ASAP2MDFReaderExample

using jnsoft.Helpers;

namespace jnsoft.MDF.Examples.Reader;

/// <summary>
/// MDF Reader example.
///
/// - Loading an MDF file
/// - Read data as raw data samples.
/// - Iterating over measurement data
///
/// Usage: ASAP2MDFReaderExample MDFFile.mdf
/// </summary>
class Program
{
  /// <summary>
  /// Main function.
  /// </summary>
  /// <param name="args">The commandline arguments</param>
  /// <returns>Console application exitcode (0 if successful)</returns>
  static int Main(string[] args)
  {
    if (args.Length != 1)
    { // no args -> present usage
      Console.WriteLine($"{Extensions.AppName}({Extensions.AppVersion})");
      Console.WriteLine("\t- Read raw data samples from a MDF file...");
      Console.WriteLine("\t- Read and display physical measurement data from a MDF file...");
      Console.WriteLine("Required input: An MDF (measurement data format) file");
      Console.WriteLine("$Usage: {Application.ProductName} MDFFile.mdf");
      Console.WriteLine("$Example: {Application.ProductName} MDFExample.mdf");
      return -1;
    }

    try
    { // Open specified MDF file
      using var mdfFile = MDFReader.open(args[0]);
      Console.WriteLine($"Timeline: {mdfFile.getLength()} seconds, {mdfFile.getSamplePointCount():N0} sample points");

      var channels = new List<ICNBLOCK>(mdfFile.OpenChannels);
      var channel = channels.FirstOrDefault(x => x.ChannelType == ChannelType.Data && x.SignalType < SignalType.STRING);

      Console.WriteLine($"First data channel contains {channel.CGBlock.RecordCount} records.");
      var firstUnit = string.IsNullOrEmpty(channel.Unit) ? string.Empty : $" {channel.Unit}";

      // Iterate samples over a single data channel for the first 1.4 seconds
      foreach (var sample in mdfFile.enumSamples(channel, ValueObjectFormat.Physical, 0, 1.4))
        Console.WriteLine($"Channel = {channel.Name}: Time {sample.X}[s]={sample.Y}{firstUnit}");
      Console.WriteLine();

      // Iterate raw data samples over a single data channel for the first 1.4 seconds
      if (!mdfFile.getRawData(0, 1.4, channel, out var rawData, out var rawLimitX))
        // failed to read raw data
        return -2;
      foreach (var entry in rawData)
        Console.WriteLine($"Channel = {channel.Name}(Raw data): Time {entry.Timestamp}[s]={BitConverter.ToString(entry.Data)}");
      Console.WriteLine();

      // read all samples as physical values from the first 1.4 seconds
      foreach (var group in mdfFile.OpenChannelGroups)
      {
        if (!mdfFile.getData(group, out double[][] data, ValueObjectFormat.Physical, 0, 1.4))
          // no data available
          continue;

        var time = data[0];
        var sampleCnt = time.Length;
        for (int chnIdx = 1; chnIdx < group.CNBlocks.Count; ++chnIdx)
        { // iterate over data channels
          channel = group.CNBlocks[chnIdx];
          var unit = string.IsNullOrEmpty(channel.Unit) ? string.Empty : $" {channel.Unit}";
          for (int i = 0; i < sampleCnt; ++i)
            Console.WriteLine($"Channel = {channel.Name}: Time {time[i]}[s]={data[chnIdx][i]}{unit}");
        }
      }
      return 0;
    }
    catch (Exception ex)
    {
      Console.WriteLine($"Something failed, file not found or unsupported\n{ex.Message}");
      return -2;
    }
  }
}