       public void start() { 

           thread = new Thread(this); 
           thread.setName("Playback"); 
           thread.start(); 
       } 

       public void stop() { 
           thread = null; 
       } 

       public void run() { 

           AudioFormat format =new AudioFormat(8000,16,2,true,true);//AudioFormat(float sampleRate, int sampleSizeInBits, int channels, boolean signed, boolean bigEndian） 
           BufferedInputStream playbackInputStream; 

           try { 
             playbackInputStream=new BufferedInputStream(new AudioInputStream(s.getInputStream(),format,2147483647));//封裝成音頻輸出流，如果網(wǎng)絡(luò)流是經(jīng)過壓縮的需在此加套解壓流 
           } 
           catch (IOException ex) { 
               return; 
           } 

           DataLine.Info info = new DataLine.Info(SourceDataLine.class,format); 

           try { 
               line = (SourceDataLine) AudioSystem.getLine(info); 
               line.open(format, bufSize); 
           } catch (LineUnavailableException ex) { 
               return; 
           } 

           byte[] data = new byte[1024];//此處數(shù)組的大小跟實(shí)時(shí)性關(guān)系不大，可根據(jù)情況進(jìn)行調(diào)整 
           int numBytesRead = 0; 
           line.start(); 

           while (thread != null) { 
              try{ 
                 numBytesRead = playbackInputStream.read(data); 
                 line.write(data, 0,numBytesRead); 
              } catch (IOException e) { 
                   break; 
               } 
           } 

           if (thread != null) { 
               line.drain(); 
           } 

           line.stop(); 
           line.close(); 
           line = null; 
       } 
}