/// <summary>
/// Write data to the Event Server. This write operation is used when the sampleIndicies in the newData buffer
/// correspond to the start of a DAQ buffer poll rather than the start of the recording.
/// </summary>
/// <param name="newData"></param>
/// <param name="taskNo"></param>
internal void WriteToBufferRelative(EventBuffer <T> newData, int taskNo)
{
lock (lockObj)
{
// First we must remove the expired samples (we cannot assume these are
// in temporal order since for 64 channels, we have to write 2x, once for
// each 32 channel recording task)
if (minCurrentSample > bufferSizeInSamples)
{
dataBuffer.Buffer.RemoveAll(x => x.SampleIndex < minCurrentSample - (ulong)bufferSizeInSamples);
}
// Move time stamps to absolute scheme
for (int i = 0; i < newData.Buffer.Count; ++i)
{
// Convert time stamps to absolute scheme
T tmp = (T)newData.Buffer[i].DeepClone();
tmp.SampleIndex = tmp.SampleIndex + currentSample[taskNo];
dataBuffer.Buffer.Add(tmp);
// Only add to the NewData buffer it is going to be cleared later
if (NewData != null)
{
newDataBuffer.Buffer.Add(tmp);
}
}
// Update current read-head position
currentSample[taskNo] += (ulong)numSamplesPerWrite;
if (serverLagSamples < currentSample.Min())
{
minCurrentSample = currentSample.Min() - serverLagSamples;
}
else
{
minCurrentSample = 0;
}
// Fire the new data event (only fire if the incoming buffer was not empty and somebody is listening)
if (NewData != null && taskNo == 0)
{
eventArgs = new NewEventDataEventArgs <T>(newDataBuffer);
NewData(this, eventArgs);
newDataBuffer.Buffer.Clear();
}
}
}
/// <summary>
/// Write data to the Event Server
/// </summary>
/// <param name="newData">An event buffer containing the events to add to the server</param>
/// <param name="taskNo"> The NI task that created these new data</param>
internal void WriteToBuffer(EventBuffer <T> newData, int taskNo)
{
lock (lockObj)
{
// First we must remove the expired samples (we cannot assume these are
// in temporal order since for 64 channels, we have to write 2x, once for
// each 32 channel recording task)
if (minCurrentSample > bufferSizeInSamples)
{
dataBuffer.Buffer.RemoveAll(x => x.SampleIndex < (minCurrentSample - (ulong)bufferSizeInSamples));
}
// Add new data to main buffer
dataBuffer.Buffer.AddRange(newData.Buffer);
// Update current read-head position
currentSample[taskNo] += (ulong)numSamplesPerWrite;
//The most up to date read position in the buffer is determined by the slowest input task
if (serverLagSamples < currentSample.Min())
{
minCurrentSample = currentSample.Min() - serverLagSamples;
}
else
{
minCurrentSample = 0;
}
// Fire the new data event (only fire if the incoming buffer was not empty and somebody is listening)
if (NewData != null)
{
// Create space to sore new data
newDataBuffer.Buffer.AddRange(newData.Buffer);
if (taskNo == 0)
{
eventArgs = new NewEventDataEventArgs <T>(newDataBuffer);
NewData(this, eventArgs);
newDataBuffer.Buffer.Clear();
}
}
}
}
