// Find events from the buffer and process them according to their type.
public void processBufferEvents()
{
int timeout = 5000;
print(hdr.nEvents);
try
{
print("Waiting for events...");
SamplesEventsCount sec = client.waitForEvents(nEvents - 1, timeout);
if (sec.nEvents > nEvents)
{
BufferEvent[] evs = client.getEvents(nEvents, sec.nEvents - 1);
nEvents = sec.nEvents;
print("Got " + evs.Length + " events");
//grab the newest event (This means it only take 1 event every update)
BufferEvent evt = evs[evs.Length - 1];
string evttype = evt.getType().toString();
// Handle Exit event
if (evttype.Equals("exit"))
{
client.disconnect();
}
// Handle keyboard events
else if (evttype.Equals("keyboard"))
{
predictions = evt.getValue().toString();
currentBCIAction = predictions;
print(predictions);
}
// handle predictions events
else if (evttype.Equals("classifier.prediction"))
{
// Get highest prediction
predictionArray = (double[])evt.getValue().array;
double maxValue = predictionArray.Max();
int maxIndex = predictionArray.ToList().IndexOf(maxValue);
highestPredictionindex = maxIndex;
// set variable to index of highest prediction or some other boundary.
//highestPredictionindex = 1;
}
}
}
catch
{
print("catch Error");
}
}
void Update()
{
if (bufferClient.errorReturned != BufferClient.BUFFER_READ_ERROR && bufferIsConnected)
{
SamplesEventsCount count = bufferClient.wait(latestCapturedSample + 1, lastNumberOfEvents + 1, timeout);
latestNumebrOfEventsInBuffer = count.nEvents;
latestBufferSample = count.nSamples;
while (lastNumberOfEvents < latestNumebrOfEventsInBuffer)
{
bufferEvents.Add(bufferClient.getEvents(lastNumberOfEvents, lastNumberOfEvents)[0]);
lastNumberOfEvents += 1;
if (bufferEvents.Count > bufferEventsMaxCapacity)
{
bufferEvents.RemoveAt(0);
}
OnNewEventsAdded(EventArgs.Empty); //This notifies anyone who's listening that there had been an extra event added in the buffer
}
if (latestBufferSample > latestCapturedSample)
{
nSamples = latestBufferSample - latestCapturedSample;
data = bufferClient.getFloatData(latestCapturedSample, latestBufferSample - 1); //TO DO: The getFloat needs to change according to the buffers type of data
bufferTimer.addSampleToRegression(latestBufferSample); //Updates the bufferTimer with the new samples.
latestCapturedSample = latestBufferSample;
OnNewDataCaptured(EventArgs.Empty); //That notifies anyone who's listening that data have been updated in the buffer
if (newDataIn)
{
dataPacketsLost += 1;
}
else
{
newDataIn = true;
}
}
}
}
// N.B. this function is called EVERY VIDEO FRAME!..... so should be as fast as possible...
// TODO: the buffer communication should really move to be in a seperate thread!!!
void updateBuffer()
{
if (bufferClient != null && bufferConnectionInitialized)
{
//int dataTrigger=-1;
//if ( storeData ) {
// dataTrigger = latestCapturedSample+DATAUPDATEINTERVAL_SAMP;
//}
SamplesEventsCount count = null;
bufferIsConnected = bufferClient.isConnected();
if (!bufferIsConnected) // if we are not connected try to re-connect..
{
Debug.LogError("Buffer connection closed..... trying to reconnect!");
bufferClient.reconnect();
return;
}
try {
count = bufferClient.poll();
} catch { // poll failed.... why?
