playback.java

java局域网通信软件,好似飞鸽一样

//下面是音频输出的代码：

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


/** 
* Title:        VoiceChat 
* Description:  输出音频（放音程序） 
* Copyright:    Copyright (c) 2001 
* Company: 
* @author        
* @version 1.0 
*/ 


class Playback implements Runnable { 

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

       Playback(Socket s){//构造器 取得socket以获得网络输入流 
         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));//封装成音频输出流，如果网络流是经过压缩的需在此加套解压流 
           } 
           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];//此处数组的大小跟实时性关系不大，可根据情况进行调整 
           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; 
       } 
}