public WebBrowserAssistantEngine(Session session)
{
var paradigm = _paradigm = (WebBrowserAssistantParadigm)session.Paradigm;
if (!session.StreamerCollection.TryFindFirst(out _markerStreamer))
{
throw new UserException("Marker streamer not found");
}
if (!session.StreamerCollection.TryFindFirst(out _gazePointStreamer))
{
throw new UserException("Gaze-point streamer not found");
}
if (!session.StreamerCollection.TryFindFirst(out _biosignalStreamer))
{
throw new UserException("Biosignal streamer not found");
}
_server = new WebBrowserAssistantServer(session);
_server.AddMessageHandler(this);
_server.ActiveClientChanged += (sender, e) =>
{
if (e.OldValue == null)
{
_hasActiveClient.Set();
}
else
{
if (e.NewValue == null)
{
_hasActiveClient.Reset();
}
InterruptTrial();
}
};
_server.ClientDimensionsChanged += (sender, e) =>
{
if (e.IsActiveClient)
{
InterruptTrial();
}
};
_server.ClientSceneChanged += (sender, e) =>
{
if (e.IsActiveClient)
{
InterruptTrial();
}
};
_modeOnSetInterceptor = new ModeOnSetInterceptor();
_modeOnSetInterceptor.ModeOnSet += (sender, e) => Mode = e;
_gazePointProvider = new GazePointProvider();
_dwellTrialController = new DwellTrialController(session.Clock, _gazePointProvider, paradigm.Config.User);
_dwellTrialController.Triggered += (sender, e) => _trialStartEvent.Set();
_dwellTrialController.Cancelled += (sender, e) => _trialCancelled.Set();
var stimulationScheme = paradigm.Config.User.StimulationScheme;
var samplingRate = _biosignalStreamer.BiosignalSource.Frequency;
var frequencies = stimulationScheme.Frequencies;
var interFrequencies = new float[frequencies.Count - 1];
for (var i = 0; i < interFrequencies.Length; i++)
{
interFrequencies[i] = (frequencies[i] + frequencies[i + 1]) / 2;
}
var frequencyPatterns = frequencies.Concat(interFrequencies).Select(f => new CompositeTemporalPattern <SinusoidalPattern>(new SinusoidalPattern(f))).ToArray();
var bandMixingParams = new SubBandMixingParams(1.25, 0.25);
var channels = paradigm.Config.System.Channels.Enumerate(1, _biosignalStreamer.BiosignalSource.ChannelNum).Select(i => (uint)(i - 1)).ToArray();
_navigatingSsvepDetector = new HybridSsvepIdentifier(session.Clock, 4, frequencyPatterns, stimulationScheme.FilterBank, bandMixingParams,
stimulationScheme.HarmonicCount, 0, channels, samplingRate, paradigm.Config.User.StimulationDuration.Navigating, 0);
_spellingSsvepDetector = new HybridSsvepIdentifier(session.Clock, 4, frequencyPatterns, stimulationScheme.FilterBank, bandMixingParams,
stimulationScheme.HarmonicCount, 0, channels, samplingRate, paradigm.Config.User.StimulationDuration.Spelling, 0);
_frequencyCount = stimulationScheme.Frequencies.Count;
}
public WebBrowserAssistantServer(Session session)
{
_paradigm = (WebBrowserAssistantParadigm)session.Paradigm;
_messageHandlers.AddLast(this);
}