Port MediaEncoding and Api.Playback from 10e57ce8d21b4516733894075001819f3cd6db6b

MediaBrowser.MediaEncoding/Subtitles/VttWriter.cs

@@ -0,0 +1,44 @@
+using System;
+using System.IO;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading;
+using MediaBrowser.Model.MediaInfo;
+
+namespace MediaBrowser.MediaEncoding.Subtitles
+{
+    public class VttWriter : ISubtitleWriter
+    {
+        public void Write(SubtitleTrackInfo info, Stream stream, CancellationToken cancellationToken)
+        {
+            using (var writer = new StreamWriter(stream, Encoding.UTF8, 1024, true))
+            {
+                writer.WriteLine("WEBVTT");
+                writer.WriteLine(string.Empty);
+                foreach (var trackEvent in info.TrackEvents)
+                {
+                    cancellationToken.ThrowIfCancellationRequested();
+
+                    TimeSpan startTime = TimeSpan.FromTicks(trackEvent.StartPositionTicks);
+                    TimeSpan endTime = TimeSpan.FromTicks(trackEvent.EndPositionTicks);
+
+                    // make sure the start and end times are different and seqential
+                    if (endTime.TotalMilliseconds <= startTime.TotalMilliseconds)
+                    {
+                        endTime = startTime.Add(TimeSpan.FromMilliseconds(1));
+                    }
+
+                    writer.WriteLine(@"{0:hh\:mm\:ss\.fff} --> {1:hh\:mm\:ss\.fff}", startTime, endTime);
+
+                    var text = trackEvent.Text;
+
+                    // TODO: Not sure how to handle these
+                    text = Regex.Replace(text, @"\\n", " ", RegexOptions.IgnoreCase);
+
+                    writer.WriteLine(text);
+                    writer.WriteLine(string.Empty);
+                }
+            }
+        }
+    }
+}