Add osu!taiko `Constant Speed` mod

osu.Game.Rulesets.Taiko/Mods/TaikoModConstantSpeed.cs

@@ -0,0 +1,31 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Localisation;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Taiko.Beatmaps;
+
+namespace osu.Game.Rulesets.Taiko.Mods
+{
+    public class TaikoModConstantSpeed : Mod, IApplicableToBeatmap
+    {
+        public override string Name => "Constant Speed";
+        public override string Acronym => "CS";
+        public override double ScoreMultiplier => 0.8;
+        public override LocalisableString Description => "No more tricky speed changes!";
+        public override IconUsage? Icon => FontAwesome.Solid.Equals;
+        public override ModType Type => ModType.Conversion;
+
+        public void ApplyToBeatmap(IBeatmap beatmap)
+        {
+            var taikoBeatmap = (TaikoBeatmap)beatmap;
+
+            foreach (var effectControlPoint in taikoBeatmap.ControlPointInfo.EffectPoints)
+            {
+                effectControlPoint.ScrollSpeed = 1;
+            }
+        }
+    }
+}

osu.Game.Rulesets.Taiko/TaikoRuleset.cs

@@ -150,6 +150,7 @@ public override IEnumerable<Mod> GetModsFor(ModType type)
                         new TaikoModClassic(),
                         new TaikoModSwap(),
                         new TaikoModSingleTap(),
+                        new TaikoModConstantSpeed(),
                     };
 
                 case ModType.Automation: