Add GPL modules

MediaBrowser.Controller/MediaEncoding/ISubtitleEncoder.cs

@@ -0,0 +1,33 @@
+using MediaBrowser.Model.MediaInfo;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Entities;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    public interface ISubtitleEncoder
+    {
+        /// <summary>
+        /// Gets the subtitles.
+        /// </summary>
+        /// <returns>Task{Stream}.</returns>
+        Task<Stream> GetSubtitles(BaseItem item,
+            string mediaSourceId,
+            int subtitleStreamIndex,
+            string outputFormat,
+            long startTimeTicks,
+            long endTimeTicks,
+            bool preserveOriginalTimestamps,
+            CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Gets the subtitle language encoding parameter.
+        /// </summary>
+        /// <param name="path">The path.</param>
+        /// <param name="protocol">The protocol.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>System.String.</returns>
+        Task<string> GetSubtitleFileCharacterSet(string path, string language, MediaProtocol protocol, CancellationToken cancellationToken);
+    }
+}