Merge branch 'master' into sections

osu-framework

@@ -1 +1 @@
-Subproject commit d00a7df902074d0b3f1479904b7f322db9d39c1f
+Subproject commit 42e26d49b9046fcb96c123b0dfb48e06d741e162

osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs

@@ -11,6 +11,7 @@ using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Mania.Beatmaps.Patterns;
 using osu.Game.Rulesets.Mania.MathUtils;
 using osu.Game.Database;
+using osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy;
 
 namespace osu.Game.Rulesets.Mania.Beatmaps
 {
@@ -83,28 +84,24 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
 
             // Following lines currently commented out to appease resharper
 
-            //Patterns.PatternGenerator conversion = null;
+            Patterns.PatternGenerator conversion = null;
 
             if (distanceData != null)
-            {
+                conversion = new DistanceObjectPatternGenerator(random, original, beatmap, lastPattern);
-                // Slider
-            }
             else if (endTimeData != null)
-            {
+                conversion = new EndTimeObjectPatternGenerator(random, original, beatmap);
-                // Spinner
-            }
             else if (positionData != null)
             {
                 // Circle
             }
 
-            //if (conversion == null)
+            if (conversion == null)
-            return null;
+                return null;
 
-            //Pattern newPattern = conversion.Generate();
+            Pattern newPattern = conversion.Generate();
-            //lastPattern = newPattern;
+            lastPattern = newPattern;
 
-            //return newPattern.HitObjects;
+            return newPattern.HitObjects;
         }
 
