1 files changed, 64 insertions, 3 deletions

diff --git a/MediaBrowser.Providers/MediaInfo/AudioFileProber.cs b/MediaBrowser.Providers/MediaInfo/AudioFileProber.cs
index 19b594c1c..e1dcbc993 100644
--- a/MediaBrowser.Providers/MediaInfo/AudioFileProber.cs
+++ b/MediaBrowser.Providers/MediaInfo/AudioFileProber.cs
@@ -1,8 +1,12 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
+using System.Globalization;
 using System.Linq;
+using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
@@ -13,6 +17,7 @@ using MediaBrowser.Model.Dlna;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.MediaInfo;
+using Microsoft.Extensions.Logging;
 using TagLib;
 
 namespace MediaBrowser.Providers.MediaInfo
@@ -22,6 +27,10 @@ namespace MediaBrowser.Providers.MediaInfo
     /// </summary>
     public class AudioFileProber
     {
+        // Default LUFS value for use with the web interface, at -18db gain will be 1(no db gain).
+        private const float DefaultLUFSValue = -18;
+
+        private readonly ILogger<AudioFileProber> _logger;
         private readonly IMediaEncoder _mediaEncoder;
         private readonly IItemRepository _itemRepo;
         private readonly ILibraryManager _libraryManager;
@@ -30,16 +39,19 @@ namespace MediaBrowser.Providers.MediaInfo
         /// <summary>
         /// Initializes a new instance of the <see cref="AudioFileProber"/> class.
         /// </summary>
+        /// <param name="logger">Instance of the <see cref="ILogger"/> interface.</param>
         /// <param name="mediaSourceManager">Instance of the <see cref="IMediaSourceManager"/> interface.</param>
         /// <param name="mediaEncoder">Instance of the <see cref="IMediaEncoder"/> interface.</param>
         /// <param name="itemRepo">Instance of the <see cref="IItemRepository"/> interface.</param>
         /// <param name="libraryManager">Instance of the <see cref="ILibraryManager"/> interface.</param>
         public AudioFileProber(
+            ILogger<AudioFileProber> logger,
             IMediaSourceManager mediaSourceManager,
             IMediaEncoder mediaEncoder,
             IItemRepository itemRepo,
             ILibraryManager libraryManager)
         {
+            _logger = logger;
             _mediaEncoder = mediaEncoder;
             _itemRepo = itemRepo;
             _libraryManager = libraryManager;
@@ -88,6 +100,54 @@ namespace MediaBrowser.Providers.MediaInfo
                 Fetch(item, result, cancellationToken);
             }
 
+            var libraryOptions = _libraryManager.GetLibraryOptions(item);
+
+            if (libraryOptions.EnableLUFSScan)
+            {
+                string output;
+                using (var process = new Process()
+                {
+                    StartInfo = new ProcessStartInfo
+                    {
+                        FileName = _mediaEncoder.EncoderPath,
+                        Arguments = $"-hide_banner -i \"{path}\" -af ebur128=framelog=verbose -f null -",
+                        RedirectStandardOutput = false,
+                        RedirectStandardError = true
+                    },
+                })
+                {
+                    try
+                    {
+                        process.Start();
+                    }
+                    catch (Exception ex)
+                    {
+                        _logger.LogError(ex, "Error starting ffmpeg");
+
+                        throw;
+                    }
+
+                    output = await process.StandardError.ReadToEndAsync(cancellationToken).ConfigureAwait(false);
+                    cancellationToken.ThrowIfCancellationRequested();
+                    MatchCollection split = Regex.Matches(output, @"I:\s+(.*?)\s+LUFS");
+
+                    if (split.Count != 0)
+                    {
+                        item.LUFS = float.Parse(split[0].Groups[1].ValueSpan, CultureInfo.InvariantCulture.NumberFormat);
+                    }
+                    else
+                    {
+                        item.LUFS = DefaultLUFSValue;
+                    }
+                }
+            }
+            else
+            {
+                item.LUFS = DefaultLUFSValue;
+            }
+
+            _logger.LogDebug("LUFS for {ItemName} is {LUFS}.", item.Name, item.LUFS);
+
             return ItemUpdateType.MetadataImport;
         }
 
@@ -163,7 +223,7 @@ namespace MediaBrowser.Providers.MediaInfo
                         PeopleHelper.AddPerson(people, new PersonInfo
                         {
                             Name = albumArtist,
-                            Type = "AlbumArtist"
+                            Type = PersonKind.AlbumArtist
                         });
                     }
 
@@ -173,7 +233,7 @@ namespace MediaBrowser.Providers.MediaInfo
                         PeopleHelper.AddPerson(people, new PersonInfo
                         {
                             Name = performer,
-                            Type = "Artist"
+                            Type = PersonKind.Artist
                         });
                     }
 
@@ -182,7 +242,7 @@ namespace MediaBrowser.Providers.MediaInfo
                         PeopleHelper.AddPerson(people, new PersonInfo
                         {
                             Name = composer,
-                            Type = "Composer"
+                            Type = PersonKind.Composer
                         });
                     }
 
@@ -195,6 +255,7 @@ namespace MediaBrowser.Providers.MediaInfo
                 audio.Album = tags.Album;
                 audio.IndexNumber = Convert.ToInt32(tags.Track);
                 audio.ParentIndexNumber = Convert.ToInt32(tags.Disc);
+
                 if (tags.Year != 0)
                 {
                     var year = Convert.ToInt32(tags.Year);