From de09fd4d363f0aee447ac1815a801b65adf9e8c5 Mon Sep 17 00:00:00 2001
From: Telepathic Walrus <tom19978@googlemail.com>
Date: Mon, 30 Jan 2023 20:36:11 +0000
Subject: [PATCH] Add option to enable/disable normalization

---
 .../playbackSettings/playbackSettings.js          |  3 +++
 .../playbackSettings.template.html                | 10 +++++++++-
 src/plugins/htmlAudioPlayer/plugin.js             | 15 ++++++++++-----
 src/scripts/settings/userSettings.js              | 14 ++++++++++++++
 src/strings/en-us.json                            |  2 ++
 5 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/src/components/playbackSettings/playbackSettings.js b/src/components/playbackSettings/playbackSettings.js
index 1969d478c1..9f69acb797 100644
--- a/src/components/playbackSettings/playbackSettings.js
+++ b/src/components/playbackSettings/playbackSettings.js
@@ -185,6 +185,7 @@ import template from './playbackSettings.template.html';
         context.querySelector('.chkPlayDefaultAudioTrack').checked = user.Configuration.PlayDefaultAudioTrack || false;
         context.querySelector('.chkPreferFmp4HlsContainer').checked = userSettings.preferFmp4HlsContainer();
         context.querySelector('.chkEnableCinemaMode').checked = userSettings.enableCinemaMode();
+        context.querySelector('.chkEnableAudioNormalization').checked = userSettings.enableAudioNormalization();
         context.querySelector('.chkEnableNextVideoOverlay').checked = userSettings.enableNextVideoInfoOverlay();
         context.querySelector('.chkRememberAudioSelections').checked = user.Configuration.RememberAudioSelections || false;
         context.querySelector('.chkRememberSubtitleSelections').checked = user.Configuration.RememberSubtitleSelections || false;
@@ -231,6 +232,8 @@ import template from './playbackSettings.template.html';
         user.Configuration.EnableNextEpisodeAutoPlay = context.querySelector('.chkEpisodeAutoPlay').checked;
         userSettingsInstance.preferFmp4HlsContainer(context.querySelector('.chkPreferFmp4HlsContainer').checked);
         userSettingsInstance.enableCinemaMode(context.querySelector('.chkEnableCinemaMode').checked);
+        userSettingsInstance.enableAudioNormalization(context.querySelector('.chkEnableAudioNormalization').checked);
+        
 
         userSettingsInstance.enableNextVideoInfoOverlay(context.querySelector('.chkEnableNextVideoOverlay').checked);
         user.Configuration.RememberAudioSelections = context.querySelector('.chkRememberAudioSelections').checked;
diff --git a/src/components/playbackSettings/playbackSettings.template.html b/src/components/playbackSettings/playbackSettings.template.html
index 82c7483b9b..ba1c999b38 100644
--- a/src/components/playbackSettings/playbackSettings.template.html
+++ b/src/components/playbackSettings/playbackSettings.template.html
@@ -64,6 +64,14 @@
             <div class="selectContainer">
                 <select is="emby-select" class="selectMusicInternetQuality" label="${LabelInternetQuality}"></select>
             </div>
+
+            <div class="checkboxContainer checkboxContainer-withDescription">
+                <label>
+                    <input type="checkbox" is="emby-checkbox" class="chkEnableAudioNormalization" />
+                    <span>${EnableAudioNormalization}</span>
+                </label>
+                <div class="fieldDescription checkboxFieldDescription">${EnableAudioNormalizationHelp}</div>
+            </div>
         </div>
     </div>
 
@@ -102,7 +110,7 @@
             </label>
             <div class="fieldDescription checkboxFieldDescription">${RememberAudioSelectionsHelp}</div>
         </div>
-        
+
         <div class="checkboxContainer checkboxContainer-withDescription">
             <label>
                 <input type="checkbox" is="emby-checkbox" class="chkRememberSubtitleSelections" />
diff --git a/src/plugins/htmlAudioPlayer/plugin.js b/src/plugins/htmlAudioPlayer/plugin.js
index 45142b8735..f9f03a36ee 100644
--- a/src/plugins/htmlAudioPlayer/plugin.js
+++ b/src/plugins/htmlAudioPlayer/plugin.js
@@ -4,6 +4,7 @@ import * as htmlMediaHelper from '../../components/htmlMediaHelper';
 import profileBuilder from '../../scripts/browserDeviceProfile';
 import { getIncludeCorsCredentials } from '../../scripts/settings/webSettings';
 import Events from '../../utils/events.ts';
+import { UserSettings } from '../../scripts/settings/userSettings';
 
