1 files changed, 92 insertions, 0 deletions
diff --git a/MediaBrowser.MediaEncoding/Subtitles/SrtParser.cs b/MediaBrowser.MediaEncoding/Subtitles/SrtParser.cs
new file mode 100644
index 000000000..de6d7bc72
--- /dev/null
+++ b/MediaBrowser.MediaEncoding/Subtitles/SrtParser.cs
@@ -0,0 +1,92 @@
+using MediaBrowser.Model.Extensions;
+using MediaBrowser.Model.Logging;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Text.RegularExpressions;
+using System.Threading;
+using MediaBrowser.Model.MediaInfo;
+
+namespace MediaBrowser.MediaEncoding.Subtitles
+{
+    public class SrtParser : ISubtitleParser
+    {
+        private readonly ILogger _logger;
+
+        private readonly CultureInfo _usCulture = new CultureInfo("en-US");
+
+        public SrtParser(ILogger logger)
+        {
+            _logger = logger;
+        }
+
+        public SubtitleTrackInfo Parse(Stream stream, CancellationToken cancellationToken)
+        {
+            var trackInfo = new SubtitleTrackInfo();
+            List<SubtitleTrackEvent> trackEvents = new List<SubtitleTrackEvent>();
+            using ( var reader = new StreamReader(stream))
+            {
+                string line;
+                while ((line = reader.ReadLine()) != null)
+                {
+                    cancellationToken.ThrowIfCancellationRequested();
+
+                    if (string.IsNullOrWhiteSpace(line))
+                    {
+                        continue;
+                    }
+                    var subEvent = new SubtitleTrackEvent {Id = line};
+                    line = reader.ReadLine();
+
+                    if (string.IsNullOrWhiteSpace(line))
+                    {
+                        continue;
+                    }
+                    
+                    var time = Regex.Split(line, @"[\t ]*-->[\t ]*");
+
+                    if (time.Length < 2)
+                    {
+                        // This occurs when subtitle text has an empty line as part of the text.
+                        // Need to adjust the break statement below to resolve this.
+                        _logger.Warn("Unrecognized line in srt: {0}", line);
+                        continue;
+                    }
+                    subEvent.StartPositionTicks = GetTicks(time[0]);
+                    var endTime = time[1];
+                    var idx = endTime.IndexOf(" ", StringComparison.Ordinal);
+                    if (idx > 0)
+                        endTime = endTime.Substring(0, idx);
+                    subEvent.EndPositionTicks = GetTicks(endTime);
+                    var multiline = new List<string>();
+                    while ((line = reader.ReadLine()) != null)
+                    {
+                        if (string.IsNullOrEmpty(line))
+                        {
+                            break;
+                        }
+                        multiline.Add(line);
+                    }
+                    subEvent.Text = string.Join(ParserValues.NewLine, multiline);
+                    subEvent.Text = subEvent.Text.Replace(@"\N", ParserValues.NewLine, StringComparison.OrdinalIgnoreCase);
+                    subEvent.Text = Regex.Replace(subEvent.Text, @"\{(?:\\\d?[\w.-]+(?:\([^\)]*\)|&H?[0-9A-Fa-f]+&|))+\}", string.Empty, RegexOptions.IgnoreCase);
+                    subEvent.Text = Regex.Replace(subEvent.Text, "<", "&lt;", RegexOptions.IgnoreCase);
+                    subEvent.Text = Regex.Replace(subEvent.Text, ">", "&gt;", RegexOptions.IgnoreCase);
+                    subEvent.Text = Regex.Replace(subEvent.Text, "&lt;(\\/?(font|b|u|i|s))((\\s+(\\w|\\w[\\w\\-]*\\w)(\\s*=\\s*(?:\\\".*?\\\"|'.*?'|[^'\\\">\\s]+))?)+\\s*|\\s*)(\\/?)&gt;", "<$1$3$7>", RegexOptions.IgnoreCase);
+                    trackEvents.Add(subEvent);
+                }
+            }
+            trackInfo.TrackEvents = trackEvents.ToArray();
+            return trackInfo;
+        }
+
+        long GetTicks(string time) {
+            TimeSpan span;
+            return TimeSpan.TryParseExact(time, @"hh\:mm\:ss\.fff", _usCulture, out span)
+                ? span.Ticks
+                : (TimeSpan.TryParseExact(time, @"hh\:mm\:ss\,fff", _usCulture, out span) 
+                ? span.Ticks : 0);
+        }
+    }
+}