2019-01-13 15:02:23 -05:00
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using System;
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2018-12-14 04:40:55 -05:00
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Text.RegularExpressions;
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using System.Threading;
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2019-01-13 14:26:04 -05:00
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using MediaBrowser.Model.Extensions;
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2018-12-14 04:40:55 -05:00
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using MediaBrowser.Model.MediaInfo;
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2019-01-13 14:26:04 -05:00
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using Microsoft.Extensions.Logging;
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2018-12-14 04:40:55 -05:00
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namespace MediaBrowser.MediaEncoding.Subtitles
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{
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public class SrtParser : ISubtitleParser
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{
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private readonly ILogger _logger;
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private readonly CultureInfo _usCulture = new CultureInfo("en-US");
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public SrtParser(ILogger logger)
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{
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_logger = logger;
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}
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public SubtitleTrackInfo Parse(Stream stream, CancellationToken cancellationToken)
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{
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var trackInfo = new SubtitleTrackInfo();
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var trackEvents = new List<SubtitleTrackEvent>();
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using (var reader = new StreamReader(stream))
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2018-12-14 04:40:55 -05:00
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{
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string line;
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while ((line = reader.ReadLine()) != null)
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{
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cancellationToken.ThrowIfCancellationRequested();
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if (string.IsNullOrWhiteSpace(line))
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{
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continue;
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}
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var subEvent = new SubtitleTrackEvent { Id = line };
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2018-12-14 04:40:55 -05:00
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line = reader.ReadLine();
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if (string.IsNullOrWhiteSpace(line))
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{
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continue;
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}
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2019-01-07 18:27:46 -05:00
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2018-12-14 04:40:55 -05:00
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var time = Regex.Split(line, @"[\t ]*-->[\t ]*");
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if (time.Length < 2)
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{
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// This occurs when subtitle text has an empty line as part of the text.
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// Need to adjust the break statement below to resolve this.
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_logger.LogWarning("Unrecognized line in srt: {0}", line);
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2018-12-14 04:40:55 -05:00
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continue;
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}
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subEvent.StartPositionTicks = GetTicks(time[0]);
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var endTime = time[1];
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var idx = endTime.IndexOf(" ", StringComparison.Ordinal);
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if (idx > 0)
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endTime = endTime.Substring(0, idx);
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subEvent.EndPositionTicks = GetTicks(endTime);
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var multiline = new List<string>();
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while ((line = reader.ReadLine()) != null)
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{
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if (string.IsNullOrEmpty(line))
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{
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break;
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}
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multiline.Add(line);
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}
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subEvent.Text = string.Join(ParserValues.NewLine, multiline);
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subEvent.Text = subEvent.Text.Replace(@"\N", ParserValues.NewLine, StringComparison.OrdinalIgnoreCase);
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subEvent.Text = Regex.Replace(subEvent.Text, @"\{(?:\\\d?[\w.-]+(?:\([^\)]*\)|&H?[0-9A-Fa-f]+&|))+\}", string.Empty, RegexOptions.IgnoreCase);
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subEvent.Text = Regex.Replace(subEvent.Text, "<", "<", RegexOptions.IgnoreCase);
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subEvent.Text = Regex.Replace(subEvent.Text, ">", ">", RegexOptions.IgnoreCase);
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subEvent.Text = Regex.Replace(subEvent.Text, "<(\\/?(font|b|u|i|s))((\\s+(\\w|\\w[\\w\\-]*\\w)(\\s*=\\s*(?:\\\".*?\\\"|'.*?'|[^'\\\">\\s]+))?)+\\s*|\\s*)(\\/?)>", "<$1$3$7>", RegexOptions.IgnoreCase);
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trackEvents.Add(subEvent);
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}
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}
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trackInfo.TrackEvents = trackEvents.ToArray();
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return trackInfo;
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}
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long GetTicks(string time)
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{
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TimeSpan span;
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return TimeSpan.TryParseExact(time, @"hh\:mm\:ss\.fff", _usCulture, out span)
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? span.Ticks
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: (TimeSpan.TryParseExact(time, @"hh\:mm\:ss\,fff", _usCulture, out span)
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? span.Ticks : 0);
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}
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}
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}
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