add subtitle language detection

Emby.Common.Implementations/TextEncoding/NLangDetect/ProbVector.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+
+namespace NLangDetect.Core
+{
+  public class ProbVector
+  {
+    private readonly Dictionary<int, double> _dict = new Dictionary<int, double>();
+
+    public double this[int key]
+    {
+      get
+      {
+        double value;
+
+        return _dict.TryGetValue(key, out value) ? value : 0.0;
+      }
+
+      set
+      {
+        if (Math.Abs(value) < double.Epsilon)
+        {
+          if (_dict.ContainsKey(key))
+          {
+            _dict.Remove(key);
+          }
+
+          return;
+        }
+
+        _dict[key] = value;
+      }
+    }
+  }
+}