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Thread: Streaming microphone audio to HTTP Client

  1. #1

    Default Streaming microphone audio to HTTP Client

    Hello,

    I would like to stream the audio of the microphone connected with my Raspberry Pi over a Java webserver to connected webbrowsers. Unfortunately, I don't think that something like this could work:

       public HTTPServer(Socket client, TargetDataLine microphone) {
            this.client = client;
            this.microphone = microphone;
        }
     
        public void run() {
            try {
                System.out.println("The Client " + client.getInetAddress() + ":" + client.getPort() + " is connected");
                output = new DataOutputStream(client.getOutputStream());
     
                sendResponse();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
     
        public void sendResponse() throws Exception {
            int bufferSize = microphone.getBufferSize() / 5;
            bufferSize += 512;
     
            String statusLine = "HTTP/1.1 200 OK\r\n";
            String serverDetails = "Server: HTTP-Server\r\n";
            String contentTypeLine = "Content-Type: audio/mpeg\r\n";
            String contentLengthLine = "Content-Length: " + bufferSize + "\r\n";
     
            output.writeBytes(statusLine);
            output.writeBytes(serverDetails);
            output.writeBytes(contentTypeLine);
            output.writeBytes(contentLengthLine);
            output.writeBytes("\r\n");
     
            int numBytesRead;
     
            microphone.open();
            microphone.start();
     
            byte[] targetData = new byte[bufferSize];
     
            while (true) {
                numBytesRead = microphone.read(targetData, 0, targetData.length);
     
                if (numBytesRead == -1) break;
                output.write(targetData, 0, numBytesRead);
                output.flush();
            }
        }


            ServerSocket server = null;
            try {
                server = new ServerSocket(8888);
            } catch (IOException e) {
                e.printStackTrace();
            }
     
            AudioFormat format = getAudioFormat();
     
            DataLine.Info micInfo = new DataLine.Info(TargetDataLine.class, format);
            TargetDataLine mic = null;
            try {
                mic = (TargetDataLine) AudioSystem.getLine(micInfo);
            } catch (LineUnavailableException e) {
                e.printStackTrace();
            }
     
            System.out.println("TCPServer Waiting for client on port 8888");
     
            while (true) {
                Socket connected = null;
                try {
                    connected = server.accept();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                new HTTPServer(connected, mic).start();
            }

    Is there a library which allows something like this?

  2. #2
    Junior Member
    Join Date
    Feb 2018
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    Default Re: Streaming microphone audio to HTTP Client

    I'm looking for the same thing! Did you have any luck finding such a library?

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