private async Task LSLOpenStream()
{
bool sendSecondaryTimestamp = TimestampFormat2.GetType() != typeof(DummyTimestampFormat);
var channelsInfo = new List <LSLBridgeChannelInfo>();
foreach (var c in channelLabels)
{
channelsInfo.Add(new LSLBridgeChannelInfo {
Label = c, Type = Constants.EEG_STREAM_TYPE, Unit = Constants.EEG_UNITS
});
}
streamInfo = new LSLBridgeStreamInfo()
{
BufferLength = Constants.MUSE_LSL_BUFFER_LENGTH,
Channels = channelsInfo,
ChannelCount = channelCount,
ChannelDataType = ChannelDataType.DataType,
ChunkSize = Constants.MUSE_SAMPLE_COUNT,
DeviceManufacturer = deviceInfoManufacturer,
DeviceName = deviceInfoName,
NominalSRate = Constants.MUSE_SAMPLE_RATE,
StreamType = Constants.EEG_STREAM_TYPE,
SendSecondaryTimestamp = sendSecondaryTimestamp,
StreamName = EEGStreamName
};
ValueSet message = new ValueSet
{
{ LSLBridge.Constants.LSL_MESSAGE_STREAM_INFO, JsonConvert.SerializeObject(streamInfo) }
};
await AppServiceManager.SendMessageAsync(LSLBridge.Constants.LSL_MESSAGE_TYPE_OPEN_STREAM, message);
}
// Get timestamps for a chunk using LSL local_clock.
public static double[] GenerateLSLNativeTimestamps(LSLBridgeStreamInfo streamInfo)
{
int chunkSize = streamInfo.ChunkSize;
double sampleTimeSeconds = 1.0d / streamInfo.NominalSRate;
double[] timestamps = new double[chunkSize];
double baseSeconds = liblsl.local_clock(); // local_clock in seconds.
for (int i = 0; i < streamInfo.ChunkSize; i++)
{
timestamps[i] = baseSeconds - ((chunkSize - i) * sampleTimeSeconds); // Offset times based on sample rate.
timestamps[i] = timestamps[i]; // Convert to seconds, as this is a more standard timestamp format.
}
return(timestamps);
}