From 4c7fb8f45268c0123d0488dab23dff00c9578257 Mon Sep 17 00:00:00 2001
From: TelepathicWalrus <48514138+TelepathicWalrus@users.noreply.github.com>
Date: Fri, 18 Aug 2023 09:25:56 +0100
Subject: [PATCH] Album gain (#10085)

* Add LUFSAlbum DTO

* Get loudest track for smallest gain

* Move gain search to musicalbum
use baseitem LUFS for album

* Use .Max for enumerable

* Update DTO to be consistent with other DTOs

* Remove albumlufs,
Move dto for all types
---
 Emby.Server.Implementations/Dto/DtoService.cs        | 3 ++-
 MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Emby.Server.Implementations/Dto/DtoService.cs b/Emby.Server.Implementations/Dto/DtoService.cs
index 7a6ed2cb80..6d27703bdc 100644
--- a/Emby.Server.Implementations/Dto/DtoService.cs
+++ b/Emby.Server.Implementations/Dto/DtoService.cs
@@ -903,10 +903,11 @@ namespace Emby.Server.Implementations.Dto
                 dto.IsPlaceHolder = supportsPlaceHolders.IsPlaceHolder;
             }
 
+            dto.LUFS = item.LUFS;
+
             // Add audio info
             if (item is Audio audio)
             {
-                dto.LUFS = audio.LUFS;
                 dto.Album = audio.Album;
                 if (audio.ExtraType.HasValue)
                 {
diff --git a/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs b/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs
index 2dbd513a17..237345206f 100644
--- a/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs
+++ b/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs
@@ -183,6 +183,9 @@ namespace MediaBrowser.Controller.Entities.Audio
                 progress.Report(percent * 95);
             }
 
+            // get album LUFS
+            LUFS = items.OfType<Audio>().Max(item => item.LUFS);
+
             var parentRefreshOptions = refreshOptions;
             if (childUpdateType > ItemUpdateType.None)
             {