         /// <summary>

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs

@@ -0,0 +1,490 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Linq;
+using osu.Game.Audio;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.Timing;
+using osu.Game.Rulesets.Mania.MathUtils;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Mania.Objects;
+
+namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
+{
+    /// <summary>
+    /// A pattern generator for IHasDistance hit objects.
+    /// </summary>
+    internal class DistanceObjectPatternGenerator : PatternGenerator
+    {
+        /// <summary>
+        /// Base osu! slider scoring distance.
+        /// </summary>
+        private const float osu_base_scoring_distance = 100;
+
+        private readonly double endTime;
+        private readonly double segmentDuration;
+        private readonly int repeatCount;
+
+        private PatternType convertType;
+
+        public DistanceObjectPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, Pattern previousPattern)
+            : base(random, hitObject, beatmap, previousPattern)
+        {
+            ControlPoint overridePoint;
+            ControlPoint controlPoint = Beatmap.TimingInfo.TimingPointAt(hitObject.StartTime, out overridePoint);
+
+            convertType = PatternType.None;
+            if ((overridePoint ?? controlPoint)?.KiaiMode == false)
+                convertType = PatternType.LowProbability;
+
+            var distanceData = hitObject as IHasDistance;
+            var repeatsData = hitObject as IHasRepeats;
+
+            repeatCount = repeatsData?.RepeatCount ?? 1;
+
+            double speedAdjustment = beatmap.TimingInfo.SpeedMultiplierAt(hitObject.StartTime);
+            double speedAdjustedBeatLength = beatmap.TimingInfo.BeatLengthAt(hitObject.StartTime) * speedAdjustment;
+
+            // The true distance, accounting for any repeats
+            double distance = (distanceData?.Distance ?? 0) * repeatCount;
+            // The velocity of the osu! hit object - calculated as the velocity of a slider
+            double osuVelocity = osu_base_scoring_distance * beatmap.BeatmapInfo.Difficulty.SliderMultiplier / speedAdjustedBeatLength;
+            // The duration of the osu! hit object
+            double osuDuration = distance / osuVelocity;
+
+            endTime = hitObject.StartTime + osuDuration;
+            segmentDuration = (endTime - HitObject.StartTime) / repeatCount;
+        }
+
+        public override Pattern Generate()
+        {
+            if (repeatCount > 1)
+            {
+                if (segmentDuration <= 90)
+                    return generateRandomHoldNotes(HitObject.StartTime, 1);
+
+                if (segmentDuration <= 120)
+                {
+                    convertType |= PatternType.ForceNotStack;
+                    return generateRandomNotes(HitObject.StartTime, repeatCount + 1);
+                }
+
+                if (segmentDuration <= 160)
+                    return generateStair(HitObject.StartTime);
+
+                if (segmentDuration <= 200 && ConversionDifficulty > 3)
+                    return generateRandomMultipleNotes(HitObject.StartTime);
+
+                double duration = endTime - HitObject.StartTime;
+                if (duration >= 4000)
+                    return generateNRandomNotes(HitObject.StartTime, 0.23, 0, 0);
+
+                if (segmentDuration > 400 && repeatCount < AvailableColumns - 1 - RandomStart)
+                    return generateTiledHoldNotes(HitObject.StartTime);
+
+                return generateHoldAndNormalNotes(HitObject.StartTime);
+            }
+
+            if (segmentDuration <= 110)
+            {
+                if (PreviousPattern.ColumnWithObjects < AvailableColumns)
+                    convertType |= PatternType.ForceNotStack;
+                else
+                    convertType &= ~PatternType.ForceNotStack;
+                return generateRandomNotes(HitObject.StartTime, segmentDuration < 80 ? 1 : 2);
+            }
+
+            if (ConversionDifficulty > 6.5)
+            {
+                if ((convertType & PatternType.LowProbability) > 0)
+                    return generateNRandomNotes(HitObject.StartTime, 0.78, 0.3, 0);
+                return generateNRandomNotes(HitObject.StartTime, 0.85, 0.36, 0.03);
+            }
+
+            if (ConversionDifficulty > 4)
+            {
+                if ((convertType & PatternType.LowProbability) > 0)
+                    return generateNRandomNotes(HitObject.StartTime, 0.43, 0.08, 0);
+                return generateNRandomNotes(HitObject.StartTime, 0.56, 0.18, 0);
+            }
+
+            if (ConversionDifficulty > 2.5)
+            {
+                if ((convertType & PatternType.LowProbability) > 0)
+                    return generateNRandomNotes(HitObject.StartTime, 0.3, 0, 0);
+                return generateNRandomNotes(HitObject.StartTime, 0.37, 0.08, 0);
+            }
+
+            if ((convertType & PatternType.LowProbability) > 0)
+                return generateNRandomNotes(HitObject.StartTime, 0.17, 0, 0);
+            return generateNRandomNotes(HitObject.StartTime, 0.27, 0, 0);
+        }
+
+        /// <summary>
+        /// Generates random hold notes that start at an span the same amount of rows.
+        /// </summary>
+        /// <param name="startTime">Start time of each hold note.</param>
+        /// <param name="noteCount">Number of hold notes.</param>
+        /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
+        private Pattern generateRandomHoldNotes(double startTime, int noteCount)
+        {
+            // - - - -
+            // ■ - ■ ■
+            // □ - □ □
+            // ■ - ■ ■
+
+            var pattern = new Pattern();
+
+            int usableColumns = AvailableColumns - RandomStart - PreviousPattern.ColumnWithObjects;
+            int nextColumn = Random.Next(RandomStart, AvailableColumns);
+            for (int i = 0; i < Math.Min(usableColumns, noteCount); i++)
+            {
+                while (pattern.ColumnHasObject(nextColumn) || PreviousPattern.ColumnHasObject(nextColumn))  //find available column
+                    nextColumn = Random.Next(RandomStart, AvailableColumns);
+                addToPattern(pattern, nextColumn, startTime, endTime);
+            }
+
+            // This is can't be combined with the above loop due to RNG
+            for (int i = 0; i < noteCount - usableColumns; i++)
+            {
+                while (pattern.ColumnHasObject(nextColumn))
+                    nextColumn = Random.Next(RandomStart, AvailableColumns);
+                addToPattern(pattern, nextColumn, startTime, endTime);
+            }
+
+            return pattern;
+        }
+
+        /// <summary>
+        /// Generates random notes, with one note per row and no stacking.
+        /// </summary>
+        /// <param name="startTime">The start time.</param>
+        /// <param name="noteCount">The number of notes.</param>
+        /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
+        private Pattern generateRandomNotes(double startTime, int noteCount)
+        {
+            // - - - -
+            // x - - -
+            // - - x -
+            // - - - x
+            // x - - -
+
+            var pattern = new Pattern();
+
+            int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
+            if ((convertType & PatternType.ForceNotStack) > 0 && PreviousPattern.ColumnWithObjects < AvailableColumns)
+            {
+                while (PreviousPattern.ColumnHasObject(nextColumn))
+                    nextColumn = Random.Next(RandomStart, AvailableColumns);
+            }
+
+            int lastColumn = nextColumn;
+            for (int i = 0; i < noteCount; i++)
+            {
+                addToPattern(pattern, nextColumn, startTime, startTime);
+                while (nextColumn == lastColumn)
+                    nextColumn = Random.Next(RandomStart, AvailableColumns);
+
+                lastColumn = nextColumn;
+                startTime += segmentDuration;
+            }
+
+            return pattern;
+        }
+
+        /// <summary>
+        /// Generates a stair of notes, with one note per row.
+        /// </summary>
+        /// <param name="startTime">The start time.</param>
+        /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
+        private Pattern generateStair(double startTime)
+        {
+            // - - - -
+            // x - - -
+            // - x - -
+            // - - x -
+            // - - - x
+            // - - x -
+            // - x - -
+            // x - - -
+
+            var pattern = new Pattern();
+
+            int column = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
+            bool increasing = Random.NextDouble() > 0.5;
+
+            for (int i = 0; i <= repeatCount; i++)
+            {
+                addToPattern(pattern, column, startTime, startTime);
+                startTime += segmentDuration;
+
+                // Check if we're at the borders of the stage, and invert the pattern if so
+                if (increasing)
+                {
+                    if (column >= AvailableColumns - 1)
+                    {
+                        increasing = false;
+                        column--;
+                    }
+                    else
+                        column++;
+                }
+                else
+                {
+                    if (column <= RandomStart)
+                    {
+                        increasing = true;
+                        column++;
+                    }
+                    else
+                        column--;
+                }
+            }
+
+            return pattern;
+        }
+
+        /// <summary>
+        /// Generates random notes with 1-2 notes per row and no stacking.
+        /// </summary>
+        /// <param name="startTime">The start time.</param>
+        /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
+        private Pattern generateRandomMultipleNotes(double startTime)
+        {
+            // - - - -
+            // x - - -
+            // - x x -
+            // - - - x
+            // x - x -
+
+            var pattern = new Pattern();
+
+            bool legacy = AvailableColumns >= 4 && AvailableColumns <= 8;
+            int interval = Random.Next(1, AvailableColumns - (legacy ? 1 : 0));
+
+            int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
+            for (int i = 0; i <= repeatCount; i++)
+            {
+                addToPattern(pattern, nextColumn, startTime, startTime);
+
+                nextColumn += interval;
+                if (nextColumn >= AvailableColumns - RandomStart)
+                    nextColumn = nextColumn - AvailableColumns - RandomStart + (legacy ? 1 : 0);
+                nextColumn += RandomStart;
+
+                // If we're in 2K, let's not add many consecutive doubles
+                if (AvailableColumns > 2)
+                    addToPattern(pattern, nextColumn, startTime, startTime);
+
+                nextColumn = Random.Next(RandomStart, AvailableColumns);
+                startTime += segmentDuration;
+            }
+
+            return pattern;
+        }
+
+        /// <summary>
+        /// Generates random hold notes. The amount of hold notes generated is determined by probabilities.
+        /// </summary>
+        /// <param name="startTime">The hold note start time.</param>
+        /// <param name="p2">The probability required for 2 hold notes to be generated.</param>
+        /// <param name="p3">The probability required for 3 hold notes to be generated.</param>
+        /// <param name="p4">The probability required for 4 hold notes to be generated.</param>
+        /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
+        private Pattern generateNRandomNotes(double startTime, double p2, double p3, double p4)
+        {
+            // - - - -
+            // ■ - ■ ■
+            // □ - □ □
+            // ■ - ■ ■
+
+            switch (AvailableColumns)
+            {
+                case 2:
+                    p2 = 0;
+                    p3 = 0;
+                    p4 = 0;
+                    break;
+                case 3:
+                    p2 = Math.Max(p2, 0.1);
+                    p3 = 0;
+                    p4 = 0;
+                    break;
+                case 4:
+                    p2 = Math.Max(p2, 0.3);
+                    p3 = Math.Max(p3, 0.04);
+                    p4 = 0;
+                    break;
+                case 5:
+                    p2 = Math.Max(p2, 0.34);
+                    p3 = Math.Max(p3, 0.1);
+                    p4 = Math.Max(p4, 0.03);
+                    break;
+            }
+
+            Func<SampleInfo, bool> isDoubleSample = sample => sample.Name == SampleInfo.HIT_CLAP && sample.Name == SampleInfo.HIT_FINISH;
+
+            bool canGenerateTwoNotes = (convertType & PatternType.LowProbability) == 0;
+            canGenerateTwoNotes &= HitObject.Samples.Any(isDoubleSample) || sampleInfoListAt(HitObject.StartTime).Any(isDoubleSample);
+
+            if (canGenerateTwoNotes)
+                p2 = 1;
+
+            return generateRandomHoldNotes(startTime, GetRandomNoteCount(p2, p3, p4));
+        }
+
+        /// <summary>
+        /// Generates tiled hold notes. You can think of this as a stair of hold notes.
+        /// </summary>
+        /// <param name="startTime">The first hold note start time.</param>
+        /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
+        private Pattern generateTiledHoldNotes(double startTime)
+        {
+            // - - - -
+            // ■ ■ ■ ■
+            // □ □ □ □
+            // □ □ □ □
+            // □ □ □ ■
+            // □ □ ■ -
+            // □ ■ - -
+            // ■ - - -
+
+            var pattern = new Pattern();
+
+            int columnRepeat = Math.Min(repeatCount, AvailableColumns);
+
+            int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
+            if ((convertType & PatternType.ForceNotStack) > 0 && PreviousPattern.ColumnWithObjects < AvailableColumns)
+            {
+                while (PreviousPattern.ColumnHasObject(nextColumn))
+                    nextColumn = Random.Next(RandomStart, AvailableColumns);
+            }
+
+            for (int i = 0; i < columnRepeat; i++)
+            {
+                while (pattern.ColumnHasObject(nextColumn))
+                    nextColumn = Random.Next(RandomStart, AvailableColumns);
+
+                addToPattern(pattern, nextColumn, startTime, endTime);
+                startTime += segmentDuration;
+            }
+
+            return pattern;
+        }
+
+        /// <summary>
+        /// Generates a hold note alongside normal notes.
+        /// </summary>
+        /// <param name="startTime">The start time of notes.</param>
+        /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
+        private Pattern generateHoldAndNormalNotes(double startTime)
+        {
+            // - - - -
+            // ■ x x -
+            // ■ - x x
+            // ■ x - x
+            // ■ - x x
+
+            var pattern = new Pattern();
+
+            int holdColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
+            if ((convertType & PatternType.ForceNotStack) > 0 && PreviousPattern.ColumnWithObjects < AvailableColumns)
+            {
+                while (PreviousPattern.ColumnHasObject(holdColumn))
+                    holdColumn = Random.Next(RandomStart, AvailableColumns);
+            }
+
+            // Create the hold note
+            addToPattern(pattern, holdColumn, startTime, endTime);
+
+            int noteCount = 1;
+            if (ConversionDifficulty > 6.5)
+                noteCount = GetRandomNoteCount(0.63, 0);
+            else if (ConversionDifficulty > 4)
+                noteCount = GetRandomNoteCount(AvailableColumns < 6 ? 0.12 : 0.45, 0);
+            else if (ConversionDifficulty > 2.5)
+                noteCount = GetRandomNoteCount(AvailableColumns < 6 ? 0 : 0.24, 0);
+            noteCount = Math.Min(AvailableColumns - 1, noteCount);
+
+            bool ignoreHead = !sampleInfoListAt(startTime).Any(s => s.Name == SampleInfo.HIT_WHISTLE || s.Name == SampleInfo.HIT_FINISH || s.Name == SampleInfo.HIT_CLAP);
+            int nextColumn = Random.Next(RandomStart, AvailableColumns);
+
+            var rowPattern = new Pattern();
+            for (int i = 0; i <= repeatCount; i++)
+            {
+                if (!(ignoreHead && startTime == HitObject.StartTime))
+                {
+                    for (int j = 0; j < noteCount; j++)
+                    {
+                        while (rowPattern.ColumnHasObject(nextColumn) || nextColumn == holdColumn)
+                            nextColumn = Random.Next(RandomStart, AvailableColumns);
+                        addToPattern(rowPattern, nextColumn, startTime, startTime);
+                    }
+                }
+
+                pattern.Add(rowPattern);
+                rowPattern.Clear();
+
+                startTime += segmentDuration;
+            }
+
+            return pattern;
+        }
+
+        /// <summary>
+        /// Retrieves the sample info list at a point in time.
+        /// </summary>
+        /// <param name="time">The time to retrieve the sample info list from.</param>
+        /// <returns></returns>
+        private SampleInfoList sampleInfoListAt(double time)
+        {
+            var curveData = HitObject as IHasCurve;
+
+            if (curveData == null)
+                return HitObject.Samples;
+
+            double segmentTime = (endTime - HitObject.StartTime) / repeatCount;
+
+            int index = (int)(segmentTime == 0 ? 0 : (time - HitObject.StartTime) / segmentTime);
+            return curveData.RepeatSamples[index];
+        }
+
+
+        /// <summary>
+        /// Constructs and adds a note to a pattern.
+        /// </summary>
+        /// <param name="pattern">The pattern to add to.</param>
+        /// <param name="column">The column to add the note to.</param>
+        /// <param name="startTime">The start time of the note.</param>
+        /// <param name="endTime">The end time of the note (set to <paramref name="startTime"/> for a non-hold note).</param>
+        private void addToPattern(Pattern pattern, int column, double startTime, double endTime)
+        {
+            ManiaHitObject newObject;
+
+            if (startTime == endTime)
+            {
+                newObject = new Note
+                {
+                    StartTime = startTime,
+                    Samples = sampleInfoListAt(startTime),
+                    Column = column
+                };
+            }
+            else
+            {
+                newObject = new HoldNote
+                {
+                    StartTime = startTime,
+                    Samples = sampleInfoListAt(startTime),
+                    EndSamples = sampleInfoListAt(endTime),
+                    Column = column,
+                    Duration = endTime - startTime
+                };
+            }
+
+            pattern.Add(newObject);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/EndTimeObjectPatternGenerator.cs