Debug.LogError("Poll failed.... waiting for valid response!");
return;
}
latestNumberOfEventsInBuffer = count.nEvents;
latestBufferSample = count.nSamples;
// reset if we have been re-awoken
if (latestCapturedSample < 0)
{
latestCapturedSample = latestBufferSample;
}
if (lastNumberOfEvents < 0)
{
lastNumberOfEvents = latestNumberOfEventsInBuffer;
}
if (latestBufferSample < latestCapturedSample)
{
Debug.LogError("Buffer restart detected .. skipping everything before now...");
bufferTimer.reset();
latestCapturedSample = latestBufferSample;
lastNumberOfEvents = latestNumberOfEventsInBuffer;
}
bufferTimer.addSampleToRegression(latestBufferSample); //Updates the bufferTimer with the new samples.
// Loop ot push events to the event stream
while (lastNumberOfEvents < latestNumberOfEventsInBuffer)
{
try { // Watch out can miss events if we are too slow...
bufferEvents.Add(bufferClient.getEvents(lastNumberOfEvents, lastNumberOfEvents)[0]);
} catch (IOException ex) {
}
lastNumberOfEvents += 1;
if (bufferEvents.Count > bufferEventsMaxCapacity) // Implement a ring-buffer for the events we store...
{
bufferEvents.RemoveAt(0);
}
OnNewEventsAdded(EventArgs.Empty); //This notifies anyone who's listening that there had been an extra event added in the buffer
}
lastNumberOfEvents = latestNumberOfEventsInBuffer;
// push new data into the data event stream
if (latestBufferSample > latestCapturedSample)
{
if (storeData) // if we should track and store the data
{
storedSamples = latestBufferSample - latestCapturedSample;
if (storedSamples * nChans > MAXDATASAMPLES)
{
storedSamples = MAXDATASAMPLES / nChans;
}
data = bufferClient.getFloatData(latestBufferSample - storedSamples, latestBufferSample - 1); //TO DO: The getFloat needs to change according to the buffers type of data
OnNewDataCaptured(EventArgs.Empty); //That notifies anyone who's listening that data have been updated in the buffer
if (newDataIn)
{
dataPacketsLost += 1;
}
else
{
newDataIn = true;
}
}
}
latestCapturedSample = latestBufferSample;
}
}
// N.B. this function is called EVERY VIDEO FRAME!..... so should be as fast as possible...
// TODO: the buffer communication should really move to be in a seperate thread!!!
void Update()
{
if (bufferIsConnected && bufferClient != null && bufferClient.errorReturned != BufferClient.BUFFER_READ_ERROR && bufferClient.isConnected())
{
//int dataTrigger=-1;
//if ( storeData ) {
// dataTrigger = latestCapturedSample+DATAUPDATEINTERVAL_SAMP;
//}
SamplesEventsCount count = bufferClient.poll();
latestNumberOfEventsInBuffer = count.nEvents;
latestBufferSample = count.nSamples;
// reset if we have been re-awoken
if (latestCapturedSample < 0)
{
latestCapturedSample = latestBufferSample;
}
if (lastNumberOfEvents < 0)
{
lastNumberOfEvents = latestNumberOfEventsInBuffer;
}
while (lastNumberOfEvents < latestNumberOfEventsInBuffer)
{
try { // Watch out can miss events if we are too slow...
bufferEvents.Add(bufferClient.getEvents(lastNumberOfEvents, lastNumberOfEvents)[0]);
} catch (IOException ex) {
}
lastNumberOfEvents += 1;
if (bufferEvents.Count > bufferEventsMaxCapacity) // Implement a ring-buffer for the events we store...
{
bufferEvents.RemoveAt(0);
}
OnNewEventsAdded(EventArgs.Empty); //This notifies anyone who's listening that there had been an extra event added in the buffer
}
lastNumberOfEvents = latestNumberOfEventsInBuffer;
if (latestBufferSample > latestCapturedSample)
{
if (storeData) // if we should track and store the data
{
storedSamples = latestBufferSample - latestCapturedSample;
if (storedSamples * nChans > MAXDATASAMPLES)
{
storedSamples = MAXDATASAMPLES / nChans;
}
data = bufferClient.getFloatData(latestBufferSample - storedSamples, latestBufferSample - 1); //TO DO: The getFloat needs to change according to the buffers type of data
OnNewDataCaptured(EventArgs.Empty); //That notifies anyone who's listening that data have been updated in the buffer
if (newDataIn)
{
dataPacketsLost += 1;
}
else
{
newDataIn = true;
}
}
}
else if (latestBufferSample < latestCapturedSample)
{
Debug.LogError("Buffer restart detected");
bufferTimer.reset();
}
bufferTimer.addSampleToRegression(latestBufferSample); //Updates the bufferTimer with the new samples.
