Use enums for encoding options (#12561)

MediaBrowser.Model/Entities/TonemappingRange.cs

@@ -0,0 +1,24 @@
+#pragma warning disable SA1300 // Lowercase required for backwards compat.
+
+namespace MediaBrowser.Model.Entities;
+
+/// <summary>
+/// Enum containing tonemapping ranges.
+/// </summary>
+public enum TonemappingRange
+{
+    /// <summary>
+    /// Auto.
+    /// </summary>
+    auto = 0,
+
+    /// <summary>
+    /// TV.
+    /// </summary>
+    tv = 1,
+
+    /// <summary>
+    /// PC.
+    /// </summary>
+    pc = 2
+}