Merge pull request #6632 from peppy/bindable-control-points

Bindable control points

osu.Game.Rulesets.Catch.Tests/TestSceneDrawableHitObjects.cs

@@ -38,7 +38,7 @@ namespace osu.Game.Rulesets.Catch.Tests
         private void load()
         {
             var controlPointInfo = new ControlPointInfo();
-            controlPointInfo.TimingPoints.Add(new TimingControlPoint());
+            controlPointInfo.Add(0, new TimingControlPoint());
 
             WorkingBeatmap beatmap = CreateWorkingBeatmap(new Beatmap
             {

osu.Game.Rulesets.Osu.Tests/TestSceneOsuDistanceSnapGrid.cs

@@ -64,9 +64,8 @@ namespace osu.Game.Rulesets.Osu.Tests
         public void Setup() => Schedule(() =>
         {
             editorBeatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier = 1;
-            editorBeatmap.ControlPointInfo.DifficultyPoints.Clear();
+            editorBeatmap.ControlPointInfo.Clear();
-            editorBeatmap.ControlPointInfo.TimingPoints.Clear();
+            editorBeatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = beat_length });
-            editorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = beat_length });
         });
 
         [TestCase(1)]

osu.Game.Rulesets.Osu.Tests/TestSceneSlider.cs

@@ -308,7 +308,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         private Drawable createDrawable(Slider slider, float circleSize, double speedMultiplier)
         {
             var cpi = new ControlPointInfo();
-            cpi.DifficultyPoints.Add(new DifficultyControlPoint { SpeedMultiplier = speedMultiplier });
+            cpi.Add(0, new DifficultyControlPoint { SpeedMultiplier = speedMultiplier });
 
             slider.ApplyDefaults(cpi, new BeatmapDifficulty { CircleSize = circleSize, SliderTickRate = 3 });
 

osu.Game.Rulesets.Osu.Tests/TestSceneSliderInput.cs

@@ -313,10 +313,6 @@ namespace osu.Game.Rulesets.Osu.Tests
                             }, 25),
                         }
                     },
-                    ControlPointInfo =
-                    {
-                        DifficultyPoints = { new DifficultyControlPoint { SpeedMultiplier = 0.1f } }
-                    },
                     BeatmapInfo =
                     {
                         BaseDifficulty = new BeatmapDifficulty { SliderTickRate = 3 },
@@ -324,6 +320,8 @@ namespace osu.Game.Rulesets.Osu.Tests
                     },
                 });
 
+                Beatmap.Value.Beatmap.ControlPointInfo.Add(0, new DifficultyControlPoint { SpeedMultiplier = 0.1f });
+
                 var p = new ScoreAccessibleReplayPlayer(new Score { Replay = new Replay { Frames = frames } });
 
                 p.OnLoadComplete += _ =>

osu.Game.Rulesets.Taiko.Tests/TestSceneTaikoPlayfield.cs

@@ -66,7 +66,7 @@ namespace osu.Game.Rulesets.Taiko.Tests
             AddStep("Reset height", () => changePlayfieldSize(6));
 
             var controlPointInfo = new ControlPointInfo();
-            controlPointInfo.TimingPoints.Add(new TimingControlPoint());
+            controlPointInfo.Add(0, new TimingControlPoint());
 
             WorkingBeatmap beatmap = CreateWorkingBeatmap(new Beatmap
             {
@@ -142,7 +142,7 @@ namespace osu.Game.Rulesets.Taiko.Tests
             HitResult hitResult = RNG.Next(2) == 0 ? HitResult.Good : HitResult.Great;
 
             var cpi = new ControlPointInfo();
-            cpi.EffectPoints.Add(new EffectControlPoint { KiaiMode = kiai });
+            cpi.Add(0, new EffectControlPoint { KiaiMode = kiai });
 
             Hit hit = new Hit();
             hit.ApplyDefaults(cpi, new BeatmapDifficulty());
@@ -157,7 +157,7 @@ namespace osu.Game.Rulesets.Taiko.Tests
             HitResult hitResult = RNG.Next(2) == 0 ? HitResult.Good : HitResult.Great;
 
             var cpi = new ControlPointInfo();
-            cpi.EffectPoints.Add(new EffectControlPoint { KiaiMode = kiai });
+            cpi.Add(0, new EffectControlPoint { KiaiMode = kiai });
 
             Hit hit = new Hit();
             hit.ApplyDefaults(cpi, new BeatmapDifficulty());

osu.Game.Rulesets.Taiko/Audio/DrumSampleMapping.cs

@@ -19,12 +19,7 @@ namespace osu.Game.Rulesets.Taiko.Audio
         {
             this.controlPoints = controlPoints;
 
-            IEnumerable<SampleControlPoint> samplePoints;
+            IEnumerable<SampleControlPoint> samplePoints = controlPoints.SamplePoints.Count == 0 ? new[] { controlPoints.SamplePointAt(double.MinValue) } : controlPoints.SamplePoints;
-            if (controlPoints.SamplePoints.Count == 0)
-                // Get the default sample point
-                samplePoints = new[] { controlPoints.SamplePointAt(double.MinValue) };
-            else
-                samplePoints = controlPoints.SamplePoints;
 
             foreach (var s in samplePoints)
             {

osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapDecoderTest.cs

@@ -167,9 +167,9 @@ namespace osu.Game.Tests.Beatmaps.Formats
                 var controlPoints = beatmap.ControlPointInfo;
 
                 Assert.AreEqual(4, controlPoints.TimingPoints.Count);
-                Assert.AreEqual(42, controlPoints.DifficultyPoints.Count);
+                Assert.AreEqual(5, controlPoints.DifficultyPoints.Count);
-                Assert.AreEqual(42, controlPoints.SamplePoints.Count);
+                Assert.AreEqual(34, controlPoints.SamplePoints.Count);
-                Assert.AreEqual(42, controlPoints.EffectPoints.Count);
+                Assert.AreEqual(8, controlPoints.EffectPoints.Count);
 
                 var timingPoint = controlPoints.TimingPointAt(0);
                 Assert.AreEqual(956, timingPoint.Time);
@@ -191,7 +191,7 @@ namespace osu.Game.Tests.Beatmaps.Formats
                 Assert.AreEqual(1.0, difficultyPoint.SpeedMultiplier);
 
                 difficultyPoint = controlPoints.DifficultyPointAt(48428);
-                Assert.AreEqual(48428, difficultyPoint.Time);
+                Assert.AreEqual(0, difficultyPoint.Time);
                 Assert.AreEqual(1.0, difficultyPoint.SpeedMultiplier);
 
                 difficultyPoint = controlPoints.DifficultyPointAt(116999);
@@ -224,7 +224,7 @@ namespace osu.Game.Tests.Beatmaps.Formats
                 Assert.IsFalse(effectPoint.OmitFirstBarLine);
 
                 effectPoint = controlPoints.EffectPointAt(119637);
-                Assert.AreEqual(119637, effectPoint.Time);
+                Assert.AreEqual(95901, effectPoint.Time);
                 Assert.IsFalse(effectPoint.KiaiMode);
                 Assert.IsFalse(effectPoint.OmitFirstBarLine);
             }
@@ -262,6 +262,21 @@ namespace osu.Game.Tests.Beatmaps.Formats
             }
         }
 
+        [Test]
+        public void TestTimingPointResetsSpeedMultiplier()
+        {
+            var decoder = new LegacyBeatmapDecoder { ApplyOffsets = false };
+
+            using (var resStream = TestResources.OpenResource("timingpoint-speedmultiplier-reset.osu"))
+            using (var stream = new LineBufferedReader(resStream))
+            {
+                var controlPoints = decoder.Decode(stream).ControlPointInfo;
+
+                Assert.That(controlPoints.DifficultyPointAt(0).SpeedMultiplier, Is.EqualTo(0.5).Within(0.1));
+                Assert.That(controlPoints.DifficultyPointAt(2000).SpeedMultiplier, Is.EqualTo(1).Within(0.1));
+            }
+        }
+
         [Test]
         public void TestDecodeBeatmapColours()
         {

osu.Game.Tests/Editor/TestSceneHitObjectComposerDistanceSnapping.cs

@@ -25,11 +25,10 @@ namespace osu.Game.Tests.Editor
             BeatDivisor.Value = 1;
 
             composer.EditorBeatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier = 1;
-            composer.EditorBeatmap.ControlPointInfo.DifficultyPoints.Clear();
+            composer.EditorBeatmap.ControlPointInfo.Clear();
-            composer.EditorBeatmap.ControlPointInfo.TimingPoints.Clear();
 
-            composer.EditorBeatmap.ControlPointInfo.DifficultyPoints.Add(new DifficultyControlPoint { SpeedMultiplier = 1 });
+            composer.EditorBeatmap.ControlPointInfo.Add(0, new DifficultyControlPoint { SpeedMultiplier = 1 });
-            composer.EditorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = 1000 });
+            composer.EditorBeatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = 1000 });
         });
 
         [TestCase(1)]
@@ -47,8 +46,8 @@ namespace osu.Game.Tests.Editor
         {
             AddStep($"set multiplier = {multiplier}", () =>
             {
-                composer.EditorBeatmap.ControlPointInfo.DifficultyPoints.Clear();
+                composer.EditorBeatmap.ControlPointInfo.Clear();
-                composer.EditorBeatmap.ControlPointInfo.DifficultyPoints.Add(new DifficultyControlPoint { SpeedMultiplier = multiplier });
+                composer.EditorBeatmap.ControlPointInfo.Add(0, new DifficultyControlPoint { SpeedMultiplier = multiplier });
             });
 
             assertSnapDistance(100 * multiplier);
@@ -76,8 +75,8 @@ namespace osu.Game.Tests.Editor
 
             AddStep("set beat length = 500", () =>
             {
-                composer.EditorBeatmap.ControlPointInfo.TimingPoints.Clear();
+                composer.EditorBeatmap.ControlPointInfo.Clear();
-                composer.EditorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = 500 });
+                composer.EditorBeatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = 500 });
             });
 
             assertDurationToDistance(500, 200);
@@ -97,8 +96,8 @@ namespace osu.Game.Tests.Editor
 
             AddStep("set beat length = 500", () =>
             {
-                composer.EditorBeatmap.ControlPointInfo.TimingPoints.Clear();
+                composer.EditorBeatmap.ControlPointInfo.Clear();
-                composer.EditorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = 500 });
+                composer.EditorBeatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = 500 });
             });
 
             assertDistanceToDuration(200, 500);
@@ -124,8 +123,8 @@ namespace osu.Game.Tests.Editor
 
             AddStep("set beat length = 500", () =>
             {
-                composer.EditorBeatmap.ControlPointInfo.TimingPoints.Clear();
+                composer.EditorBeatmap.ControlPointInfo.Clear();
-                composer.EditorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = 500 });
+                composer.EditorBeatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = 500 });
             });
 
             assertSnappedDuration(50, 0);
@@ -155,8 +154,8 @@ namespace osu.Game.Tests.Editor
 
             AddStep("set beat length = 500", () =>
             {
-                composer.EditorBeatmap.ControlPointInfo.TimingPoints.Clear();
+                composer.EditorBeatmap.ControlPointInfo.Clear();
-                composer.EditorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = 500 });
+                composer.EditorBeatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = 500 });
             });
 
             assertSnappedDistance(50, 0);

