Example #1
0
 public FilePlayback(String hostname, int port, String dataDir, double speedup, int blockSize) {
   this.hostname = hostname;
   this.port = port;
   this.dataDir = dataDir;
   this.speedup = speedup;
   this.blockSize = blockSize;
   client = new BufferClient();
   // Open the header/events/samples files
   try {
     initFiles(dataDir);
   } catch (FileNotFoundException e) {
     e.printStackTrace();
     System.exit(-1);
   }
 }
Example #2
0
  public static void main(String[] args) throws IOException, InterruptedException {
    String hostname = "localhost";
    int port = 1972;
    int timeout = 5000;
    double speedup = 1;
    int blockSize = 1;
    String dataDir = null;

    if (args.length == 0) {
      System.out.print(usage);
      System.exit(-1);
    }
    if (args.length >= 1) {
      hostname = args[0];
      int sep = hostname.indexOf(':');
      if (sep > 0) {
        port = Integer.parseInt(hostname.substring(sep + 1, hostname.length()));
        hostname = hostname.substring(0, sep);
      }
    }
    if (args.length >= 2) {
      dataDir = args[1];
    }

    if (args.length >= 3) {
      try {
        speedup = Integer.parseInt(args[2]);
      } catch (NumberFormatException e) {
        speedup = 1;
      }
    }

    if (args.length >= 4) {
      try {
        blockSize = Integer.parseInt(args[3]);
      } catch (NumberFormatException e) {
        blockSize = 1;
      }
    }
    FilePlayback sp = new FilePlayback(hostname, port, dataDir, speedup, blockSize);
    sp.mainloop();
    sp.stop();
  }
Example #3
0
  public void mainloop() {

    while (!client.isConnected()) {
      try {
        System.out.println("Connecting to " + hostname + ":" + port);
        client.connect(hostname, port);
      } catch (IOException e) {
      }
      if (!client.isConnected()) {
        System.out.println("Couldn't connect. waiting");
        try {
          Thread.sleep(1000);
        } catch (InterruptedException e) {
          run = false;
          System.exit(-1);
        }
      }
    }

    // Load the header information in one go into a bytebuffer
    byte[] rawbytebuf = new byte[BUFFERSIZE];

    int n = 0;

    try {
      n = headerReader.read(rawbytebuf);
    } catch (IOException e) {
      e.printStackTrace();
    }

    // Byte-buffer used to parse the byte-stream. Force native ordering
    ByteBuffer hdrBuf = ByteBuffer.wrap(rawbytebuf, 0, n);
    hdrBuf.order(ByteOrder.nativeOrder());
    Header hdr = new Header(hdrBuf);
    if (VERB > 0) {
      System.out.println("Sending header: " + hdr.toString());
    }
    hdr.nSamples = 0; // reset number of samples to 0

    try {
      client.putHeader(hdr);
    } catch (IOException e) {
      e.printStackTrace();
    }

    // Interval between sending samples to the buffer
    int pktSamples = hdr.nChans * blockSize; // number data samples in each buffer packet
    int pktBytes = pktSamples * DataType.wordSize[hdr.dataType];
    int nsamp = 0; // sample counter
    int nblk = 0;
    int nevent = 0;
    byte[] samples = new byte[pktBytes];

    // Size of the event header: type,type_numel,val,val_numel,sample,offset,duration,bufsz
    int evtHdrSz = DataType.wordSize[DataType.INT32] * 8;
    byte[] evtRawBuf = new byte[BUFFERSIZE]; // buffer to hold complete event structure

    // Byte-buffer used to parse the byte-stream. Force native ordering
    ByteBuffer evtBuf = ByteBuffer.wrap(evtRawBuf);
    evtBuf.order(ByteOrder.nativeOrder());
    int payloadSz = 0;
    int evtSample = 0;
    int evtSz = 0;
    long sample_ms = 0;
    long starttime_ms = java.lang.System.currentTimeMillis();
    long elapsed_ms = 0;
    long print_ms = 0;

    // Now do the data forwarding
    boolean eof = false;

    while (!eof
        && run) { // The run switch allows control of stopping the thread and getting out of the
      // loop
      // Read one buffer packets worth of samples
      // increment the cursor position
      if (VERB > 0 && elapsed_ms > print_ms + 500) {
        print_ms = elapsed_ms;
        System.out.println(
            nblk
                + " "
                + nsamp
                + " "
                + nevent
                + " "
                + (elapsed_ms / 1000)
                + " (blk,samp,event,sec)\r");
      }

      // read and write the samples
      try {
        n = dataReader.read(samples);
      } catch (IOException e) {
        e.printStackTrace();
      }
      if (n <= 0) {
        eof = true;
        break;
      } // stop if run out of samples

      try {
        client.putRawData(blockSize, hdr.nChans, hdr.dataType, samples);
      } catch (IOException e) {
        e.printStackTrace();
      }

      // update the sample count
      nsamp += blockSize;
      while (evtSample <= nsamp) {
        if (evtSample > 0) { // send the current event
          try {
            client.putRawEvent(evtRawBuf, 0, evtSz);
          } catch (IOException e) {
            e.printStackTrace();
          }
          nevent++;
        }

        // read the next event
        try {
          n = eventReader.read(evtRawBuf, 0, evtHdrSz); // read the fixed size header
        } catch (IOException e) {
          e.printStackTrace();
        }
        if (n <= 0) {
          eof = true;
          break;
        }
        evtSample = ((ByteBuffer) evtBuf.position(4 * 4)).getInt(); // sample index for this event
        payloadSz = ((ByteBuffer) evtBuf.position(4 * 7)).getInt(); // payload size for this event
        evtSz = evtHdrSz + payloadSz;

        // read the variable part
        try {
          n = eventReader.read(evtRawBuf, evtHdrSz, payloadSz);
        } catch (IOException e) {
          e.printStackTrace();
        }
        if (n <= 0) {
          eof = true;
          break;
        }

        // print the event we just read
        if (VERB > 1) {
          ByteBuffer tmpev = ByteBuffer.wrap(evtRawBuf, 0, evtSz);
          tmpev.order(evtBuf.order());
          BufferEvent evt = new BufferEvent(tmpev);
          System.out.println("Read Event: " + evt);
        }
      }

      // sleep until the next packet should be send OR EOF
      /*when to send the next sample */
      sample_ms = (long) ((float) (nsamp * 1000) / hdr.fSample / (float) speedup);
      elapsed_ms = java.lang.System.currentTimeMillis() - starttime_ms; // current time
      if (sample_ms > elapsed_ms)
        try {
          Thread.sleep(sample_ms - elapsed_ms);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
      nblk++;
    }

    stop();
  }