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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Jellyfin.Extensions;
using LrcParser.Model;
using LrcParser.Parser;
using MediaBrowser.Controller.Lyrics;
using MediaBrowser.Controller.Resolvers;
using MediaBrowser.Model.Lyrics;
namespace MediaBrowser.Providers.Lyric;
/// <summary>
/// LRC Lyric Parser.
/// </summary>
public class LrcLyricParser : ILyricParser
{
private readonly LyricParser _lrcLyricParser;
private static readonly string[] _supportedMediaTypes = [".lrc", ".elrc"];
/// <summary>
/// Initializes a new instance of the <see cref="LrcLyricParser"/> class.
/// </summary>
public LrcLyricParser()
{
_lrcLyricParser = new LrcParser.Parser.Lrc.LrcParser();
}
/// <inheritdoc />
public string Name => "LrcLyricProvider";
/// <summary>
/// Gets the priority.
/// </summary>
/// <value>The priority.</value>
public ResolverPriority Priority => ResolverPriority.Fourth;
/// <inheritdoc />
public LyricDto? ParseLyrics(LyricFile lyrics)
{
if (!_supportedMediaTypes.Contains(Path.GetExtension(lyrics.Name.AsSpan()), StringComparison.OrdinalIgnoreCase))
{
return null;
}
Song lyricData;
try
{
lyricData = _lrcLyricParser.Decode(lyrics.Content);
}
catch (Exception)
{
// Failed to parse, return null so the next parser will be tried
return null;
}
List<LrcParser.Model.Lyric> sortedLyricData = lyricData.Lyrics.OrderBy(x => x.StartTime).ToList();
if (sortedLyricData.Count == 0)
{
return null;
}
List<LyricLine> lyricList = [];
for (int i = 0; i < sortedLyricData.Count; i++)
{
long ticks = TimeSpan.FromMilliseconds(sortedLyricData[i].StartTime).Ticks;
lyricList.Add(new LyricLine(sortedLyricData[i].Text.Trim(), ticks));
}
return new LyricDto { Lyrics = lyricList };
}
}
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