osu.Game.Tests/NonVisual/ControlPointInfoTest.cs

@@ -0,0 +1,227 @@
+// 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 System.Linq;
+using NUnit.Framework;
+using osu.Game.Beatmaps.ControlPoints;
+
+namespace osu.Game.Tests.NonVisual
+{
+    [TestFixture]
+    public class ControlPointInfoTest
+    {
+        [Test]
+        public void TestAdd()
+        {
+            var cpi = new ControlPointInfo();
+
+            cpi.Add(0, new TimingControlPoint());
+            cpi.Add(1000, new TimingControlPoint { BeatLength = 500 });
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(2));
+            Assert.That(cpi.TimingPoints.Count, Is.EqualTo(2));
+            Assert.That(cpi.AllControlPoints.Count(), Is.EqualTo(2));
+        }
+
+        [Test]
+        public void TestAddRedundantTiming()
+        {
+            var cpi = new ControlPointInfo();
+
+            cpi.Add(0, new TimingControlPoint()); // is *not* redundant, special exception for first timing point.
+            cpi.Add(1000, new TimingControlPoint()); // is redundant
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+            Assert.That(cpi.TimingPoints.Count, Is.EqualTo(1));
+            Assert.That(cpi.AllControlPoints.Count(), Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestAddRedundantDifficulty()
+        {
+            var cpi = new ControlPointInfo();
+
+            cpi.Add(0, new DifficultyControlPoint()); // is redundant
+            cpi.Add(1000, new DifficultyControlPoint()); // is redundant
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(0));
+            Assert.That(cpi.TimingPoints.Count, Is.EqualTo(0));
+            Assert.That(cpi.AllControlPoints.Count(), Is.EqualTo(0));
+
+            cpi.Add(1000, new DifficultyControlPoint { SpeedMultiplier = 2 }); // is not redundant
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+            Assert.That(cpi.DifficultyPoints.Count, Is.EqualTo(1));
+            Assert.That(cpi.AllControlPoints.Count(), Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestAddRedundantSample()
+        {
+            var cpi = new ControlPointInfo();
+
+            cpi.Add(0, new SampleControlPoint()); // is redundant
+            cpi.Add(1000, new SampleControlPoint()); // is redundant
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(0));
+            Assert.That(cpi.TimingPoints.Count, Is.EqualTo(0));
+            Assert.That(cpi.AllControlPoints.Count(), Is.EqualTo(0));
+
+            cpi.Add(1000, new SampleControlPoint { SampleVolume = 50 }); // is not redundant
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+            Assert.That(cpi.SamplePoints.Count, Is.EqualTo(1));
+            Assert.That(cpi.AllControlPoints.Count(), Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestAddRedundantEffect()
+        {
+            var cpi = new ControlPointInfo();
+
+            cpi.Add(0, new EffectControlPoint()); // is redundant
+            cpi.Add(1000, new EffectControlPoint()); // is redundant
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(0));
+            Assert.That(cpi.TimingPoints.Count, Is.EqualTo(0));
+            Assert.That(cpi.AllControlPoints.Count(), Is.EqualTo(0));
+
+            cpi.Add(1000, new EffectControlPoint { KiaiMode = true }); // is not redundant
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+            Assert.That(cpi.EffectPoints.Count, Is.EqualTo(1));
+            Assert.That(cpi.AllControlPoints.Count(), Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestAddGroup()
+        {
+            var cpi = new ControlPointInfo();
+
+            var group = cpi.GroupAt(1000, true);
+            var group2 = cpi.GroupAt(1000, true);
+
+            Assert.That(group, Is.EqualTo(group2));
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestGroupAtLookupOnly()
+        {
+            var cpi = new ControlPointInfo();
+
+            var group = cpi.GroupAt(5000, true);
+            Assert.That(group, Is.Not.Null);
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+            Assert.That(cpi.GroupAt(1000), Is.Null);
+            Assert.That(cpi.GroupAt(5000), Is.Not.Null);
+        }
+
+        [Test]
+        public void TestAddRemoveGroup()
+        {
+            var cpi = new ControlPointInfo();
+
+            var group = cpi.GroupAt(1000, true);
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+
+            cpi.RemoveGroup(group);
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(0));
+        }
+
+        [Test]
+        public void TestAddControlPointToGroup()
+        {
+            var cpi = new ControlPointInfo();
+
+            var group = cpi.GroupAt(1000, true);
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+
+            // usually redundant, but adding to group forces it to be added
+            group.Add(new DifficultyControlPoint());
+
+            Assert.That(group.ControlPoints.Count, Is.EqualTo(1));
+            Assert.That(cpi.DifficultyPoints.Count, Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestAddDuplicateControlPointToGroup()
+        {
+            var cpi = new ControlPointInfo();
+
+            var group = cpi.GroupAt(1000, true);
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+
+            group.Add(new DifficultyControlPoint());
+            group.Add(new DifficultyControlPoint { SpeedMultiplier = 2 });
+
+            Assert.That(group.ControlPoints.Count, Is.EqualTo(1));
+            Assert.That(cpi.DifficultyPoints.Count, Is.EqualTo(1));
+            Assert.That(cpi.DifficultyPoints.First().SpeedMultiplier, Is.EqualTo(2));
+        }
+
+        [Test]
+        public void TestRemoveControlPointFromGroup()
+        {
+            var cpi = new ControlPointInfo();
+
+            var group = cpi.GroupAt(1000, true);
+            Assert.That(cpi.Groups.Count, Is.EqualTo(1));
+
+            var difficultyPoint = new DifficultyControlPoint();
+
+            group.Add(difficultyPoint);
+            group.Remove(difficultyPoint);
+
+            Assert.That(group.ControlPoints.Count, Is.EqualTo(0));
+            Assert.That(cpi.DifficultyPoints.Count, Is.EqualTo(0));
+            Assert.That(cpi.AllControlPoints.Count, Is.EqualTo(0));
+        }
+
+        [Test]
+        public void TestOrdering()
+        {
+            var cpi = new ControlPointInfo();
+
+            cpi.Add(0, new TimingControlPoint());
+            cpi.Add(1000, new TimingControlPoint { BeatLength = 500 });
+            cpi.Add(10000, new TimingControlPoint { BeatLength = 200 });
+            cpi.Add(5000, new TimingControlPoint { BeatLength = 100 });
+            cpi.Add(3000, new DifficultyControlPoint { SpeedMultiplier = 2 });
+            cpi.GroupAt(7000, true).Add(new DifficultyControlPoint { SpeedMultiplier = 4 });
+            cpi.GroupAt(1000).Add(new SampleControlPoint { SampleVolume = 0 });
+            cpi.GroupAt(8000, true).Add(new EffectControlPoint { KiaiMode = true });
+
+            Assert.That(cpi.AllControlPoints.Count, Is.EqualTo(8));
+
+            Assert.That(cpi.Groups, Is.Ordered.Ascending.By(nameof(ControlPointGroup.Time)));
+
+            Assert.That(cpi.AllControlPoints, Is.Ordered.Ascending.By(nameof(ControlPoint.Time)));
+            Assert.That(cpi.TimingPoints, Is.Ordered.Ascending.By(nameof(ControlPoint.Time)));
+        }
+
+        [Test]
+        public void TestClear()
+        {
+            var cpi = new ControlPointInfo();
+
+            cpi.Add(0, new TimingControlPoint());
+            cpi.Add(1000, new TimingControlPoint { BeatLength = 500 });
+            cpi.Add(10000, new TimingControlPoint { BeatLength = 200 });
+            cpi.Add(5000, new TimingControlPoint { BeatLength = 100 });
+            cpi.Add(3000, new DifficultyControlPoint { SpeedMultiplier = 2 });
+            cpi.GroupAt(7000, true).Add(new DifficultyControlPoint { SpeedMultiplier = 4 });
+            cpi.GroupAt(1000).Add(new SampleControlPoint { SampleVolume = 0 });
+            cpi.GroupAt(8000, true).Add(new EffectControlPoint { KiaiMode = true });
+
+            cpi.Clear();
+
+            Assert.That(cpi.Groups.Count, Is.EqualTo(0));
+            Assert.That(cpi.DifficultyPoints.Count, Is.EqualTo(0));
+            Assert.That(cpi.AllControlPoints.Count, Is.EqualTo(0));
+        }
+    }
+}

