[F] Sudden changes in headphone volume

AquaMai.Mods/Tweaks/TimeSaving/EntryToMusicSelection.cs

@@ -4,6 +4,7 @@
 using MAI2.Util;
 using Manager;
 using Monitor;
+using Monitor.ModeSelect;
 using Process;
 using Process.Information;
 
@@ -14,6 +15,12 @@ namespace AquaMai.Mods.Tweaks.TimeSaving;
     zh: "登录完成后直接进入选歌界面")]
 public class EntryToMusicSelection
 {
+    private static int[] _timers = new int[2];
+
+    private static CommonValue[] _volumeFadeIns = { new CommonValue(), new CommonValue() };
+
+    private static readonly bool[] _volumeFadeInState = new bool[2];
+
     /*
      * Highly experimental, may well break some stuff
      * Works by overriding the info screen (where it shows new events and stuff)
@@ -25,16 +32,6 @@ public class EntryToMusicSelection
     public static bool OnUpdate(InformationProcess __instance, ProcessDataContainer ___container)
     {
         GameManager.SetMaxTrack();
-        // Set headphone volume
-        for (var i = 0; i < 2; i++)
-        {
-            var userData = UserDataManager.Instance.GetUserData(i);
-            if (userData.IsEntry)
-            {
-                OptionHeadphonevolumeID headPhoneVolume = userData.Option.HeadPhoneVolume;
-                SoundManager.SetHeadPhoneVolume(i, headPhoneVolume.GetValue());
-            }
-        }
         ___container.processManager.AddProcess(new MusicSelectProcess(___container));
         ___container.processManager.ReleaseProcess(__instance);
         return false;
@@ -49,4 +46,63 @@ public static void MapResultMonitorPreInitialize(int monIndex)
         if (index >= 0) return;
         userData.MapList.Clear();
     }
+
+    // Gradually increase headphone volume
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(MusicSelectProcess), "OnUpdate")]
+    public static void MusicSelectProcessOnUpdate()
+    {
+        for (var i = 0; i < 2; i++)
+        {
+            if (_volumeFadeInState[i] && _timers[i] == 0) continue;
+
+            if (_timers[i] > 0)
+            {
+                _timers[i]--;
+            }
+
+            if (_volumeFadeInState[i])
+            {
+                if (_timers[i] == 0)
+                {
+                    SoundManager.SetHeadPhoneVolume(i, _volumeFadeIns[i].end);
+                }
+                else if (!_volumeFadeIns[i].UpdateValue())
+                {
+                    SoundManager.SetHeadPhoneVolume(i, _volumeFadeIns[i].current);
+                }
+            }
+            else
+            {
+                var userData = UserDataManager.Instance.GetUserData(i);
+                if (!userData.IsEntry) continue;
+                var value = userData.Option.HeadPhoneVolume.GetValue();
+                if (GameManager.IsSelectContinue[i])
+                {
+                    _volumeFadeIns[i].start = value;
+                    _volumeFadeIns[i].current = value;
+                }
+                else
+                {
+                    _volumeFadeIns[i].start = 0.05f;
+                    _volumeFadeIns[i].current = 0.05f;
+                }
+
+                _volumeFadeIns[i].end = value;
+                _volumeFadeIns[i].diff = (_volumeFadeIns[i].end - _volumeFadeIns[i].start) / 90f;
+                _timers[i] = 90;
+                _volumeFadeInState[i] = true;
+            }
+        }
+    }
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(GameOverProcess), "OnStart")]
+    public static void GameOverProcessOnStart()
+    {
+        for (var i = 0; i < 2; i++)
+        {
+            _volumeFadeInState[i] = false;
+        }
+    }
 }