public StreamEngineTracker(StreamEngineTracker_Description description)
{
_streamEngineInteropWrapper = new StreamEngineInteropWrapper();
_customLog = new tobii_custom_log_t {
log_func = LogCallback
};
if (description == null)
{
description = new StreamEngineTracker_Description();
}
// Connect
StreamEngineContext context;
if (ConnectionHelper.TryConnect(_streamEngineInteropWrapper, description, out context, _customLog) == false)
{
throw new Exception("Failed to connect to tracker");
}
Context = context;
// Subscribe to requested streams
tobii_error_t result;
if (description.WearableDataCallback != null)
{
_wearableDataCallbackPointer = GCHandle.Alloc(description.WearableDataCallback);
result = Interop.tobii_wearable_consumer_data_subscribe(context.Device, WearableDataCallback, GCHandle.ToIntPtr(_wearableDataCallbackPointer));
if (result != tobii_error_t.TOBII_ERROR_NO_ERROR)
{
throw new Exception("Failed to subscribe to eye tracking data: " + result);
}
}
if (description.WearableAdvancedDataCallback != null)
{
_wearableAdvancedDataCallbackPointer = GCHandle.Alloc(description.WearableAdvancedDataCallback);
result = Interop.tobii_wearable_advanced_data_subscribe(context.Device, AdvancedWearableDataCallback, GCHandle.ToIntPtr(_wearableAdvancedDataCallbackPointer));
if (result != tobii_error_t.TOBII_ERROR_NO_ERROR)
{
throw new Exception("Failed to subscribe to eye tracking data: " + result);
}
}
if (description.WearableFoveatedDataCallback != null)
{
_wearableFoveatedDataCallbackPointer = GCHandle.Alloc(description.WearableFoveatedDataCallback);
result = Interop.tobii_wearable_foveated_gaze_subscribe(context.Device, WearableFoveatedGazeCallback, GCHandle.ToIntPtr(_wearableFoveatedDataCallbackPointer));
if (result != tobii_error_t.TOBII_ERROR_NO_ERROR)
{
throw new Exception("Failed to subscribe to eye tracking data: " + result);
}
}
// Get connection metadata
CheckForCapabilities(Context.Device);
tobii_feature_group_t licenseLevel;
Interop.tobii_get_feature_group(Context.Device, out licenseLevel);
LicenseLevel = licenseLevel;
}