added encoding manager interface

MediaBrowser.Controller/MediaEncoding/IEncodingManager.cs

@@ -0,0 +1,33 @@
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    public interface IEncodingManager
+    {
+        /// <summary>
+        /// Gets the subtitle cache path.
+        /// </summary>
+        /// <param name="originalSubtitlePath">The original subtitle path.</param>
+        /// <param name="outputSubtitleExtension">The output subtitle extension.</param>
+        /// <returns>System.String.</returns>
+        string GetSubtitleCachePath(string originalSubtitlePath, string outputSubtitleExtension);
+
+        /// <summary>
+        /// Gets the subtitle cache path.
+        /// </summary>
+        /// <param name="mediaPath">The media path.</param>
+        /// <param name="subtitleStreamIndex">Index of the subtitle stream.</param>
+        /// <param name="outputSubtitleExtension">The output subtitle extension.</param>
+        /// <returns>System.String.</returns>
+        string GetSubtitleCachePath(string mediaPath, int subtitleStreamIndex, string outputSubtitleExtension);
+
+        /// <summary>
+        /// Refreshes the chapter images.
+        /// </summary>
+        /// <param name="options">The options.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task{System.Boolean}.</returns>
+        Task<bool> RefreshChapterImages(ChapterImageRefreshOptions options, CancellationToken cancellationToken);
+    }
+}