@@ -0,0 +1,98 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mania.MathUtils;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using System.Linq;
+using osu.Game.Audio;
+using osu.Game.Rulesets.Mania.Objects;
+
+namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
+{
+    internal class EndTimeObjectPatternGenerator : PatternGenerator
+    {
+        private readonly double endTime;
+
+        public EndTimeObjectPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap)
+            : base(random, hitObject, beatmap, new Pattern())
+        {
+            var endtimeData = HitObject as IHasEndTime;
+
+            endTime = endtimeData?.EndTime ?? 0;
+        }
+
+        public override Pattern Generate()
+        {
+            var pattern = new Pattern();
+
+            bool generateHold = endTime - HitObject.StartTime >= 100;
+
+            if (AvailableColumns == 8)
+            {
+                if (HitObject.Samples.Any(s => s.Name == SampleInfo.HIT_FINISH) && endTime - HitObject.StartTime < 1000)
+                    addToPattern(pattern, 0, generateHold);
+                else
+                    addToPattern(pattern, getNextRandomColumn(RandomStart), generateHold);
+            }
+            else if (AvailableColumns > 0)
+                addToPattern(pattern, getNextRandomColumn(0), generateHold);
+
+            return pattern;
+        }
+
+        /// <summary>
+        /// Picks a random column after a column.
+        /// </summary>
+        /// <param name="start">The starting column.</param>
+        /// <returns>A random column after <paramref name="start"/>.</returns>
+        private int getNextRandomColumn(int start)
+        {
+            int nextColumn = Random.Next(start, AvailableColumns);
+
+            while (PreviousPattern.ColumnHasObject(nextColumn))
+                nextColumn = Random.Next(start, AvailableColumns);
+
+            return nextColumn;
+        }
+
+        /// <summary>
+        /// Constructs and adds a note to a pattern.
+        /// </summary>
+        /// <param name="pattern">The pattern to add to.</param>
+        /// <param name="column">The column to add the note to.</param>
+        /// <param name="holdNote">Whether to add a hold note.</param>
+        private void addToPattern(Pattern pattern, int column, bool holdNote)
+        {
+            ManiaHitObject newObject;
+
+            if (holdNote)
+            {
+                newObject = new HoldNote
+                {
+                    StartTime = HitObject.StartTime,
+                    EndSamples = HitObject.Samples,
+                    Column = column,
+                    Duration = endTime - HitObject.StartTime
+                };
+
+                newObject.Samples.Add(new SampleInfo
+                {
+                    Name = SampleInfo.HIT_NORMAL
+                });
+            }
+            else
+            {
+                newObject = new Note
+                {
+                    StartTime = HitObject.StartTime,
+                    Samples = HitObject.Samples,
+                    Column = column
+                };
+            }
+
+            pattern.Add(newObject);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/PatternGenerator.cs

