Mp3读取，Effect Remove

Signed-off-by: TRAfoer <lhf190@outlook.com>

Assets/NLayer/Enums.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace NLayer
+{
+    public enum MpegVersion
+    {
+        Unknown = 0,
+        Version1 = 10,
+        Version2 = 20,
+        Version25 = 25,
+    }
+
+    public enum MpegLayer
+    {
+        Unknown = 0,
+        LayerI = 1,
+        LayerII = 2,
+        LayerIII = 3,
+    }
+
+    public enum MpegChannelMode
+    {
+        Stereo,
+        JointStereo,
+        DualChannel,
+        Mono,
+    }
+
+    public enum StereoMode
+    {
+        Both,
+        LeftOnly,
+        RightOnly,
+        DownmixToMono,
+    }
+}