/// <summary>
/// Returns data within the time range defined by the sample window without attempting to align.
/// </summary>
/// <param name="signalBuffer">The signal buffer that contains the data to be aligned.</param>
/// <param name="frameTime">The time of the frame that defines the current sample window.</param>
/// <returns>Data from the signal buffer within the time range defined by the sample window.</returns>
public List <IMeasurement> AlignNone(SignalBuffer signalBuffer, Ticks frameTime)
{
Ticks startTime = ((DateTime)frameTime) - m_frameOffset;
Ticks endTime = ((DateTime)startTime) + m_startOffset;
return(signalBuffer.GetMeasurements(startTime, endTime));
}
/// <summary>
/// Aligns data from the given signal buffer to the appropriate samples
/// in the sample window and fills in with null where data is missing.
/// </summary>
/// <param name="signalBuffer">The signal buffer that contains the data to be aligned.</param>
/// <param name="frameTime">The time of the frame that defines the current sample window.</param>
/// <returns>Data from the signal buffer aligned to the appropriate samples in the sample window.</returns>
public List <IMeasurement> AlignFill(SignalBuffer signalBuffer, Ticks frameTime)
{
List <IMeasurement> window = new List <IMeasurement>(m_windowSize);
Ticks startTime = ((DateTime)frameTime) - m_frameOffset;
Ticks maxDiff = (m_startOffset.Ticks / m_windowSize) / 2;
for (int i = 0; i < m_windowSize; i++)
{
TimeSpan startOffset = TimeSpan.FromTicks(m_startOffset.Ticks * i / m_windowSize);
Ticks targetTimestamp = ((DateTime)startTime) + startOffset;
IMeasurement nearestMeasurement = signalBuffer.GetNearestMeasurement(targetTimestamp);
Ticks diff = Math.Abs(nearestMeasurement.Timestamp - targetTimestamp);
if (diff <= maxDiff)
{
window.Add(nearestMeasurement);
}
else
{
window.Add(null);
}
}
return(window);
}
/// <summary>
/// Aligns data from the given signal buffer to the nearest samples in the sample window.
/// </summary>
/// <param name="signalBuffer">The signal buffer that contains the data to be aligned.</param>
/// <param name="frameTime">The time of the frame that defines the current sample window.</param>
/// <returns>Data from the signal buffer aligned to the nearest samples in the sample window.</returns>
public List <IMeasurement> AlignNearest(SignalBuffer signalBuffer, Ticks frameTime)
{
return(GetTimestamps(frameTime)
.Select(Timestamp => new { Timestamp, Measurement = signalBuffer.GetNearestMeasurement(Timestamp) })
.Where(obj => (object)obj.Measurement != null)
.Select(obj => ChangeTimestamp(obj.Measurement, obj.Timestamp))
.ToList());
}
/// <summary>
/// Aligns data from the given signal buffer to the nearest samples in the sample window.
/// </summary>
/// <param name="signalBuffer">The signal buffer that contains the data to be aligned.</param>
/// <param name="frameTime">The time of the frame that defines the current sample window.</param>
/// <returns>Data from the signal buffer aligned to the nearest samples in the sample window.</returns>
public List <IMeasurement> AlignNearest(SignalBuffer signalBuffer, Ticks frameTime)
{
List <IMeasurement> window = new List <IMeasurement>(m_windowSize);
Ticks startTime = ((DateTime)frameTime) - m_frameOffset;
for (int i = 0; i < m_windowSize; i++)
{
TimeSpan startOffset = TimeSpan.FromTicks(m_startOffset.Ticks * i / m_windowSize);
Ticks targetTimestamp = ((DateTime)startTime) + startOffset;
IMeasurement nearestMeasurement = signalBuffer.GetNearestMeasurement(targetTimestamp);
window.Add(nearestMeasurement);
}
return(window);
}
/// <summary>
/// Aligns data from the given signal buffer to the appropriate samples
/// in the sample window and fills in with null where data is missing.
/// </summary>
/// <param name="signalBuffer">The signal buffer that contains the data to be aligned.</param>
/// <param name="frameTime">The time of the frame that defines the current sample window.</param>
/// <returns>Data from the signal buffer aligned to the appropriate samples in the sample window.</returns>
public List <IMeasurement> AlignFill(SignalBuffer signalBuffer, Ticks frameTime)
{
Ticks maxDiff = (m_startOffset.Ticks / m_windowSize) / 2;
return(GetTimestamps(frameTime)
.Select(Timestamp => new { Timestamp, Measurement = signalBuffer.GetNearestMeasurement(Timestamp) })
.Where(obj => (object)obj.Measurement != null)
.Select(obj =>
{
Ticks timestamp = obj.Timestamp;
IMeasurement nearestMeasurement = obj.Measurement;
Ticks diff = Math.Abs(nearestMeasurement.Timestamp - timestamp);
return (diff <= maxDiff) ? nearestMeasurement : new Measurement()
{
Metadata = signalBuffer.Key.Metadata,
Timestamp = timestamp,
Value = double.NaN,
StateFlags = MeasurementStateFlags.UpSampled
};
})
.ToList());
}
