【发布时间】：2015-01-18 11:22:38
【问题描述】：
正如标题所示，我正在制作一个应用程序，将音频从客户端流式传输到存储音频的服务器，然后将其分发到多个客户端进行播放。在音频存储之前，我已经完成了所有工作，但我似乎无法将音频流式传输到多个客户端。
这是我的尝试：
服务器代码：
class Server {
static int port = 50005;
static int listen = 50010;
static int listenerPort = 50015;
static DatagramSocket serverSocket, listenSocket,
broadcastSocket;
static byte[] receiveData, listenData;
static DatagramPacket receivePacket, listenPacket;
static DataOutputStream out;
static ArrayList<String> listeners = new ArrayList<String>();
static File file = new File("recording.bin");
static boolean active = true;
public static void main(String args[]) throws Exception {
//Define the Receiving Datagram Socket
serverSocket = new DatagramSocket(port);
//Define the Timeout of the socket
serverSocket.setSoTimeout(10000);
//Define the listening socket
listenSocket = new DatagramSocket(listen);
listenSocket.setSoTimeout(10000);
//Define Broadcasting socket
broadcastSocket = new DatagramSocket();
//Define data size, 1400 is best sound rate so far
receiveData = new byte[1400];
listenData = new byte[256];
//Define the DatagramPacket object
receivePacket = new DatagramPacket(receiveData, receiveData.length);
listenPacket = new DatagramPacket(listenData, listenData.length);
//Prepare the DataOutputStream to write to file.
out = new DataOutputStream(new FileOutputStream(file));
//Write and Broadcast on a separate thread
Thread t = new Thread() {
@Override public void run() {
getPackets();
}
};
t.start();
//Set up Connection Listener on a separate thread
Thread l = new Thread() {
@Override public void run() {
listen();
}
};
l.start();
}
/***
* Function that gets the audio data packets
* saves them, and outputs the audio to the speakers.
*/
public static void getPackets() {
while (active) {
try {
//Wait until packet is received
serverSocket.receive(receivePacket);
System.out.println("Receiving Data");
//Write to Binary file
out.write(receiveData, 0, receiveData.length);
//Send data
sendData(receivePacket.getData());
} catch (IOException e) {
active = false;
//If connection times out close it
try {
out.close();
} catch (IOException t) {
//Do nothing
}
System.out.println("Converting to audio");
//Convert audio file
new Convert().toWAV();
}
}
}
/***
* Function that listens if there are any connections made to
* the listener port and creates a datagram socket to stream audio
* to anyone who connects
*/
public static void listen() {
while (active) {
try {
//Wait until packet is received
listenSocket.receive(listenPacket);
listeners.add(listenPacket.getAddress().getHostAddress());
System.out.println("Client received");
} catch (IOException e) {
if(active) {
listen();
}
}
}
}
public static void sendData(byte[] data) {
try {
for (int i = 0; i < listeners.size(); i++) {
InetAddress destination = InetAddress.getByName(listeners.get(i));
broadcastSocket.send(new DatagramPacket(data, data.length, destination, listenerPort));
System.out.println("Sending Data");
}
} catch (Exception e) {
//If it failed to send don't do anything
e.printStackTrace();
}
}
}
这是我在多个客户端上运行的代码：
class Receiver {
static AudioInputStream ais;
static AudioFormat format;
static boolean active = true;
static int port = 50015;
static DatagramSocket serverSocket, socket;
static byte[] receiveData;
static DatagramPacket receivePacket, packet;
static ByteArrayInputStream bais;
static int sampleRate = 8000;
static int time = 10;
static DataLine.Info dataLineInfo;
static SourceDataLine sourceDataLine;
public static void main(String args[]) throws Exception {
socket = new DatagramSocket();
InetAddress destination = InetAddress.getByName("server ip address");
byte[] temp = new byte[256];
//putting buffer in the packet
packet = new DatagramPacket(temp, temp.length, destination, 50010);
socket.send(packet);
//Define the Receiving Datagram Socket
serverSocket = new DatagramSocket(port);
//Define data size, 1400 is best sound rate so far
receiveData = new byte[1400];
//Define the format sampleRate, Sample Size in Bits, Channels (Mono), Signed, Big Endian
format = new AudioFormat(sampleRate, 16, 1, true, false);
//Define the DatagramPacket object
receivePacket = new DatagramPacket(receiveData, receiveData.length);
//Prepare the Byte Array Input Stream
bais = new ByteArrayInputStream(receivePacket.getData());
//Now concert the Byte Array into an Audio Input Stream
ais = new AudioInputStream(bais, format, receivePacket.getLength());
//Define DataLineInfo
dataLineInfo = new DataLine.Info(SourceDataLine.class, format);
//Get the current Audio Line from the system
sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo);
//Open up sourceDataLine and Start it
sourceDataLine.open(format);
sourceDataLine.start();
//Write and play on a separate thread
Thread t = new Thread() {
@Override
public void run() {
getPackets();
}
};
t.start();
//Now keep track of time
while (time > 0) {
time--;
Thread.sleep(1000);
if (time == 0) {
active = false;
}
}
//Close SourceDataLine
sourceDataLine.drain();
sourceDataLine.close();
}
/***
* Function that gets the audio data packets
* saves them, and outputs the audio to the speakers.
*/
public static void getPackets() {
try {
while (active) {
System.out.println("Receiving");
//Wait until packet is received
serverSocket.receive(receivePacket);
//Reset time
time = 10;
//Send data to speakers
toSpeaker(receivePacket.getData());
}
} catch (IOException e) {
}
}
/***
* Function that plays the sound bytes with the speakers.
* @param soundbytes = bytes of sound sent to speakers
*/
public static void toSpeaker(byte soundbytes[]) {
try {
sourceDataLine.write(soundbytes, 0, soundbytes.length);
} catch (Exception e) {
System.out.println("Not working in speakers...");
e.printStackTrace();
}
}
}
我已验证服务器确实收到了我用来获取客户端 IP 地址的初始连接，但客户端似乎没有收到任何数据，并且我在运行时没有收到任何错误。
任何帮助将不胜感激。
【问题讨论】：
标签： java android audio streaming