Use enums for encoding options (#12561)

MediaBrowser.Model/Entities/TonemappingAlgorithm.cs

@@ -0,0 +1,49 @@
+#pragma warning disable SA1300 // Lowercase required for backwards compat.
+
+namespace MediaBrowser.Model.Entities;
+
+/// <summary>
+/// Enum containing tonemapping algorithms.
+/// </summary>
+public enum TonemappingAlgorithm
+{
+    /// <summary>
+    /// None.
+    /// </summary>
+    none = 0,
+
+    /// <summary>
+    /// Clip.
+    /// </summary>
+    clip = 1,
+
+    /// <summary>
+    /// Linear.
+    /// </summary>
+    linear = 2,
+
+    /// <summary>
+    /// Gamma.
+    /// </summary>
+    gamma = 3,
+
+    /// <summary>
+    /// Reinhard.
+    /// </summary>
+    reinhard = 4,
+
+    /// <summary>
+    /// Hable.
+    /// </summary>
+    hable = 5,
+
+    /// <summary>
+    /// Mobius.
+    /// </summary>
+    mobius = 6,
+
+    /// <summary>
+    /// BT2390.
+    /// </summary>
+    bt2390 = 7
+}