80 lines
3.1 KiB
C#
80 lines
3.1 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using DTS.Common.DAS.Concepts;
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namespace DTS.Serialization
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{
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/// <summary>
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/// A collection of a channel and associated metadata that will all be needed together when
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/// this file format starts laying down bytes.
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/// </summary>
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public class ChannelWithMeta
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{
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/// <summary>
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/// Get/set the <see cref="DTS.Serialization.Test.Module.Channel"/> to be serialized.
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/// </summary>
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public Test.Module.Channel Channel { get; }
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/// <summary>
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/// Get/set the <see cref="DataScaler"/> associated with the
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/// specified channel.
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/// </summary>
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public DataScaler Scaler { get; }
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/// <summary>
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/// Get/set the <see cref="double"/> sample rate associated with the specified channel.
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/// </summary>
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public double SampleRate { get; }
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/// <summary>
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/// Get/set the <see cref="double"/> start time associated with the specified channel.
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/// </summary>
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public double StartTime { get; }
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/// <summary>
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/// Initialize an instance of the ChannelWithMeta class.
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/// </summary>
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///
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/// <param name="channel">
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/// A <see cref="DTS.Serialization.Test.Module.Channel"/> to be serialized.
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/// </param>
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///
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/// <param name="scaler">
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/// The <see cref="DataScaler"/> containing scaling information for
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/// the specified channel.
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/// </param>
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///
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/// <param name="samplerate">
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/// The <see cref="double"/> sample rate of the associated channel.
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/// </param>
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///
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/// <param name="starttime">
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/// The <see cref="double"/> start time of the associated channel.
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/// </param>
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///
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public ChannelWithMeta(DTS.Serialization.Test.Module.Channel channel, DataScaler scaler, double samplerate, double starttime)
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{
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Channel = channel;
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Scaler = scaler;
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SampleRate = samplerate;
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StartTime = starttime;
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}
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public static double GetMinStartTime(double start, IList<ChannelWithMeta> channelsWithMeta)
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{
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// Start is a generally a negative value, so to get the value for the start time of the minimum common data set, run Max()
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return Math.Max(start, channelsWithMeta.Min(cwm => cwm.StartTime));
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}
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public static double GetMinStopTime(double stop, IList<ChannelWithMeta> channelsWithMeta)
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{
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// To get the value for the stop time of the minimum common data set, run Min()
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// LINQ statement will sometimes hand back float-rounding error numbers (4.999999999999995 v 5.0), so cast to decimals.
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return (double)Math.Min((decimal)stop,
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channelsWithMeta.Min(cwm =>
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(decimal)cwm.StartTime + (cwm.Channel.PersistentChannelInfo.Length - 1) * 1m / (decimal)cwm.SampleRate));
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}
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}
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}
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