Eli280XmlReaderProgram.cs

//
// Quick and Dirty way to read ELI 280 XML Files
// [email protected]
//
// .NET 5.0 / C# 8.0
//
using System;
using System.IO;
using System.Xml.Linq;

namespace Eli280EcgReader
{
    class Program
    {
        static void Main(string[] args)
        {
            XDocument xdoc = XDocument.Load(args[0]);

            XElement xroot = xdoc.Root;

            ReadTypicalCycles(xroot);

            ReadChannels(xroot);
        }

        private static void ReadTypicalCycles(XElement xroot)
        {
            using StreamWriter writer = File.CreateText("typicalCycles.csv");
            writer.WriteLine("Channel\tSample\tTime\tUnits\tMV");

            XElement typicalCycles = xroot.Element("TYPICAL_CYCLE");
            if (typicalCycles != null)
            {
                Console.WriteLine("Reading typical cycles...");

                double unitsPerMV = (int)typicalCycles.Attribute("UNITS_PER_MV");
                int samples = (int)typicalCycles.Attribute("DURATION");
                double sampleFreq = (int)typicalCycles.Attribute("SAMPLE_FREQ");
                foreach (XElement typicalCycle in typicalCycles.Elements("TYPICAL_CYCLE_CHANNEL"))
                {
                    string name = (string)typicalCycle.Attribute("NAME");
                    byte[] data = Convert.FromBase64String((string)typicalCycle.Attribute("DATA"));
                    Console.WriteLine($"\tReading Channel '{name}'...");

                    using BinaryReader reader = new BinaryReader(new MemoryStream(data));
                    for (int ss = 0; ss < samples; ++ss)
                    {
                        short sample = reader.ReadInt16();
                        writer.WriteLine($"{name}\t{ss}\t{ss/sampleFreq}\t{sample}\t{sample/unitsPerMV}");
                    }
                }
            }
        }
        
        private static void ReadChannels(XElement xroot)
        {
            using StreamWriter writer = File.CreateText("channels.csv");
            writer.WriteLine("Channel\tSample\tTime\tUnits\tMV");

            Console.WriteLine("Reading channels...");
            foreach (XElement channel in xroot.Elements("CHANNEL"))
            {
                double unitsPerMV = (int)channel.Attribute("UNITS_PER_MV");
                int samples = (int)channel.Attribute("DURATION");
                double sampleFreq = (int)channel.Attribute("SAMPLE_FREQ");

                string name = (string)channel.Attribute("NAME");
                byte[] data = Convert.FromBase64String((string)channel.Attribute("DATA"));
                Console.WriteLine($"\tReading Channel '{name}'...");

                using BinaryReader reader = new BinaryReader(new MemoryStream(data));
                for (int ss = 0; ss < samples; ++ss)
                {
                    short sample = reader.ReadInt16();
                    writer.WriteLine($"{name}\t{ss}\t{ss/sampleFreq}\t{sample}\t{sample/unitsPerMV}");
                }
            }
        }
    }
}