Add IAudioService

Author: saddam213

TensorStack.Audio/AudioInput.cs renamed to TensorStack.Audio/AudioInputBase.cs

@@ -0,0 +1,11 @@
+// Copyright (c) TensorStack. All rights reserved.
+// Licensed under the Apache 2.0 License.
+using System.Threading.Tasks;
+
+namespace TensorStack.Audio
+{
+    public interface IAudioService
+    {
+        Task<AudioInfo> GetAudioInfoAsync(string filename);
+    }
+}