osu.Game.Tests/Resources/timingpoint-speedmultiplier-reset.osu

@@ -0,0 +1,5 @@
+osu file format v14
+
+[TimingPoints]
+0,-200,4,1,0,100,0,0
+2000,100,1,1,0,100,1,0

osu.Game.Tests/Visual/Editor/TestSceneDistanceSnapGrid.cs

@@ -31,7 +31,7 @@ namespace osu.Game.Tests.Visual.Editor
         public TestSceneDistanceSnapGrid()
         {
             editorBeatmap = new EditorBeatmap<OsuHitObject>(new OsuBeatmap());
-            editorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = beat_length });
+            editorBeatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = beat_length });
 
             Children = new Drawable[]
             {

osu.Game.Tests/Visual/Editor/TestSceneEditorSeekSnapping.cs

@@ -28,18 +28,7 @@ namespace osu.Game.Tests.Visual.Editor
         {
             var testBeatmap = new Beatmap
             {
-                ControlPointInfo = new ControlPointInfo
+                ControlPointInfo = new ControlPointInfo(),
-                {
-                    TimingPoints =
-                    {
-                        new TimingControlPoint { Time = 0, BeatLength = 200 },
-                        new TimingControlPoint { Time = 100, BeatLength = 400 },
-                        new TimingControlPoint { Time = 175, BeatLength = 800 },
-                        new TimingControlPoint { Time = 350, BeatLength = 200 },
-                        new TimingControlPoint { Time = 450, BeatLength = 100 },
-                        new TimingControlPoint { Time = 500, BeatLength = 307.69230769230802 }
-                    }
-                },
                 HitObjects =
                 {
                     new HitCircle { StartTime = 0 },
@@ -47,6 +36,13 @@ namespace osu.Game.Tests.Visual.Editor
                 }
             };
 
+            testBeatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = 200 });
+            testBeatmap.ControlPointInfo.Add(100, new TimingControlPoint { BeatLength = 400 });
+            testBeatmap.ControlPointInfo.Add(175, new TimingControlPoint { BeatLength = 800 });
+            testBeatmap.ControlPointInfo.Add(350, new TimingControlPoint { BeatLength = 200 });
+            testBeatmap.ControlPointInfo.Add(450, new TimingControlPoint { BeatLength = 100 });
+            testBeatmap.ControlPointInfo.Add(500, new TimingControlPoint { BeatLength = 307.69230769230802 });
+
             Beatmap.Value = CreateWorkingBeatmap(testBeatmap);
 
             Child = new TimingPointVisualiser(testBeatmap, 5000) { Clock = Clock };

osu.Game.Tests/Visual/Gameplay/TestSceneDrawableScrollingRuleset.cs

@@ -47,7 +47,8 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Test]
         public void TestRelativeBeatLengthScaleSingleTimingPoint()
         {
-            var beatmap = createBeatmap(new TimingControlPoint { BeatLength = time_range / 2 });
+            var beatmap = createBeatmap();
+            beatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = time_range / 2 });
 
             createTest(beatmap, d => d.RelativeScaleBeatLengthsOverride = true);
 
@@ -61,10 +62,10 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Test]
         public void TestRelativeBeatLengthScaleTimingPointBeyondEndDoesNotBecomeDominant()
         {
-            var beatmap = createBeatmap(
+            var beatmap = createBeatmap();
-                new TimingControlPoint { BeatLength = time_range / 2 },
+            beatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = time_range / 2 });
-                new TimingControlPoint { Time = 12000, BeatLength = time_range },
+            beatmap.ControlPointInfo.Add(12000, new TimingControlPoint { BeatLength = time_range });
-                new TimingControlPoint { Time = 100000, BeatLength = time_range });
+            beatmap.ControlPointInfo.Add(100000, new TimingControlPoint { BeatLength = time_range });
 
             createTest(beatmap, d => d.RelativeScaleBeatLengthsOverride = true);
 
@@ -75,9 +76,9 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Test]
         public void TestRelativeBeatLengthScaleFromSecondTimingPoint()
         {
-            var beatmap = createBeatmap(
+            var beatmap = createBeatmap();
-                new TimingControlPoint { BeatLength = time_range },
+            beatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = time_range });
-                new TimingControlPoint { Time = 3 * time_range, BeatLength = time_range / 2 });
+            beatmap.ControlPointInfo.Add(3 * time_range, new TimingControlPoint { BeatLength = time_range / 2 });
 
             createTest(beatmap, d => d.RelativeScaleBeatLengthsOverride = true);
 
