Mp3读取，Effect Remove

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

Assets/NLayer/Decoder/VBRInfo.cs

@@ -0,0 +1,32 @@
+namespace NLayer.Decoder
+{
+    class VBRInfo
+    {
+        internal VBRInfo() { }
+
+        internal int SampleCount { get; set; }
+        internal int SampleRate { get; set; }
+        internal int Channels { get; set; }
+        internal int VBRFrames { get; set; }
+        internal int VBRBytes { get; set; }
+        internal int VBRQuality { get; set; }
+        internal int VBRDelay { get; set; }
+
+        internal long VBRStreamSampleCount
+        {
+            get
+            {
+                // we assume the entire stream is consistent wrt samples per frame
+                return VBRFrames * SampleCount;
+            }
+        }
+
+        internal int VBRAverageBitrate
+        {
+            get
+            {
+                return (int)((VBRBytes / (VBRStreamSampleCount / (double)SampleRate)) * 8);
+            }
+        }
+    }
+}