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();
}
