java 下面是音頻輸出的代碼:
//Playback.java
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
* @version 1.0
*/
class Playback implements Runnable {
final int bufSize = 16384;
SourceDataLine line;
Thread thread;
Socket s;
Playback(Socket s){//構造器 取得socket以獲得網絡輸入流
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,如果網絡流是經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];//此處數組的大小跟實時性關係不大,可根據情況進行調整
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;
}
}