/// <summary>
/// Read from the LSL stream for server status
/// </summary>
async Task RunReadStatusPortAsync(CancellationToken cancelToken)
{
ReportNetworkTimeInterval.Restart();
StreamInlet inlet = null;
try
{
inlet = new StreamInlet(StatusStream);
cancelToken.Register(() => inlet.close_stream());
inlet.open_stream();
SyncedTime = false;
SetBoardProperties(inlet);
Log?.Invoke(this, new LogEventArgs(HostName, this, "RunReadStatusPortAsync", $"Create LSL stream for status on host {HostName}.", LogLevel.DEBUG));
HatConnectionChanged?.Invoke(this, new HatConnectionEventArgs(HatConnectionState.Discovered, HostName, "", BoardId, SampleRate));
string[,] samples = new string[32, 1];
double[] timestamps = new double[32];
// spin until canceled
while (!cancelToken.IsCancellationRequested)
{
await Task.Delay(StatusReadingDelay);
try
{
var sampleCount = inlet.pull_chunk(samples, timestamps);
if (sampleCount > 0 && (samples[sampleCount - 1, 0].Length > 0))
{
await ParseServerStatus(samples[sampleCount - 1, 0]);
}
}
catch (ObjectDisposedException)
{ }
catch (Exception ex)
{
Log?.Invoke(this, new LogEventArgs(HostName, this, "RunReadStatusPortAsync", ex, LogLevel.WARN));
}
}
}
catch (OperationCanceledException)
{ }
catch (Exception e)
{
Log?.Invoke(this, new LogEventArgs(this, "RunReadStatusPortAsync", e, LogLevel.FATAL));
}
finally
{
if (inlet != null)
{
inlet.close_stream();
}
}
}
/// <summary>
/// Run function for reading data on LSL multicast data port
/// </summary>
async Task RunReadDataPortAsync(CancellationToken cancelToken)
{
StreamInlet inlet = null;
try
{
int maxChunkLen = (int)((SampleRate * 1.5) / ReadingDelay);
inlet = new StreamInlet(DataStream, 360, maxChunkLen);
cancelToken.Register(() => inlet.close_stream());
inlet.open_stream();
Log?.Invoke(this, new LogEventArgs(HostName, this, "RunReadDataPortAsync", $"Create LSL data stream for host {HostName}.", LogLevel.DEBUG));
double[,] buffer = new double[512, SampleSize];
double[] timestamps = new double[512];
// spin until canceled
while (!cancelToken.IsCancellationRequested)
{
await Task.Delay(ReadingDelay);
try
{
int num = inlet.pull_chunk(buffer, timestamps);
ProcessChunk(buffer, num);
}
catch (ObjectDisposedException)
{ }
catch (Exception ex)
{
Log?.Invoke(this, new LogEventArgs(HostName, this, "RunReadDataPortAsync", ex, LogLevel.WARN));
}
}
}
catch (OperationCanceledException)
{ }
catch (Exception e)
{
Log?.Invoke(this, new LogEventArgs(this, "RunReadDataPortAsync", e, LogLevel.FATAL));
}
finally
{
if (inlet != null)
{
inlet.close_stream();
}
}
}