@@ -97,9 +98,9 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Test]
         public void TestNonRelativeScale()
         {
-            var beatmap = createBeatmap(
+            var beatmap = createBeatmap();
-                new TimingControlPoint { BeatLength = time_range },
+            beatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = time_range });
-                new TimingControlPoint { Time = 3 * time_range, BeatLength = time_range / 2 });
+            beatmap.ControlPointInfo.Add(3 * time_range, new TimingControlPoint { BeatLength = time_range / 2 });
 
             createTest(beatmap);
 
@@ -119,7 +120,8 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Test]
         public void TestSliderMultiplierDoesNotAffectRelativeBeatLength()
         {
-            var beatmap = createBeatmap(new TimingControlPoint { BeatLength = time_range });
+            var beatmap = createBeatmap();
+            beatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = time_range });
             beatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier = 2;
 
             createTest(beatmap, d => d.RelativeScaleBeatLengthsOverride = true);
@@ -132,7 +134,8 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Test]
         public void TestSliderMultiplierAffectsNonRelativeBeatLength()
         {
-            var beatmap = createBeatmap(new TimingControlPoint { BeatLength = time_range });
+            var beatmap = createBeatmap();
+            beatmap.ControlPointInfo.Add(0, new TimingControlPoint { BeatLength = time_range });
             beatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier = 2;
 
             createTest(beatmap);
@@ -154,14 +157,11 @@ namespace osu.Game.Tests.Visual.Gameplay
         /// Creates an <see cref="IBeatmap"/>, containing 10 hitobjects and user-provided timing points.
         /// The hitobjects are spaced <see cref="time_range"/> milliseconds apart.
         /// </summary>
-        /// <param name="timingControlPoints">The timing points to add to the beatmap.</param>
         /// <returns>The <see cref="IBeatmap"/>.</returns>
-        private IBeatmap createBeatmap(params TimingControlPoint[] timingControlPoints)
+        private IBeatmap createBeatmap()
         {
             var beatmap = new Beatmap<HitObject> { BeatmapInfo = { Ruleset = new OsuRuleset().RulesetInfo } };
 
-            beatmap.ControlPointInfo.TimingPoints.AddRange(timingControlPoints);
-
             for (int i = 0; i < 10; i++)
                 beatmap.HitObjects.Add(new HitObject { StartTime = i * time_range });
 

osu.Game.Tests/Visual/UserInterface/TestSceneBeatSyncedContainer.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Audio.Track;
@@ -10,7 +11,6 @@ using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
-using osu.Framework.Lists;
 using osu.Framework.Timing;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Graphics;
@@ -153,7 +153,7 @@ namespace osu.Game.Tests.Visual.UserInterface
                 };
             }
 
-            private SortedList<TimingControlPoint> timingPoints => Beatmap.Value.Beatmap.ControlPointInfo.TimingPoints;
+            private List<TimingControlPoint> timingPoints => Beatmap.Value.Beatmap.ControlPointInfo.TimingPoints.ToList();
 
             private TimingControlPoint getNextTimingPoint(TimingControlPoint current)
             {

osu.Game/Beatmaps/ControlPoints/ControlPoint.cs

@@ -1,4 +1,4 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// 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 System;
@@ -10,12 +10,11 @@ namespace osu.Game.Beatmaps.ControlPoints
         /// <summary>
         /// The time at which the control point takes effect.
         /// </summary>
-        public double Time;
+        public double Time => controlPointGroup?.Time ?? 0;
 
-        /// <summary>
+        private ControlPointGroup controlPointGroup;
-        /// Whether this timing point was generated internally, as opposed to parsed from the underlying beatmap.
+
-        /// </summary>
+        public void AttachGroup(ControlPointGroup pointGroup) => this.controlPointGroup = pointGroup;
-        internal bool AutoGenerated;
 
         public int CompareTo(ControlPoint other) => Time.CompareTo(other.Time);
 

osu.Game/Beatmaps/ControlPoints/ControlPointGroup.cs

@@ -0,0 +1,50 @@
+// 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 System;
+using System.Linq;
+using osu.Framework.Bindables;
+
+namespace osu.Game.Beatmaps.ControlPoints
+{
+    public class ControlPointGroup : IComparable<ControlPointGroup>
+    {
+        public event Action<ControlPoint> ItemAdded;
+        public event Action<ControlPoint> ItemRemoved;
+
+        /// <summary>
+        /// The time at which the control point takes effect.
+        /// </summary>
+        public double Time { get; }
+
+        public IBindableList<ControlPoint> ControlPoints => controlPoints;
+
+        private readonly BindableList<ControlPoint> controlPoints = new BindableList<ControlPoint>();
+
+        public ControlPointGroup(double time)
+        {
+            Time = time;
+        }
+
+        public int CompareTo(ControlPointGroup other) => Time.CompareTo(other.Time);
+
+        public void Add(ControlPoint point)
+        {
+            var existing = controlPoints.FirstOrDefault(p => p.GetType() == point.GetType());
+
+            if (existing != null)
+                Remove(existing);
+
+            point.AttachGroup(this);
+
+            controlPoints.Add(point);
+            ItemAdded?.Invoke(point);
+        }
+
+        public void Remove(ControlPoint point)
+        {
+            controlPoints.Remove(point);
+            ItemRemoved?.Invoke(point);
+        }
+    }
+}

osu.Game/Beatmaps/ControlPoints/ControlPointInfo.cs

@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using Newtonsoft.Json;
+using osu.Framework.Bindables;
 using osu.Framework.Lists;
 
 namespace osu.Game.Beatmaps.ControlPoints
@@ -12,57 +13,78 @@ namespace osu.Game.Beatmaps.ControlPoints
     [Serializable]
     public class ControlPointInfo
     {
+        /// <summary>
+        /// All control points grouped by time.
+        /// </summary>
+        [JsonProperty]
+        public IBindableList<ControlPointGroup> Groups => groups;
+
+        private readonly BindableList<ControlPointGroup> groups = new BindableList<ControlPointGroup>();
+
         /// <summary>
         /// All timing points.
         /// </summary>
         [JsonProperty]
-        public SortedList<TimingControlPoint> TimingPoints { get; private set; } = new SortedList<TimingControlPoint>(Comparer<TimingControlPoint>.Default);
+        public IReadOnlyList<TimingControlPoint> TimingPoints => timingPoints;
+
+        private readonly SortedList<TimingControlPoint> timingPoints = new SortedList<TimingControlPoint>(Comparer<TimingControlPoint>.Default);
 
