Shaker/Avalonia/ShakerApp/ViewModels/ShakerDataViewModel.cs

using Avalonia.Media;
using OxyPlot;
using Shaker.Models;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace ShakerApp.ViewModels
{
    internal class ShakerDataViewModel:DisplayViewModelBase<IModel>
    {
        private Dictionary<string, Queue<byte[]>> THDDataCache = new Dictionary<string, Queue<byte[]>>();
        public IReadOnlyList<string> AllowTHDChannels = new List<string>() { "MeasuredDisplacementSignal", "AccelerationSignal" };
        public TDMS.ITDMSFile File => tdmsfile;
        List<Models.StatisticsModel> statistics = new List<Models.StatisticsModel>();
        [AllowNull]
        private TDMS.ITDMSFile tdmsfile;
        private object _datalocker = new object();
        private Dictionary<Shaker.Models.AnalogType, List<(List<DataPoint>,Models.StatisticsModel)>> AnalogDataCache = new Dictionary<AnalogType, List<(List<DataPoint>, Models.StatisticsModel)>>();
        private ShakerDataViewModel()
        {
            foreach (var item in AllowTHDChannels)
            {
                THDDataCache[item] = new Queue<byte[]>();
            }
            GetEvent<AllConfig>().Subscrip((sender, args) =>
            {
                CommunicationViewModel.Instance.LocalCommunication.GetEvent(Topic.DATA)?.Subscrip((sender, args) =>
                {
                    if(args.Data.Length>=3 && args.Data[0] is byte[] v && args.Data[1] is uint row && args.Data[2] is uint col)
                    {
                        ReceiveData(v, row, col);
                    }
                });
            });
        }
        private void ReceiveData(byte[] data, uint row, uint col)
        {
            if (row == 0 || col == 0) return;
           var rawdata  = Shaker.Models.Tools.Tools.DecompressionBytes(data);
            switch (ViewModels.ShakerStatusViewModel.Instance.RTStatus)
            {
                case RTStatus.SignalGen:
                    {
                        if (tdmsfile == null)
                        {
                            tdmsfile = TDMS.TDMSDataBuilder.BuildNew(System.IO.Path.Combine(ViewModels.ShakerSettingViewModel.Instance.DataDirectory, $"{DateTime.Now:yyyy-MM-dd HH-mm-ss}.tdms"),"Data");
                            Dictionary<string, string> config = new Dictionary<string, string>();
                            ShakerControlViewModel.Instance.SaveTdmsConfig(tdmsfile);
                            MainPageViewModel.Instance.SaveTdmsConfig(tdmsfile);
                            DeviceMangerViewModel.Instance.CurrentDevice?.SaveTdmsConfig(tdmsfile);
                        }
                    }
                    break;
                default:
                    if (tdmsfile != null)
                    {
                        tdmsfile.Save();
                        tdmsfile.Close();
                        tdmsfile.Dispose();
                        tdmsfile = null;
                    }
                    break;
            }
            CalcAnalog(rawdata, row, col);
            if (ShakerStatusViewModel.Instance.RTStatus == RTStatus.SignalGen && tdmsfile != null)
            {
                MainPageViewModel.Instance.SaveTestData(tdmsfile);
                tdmsfile.Save();
            }
            CommunicationViewModel.Instance.ServiceCommunication?.GetEvent(Topic.DATA)?.Publish(this, null);
        }