latestCapturedSample = latestBufferSample;
}
}
public static int Main(String[] args)
{
String hostname = "localhost";
int port = 1972;
int timeout = 5000;
if (args.Length >= 1)
{
hostname = args[0];
}
if (args.Length >= 2)
{
try {
port = Convert.ToInt32(args[1]);
}
catch { // (NumberFormatException e)
port = 0;
}
if (port <= 0)
{
System.Console.WriteLine("Second parameter (" + args[1] + ") is not a valid port number.");
return(1);
}
}
if (args.Length >= 3)
{
try {
port = Convert.ToInt32(args[2]);
}
catch { // (NumberFormatException e)
timeout = 5000;
}
}
BufferClientClock C = new BufferClientClock();
Header hdr = null;
while (hdr == null)
{
try {
System.Console.Write("Connecting to " + hostname + ":" + port + "...");
C.connect(hostname, port);
System.Console.WriteLine("done");
System.Console.Write("Getting Header...");
if (C.isConnected())
{
hdr = C.getHeader();
}
System.Console.WriteLine("done");
} catch { //(IOException e)
hdr = null;
}
if (hdr == null)
{
System.Console.WriteLine("Invalid Header... waiting");
System.Threading.Thread.Sleep(1000);
}
}
System.Console.WriteLine("#channels....: " + hdr.nChans);
System.Console.WriteLine("#samples.....: " + hdr.nSamples);
System.Console.WriteLine("#events......: " + hdr.nEvents);
System.Console.WriteLine("Sampling Freq: " + hdr.fSample);
System.Console.WriteLine("data type....: " + hdr.dataType);
for (int n = 0; n < hdr.nChans; n++)
{
if (hdr.labels[n] != null)
{
System.Console.WriteLine("Ch. " + n + ": " + hdr.labels[n]);
}
}
// Now do the echo-server
int nEvents = hdr.nEvents;
endExpt = false;
while (!endExpt)
{
SamplesEventsCount sec = C.waitForEvents(nEvents, timeout); // Block until there are new events
if (sec.nEvents > nEvents)
{
// get the new events
BufferEvent[] evs = C.getEvents(nEvents, sec.nEvents - 1);
//float[][] data = C.getFloatData(0,sec.nSamples-1); // Example of how to get data also
nEvents = sec.nEvents;// update record of which events we've seen
// filter for ones we want
System.Console.WriteLine("Got " + evs.Length + " events");
for (int ei = 0; ei < evs.Length; ei++)
{
BufferEvent evt = evs[ei];
String evttype = evt.getType().toString(); // N.B. to*S*tring, not upper case!
// only process if it's an event of a type we care about
// In our case, don't echo our own echo events....
if (!evttype.Equals("echo")) // N.B. use equals, not == to compare string contents!
{
if (evttype.Equals("exit")) // check for a finish event
{
endExpt = true;
}
// Print the event to the console
System.Console.WriteLine(ei + ") t:" + evt.getType().toString() + " v:" + evt.getValue().toString() + " s:" + evt.sample);
// Now create the echo event, with auto-completed sample number
// N.B. -1 for sample means auto-compute based on the real-time-clock
C.putEvent(new BufferEvent("echo", evt.getValue().toString(), -1));
}
}
}
else // timed out without new events
{
System.Console.WriteLine("Timeout waiting for events");
}
}
System.Console.WriteLine("Normal Exit");
C.disconnect();
return(0);
}