         /// <summary>
         /// All difficulty points.
         /// </summary>
         [JsonProperty]
-        public SortedList<DifficultyControlPoint> DifficultyPoints { get; private set; } = new SortedList<DifficultyControlPoint>(Comparer<DifficultyControlPoint>.Default);
+        public IReadOnlyList<DifficultyControlPoint> DifficultyPoints => difficultyPoints;
+
+        private readonly SortedList<DifficultyControlPoint> difficultyPoints = new SortedList<DifficultyControlPoint>(Comparer<DifficultyControlPoint>.Default);
 
         /// <summary>
         /// All sound points.
         /// </summary>
         [JsonProperty]
-        public SortedList<SampleControlPoint> SamplePoints { get; private set; } = new SortedList<SampleControlPoint>(Comparer<SampleControlPoint>.Default);
+        public IReadOnlyList<SampleControlPoint> SamplePoints => samplePoints;
+
+        private readonly SortedList<SampleControlPoint> samplePoints = new SortedList<SampleControlPoint>(Comparer<SampleControlPoint>.Default);
 
         /// <summary>
         /// All effect points.
         /// </summary>
         [JsonProperty]
-        public SortedList<EffectControlPoint> EffectPoints { get; private set; } = new SortedList<EffectControlPoint>(Comparer<EffectControlPoint>.Default);
+        public IReadOnlyList<EffectControlPoint> EffectPoints => effectPoints;
+
+        private readonly SortedList<EffectControlPoint> effectPoints = new SortedList<EffectControlPoint>(Comparer<EffectControlPoint>.Default);
+
+        /// <summary>
+        /// All control points, of all types.
+        /// </summary>
+        public IEnumerable<ControlPoint> AllControlPoints => Groups.SelectMany(g => g.ControlPoints).ToArray();
 
         /// <summary>
         /// Finds the difficulty control point that is active at <paramref name="time"/>.
         /// </summary>
         /// <param name="time">The time to find the difficulty control point at.</param>
         /// <returns>The difficulty control point.</returns>
-        public DifficultyControlPoint DifficultyPointAt(double time) => binarySearch(DifficultyPoints, time);
+        public DifficultyControlPoint DifficultyPointAt(double time) => binarySearchWithFallback(DifficultyPoints, time);
 
         /// <summary>
         /// Finds the effect control point that is active at <paramref name="time"/>.
         /// </summary>
         /// <param name="time">The time to find the effect control point at.</param>
         /// <returns>The effect control point.</returns>
-        public EffectControlPoint EffectPointAt(double time) => binarySearch(EffectPoints, time);
+        public EffectControlPoint EffectPointAt(double time) => binarySearchWithFallback(EffectPoints, time);
 
         /// <summary>
         /// Finds the sound control point that is active at <paramref name="time"/>.
         /// </summary>
         /// <param name="time">The time to find the sound control point at.</param>
         /// <returns>The sound control point.</returns>
-        public SampleControlPoint SamplePointAt(double time) => binarySearch(SamplePoints, time, SamplePoints.Count > 0 ? SamplePoints[0] : null);
+        public SampleControlPoint SamplePointAt(double time) => binarySearchWithFallback(SamplePoints, time, SamplePoints.Count > 0 ? SamplePoints[0] : null);
 
         /// <summary>
         /// Finds the timing control point that is active at <paramref name="time"/>.
         /// </summary>
         /// <param name="time">The time to find the timing control point at.</param>
         /// <returns>The timing control point.</returns>
-        public TimingControlPoint TimingPointAt(double time) => binarySearch(TimingPoints, time, TimingPoints.Count > 0 ? TimingPoints[0] : null);
+        public TimingControlPoint TimingPointAt(double time) => binarySearchWithFallback(TimingPoints, time, TimingPoints.Count > 0 ? TimingPoints[0] : null);
 
         /// <summary>
         /// Finds the maximum BPM represented by any timing control point.
@@ -85,24 +107,93 @@ namespace osu.Game.Beatmaps.ControlPoints
         public double BPMMode =>
             60000 / (TimingPoints.GroupBy(c => c.BeatLength).OrderByDescending(grp => grp.Count()).FirstOrDefault()?.FirstOrDefault() ?? new TimingControlPoint()).BeatLength;
 
+        /// <summary>
+        /// Remove all <see cref="ControlPointGroup"/>s and return to a pristine state.
+        /// </summary>
+        public void Clear()
+        {
+            groups.Clear();
+            timingPoints.Clear();
+            difficultyPoints.Clear();
+            samplePoints.Clear();
+            effectPoints.Clear();
+        }
+
+        /// <summary>
+        /// Add a new <see cref="ControlPoint"/>. Note that the provided control point may not be added if the correct state is already present at the provided time.
+        /// </summary>
+        /// <param name="time">The time at which the control point should be added.</param>
+        /// <param name="controlPoint">The control point to add.</param>
+        /// <returns>Whether the control point was added.</returns>
+        public bool Add(double time, ControlPoint controlPoint)
+        {
+            if (checkAlreadyExisting(time, controlPoint))
+                return false;
+
+            GroupAt(time, true).Add(controlPoint);
+            return true;
+        }
+
+        public ControlPointGroup GroupAt(double time, bool addIfNotExisting = false)
+        {
+            var newGroup = new ControlPointGroup(time);
+
+            int i = groups.BinarySearch(newGroup);
+
+            if (i >= 0)
+                return groups[i];
+
+            if (addIfNotExisting)
+            {
+                newGroup.ItemAdded += groupItemAdded;
+                newGroup.ItemRemoved += groupItemRemoved;
+
+                groups.Insert(~i, newGroup);
+                return newGroup;
+            }
+
+            return null;
+        }
+
+        public void RemoveGroup(ControlPointGroup group)
+        {
+            group.ItemAdded -= groupItemAdded;
+            group.ItemRemoved -= groupItemRemoved;
+
+            groups.Remove(group);
+        }
+
         /// <summary>
         /// Binary searches one of the control point lists to find the active control point at <paramref name="time"/>.
+        /// Includes logic for returning a specific point when no matching point is found.
         /// </summary>
         /// <param name="list">The list to search.</param>
         /// <param name="time">The time to find the control point at.</param>
         /// <param name="prePoint">The control point to use when <paramref name="time"/> is before any control points. If null, a new control point will be constructed.</param>
-        /// <returns>The active control point at <paramref name="time"/>.</returns>
+        /// <returns>The active control point at <paramref name="time"/>, or a fallback <see cref="ControlPoint"/> if none found.</returns>
-        private T binarySearch<T>(SortedList<T> list, double time, T prePoint = null)
+        private T binarySearchWithFallback<T>(IReadOnlyList<T> list, double time, T prePoint = null)
             where T : ControlPoint, new()
+        {
+            return binarySearch(list, time) ?? prePoint ?? new T();
+        }
+
+        /// <summary>
+        /// Binary searches one of the control point lists to find the active control point at <paramref name="time"/>.
+        /// </summary>
+        /// <param name="list">The list to search.</param>
+        /// <param name="time">The time to find the control point at.</param>
+        /// <returns>The active control point at <paramref name="time"/>.</returns>
+        private T binarySearch<T>(IReadOnlyList<T> list, double time)
+            where T : ControlPoint
         {
             if (list == null)
                 throw new ArgumentNullException(nameof(list));
 
