Question

我成功通过TCP套接字发送和读取文本和图像数据。但我无法发送和读取音频流数据。

服务器上的示例代码：

public class ServerAudio {
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        try {
            ServerSocket serverSocker = new ServerSocket();
            Socket client = null;
            serverSocker.bind(new InetSocketAddress(6666));
            if (serverSocker.isBound()) {
                client = serverSocker.accept();
                OutputStream out = client.getOutputStream();
                while (true) {
                    AudioInputStream ain = testPlay("C:/Users/Public/Music/Sample Music/adios.wav");
                    if (ain != null) {
                        AudioSystem.write(ain, AudioFileFormat.Type.WAVE, out);
                    }
                }
            }
            serverSocker.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    public static AudioInputStream testPlay(String filename) {
        AudioInputStream din = null;
        try {
            File file = new File(filename);
            AudioInputStream in = AudioSystem.getAudioInputStream(file);
            System.out.println("Before :: " + in.available());

            AudioFormat baseFormat = in.getFormat();
            AudioFormat decodedFormat =
                    new AudioFormat(AudioFormat.Encoding.PCM_UNSIGNED, baseFormat.getSampleRate(),
                            8, baseFormat.getChannels(), baseFormat.getChannels(),
                            baseFormat.getSampleRate(), false);
            din = AudioSystem.getAudioInputStream(decodedFormat, in);
            System.out.println("After :: " + din.available());
            return din;
        } catch (Exception e) {
            // Handle exception.
            e.printStackTrace();
        }
        return din;
    }
}

客户端的示例代码：

public class RDPPlayAudioBytes {
    private static Socket socket;
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        // SocketAddress socketAddress = new InetSocketAddress("172.19.1.50", 4444);
        try {
            Socket socket = new Socket("172.19.0.109", 6666);
            // socket.connect(socketAddress, 10000);
            if (socket != null && socket.isConnected()) {
                InputStream inputStream = socket.getInputStream();
                // DataInputStream din=new DataInputStream(inputStream);
                while (inputStream != null) {
                    if (inputStream.available() > 0) {
                        System.out.println(inputStream.available());
                        InputStream bufferedIn = new BufferedInputStream(inputStream);
                        System.out.println("********** Buffred *********" + bufferedIn.available());
                        AudioInputStream ais = AudioSystem.getAudioInputStream(bufferedIn);
                    }
                }
            }


        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } /*
           * catch (LineUnavailableException e) { // TODO Auto-generated catch block
           * e.printStackTrace(); }
           */catch (UnsupportedAudioFileException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

我在哪里获得异常

javax.sound.sampled.UnsupportedAudioFileException: could not get audio input stream from input stream
    at javax.sound.sampled.AudioSystem.getAudioInputStream(Unknown Source)

我观察到服务器正在向客户端发送35394字节数据，但在客户端，我们正在接收8192字节数据。我无法理解为什么客户端缺少字节。

请帮我讲解如何通过TCP套接字发送音频流。

Answer 1

服务器：服务器只传输声音文件的字节。没有涉及AudioSytem。将声音文件作为参数传递：

java AudioServer "C:/Users/Public/Music/Sample Music/adios.wav"

AudioServer类的代码：

import java.io.*;
import java.net.*;

public class AudioServer {
    public static void main(String[] args) throws IOException {
        if (args.length == 0)
            throw new IllegalArgumentException("expected sound file arg");
        File soundFile = AudioUtil.getSoundFile(args[0]);

        System.out.println("server: " + soundFile);

        try (ServerSocket serverSocker = new ServerSocket(6666); 
            FileInputStream in = new FileInputStream(soundFile)) {
            if (serverSocker.isBound()) {
                Socket client = serverSocker.accept();
                OutputStream out = client.getOutputStream();

                byte buffer[] = new byte[2048];
                int count;
                while ((count = in.read(buffer)) != -1)
                    out.write(buffer, 0, count);
            }
        }

        System.out.println("server: shutdown");
    }
}

客户端：客户端可以播放通过命令行传递的声音文件，以便测试是否有效：

java AudioClient "C:/Users/Public/Music/Sample Music/adios.wav"

无参数调用它连接到服务器并播放通过套接字接收的文件：

java AudioClient

代码：

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


public class AudioClient {
    public static void main(String[] args) throws Exception {
        if (args.length > 0) {
            // play a file passed via the command line
            File soundFile = AudioUtil.getSoundFile(args[0]);
            System.out.println("Client: " + soundFile);
            try (BufferedInputStream in = new BufferedInputStream(new FileInputStream(soundFile))) {
                play(in);
            }
        }
        else {
            // play soundfile from server
            System.out.println("Client: reading from 127.0.0.1:6666");
            try (Socket socket = new Socket("127.0.0.1", 6666)) {
                if (socket.isConnected()) {
                    InputStream in = new BufferedInputStream(socket.getInputStream());
                    play(in);
                }
            }
        }

        System.out.println("Client: end");
    }


    private static synchronized void play(final InputStream in) throws Exception {
        AudioInputStream ais = AudioSystem.getAudioInputStream(in);
        try (Clip clip = AudioSystem.getClip()) {
            clip.open(ais);
            clip.start();
            Thread.sleep(100); // given clip.drain a chance to start
            clip.drain();
        }
    }
}

AudioServer和AudioClient使用的实用程序类：

import java.io.File;

public class AudioUtil {
    public static File getSoundFile(String fileName) {
        File soundFile = new File(fileName);
        if (!soundFile.exists() || !soundFile.isFile())
            throw new IllegalArgumentException("not a file: " + soundFile);
        return soundFile;
    }
}

Answer 2

当TCP可靠时，将完全接收字节。还有一个小问题。您需要播放音频流中接收的音频，只创建音频输入流不会播放。可以存在用于播放所接收的音频的不同可能技术。您可以使用 Java Sound API 中的剪辑或 SourceDataLine 。另外，不要多次创建AudioInputStream。只需创建一次并使用它。

这是您可用于播放接收音频的可能解决方案之一。

public class RDPPlayAudioBytes {

private static Socket socket;
private static BufferedInputStream inputStream;

/**
 * @param args
 * @throws javax.sound.sampled.LineUnavailableException
 */
public static void main(String[] args) throws LineUnavailableException {
    // TODO Auto-generated method stub
    // SocketAddress socketAddress = new InetSocketAddress("172.19.1.50", 4444);
    try {
        socket = new Socket("127.0.0.1", 6666);

        if (socket.isConnected()) {

            inputStream = new BufferedInputStream(socket.getInputStream());

            Clip clip = AudioSystem.getClip();
            AudioInputStream ais = AudioSystem.getAudioInputStream(inputStream);
            clip.open(ais);
            clip.start();

            while (inputStream != null) {
                if (clip.isActive()) {

                    System.out.println("********** Buffred *********" + inputStream.available());

                }
            }

        }

    } catch (IOException | UnsupportedAudioFileException e) {
        System.err.println(e);
    }
}
}

根据您的要求，您可能需要不同的实施方案。这只是演示如何使用 AudioInputStream 使用 Clip 播放音频。您可能会注意到我发布的代码中有很多更改。我希望你能理解这一点。

您可以参考Java Sound API文档，深入了解playing audio。

的基础知识

注意：

为了您的知识，您可能需要实现一个监听器，以便在音频剪辑播放完毕之前不关闭该程序。在当前的实现中，由于使用了循环，它不会发生。但是最好使用一个监听器。您可以参考this post。
您还可以将音频数据读入byte []，然后在收到后立即播放。实施将略有改变。

通过TCP发送音频流，UnsupportedAudioFileException

2 个答案: