using System.IO; using System.Text; using System.Text.RegularExpressions; using System.Threading; using MediaBrowser.Model.MediaInfo; namespace MediaBrowser.MediaEncoding.Subtitles { /// <summary> /// TTML subtitle writer. /// </summary> public partial class TtmlWriter : ISubtitleWriter { [GeneratedRegex(@"\\n", RegexOptions.IgnoreCase)] private static partial Regex NewLineEscapeRegex(); /// <inheritdoc /> public void Write(SubtitleTrackInfo info, Stream stream, CancellationToken cancellationToken) { // Example: https://github.com/zmalltalker/ttml2vtt/blob/master/data/sample.xml // Parser example: https://github.com/mozilla/popcorn-js/blob/master/parsers/parserTTML/popcorn.parserTTML.js using (var writer = new StreamWriter(stream, Encoding.UTF8, 1024, true)) { writer.WriteLine("<?xml version=\"1.0\" encoding=\"utf-8\"?>"); writer.WriteLine("<tt xmlns=\"http://www.w3.org/ns/ttml\" xmlns:tts=\"http://www.w3.org/2006/04/ttaf1#styling\" lang=\"no\">"); writer.WriteLine("<head>"); writer.WriteLine("<styling>"); writer.WriteLine("<style id=\"italic\" tts:fontStyle=\"italic\" />"); writer.WriteLine("<style id=\"left\" tts:textAlign=\"left\" />"); writer.WriteLine("<style id=\"center\" tts:textAlign=\"center\" />"); writer.WriteLine("<style id=\"right\" tts:textAlign=\"right\" />"); writer.WriteLine("</styling>"); writer.WriteLine("</head>"); writer.WriteLine("<body>"); writer.WriteLine("<div>"); foreach (var trackEvent in info.TrackEvents) { var text = trackEvent.Text; text = NewLineEscapeRegex().Replace(text, "<br/>"); writer.WriteLine( "<p begin=\"{0}\" dur=\"{1}\">{2}</p>", trackEvent.StartPositionTicks, trackEvent.EndPositionTicks - trackEvent.StartPositionTicks, text); } writer.WriteLine("</div>"); writer.WriteLine("</body>"); writer.WriteLine("</tt>"); } } } }