             if (list.Count == 0)
-                return new T();
+                return null;
 
             if (time < list[0].Time)
-                return prePoint ?? new T();
+                return null;
 
             if (time >= list[list.Count - 1].Time)
                 return list[list.Count - 1];
@@ -125,5 +216,82 @@ namespace osu.Game.Beatmaps.ControlPoints
             // l will be the first control point with Time > time, but we want the one before it
             return list[l - 1];
         }
+
+        /// <summary>
+        /// Check whether <see cref="newPoint"/> should be added.
+        /// </summary>
+        /// <param name="time">The time to find the timing control point at.</param>
+        /// <param name="newPoint">A point to be added.</param>
+        /// <returns>Whether the new point should be added.</returns>
+        private bool checkAlreadyExisting(double time, ControlPoint newPoint)
+        {
+            ControlPoint existing = null;
+
+            switch (newPoint)
+            {
+                case TimingControlPoint _:
+                    // Timing points are a special case and need to be added regardless of fallback availability.
+                    existing = binarySearch(TimingPoints, time);
+                    break;
+
+                case EffectControlPoint _:
+                    existing = EffectPointAt(time);
+                    break;
+
+                case SampleControlPoint _:
+                    existing = SamplePointAt(time);
+                    break;
+
+                case DifficultyControlPoint _:
+                    existing = DifficultyPointAt(time);
+                    break;
+            }
+
+            return existing?.EquivalentTo(newPoint) == true;
+        }
+
+        private void groupItemAdded(ControlPoint controlPoint)
+        {
+            switch (controlPoint)
+            {
+                case TimingControlPoint typed:
+                    timingPoints.Add(typed);
+                    break;
+
+                case EffectControlPoint typed:
+                    effectPoints.Add(typed);
+                    break;
+
+                case SampleControlPoint typed:
+                    samplePoints.Add(typed);
+                    break;
+
+                case DifficultyControlPoint typed:
+                    difficultyPoints.Add(typed);
+                    break;
+            }
+        }
+
+        private void groupItemRemoved(ControlPoint controlPoint)
+        {
+            switch (controlPoint)
+            {
+                case TimingControlPoint typed:
+                    timingPoints.Remove(typed);
+                    break;
+
+                case EffectControlPoint typed:
+                    effectPoints.Remove(typed);
+                    break;
+
+                case SampleControlPoint typed:
+                    samplePoints.Remove(typed);
+                    break;
+
+                case DifficultyControlPoint typed:
+                    difficultyPoints.Remove(typed);
+                    break;
+            }
+        }
     }
 }

osu.Game/Beatmaps/Formats/LegacyBeatmapDecoder.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using osu.Framework.IO.File;
@@ -50,6 +51,8 @@ namespace osu.Game.Beatmaps.Formats
 
             base.ParseStreamInto(stream, beatmap);
 
+            flushPendingPoints();
+
             // Objects may be out of order *only* if a user has manually edited an .osu file.
             // Unfortunately there are ranked maps in this state (example: https://osu.ppy.sh/s/594828).
             // OrderBy is used to guarantee that the parsing order of hitobjects with equal start times is maintained (stably-sorted)
@@ -369,104 +372,64 @@ namespace osu.Game.Beatmaps.Formats
             if (timingChange)
             {
                 var controlPoint = CreateTimingControlPoint();
-                controlPoint.Time = time;
+
                 controlPoint.BeatLength = beatLength;
                 controlPoint.TimeSignature = timeSignature;
 
-                handleTimingControlPoint(controlPoint);
+                addControlPoint(time, controlPoint, true);
             }
 
-            handleDifficultyControlPoint(new LegacyDifficultyControlPoint
+            addControlPoint(time, new LegacyDifficultyControlPoint
             {
-                Time = time,
                 SpeedMultiplier = speedMultiplier,
-                AutoGenerated = timingChange
+            }, timingChange);
-            });
 
-            handleEffectControlPoint(new EffectControlPoint
+            addControlPoint(time, new EffectControlPoint
             {
-                Time = time,
                 KiaiMode = kiaiMode,
                 OmitFirstBarLine = omitFirstBarSignature,
-                AutoGenerated = timingChange
+            }, timingChange);
-            });
 
-            handleSampleControlPoint(new LegacySampleControlPoint
+            addControlPoint(time, new LegacySampleControlPoint
             {
-                Time = time,
                 SampleBank = stringSampleSet,
                 SampleVolume = sampleVolume,
                 CustomSampleBank = customSampleBank,
-                AutoGenerated = timingChange
+            }, timingChange);
-            });
+
+            // To handle the scenario where a non-timing line shares the same time value as a subsequent timing line but
+            // appears earlier in the file, we buffer non-timing control points and rewrite them *after* control points from the timing line
+            // with the same time value (allowing them to overwrite as necessary).
+            //
+            // The expected outcome is that we prefer the non-timing line's adjustments over the timing line's adjustments when time is equal.
+            if (timingChange)
+                flushPendingPoints();
         }
 
-        private void handleTimingControlPoint(TimingControlPoint newPoint)
+        private readonly List<ControlPoint> pendingControlPoints = new List<ControlPoint>();
+        private double pendingControlPointsTime;
+
+        private void addControlPoint(double time, ControlPoint point, bool timingChange)
         {
-            var existing = beatmap.ControlPointInfo.TimingPointAt(newPoint.Time);
+            if (time != pendingControlPointsTime)
+                flushPendingPoints();
 
-            if (existing.Time == newPoint.Time)
+            if (timingChange)
             {
-                // autogenerated points should not replace non-autogenerated.
+                beatmap.ControlPointInfo.Add(time, point);
-                // this allows for incorrectly ordered timing points to still be correctly handled.
+                return;
-                if (newPoint.AutoGenerated && !existing.AutoGenerated)
-                    return;
-
-                beatmap.ControlPointInfo.TimingPoints.Remove(existing);
             }
 
-            beatmap.ControlPointInfo.TimingPoints.Add(newPoint);
+            pendingControlPoints.Add(point);
+            pendingControlPointsTime = time;
         }
 
-        private void handleDifficultyControlPoint(DifficultyControlPoint newPoint)
+        private void flushPendingPoints()
         {
-            var existing = beatmap.ControlPointInfo.DifficultyPointAt(newPoint.Time);
+            foreach (var p in pendingControlPoints)
+                beatmap.ControlPointInfo.Add(pendingControlPointsTime, p);
 
-            if (existing.Time == newPoint.Time)
+            pendingControlPoints.Clear();
-            {
-                // autogenerated points should not replace non-autogenerated.
-                // this allows for incorrectly ordered timing points to still be correctly handled.
-                if (newPoint.AutoGenerated && !existing.AutoGenerated)
-                    return;
-
-                beatmap.ControlPointInfo.DifficultyPoints.Remove(existing);
-            }
-
-            beatmap.ControlPointInfo.DifficultyPoints.Add(newPoint);
-        }
-
-        private void handleEffectControlPoint(EffectControlPoint newPoint)
-        {
-            var existing = beatmap.ControlPointInfo.EffectPointAt(newPoint.Time);
-
-            if (existing.Time == newPoint.Time)
-            {
-                // autogenerated points should not replace non-autogenerated.
-                // this allows for incorrectly ordered timing points to still be correctly handled.
-                if (newPoint.AutoGenerated && !existing.AutoGenerated)
-                    return;
-
-                beatmap.ControlPointInfo.EffectPoints.Remove(existing);
-            }
-
-            beatmap.ControlPointInfo.EffectPoints.Add(newPoint);
-        }
-
-        private void handleSampleControlPoint(SampleControlPoint newPoint)
-        {
-            var existing = beatmap.ControlPointInfo.SamplePointAt(newPoint.Time);
-
-            if (existing.Time == newPoint.Time)
-            {
-                // autogenerated points should not replace non-autogenerated.
-                // this allows for incorrectly ordered timing points to still be correctly handled.
-                if (newPoint.AutoGenerated && !existing.AutoGenerated)
-                    return;
-
-                beatmap.ControlPointInfo.SamplePoints.Remove(existing);
-            }
-
-            beatmap.ControlPointInfo.SamplePoints.Add(newPoint);
         }
 
         private void handleHitObject(string line)

osu.Game/Graphics/Containers/BeatSyncedContainer.cs

@@ -104,14 +104,10 @@ namespace osu.Game.Graphics.Containers
             defaultTiming = new TimingControlPoint
             {
                 BeatLength = default_beat_length,
-                AutoGenerated = true,
-                Time = 0
             };
 
             defaultEffect = new EffectControlPoint
             {
-                Time = 0,
-                AutoGenerated = true,
                 KiaiMode = false,
                 OmitFirstBarLine = false
             };

osu.Game/Screens/Edit/EditorClock.cs

@@ -57,7 +57,7 @@ namespace osu.Game.Screens.Edit
 
             // Depending on beatSnapLength, we may snap to a beat that is beyond timingPoint's end time, but we want to instead snap to
             // the next timing point's start time
-            var nextTimingPoint = ControlPointInfo.TimingPoints.Find(t => t.Time > timingPoint.Time);
+            var nextTimingPoint = ControlPointInfo.TimingPoints.FirstOrDefault(t => t.Time > timingPoint.Time);
             if (position > nextTimingPoint?.Time)
                 position = nextTimingPoint.Time;
 
@@ -87,7 +87,17 @@ namespace osu.Game.Screens.Edit
             if (direction < 0 && timingPoint.Time == CurrentTime)
             {
                 // When going backwards and we're at the boundary of two timing points, we compute the seek distance with the timing point which we are seeking into
-                int activeIndex = ControlPointInfo.TimingPoints.IndexOf(timingPoint);
+                int activeIndex = -1;
+
+                for (int i = 0; i < ControlPointInfo.TimingPoints.Count; i++)
+                {
+                    if (ControlPointInfo.TimingPoints[i] == timingPoint)
+                    {
+                        activeIndex = i;
+                        break;
+                    }
+                }
+
                 while (activeIndex > 0 && CurrentTime == timingPoint.Time)
                     timingPoint = ControlPointInfo.TimingPoints[--activeIndex];
             }
@@ -124,7 +134,7 @@ namespace osu.Game.Screens.Edit
             if (seekTime < timingPoint.Time && timingPoint != ControlPointInfo.TimingPoints.First())
                 seekTime = timingPoint.Time;
 
-            var nextTimingPoint = ControlPointInfo.TimingPoints.Find(t => t.Time > timingPoint.Time);
+            var nextTimingPoint = ControlPointInfo.TimingPoints.FirstOrDefault(t => t.Time > timingPoint.Time);
             if (seekTime > nextTimingPoint?.Time)
                 seekTime = nextTimingPoint.Time;