        static ShakerDataViewModel()
        {

        }
        public List<(List<DataPoint>, Models.StatisticsModel)> GetAnalogData(AnalogType analogType)
        {
            lock(_datalocker)
            {
                if(AnalogDataCache.TryGetValue(analogType,out var list))
                {
                    if (list == null) return new List<(List<DataPoint>, Models.StatisticsModel)>();
                    return list;
                }
                return new List<(List<DataPoint>, Models.StatisticsModel)>();
            }
        }
        public List<double[]> GetAnalogRawData(AnalogType analogType)
        {
            lock (_datalocker)
            {
                if (AnalogDataCache.TryGetValue(analogType, out var list))
                {
                    if (list == null) return new List<double[]>();
                    return list.Select(x=>x.Item1.Select(x=>x.Y).ToArray()).ToList();
                }
                return new List<double[]>();
            }
        }
        public Models.StatisticsModel? GetStatistics(string name)
        {
            lock(_datalocker)
            {
                return statistics.FirstOrDefault(x => x.Name == name);
            }
        }
        public double[] GetAnalogRawData(int index)
        {
            lock (_datalocker)
            {
                if (index >= ShakerConfigViewModel.Instance.Model.AnalogSignalConfigs.Count) return new double[0];
                var type = ShakerConfigViewModel.Instance.Model.AnalogSignalConfigs[index].AnalogType;
                int seindex = 0;
                if (index > 0)
                {
                    seindex = ShakerConfigViewModel.Instance.Model.AnalogSignalConfigs.Take(index).Count(x => x.AnalogType == type);
                }
                return AnalogDataCache[type][seindex].Item1.Select(x => x.Y).ToArray();
            }
        }
        private unsafe void CalcAnalog(byte[] data,uint row,uint col)
        {
            if (data.Length == 0 || row == 0 || col == 0 || data.Length<row*col*Unsafe.SizeOf<float>()) return;
            int bytecount = Unsafe.SizeOf<float>();
            byte* tempdata = stackalloc byte[data.Length];
            Unsafe.CopyBlock(ref Unsafe.AsRef<byte>(tempdata), ref data[0], (uint)data.Length);
            lock (_datalocker)
            {
                AnalogDataCache.Clear();
                statistics.Clear();
                for (int i = 0; i < ShakerConfigViewModel.Instance.AnalogSignals.Count; i++)
                {
                    if (i >= row) break;
                    List<DataPoint> dataPoints = new List<DataPoint>();
                    float max = float.MinValue;
                    float min = float.MaxValue;
                    float v = 0;
                    for (int j= 0; j < col; j++)
                    {
                        float tempv = Unsafe.As<byte, float>(ref tempdata[j * bytecount + i * col * bytecount]);
                        dataPoints.Add(new DataPoint(1.0 / ShakerConfigViewModel.Instance.SampleRate * j, tempv));
                        max = tempv > max ? tempv : max;
                        min = tempv < min ? tempv : min;
                        v += tempv;
                    }
                    float thd = 0;
                    if (AllowTHDChannels.Contains(ShakerConfigViewModel.Instance.AnalogSignals[i].Value.Name))
                    {
                        var queue = THDDataCache[ShakerConfigViewModel.Instance.AnalogSignals[i].Value.Name];
                        if (ShakerStatusViewModel.Instance.RTStatus == RTStatus.SignalGen && MainPageViewModel.Instance.MainPage is SineMainPageViewModel sine)
                        {
                            int framecount = (int)Math.Ceiling(1 / sine.CurrentFrequency);
                            if(framecount>1)
                            {
                                byte[] currentchanneldata = new byte[col * Unsafe.SizeOf<float>()];
                                Unsafe.CopyBlock(ref currentchanneldata[0], ref tempdata[i * col * bytecount], (uint)currentchanneldata.Length);
                                queue.Enqueue(currentchanneldata);
                                if (queue.Count > framecount) queue.Dequeue();
                                currentchanneldata = queue.SelectMany(x => x).ToArray();
                                thd = Tools.Tools.CalcTHD(ref Unsafe.As<byte, float>(ref currentchanneldata[0]), (uint)queue.Count *col);
                            }
                            else
                            {
                                if(queue.Count>0)
                                {
                                    queue.Clear();
                                }
                                thd = Tools.Tools.CalcTHD(ref Unsafe.As<byte, float>(ref tempdata[i * col * bytecount]), col);
                            }
                        }
                        else
                        {
                            if(queue.Count>0)
                            {
                                queue.Clear();
                            }
                            thd = Tools.Tools.CalcTHD(ref Unsafe.As<byte, float>(ref tempdata[i * col * bytecount]), col);
                        }
                    }
                    Models.StatisticsModel model = new Models.StatisticsModel()
                    {
                        Name = ShakerConfigViewModel.Instance.Model.AnalogSignalConfigs[i].Name,
                        Max = max,
                        Min = min,
                        RMS = Shaker.Models.Tools.Tools.Calc.Sum.Rms(ref Unsafe.As<byte,float>(ref tempdata[i*bytecount*col]), col),
                        Average = v/ col,
                        THD = thd,
                        Unit = ShakerConfigViewModel.Instance.Model.AnalogSignalConfigs[i].Unit,
                    };
                    if (AnalogDataCache.TryGetValue(ShakerConfigViewModel.Instance.Model.AnalogSignalConfigs[i].AnalogType,out var list))
                    {
                        if (list == null) list = new List<(List<DataPoint>, Models.StatisticsModel)>();
                        list.Add((dataPoints,model));
                    }
                    else
                    {
                        AnalogDataCache[ShakerConfigViewModel.Instance.Model.AnalogSignalConfigs[i].AnalogType] = new List<(List<DataPoint>, Models.StatisticsModel)> { (dataPoints,model) };
                    }
                    statistics.Add(model);
                }
            }
             GetEvent(Topic.DATA).Publish(this,null);
        }
        public static ShakerDataViewModel Instance { get; } = new ShakerDataViewModel();
    }
}