@@ -90,7 +90,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 HitObject firstObject = Beatmap.HitObjects.FirstOrDefault();
 
                 double drainTime = (lastObject?.StartTime ?? 0) - (firstObject?.StartTime ?? 0);
-                drainTime -= Beatmap.EventInfo.TotalBreakTime;
+                drainTime -= Beatmap.TotalBreakTime;
 
                 if (drainTime == 0)
                     drainTime = 10000;

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/PatternType.cs

@@ -15,51 +15,51 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// <summary>
         /// Keep the same as last row.
         /// </summary>
-        ForceStack = 1,
+        ForceStack = 1 << 0,
         /// <summary>
         /// Keep different from last row.
         /// </summary>
-        ForceNotStack = 2,
+        ForceNotStack = 1 << 1,
         /// <summary>
         /// Keep as single note at its original position.
         /// </summary>
-        KeepSingle = 4,
+        KeepSingle = 1 << 2,
         /// <summary>
         /// Use a lower random value.
         /// </summary>
-        LowProbability = 8,
+        LowProbability = 1 << 3,
         /// <summary>
         /// Reserved.
         /// </summary>
-        Alternate = 16,
+        Alternate = 1 << 4,
         /// <summary>
         /// Ignore the repeat count.
         /// </summary>
-        ForceSigSlider = 32,
+        ForceSigSlider = 1 << 5,
         /// <summary>
         /// Convert slider to circle.
         /// </summary>
-        ForceNotSlider = 64,
+        ForceNotSlider = 1 << 6,
         /// <summary>
         /// Notes gathered together.
         /// </summary>
-        Gathered = 128,
+        Gathered = 1 << 7,
-        Mirror = 256,
+        Mirror = 1 << 8,
         /// <summary>
         /// Change 0 -> 6.
         /// </summary>
-        Reverse = 512,
+        Reverse = 1 << 9,
         /// <summary>
         /// 1 -> 5 -> 1 -> 5 like reverse.
         /// </summary>
-        Cycle = 1024,
+        Cycle = 1 << 10,
         /// <summary>
         /// Next note will be at column + 1.
         /// </summary>
-        Stair = 2048,
+        Stair = 1 << 11,
         /// <summary>
         /// Next note will be at column - 1.
         /// </summary>
-        ReverseStair = 4096
+        ReverseStair = 1 << 12
     }
 }

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Pattern.cs

@@ -3,7 +3,6 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Game.Rulesets.Mania.Objects;
 
 namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
@@ -21,16 +20,16 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
         public IEnumerable<ManiaHitObject> HitObjects => hitObjects;
 
         /// <summary>
-        /// Whether this pattern already contains a hit object in a code.
+        /// Check whether a column of this patterns contains a hit object.
         /// </summary>
         /// <param name="column">The column index.</param>
-        /// <returns>Whether this pattern already contains a hit object in <paramref name="column"/></returns>
+        /// <returns>Whether the column with index <paramref name="column"/> contains a hit object.</returns>
-        public bool IsFilled(int column) => hitObjects.Exists(h => h.Column == column);
+        public bool ColumnHasObject(int column) => hitObjects.Exists(h => h.Column == column);
 
         /// <summary>
         /// Amount of columns taken up by hit objects in this pattern.
         /// </summary>
-        public int ColumnsFilled => HitObjects.GroupBy(h => h.Column).Count();
+        public int ColumnWithObjects => HitObjects.GroupBy(h => h.Column).Count();
 
         /// <summary>
         /// Adds a hit object to this pattern.
@@ -42,10 +41,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
         /// Copies hit object from another pattern to this one.
         /// </summary>
         /// <param name="other">The other pattern.</param>
-        public void Add(Pattern other)
+        public void Add(Pattern other) => hitObjects.AddRange(other.HitObjects);
-        {
-            other.HitObjects.ForEach(Add);
-        }
 
