android - 通过udp从android广播音频/视频到wifi并用vlc收听

Question

我正在尝试通过 udp 将音频文件从我的 android 设备广播到本地 wifi，并让本地网络上的客户端通过 VLC 的网络流媒体选项收听它。如果我使用自己的接收代码，我可以在连接到网络的任何设备上广播和接收它，但我希望 VLC 能够播放它。在发送数据报包之前是否需要完成任何特定的编码或格式设置？

我的发送码

public void SendAudio()
{
    Thread thrd = new Thread(new Runnable() {
        @Override
        public void run() 
        {
            Log.e(LOG_TAG, "start send thread, thread id: "
                + Thread.currentThread().getId());
            long file_size = 0;
            int bytes_read = 0;
            int bytes_count = 0;
            File audio = new File(AUDIO_FILE_PATH);
            FileInputStream audio_stream = null;
            file_size = audio.length();
            byte[] buf = new byte[BUF_SIZE];
            try
            {
                InetAddress addr = InetAddress.getByName("192.168.1.255");
                DatagramSocket sock = new DatagramSocket();


                while(true){
                    bytes_count=0;
                    audio_stream = new FileInputStream(audio);
                while(bytes_count < file_size)
                {
                    bytes_read = audio_stream.read(buf, 0, BUF_SIZE);
                    DatagramPacket pack = new DatagramPacket(buf, bytes_read,
                            addr, AUDIO_PORT);
                    sock.send(pack);
                    bytes_count += bytes_read;
                    Log.d(LOG_TAG, "bytes_count : " + bytes_count);
                    Thread.sleep(SAMPLE_INTERVAL, 0);
                }
                }
            }
            catch (InterruptedException ie)
            {
                Log.e(LOG_TAG, "InterruptedException");
            }
            catch (FileNotFoundException fnfe)
            {
                Log.e(LOG_TAG, "FileNotFoundException");
            }
            catch (SocketException se)
            {
                Log.e(LOG_TAG, "SocketException");
            }
            catch (UnknownHostException uhe)
            {
                Log.e(LOG_TAG, "UnknownHostException");
            }
            catch (IOException ie)
            {
                Log.e(LOG_TAG, "IOException");
            }
        } // end run
    });
    thrd.start();
}

我的接收码`

public void RecvAudio()
{
    Thread thrd = new Thread(new Runnable() {
        @Override
        public void run() 
        {
            Log.e(LOG_TAG, "start recv thread, thread id: "
                + Thread.currentThread().getId());
            AudioTrack track = new AudioTrack(AudioManager.STREAM_MUSIC, 
                    SAMPLE_RATE, AudioFormat.CHANNEL_CONFIGURATION_MONO, 
                    AudioFormat.ENCODING_PCM_16BIT, BUF_SIZE, 
                    AudioTrack.MODE_STREAM);
            track.play();
            try
            {
                DatagramSocket sock = new DatagramSocket(AUDIO_PORT);
                byte[] buf = new byte[BUF_SIZE];

                while(true)
                {

                    DatagramPacket pack = new DatagramPacket(buf, BUF_SIZE);
                    sock.receive(pack);
                    Log.d(LOG_TAG, "recv pack: " + pack.getLength());
                    track.write(pack.getData(), 0, pack.getLength());
                }
            }
            catch (SocketException se)
            {
                Log.e(LOG_TAG, "SocketException: " + se.toString());
            }
            catch (IOException ie)
            {
                Log.e(LOG_TAG, "IOException" + ie.toString());
            }
        } // end run
    });
    thrd.start();

}

再一次，使用这个我可以从一个安卓设备发送这个并使用我给定的接收代码从另一个很好地收听，但我想使用 vlc 的获取网络流命令播放它并收听 h77p://@:端口并播放音频。再次感谢 :)

Answer 1

您可以使用此 tutorial 中的代码:

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
  StrictMode.setThreadPolicy(policy);
  try {   
      AudioManager audio =  (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
      audio.setMode(AudioManager.MODE_IN_COMMUNICATION);
      AudioGroup audioGroup = new AudioGroup();
      audioGroup.setMode(AudioGroup.MODE_NORMAL);        
      AudioStream audioStream = new AudioStream(InetAddress.getByAddress(getLocalIPAddress ()));
      audioStream.setCodec(AudioCodec.PCMU);
      audioStream.setMode(RtpStream.MODE_NORMAL);
                           //set receiver(vlc player) machine ip address(please update with your machine ip)
      audioStream.associate(InetAddress.getByAddress(new byte[] {(byte)192, (byte)168, (byte)1, (byte)19 }), 22222);
      audioStream.join(audioGroup);


  } catch (Exception e) {
   Log.e("----------------------", e.toString());
   e.printStackTrace();
  }
 }
public static byte[] getLocalIPAddress () {
    byte ip[]=null;
       try {
           for (Enumeration en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
               NetworkInterface intf = en.nextElement();
               for (Enumeration enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                   InetAddress inetAddress = enumIpAddr.nextElement();
                   if (!inetAddress.isLoopbackAddress()) {
                    ip= inetAddress.getAddress();
                   }
               }
           }
       } catch (SocketException ex) {
           Log.i("SocketException ", ex.toString());
       }
       return ip;

 }