Use FrameStabilityClock to denote current position on song progress

osu.Game/Rulesets/UI/DrawableRuleset.cs

@@ -59,6 +59,8 @@ namespace osu.Game.Rulesets.UI
         /// </summary>
         public Container Overlays { get; private set; }
 
+        public override GameplayClock FrameStableClock => frameStabilityContainer.GameplayClock;
+
         /// <summary>
         /// Invoked when a <see cref="JudgementResult"/> has been applied by a <see cref="DrawableHitObject"/>.
         /// </summary>
@@ -334,6 +336,11 @@ namespace osu.Game.Rulesets.UI
         /// </summary>
         public readonly BindableBool IsPaused = new BindableBool();
 
+        /// <summary>
+        /// The frame-stable clock which is being used for playfield display.
+        /// </summary>
+        public abstract GameplayClock FrameStableClock { get; }
+
         /// <summary>~
         /// The associated ruleset.
         /// </summary>

osu.Game/Rulesets/UI/FrameStabilityContainer.cs

@@ -20,7 +20,8 @@ namespace osu.Game.Rulesets.UI
         public FrameStabilityContainer()
         {
             RelativeSizeAxes = Axes.Both;
-            gameplayClock = new GameplayClock(framedClock = new FramedClock(manualClock = new ManualClock()));
+
+            GameplayClock = new GameplayClock(framedClock = new FramedClock(manualClock = new ManualClock()));
         }
 
         private readonly ManualClock manualClock;
@@ -28,7 +29,7 @@ namespace osu.Game.Rulesets.UI
         private readonly FramedClock framedClock;
 
         [Cached]
-        private GameplayClock gameplayClock;
+        public GameplayClock GameplayClock { get; }
 
         private IFrameBasedClock parentGameplayClock;
 
@@ -38,7 +39,7 @@ namespace osu.Game.Rulesets.UI
             if (clock != null)
             {
                 parentGameplayClock = clock;
-                gameplayClock.IsPaused.BindTo(clock.IsPaused);
+                GameplayClock.IsPaused.BindTo(clock.IsPaused);
             }
         }
 
@@ -73,7 +74,7 @@ namespace osu.Game.Rulesets.UI
         public override bool UpdateSubTree()
         {
             requireMoreUpdateLoops = true;
-            validState = !gameplayClock.IsPaused.Value;
+            validState = !GameplayClock.IsPaused.Value;
 
             int loops = 0;
 
@@ -160,7 +161,7 @@ namespace osu.Game.Rulesets.UI
             if (parentGameplayClock == null)
                 parentGameplayClock = Clock;
 
-            Clock = gameplayClock;
+            Clock = GameplayClock;
             ProcessCustomClock = false;
         }
 

osu.Game/Screens/Play/HUDOverlay.cs

@@ -35,6 +35,10 @@ namespace osu.Game.Screens.Play
         public readonly HoldForMenuButton HoldToQuit;
         public readonly PlayerSettingsOverlay PlayerSettingsOverlay;
 
+        private readonly ScoreProcessor scoreProcessor;
+        private readonly DrawableRuleset drawableRuleset;
+        private readonly IReadOnlyList<Mod> mods;
+
         private Bindable<bool> showHud;
         private readonly Container visibilityContainer;
         private readonly BindableBool replayLoaded = new BindableBool();
@@ -45,6 +49,10 @@ namespace osu.Game.Screens.Play
 
         public HUDOverlay(ScoreProcessor scoreProcessor, DrawableRuleset drawableRuleset, IReadOnlyList<Mod> mods)
         {
+            this.scoreProcessor = scoreProcessor;
+            this.drawableRuleset = drawableRuleset;
+            this.mods = mods;
+
             RelativeSizeAxes = Axes.Both;
 
             Children = new Drawable[]
@@ -89,20 +97,21 @@ namespace osu.Game.Screens.Play
                     }
                 }
             };
+        }
 
+        [BackgroundDependencyLoader(true)]
+        private void load(OsuConfigManager config, NotificationOverlay notificationOverlay)
+        {
             BindProcessor(scoreProcessor);
             BindDrawableRuleset(drawableRuleset);
 
             Progress.Objects = drawableRuleset.Objects;
             Progress.AllowSeeking = drawableRuleset.HasReplayLoaded.Value;
             Progress.RequestSeek = time => RequestSeek(time);
+            Progress.ReferenceClock = drawableRuleset.FrameStableClock;
 
             ModDisplay.Current.Value = mods;
-        }
 
-        [BackgroundDependencyLoader(true)]
-        private void load(OsuConfigManager config, NotificationOverlay notificationOverlay)
-        {
             showHud = config.GetBindable<bool>(OsuSetting.ShowInterface);
             showHud.ValueChanged += visible => visibilityContainer.FadeTo(visible.NewValue ? 1 : 0, duration);
             showHud.TriggerChange();

osu.Game/Screens/Play/SongProgress.cs

@@ -10,6 +10,7 @@ using osu.Game.Graphics;
 using osu.Framework.Allocation;
 using System.Linq;
 using osu.Framework.Bindables;
+using osu.Framework.Timing;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.UI;
@@ -55,7 +56,9 @@ namespace osu.Game.Screens.Play
 
         private readonly BindableBool replayLoaded = new BindableBool();
 
-        private GameplayClock gameplayClock;
+        public IClock ReferenceClock;
+
+        private IClock gameplayClock;
 
         [BackgroundDependencyLoader(true)]
         private void load(OsuColour colours, GameplayClock clock)
@@ -154,10 +157,12 @@ namespace osu.Game.Screens.Play
             if (objects == null)
                 return;
 
-            double position = gameplayClock?.CurrentTime ?? Time.Current;
+            double gameplayTime = gameplayClock?.CurrentTime ?? Time.Current;
-            double progress = Math.Min(1, (position - firstHitTime) / (lastHitTime - firstHitTime));
+            double frameStableTime = ReferenceClock?.CurrentTime ?? gameplayTime;
 
-            bar.CurrentTime = position;
+            double progress = Math.Min(1, (frameStableTime - firstHitTime) / (lastHitTime - firstHitTime));
+
+            bar.CurrentTime = gameplayTime;
             graph.Progress = (int)(graph.ColumnCount * progress);
         }
     }