         /// <summary>
         /// Clears this pattern, removing all hit objects.

osu.Game.Rulesets.Mania/Objects/HoldNote.cs

@@ -1,6 +1,7 @@
 // Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Game.Audio;
 using osu.Game.Beatmaps.Timing;
 using osu.Game.Database;
 using osu.Game.Rulesets.Mania.Judgements;
@@ -22,6 +23,11 @@ namespace osu.Game.Rulesets.Mania.Objects
         public double Duration { get; set; }
         public double EndTime => StartTime + Duration;
 
+        /// <summary>
+        /// The samples to be played when this hold note is released.
+        /// </summary>
+        public SampleInfoList EndSamples = new SampleInfoList();
+
         /// <summary>
         /// The key-release hit windows for this hold note.
         /// </summary>

osu.Game.Rulesets.Mania/Objects/ManiaHitObject.cs

@@ -9,11 +9,5 @@ namespace osu.Game.Rulesets.Mania.Objects
     public abstract class ManiaHitObject : HitObject, IHasColumn
     {
         public int Column { get; set; }
-
-        /// <summary>
-        /// The number of other <see cref="ManiaHitObject"/> that start at
-        /// the same time as this hit object.
-        /// </summary>
-        public int Siblings { get; set; }
     }
 }

osu.Game.Rulesets.Mania/Timing/ControlPointContainer.cs

@@ -51,7 +51,7 @@ namespace osu.Game.Rulesets.Mania.Timing
             var controlPoint = drawableControlPoints.LastOrDefault(t => t.CanContain(drawable)) ?? drawableControlPoints.FirstOrDefault();
 
             if (controlPoint == null)
-                throw new Exception("Could not find suitable timing section to add object to.");
+                throw new InvalidOperationException("Could not find suitable timing section to add object to.");
 
             controlPoint.Add(drawable);
         }

osu.Game.Rulesets.Mania/UI/ManiaHitRenderer.cs

@@ -34,7 +34,7 @@ namespace osu.Game.Rulesets.Mania.UI
             ControlPoint firstTimingChange = Beatmap.TimingInfo.ControlPoints.FirstOrDefault(t => t.TimingChange);
 
             if (firstTimingChange == null)
-                throw new Exception("The Beatmap contains no timing points!");
+                throw new InvalidOperationException("The Beatmap contains no timing points!");
 
             // Generate the timing points, making non-timing changes use the previous timing change
             var timingChanges = Beatmap.TimingInfo.ControlPoints.Select(c =>

osu.Game.Rulesets.Mania/osu.Game.Rulesets.Mania.csproj

@@ -47,6 +47,8 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Beatmaps\Patterns\Legacy\EndTimeObjectPatternGenerator.cs" />
+    <Compile Include="Beatmaps\Patterns\Legacy\DistanceObjectPatternGenerator.cs" />
     <Compile Include="Beatmaps\Patterns\Legacy\PatternGenerator.cs" />
     <Compile Include="Beatmaps\Patterns\PatternGenerator.cs" />
     <Compile Include="Beatmaps\Patterns\Legacy\PatternType.cs" />

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSpinner.cs

@@ -30,6 +30,9 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
         private readonly TextAwesome symbol;
 
+        private readonly Color4 baseColour = OsuColour.FromHex(@"002c3c");
+        private readonly Color4 fillColour = OsuColour.FromHex(@"005b7c");
+
         private Color4 normalColour;
         private Color4 completeColour;
 
@@ -154,13 +157,13 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
-            normalColour = colours.SpinnerBase;
+            normalColour = baseColour;
 
             background.AccentColour = normalColour;
 
-            completeColour = colours.YellowLight.Opacity(0.6f);
+            completeColour = colours.YellowLight.Opacity(0.75f);
 
-            disc.AccentColour = colours.SpinnerFill;
+            disc.AccentColour = fillColour;
             circle.Colour = colours.BlueDark;
             glow.Colour = colours.BlueDark;
         }

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SpinnerBackground.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using OpenTK.Graphics;
-using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
@@ -28,9 +27,10 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 
                 EdgeEffect = new EdgeEffect
                 {
+                    Hollow = true,
                     Type = EdgeEffectType.Glow,
-                    Radius = 14,
+                    Radius = 40,
-                    Colour = value.Opacity(0.3f),
+                    Colour = value,
                 };
             }
         }

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SpinnerDisc.cs

@@ -127,7 +127,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
             if (Complete && updateCompleteTick())
             {
                 background.Flush(flushType: typeof(TransformAlpha));
-                background.FadeTo(tracking_alpha + 0.4f, 60, EasingTypes.OutExpo);
+                background.FadeTo(tracking_alpha + 0.2f, 60, EasingTypes.OutExpo);
                 background.Delay(60);
                 background.FadeTo(tracking_alpha, 250, EasingTypes.OutQuint);
             }

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SpinnerTicks.cs

@@ -2,12 +2,10 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
-using osu.Framework.Allocation;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
-using osu.Game.Graphics;
 using OpenTK;
 using OpenTK.Graphics;
 
@@ -15,24 +13,12 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 {
     public class SpinnerTicks : Container
     {
-        private Color4 glowColour;
-
         public SpinnerTicks()
         {
             Origin = Anchor.Centre;
             Anchor = Anchor.Centre;
             RelativeSizeAxes = Axes.Both;
-        }
 
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colours)
-        {
-            glowColour = colours.BlueDarker.Opacity(0.4f);
-            layout();
-        }
-
-        private void layout()
-        {
             const int count = 18;
 
             for (int i = 0; i < count; i++)
@@ -44,8 +30,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
                     EdgeEffect = new EdgeEffect
                     {
                         Type = EdgeEffectType.Glow,
-                        Radius = 20,
+                        Radius = 10,
-                        Colour = glowColour,
+                        Colour = Color4.Gray.Opacity(0.2f),
                     },
                     RelativePositionAxes = Axes.Both,
                     Masking = true,

osu.Game/Beatmaps/Beatmap.cs

@@ -2,11 +2,11 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using OpenTK.Graphics;
-using osu.Game.Beatmaps.Events;
 using osu.Game.Beatmaps.Timing;
 using osu.Game.Database;
 using osu.Game.Rulesets.Objects;
 using System.Collections.Generic;
+using System.Linq;
 
 namespace osu.Game.Beatmaps
 {
@@ -18,7 +18,7 @@ namespace osu.Game.Beatmaps
     {
         public BeatmapInfo BeatmapInfo;
         public TimingInfo TimingInfo = new TimingInfo();
-        public EventInfo EventInfo = new EventInfo();
+        public List<BreakPeriod> Breaks = new List<BreakPeriod>();
         public readonly List<Color4> ComboColors = new List<Color4>
         {
             new Color4(17, 136, 170, 255),
@@ -34,6 +34,11 @@ namespace osu.Game.Beatmaps
         /// </summary>
         public List<T> HitObjects;
 
