Question

我理解流buffer对IO一般很有用。

我想问一下buffer应该如何在实时的voIP应用程序中使用，例如stream in（Android）MediaRecorder输出 - ＆gt; LocalSocket - ＆gt; UDP / RTP

对我而言，看起来缓冲任何流都没有空间。

我说错了吗？还是我错过了重要的事情？

在这种情况下不使用缓冲区时设备资源效率（CPU和Buttery）如何？

伪代码

//UNIX type localSocket Server to receive stream from mediaRecorder
server = new LocalServerSocket(SOCKET_ADDRESS);

// local socket between mediaRecorder and localSocket Server
 sender = new LocalSocket();
 sender.connect(new LocalSocketAddress(SOCKET_ADDRESS));
//mediaRecorder
 mRecorder = new MediaRecorder(); 
 //.....................
 //sender.getFileDescriptor() is set as the vitual Outputfile
 mRecorder.setOutputFile(sender.getFileDescriptor());
 mRecorder.prepare();
 mRecorder.start();

//localSocket Server accept the stream to receiver
receiver = server.accept();

int val;
byte[] buf;
DatagramPacket packet;
ds = new DatagramSocket(localPort);

while (localServerLoop)
{ 
    //receiver stream is read to (int)val
    val = receiver.getInputStream().read();  
    //======localServer to remoteUDP======================     
    // (int)val to (byte)buf
    buf = toBytes(val);
    //  byte  to packet
    packet = new DatagramPacket(buf, buf.length,
            InetAddress.getByName(remoteHost), remotePort);
    //send to remoteHost
    ds.send(packet);
    //=========================
}

Answer 1

您正在从流中读取单个字节，因此没有什么可以缓冲。使用带有字节数组的read()方法之一，这将是您的缓冲区。您还可以使用BufferedInputStream等进行换行。您可能希望了解Java中的流如何工作，这不是Android特定的。

请参阅http://developer.android.com/reference/java/io/InputStream.html#read(byte[])

流缓冲器用于语音聊天/ voIP？

1 个答案: