Backport pull request #11774 from jellyfin/release-10.9.z

Apply audio boost when downmixing regardless of downmixalgo

Original-merge: 06a5ddda5e6123dab6608f8907c8976a92e398e2

Merged-by: nielsvanvelzen <nielsvanvelzen@users.noreply.github.com>

Backported-by: Joshua M. Boniface <joshua@boniface.me>

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -2631,10 +2631,14 @@ namespace MediaBrowser.Controller.MediaEncoding
                 && state.AudioStream.Channels.HasValue
                 && state.AudioStream.Channels.Value == 6)
             {
+                if (!encodingOptions.DownMixAudioBoost.Equals(1))
+                {
+                    filters.Add("volume=" + encodingOptions.DownMixAudioBoost.ToString(CultureInfo.InvariantCulture));
+                }
+
                 switch (encodingOptions.DownMixStereoAlgorithm)
                 {
                     case DownMixStereoAlgorithms.Dave750:
-                        filters.Add("volume=4.25");
                         filters.Add("pan=stereo|c0=0.5*c2+0.707*c0+0.707*c4+0.5*c3|c1=0.5*c2+0.707*c1+0.707*c5+0.5*c3");
                         break;
                     case DownMixStereoAlgorithms.NightmodeDialogue:
@@ -2642,11 +2646,6 @@ namespace MediaBrowser.Controller.MediaEncoding
                         break;
                     case DownMixStereoAlgorithms.None:
                     default:
-                        if (!encodingOptions.DownMixAudioBoost.Equals(1))
-                        {
-                            filters.Add("volume=" + encodingOptions.DownMixAudioBoost.ToString(CultureInfo.InvariantCulture));
-                        }
-
                         break;
                 }
             }