+        /// <summary>
+        /// Total amount of break time in the beatmap.
+        /// </summary>
+        public double TotalBreakTime => Breaks.Sum(b => b.Duration);
+
         /// <summary>
         /// Constructs a new beatmap.
         /// </summary>
@@ -42,7 +47,7 @@ namespace osu.Game.Beatmaps
         {
             BeatmapInfo = original?.BeatmapInfo ?? BeatmapInfo;
             TimingInfo = original?.TimingInfo ?? TimingInfo;
-            EventInfo = original?.EventInfo ?? EventInfo;
+            Breaks = original?.Breaks ?? Breaks;
             ComboColors = original?.ComboColors ?? ComboColors;
         }
     }

osu.Game/Beatmaps/Events/BackgroundEvent.cs

@@ -1,13 +0,0 @@
-// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
-// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
-
-namespace osu.Game.Beatmaps.Events
-{
-    public class BackgroundEvent : Event
-    {
-        /// <summary>
-        /// The file name.
-        /// </summary>
-        public string Filename;
-    }
-}

osu.Game/Beatmaps/Events/Event.cs

@@ -1,13 +0,0 @@
-// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
-// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
-
-namespace osu.Game.Beatmaps.Events
-{
-    public abstract class Event
-    {
-        /// <summary>
-        /// The event start time.
-        /// </summary>
-        public double StartTime;
-    }
-}

osu.Game/Beatmaps/Events/EventInfo.cs

@@ -1,33 +0,0 @@
-// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
-// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
-
-using System.Collections.Generic;
-using System.Linq;
-
-namespace osu.Game.Beatmaps.Events
-{
-    public class EventInfo
-    {
-        /// <summary>
-        /// All the background events.
-        /// </summary>
-        public readonly List<BackgroundEvent> Backgrounds = new List<BackgroundEvent>();
-
-        /// <summary>
-        /// All the break events.
-        /// </summary>
-        public readonly List<BreakEvent> Breaks = new List<BreakEvent>();
-
-        /// <summary>
-        /// Total duration of all breaks.
-        /// </summary>
-        public double TotalBreakTime => Breaks.Sum(b => b.Duration);
-
-        /// <summary>
-        /// Retrieves the active background at a time.
-        /// </summary>
-        /// <param name="time">The time to retrieve the background at.</param>
-        /// <returns>The background.</returns>
-        public BackgroundEvent BackgroundAt(double time) => Backgrounds.FirstOrDefault(b => b.StartTime <= time);
-    }
-}

osu.Game/Beatmaps/Formats/OsuLegacyDecoder.cs

@@ -5,7 +5,6 @@ using System;
 using System.Globalization;
 using System.IO;
 using OpenTK.Graphics;
-using osu.Game.Beatmaps.Events;
 using osu.Game.Beatmaps.Timing;
 using osu.Game.Beatmaps.Legacy;
 using osu.Game.Rulesets.Objects.Legacy;
@@ -217,18 +216,12 @@ namespace osu.Game.Beatmaps.Formats
                 case EventType.Background:
                     string filename = split[2].Trim('"');
 
-                    beatmap.EventInfo.Backgrounds.Add(new BackgroundEvent
-                    {
-                        StartTime = double.Parse(split[1], NumberFormatInfo.InvariantInfo),
-                        Filename = filename
-                    });
-
                     if (type == EventType.Background)
                         beatmap.BeatmapInfo.Metadata.BackgroundFile = filename;
 
                     break;
                 case EventType.Break:
-                    var breakEvent = new BreakEvent
+                    var breakEvent = new BreakPeriod
                     {
                         StartTime = double.Parse(split[1], NumberFormatInfo.InvariantInfo),
                         EndTime = double.Parse(split[2], NumberFormatInfo.InvariantInfo)
@@ -237,7 +230,7 @@ namespace osu.Game.Beatmaps.Formats
                     if (!breakEvent.HasEffect)
                         return;
 
-                    beatmap.EventInfo.Breaks.Add(breakEvent);
+                    beatmap.Breaks.Add(breakEvent);
                     break;
             }
         }

osu.Game/Beatmaps/Timing/BreakPeriod.cs

@@ -1,27 +1,32 @@
 // Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-namespace osu.Game.Beatmaps.Events
+namespace osu.Game.Beatmaps.Timing
 {
-    public class BreakEvent : Event
+    public class BreakPeriod
     {
         /// <summary>
         /// The minimum duration required for a break to have any effect.
         /// </summary>
         private const double min_break_duration = 650;
 
+        /// <summary>
+        /// The break start time.
+        /// </summary>
+        public double StartTime;
+
         /// <summary>
         /// The break end time.
         /// </summary>
         public double EndTime;
 
         /// <summary>
-        /// The duration of the break.
+        /// The break duration.
         /// </summary>
         public double Duration => EndTime - StartTime;
 
         /// <summary>
-        /// Whether the break has any effect. Breaks that are too short are culled before they reach the EventInfo.
+        /// Whether the break has any effect. Breaks that are too short are culled before they are added to the beatmap.
         /// </summary>
         public bool HasEffect => Duration >= min_break_duration;
     }

osu.Game/Graphics/OsuColour.cs

@@ -87,8 +87,5 @@ namespace osu.Game.Graphics
         public readonly Color4 RedDarker = FromHex(@"870000");
 
         public readonly Color4 ChatBlue = FromHex(@"17292e");
-
-        public readonly Color4 SpinnerBase = FromHex(@"002c3c");
-        public readonly Color4 SpinnerFill = FromHex(@"005b7c");
     }
 }

osu.Game/Online/API/APIAccess.cs

@@ -288,7 +288,7 @@ namespace osu.Game.Online.API
             {
                 APIRequest req;
                 while (oldQueue.TryDequeue(out req))
-                    req.Fail(new Exception(@"Disconnected from server"));
+                    req.Fail(new WebException(@"Disconnected from server"));
             }
         }
 

osu.Game/Online/API/Requests/GetMessagesRequest.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System.Collections.Generic;
+using System.Linq;
 using osu.Framework.IO.Network;
 using osu.Game.Online.Chat;
 
@@ -20,10 +21,7 @@ namespace osu.Game.Online.API.Requests
 
         protected override WebRequest CreateWebRequest()
         {
-            string channelString = string.Empty;
+            string channelString = string.Join(",", channels.Select(x => x.Id));
-            foreach (Channel c in channels)
-                channelString += c.Id + ",";
-            channelString = channelString.TrimEnd(',');
 
             var req = base.CreateWebRequest();
             req.AddParameter(@"channels", channelString);

osu.Game/Online/Chat/Channel.cs

@@ -23,7 +23,7 @@ namespace osu.Game.Online.Chat
         [JsonProperty(@"channel_id")]
         public int Id;
 
-        public readonly SortedList<Message> Messages = new SortedList<Message>((m1, m2) => m1.Id.CompareTo(m2.Id));
+        public readonly SortedList<Message> Messages = new SortedList<Message>(Comparer<Message>.Default);
 
         //internal bool Joined;
 

osu.Game/Online/Chat/Message.cs

@@ -8,7 +8,7 @@ using osu.Game.Users;
 
 namespace osu.Game.Online.Chat
 {
-    public class Message
+    public class Message : IComparable<Message>, IEquatable<Message>
     {
         [JsonProperty(@"message_id")]
         public readonly long Id;
@@ -42,17 +42,11 @@ namespace osu.Game.Online.Chat
             Id = id;
         }
 
-        public override bool Equals(object obj)
+        public int CompareTo(Message other) => Id.CompareTo(other.Id);
-        {
-            var objMessage = obj as Message;
 
-            return Id == objMessage?.Id;
+        public bool Equals(Message other) => Id == other?.Id;
-        }
 
-        public override int GetHashCode()
+        public override int GetHashCode() => Id.GetHashCode();
-        {
-            return Id.GetHashCode();
-        }
     }
 
     public enum TargetType

osu.Game/Overlays/Chat/DrawableChannel.cs

@@ -13,7 +13,7 @@ namespace osu.Game.Overlays.Chat
     public class DrawableChannel : Container
     {
         public readonly Channel Channel;
-        private readonly FillFlowContainer flow;
+        private readonly FillFlowContainer<ChatLine> flow;
         private readonly ScrollContainer scroll;
 
         public DrawableChannel(Channel channel)
@@ -29,7 +29,7 @@ namespace osu.Game.Overlays.Chat
                     RelativeSizeAxes = Axes.Both,
                     Children = new Drawable[]
                     {
-                        flow = new FillFlowContainer
+                        flow = new FillFlowContainer<ChatLine>
                         {
                             Direction = FillDirection.Vertical,
                             RelativeSizeAxes = Axes.X,
@@ -63,19 +63,18 @@ namespace osu.Game.Overlays.Chat
 
             var displayMessages = newMessages.Skip(Math.Max(0, newMessages.Count() - Channel.MAX_HISTORY));
 
+            //up to last Channel.MAX_HISTORY messages
+            flow.Add(displayMessages.Select(m => new ChatLine(m)));
+
             if (scroll.IsScrolledToEnd(10) || !flow.Children.Any())
                 scrollToEnd();
 
-            //up to last Channel.MAX_HISTORY messages
+            var staleMessages = flow.Children.Where(c => c.LifetimeEnd == double.MaxValue).ToArray();
-            foreach (Message m in displayMessages)
+            int count = staleMessages.Length - Channel.MAX_HISTORY;
-            {
-                var d = new ChatLine(m);
-                flow.Add(d);
-            }
 
-            while (flow.Children.Count(c => c.LifetimeEnd == double.MaxValue) > Channel.MAX_HISTORY)
+            for (int i = 0; i < count; i++)
             {
-                var d = flow.Children.First(c => c.LifetimeEnd == double.MaxValue);
+                var d = staleMessages[i];
                 if (!scroll.IsScrolledToEnd(10))
                     scroll.OffsetScrollPosition(-d.DrawHeight);
                 d.Expire();

osu.Game/Overlays/ChatOverlay.cs

@@ -229,6 +229,7 @@ namespace osu.Game.Overlays
                 Scheduler.Add(delegate
                 {
                     loading.FadeOut(100);
+                    loading.Expire();
 
                     addChannel(channels.Find(c => c.Name == @"#lazer"));
                     addChannel(channels.Find(c => c.Name == @"#osu"));
@@ -320,11 +321,8 @@ namespace osu.Game.Overlays
             fetchReq = new GetMessagesRequest(careChannels, lastMessageId);
             fetchReq.Success += delegate (List<Message> messages)
             {
-                var ids = messages.Where(m => m.TargetType == TargetType.Channel).Select(m => m.TargetId).Distinct();
+                foreach (var group in messages.Where(m => m.TargetType == TargetType.Channel).GroupBy(m => m.TargetId))
-
+                    careChannels.Find(c => c.Id == group.Key)?.AddNewMessages(group.ToArray());
-                //batch messages per channel.
-                foreach (var id in ids)
-                    careChannels.Find(c => c.Id == id)?.AddNewMessages(messages.Where(m => m.TargetId == id).ToArray());
 
                 lastMessageId = messages.LastOrDefault()?.Id ?? lastMessageId;
 

osu.Game/Screens/OsuScreen.cs

@@ -57,12 +57,17 @@ namespace osu.Game.Screens
                     beatmap.Value = localMap;
             }
 
-            beatmap.ValueChanged += OnBeatmapChanged;
-
             if (osuGame != null)
                 ruleset.BindTo(osuGame.Ruleset);
         }
 