 function getDefaultProfile() {
     return profileBuilder({});
@@ -107,11 +108,15 @@ class HtmlAudioPlayer {
 
             let val = options.url;
             console.debug('playing url: ' + val);
-
-            const dbGain = -18 - options.item.Normalization;
-            console.debug(options.item);
-            self.gainNode.gain.value = Math.pow(10, (dbGain/20));
-
+            import('../../scripts/settings/userSettings').then((userSettings)=> {
+                if(userSettings.enableAudioNormalization()){
+                    const dbGain = -18 - options.item.Normalization;
+                    console.debug(options.item);
+                    self.gainNode.gain.value = Math.pow(10, (dbGain/20));
+                } else {
+                    self.gainNode.gain.value = 1;
+                }
+            });
 
             console.debug('gain:' + self.gainNode.gain.value);
 
diff --git a/src/scripts/settings/userSettings.js b/src/scripts/settings/userSettings.js
index d670bb0102..adce42dfbb 100644
--- a/src/scripts/settings/userSettings.js
+++ b/src/scripts/settings/userSettings.js
@@ -156,6 +156,19 @@ export class UserSettings {
         return toBoolean(this.get('enableCinemaMode', false), true);
     }
 
+    /**
+     * Get or set 'Enable Audio Normalization' state.
+     * @param {boolean|undefined} val - Flag to enable 'Enable Audio Normalization' or undefined.
+     * @return {boolean} 'Enable Audio Normalization' state.
+     */
+    enableAudioNormalization(val) {
+            if (val !== undefined) {
+                return this.set('enableAudioNormalization', val.toString(), false);
+            }
+
+            return toBoolean(this.get('enableAudioNormalization', false), true);
+        }
+
     /**
      * Get or set 'Next Video Info Overlay' state.
      * @param {boolean|undefined} val - Flag to enable 'Next Video Info Overlay' or undefined.
@@ -579,6 +592,7 @@ export const serverConfig = currentSettings.serverConfig.bind(currentSettings);
 export const allowedAudioChannels = currentSettings.allowedAudioChannels.bind(currentSettings);
 export const preferFmp4HlsContainer = currentSettings.preferFmp4HlsContainer.bind(currentSettings);
 export const enableCinemaMode = currentSettings.enableCinemaMode.bind(currentSettings);
+export const enableAudioNormalization = currentSettings.enableAudioNormalization.bind(currentSettings);
 export const enableNextVideoInfoOverlay = currentSettings.enableNextVideoInfoOverlay.bind(currentSettings);
 export const enableThemeSongs = currentSettings.enableThemeSongs.bind(currentSettings);
 export const enableThemeVideos = currentSettings.enableThemeVideos.bind(currentSettings);
diff --git a/src/strings/en-us.json b/src/strings/en-us.json
index 7a2bd21686..f75bc04d44 100644
--- a/src/strings/en-us.json
+++ b/src/strings/en-us.json
@@ -132,6 +132,7 @@
     "ChannelNumber": "Channel number",
     "Channels": "Channels",
     "CinemaModeConfigurationHelp": "Cinema mode brings the theater experience straight to your living room with the ability to play trailers and custom intros before the main feature.",
+    "EnableAudioNormalizationHelp": "Audio normalization will add a constant gain to keep the average at a desired level(-18db). ",
     "ClearQueue": "Clear queue",
     "ClientSettings": "Client Settings",
     "Collections": "Collections",
@@ -222,6 +223,7 @@
     "EnableBlurHash": "Enable blurred placeholders for images",
     "EnableBlurHashHelp": "Images that are still being loaded will be displayed with a unique placeholder.",
     "EnableCinemaMode": "Cinema mode",
+    "EnableAudioNormalization": "Audio Normalization",
     "EnableColorCodedBackgrounds": "Color coded backgrounds",
     "EnableDecodingColorDepth10Hevc": "Enable 10-bit hardware decoding for HEVC",
     "EnableDecodingColorDepth10Vp9": "Enable 10-bit hardware decoding for VP9",