public void initializeBuffer()
{
if (hostname == null)
{
//hostname = GetLocalIPAddress ();
hostname = "127.0.0.1";
}
Debug.Log("Connecting to " + hostname + ":" + port);
if (!bufferClient.isConnected()) // attempt to re-connect
{
bufferClient.connect(hostname, port);
}
if (bufferClient.isConnected())
{
Debug.Log("Connected to " + hostname + ":" + port + " succeeded");
hdr = bufferClient.getHeader();
if (bufferClient.errorReturned == BufferClient.BUFFER_READ_ERROR)
{
Debug.Log("No header on " + hostname + ":" + port + " failed");
bufferConnectionInitialized = false;
return;
}
latestBufferSample = hdr.nSamples;
lastNumberOfEvents = hdr.nEvents;
nChans = hdr.nChans;
fSample = hdr.fSample;
if (storeData)
{
initializeData();
}
bufferTimer = new BufferTimer(fSample);
Debug.Log("Got valid header on " + hostname + ":" + port);
// compute the min-update-interval in samples
if (MINUPDATEINTERVAL_ms > 0)
{
DATAUPDATEINTERVAL_SAMP = (int)(MINUPDATEINTERVAL_ms * 1000.0 / hdr.fSample);
if (DATAUPDATEINTERVAL_SAMP < 1)
{
DATAUPDATEINTERVAL_SAMP = 1;
}
}
bufferConnectionInitialized = true;
if (bufferUpdateThread == null)
{
bufferUpdateThread = new Thread(run)
{
Name = "BufferUpdateThread"
};
bufferUpdateThread.Start(); // start the buffer-monitoring thread
}
}
else
{
Debug.Log("Connection to " + hostname + ":" + port + " failed");
bufferConnectionInitialized = false;
return;
}
}
// 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;
}
}