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            beatmap.ValueChanged += OnBeatmapChanged;
+        }
+
         /// <summary>
         /// The global Beatmap was changed.
         /// </summary>

osu.Game/Screens/Play/Player.cs

@@ -150,7 +150,7 @@ namespace osu.Game.Screens.Play
                     FramedClock = offsetClock,
                     OnRetry = Restart,
                     OnQuit = Exit,
-                    CheckCanPause = () => ValidForResume && !HasFailed,
+                    CheckCanPause = () => ValidForResume && !HasFailed && !HitRenderer.HasReplayLoaded,
                     Retries = RestartCount,
                     OnPause = () => {
                         hudOverlay.KeyCounter.IsCounting = pauseContainer.IsPaused;

osu.Game/Screens/Select/BeatmapCarousel.cs

@@ -155,7 +155,11 @@ namespace osu.Game.Screens.Select
                 index = (index + direction + groups.Count) % groups.Count;
                 if (groups[index].State != BeatmapGroupState.Hidden)
                 {
-                    SelectBeatmap(groups[index].BeatmapPanels.First().Beatmap);
+                    if (skipDifficulties)
+                        SelectBeatmap(groups[index].SelectedPanel != null ? groups[index].SelectedPanel.Beatmap : groups[index].BeatmapPanels.First().Beatmap);
+                    else
+                        SelectBeatmap(direction == 1 ? groups[index].BeatmapPanels.First().Beatmap : groups[index].BeatmapPanels.Last().Beatmap);
+
                     return;
                 }
             } while (index != startIndex);
@@ -167,10 +171,8 @@ namespace osu.Game.Screens.Select
             if (visibleGroups.Count < 1)
                 return;
             BeatmapGroup group = visibleGroups[RNG.Next(visibleGroups.Count)];
-            BeatmapPanel panel = group?.BeatmapPanels.First();
 
-            if (panel == null)
+            BeatmapPanel panel = group.BeatmapPanels[RNG.Next(group.BeatmapPanels.Count)];
-                return;
 
             selectGroup(group, panel);
         }
@@ -409,7 +411,14 @@ namespace osu.Game.Screens.Select
             int firstIndex = yPositions.BinarySearch(Current - Panel.MAX_HEIGHT);
             if (firstIndex < 0) firstIndex = ~firstIndex;
             int lastIndex = yPositions.BinarySearch(Current + drawHeight);
-            if (lastIndex < 0) lastIndex = ~lastIndex;
+            if (lastIndex < 0)
+            {
+                lastIndex = ~lastIndex;
+
+                // Add the first panel of the last visible beatmap group to preload its data.
+                if (lastIndex != 0 && panels[lastIndex - 1] is BeatmapSetHeader)
+                    lastIndex++;
+            }
 
             // Add those panels within the previously found index range that should be displayed.
             for (int i = firstIndex; i < lastIndex; ++i)

osu.Game/Screens/Select/Footer.cs

@@ -9,6 +9,7 @@ using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Input;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Screens.Menu;
 
@@ -68,8 +69,6 @@ namespace osu.Game.Screens.Select
 
         public Footer()
         {
-            AlwaysReceiveInput = true;
-
             RelativeSizeAxes = Axes.X;
             Height = HEIGHT;
             Anchor = Anchor.BottomCentre;
@@ -124,5 +123,13 @@ namespace osu.Game.Screens.Select
 
             updateModeLight();
         }
+
+        protected override bool InternalContains(Vector2 screenSpacePos) => base.InternalContains(screenSpacePos) || StartButton.Contains(screenSpacePos);
+
+        protected override bool OnMouseDown(InputState state, MouseDownEventArgs args) => true;
+
+        protected override bool OnClick(InputState state) => true;
+
+        protected override bool OnDragStart(InputState state) => true;
     }
 }

osu.Game/Screens/Select/PlaySongSelect.cs

@@ -57,14 +57,23 @@ namespace osu.Game.Screens.Select
         {
             beatmap?.Mods.BindTo(modSelect.SelectedMods);
 
+            if (Beatmap?.Track != null)
+                Beatmap.Track.Looping = false;
+
             beatmapDetails.Beatmap = beatmap;
 
+            if (beatmap?.Track != null)
+                beatmap.Track.Looping = true;
+
             base.OnBeatmapChanged(beatmap);
         }
 
         protected override void OnResuming(Screen last)
         {
             player = null;
+
+            Beatmap.Track.Looping = true;
+
             base.OnResuming(last);
         }
 
@@ -83,13 +92,21 @@ namespace osu.Game.Screens.Select
                 return true;
             }
 
-            return base.OnExiting(next);
+            if (base.OnExiting(next))
+                return true;
+
+            if (Beatmap?.Track != null)
+                Beatmap.Track.Looping = false;
+
+            return false;
         }
 
         protected override void OnSelected()
         {
             if (player != null) return;
 
+            Beatmap.Track.Looping = false;
+
             LoadComponentAsync(player = new PlayerLoader(new Player
             {
                 Beatmap = Beatmap, //eagerly set this so it's present before push.

osu.Game/Screens/Select/SongSelect.cs

@@ -229,6 +229,8 @@ namespace osu.Game.Screens.Select
 
             changeBackground(Beatmap);
 
+            selectionChangeNoBounce = Beatmap?.BeatmapInfo;
+
             Content.FadeInFromZero(250);
 
             beatmapInfoWedge.State = Visibility.Visible;

osu.Game/osu.Game.csproj

@@ -74,10 +74,6 @@
     <Compile Include="Audio\SampleInfoList.cs" />
     <Compile Include="Beatmaps\Drawables\BeatmapBackgroundSprite.cs" />
     <Compile Include="Beatmaps\DifficultyCalculator.cs" />
-    <Compile Include="Beatmaps\Events\BackgroundEvent.cs" />
-    <Compile Include="Beatmaps\Events\BreakEvent.cs" />
-    <Compile Include="Beatmaps\Events\Event.cs" />
-    <Compile Include="Beatmaps\Events\EventInfo.cs" />
     <Compile Include="Online\API\Requests\PostMessageRequest.cs" />
     <Compile Include="Online\Chat\ErrorMessage.cs" />
     <Compile Include="Overlays\Chat\ChatTabControl.cs" />
@@ -92,6 +88,7 @@
     <Compile Include="Rulesets\Beatmaps\BeatmapConverter.cs" />
     <Compile Include="Rulesets\Beatmaps\BeatmapProcessor.cs" />
     <Compile Include="Beatmaps\Legacy\LegacyBeatmap.cs" />
+    <Compile Include="Beatmaps\Timing\BreakPeriod.cs" />
     <Compile Include="Beatmaps\Timing\TimeSignatures.cs" />
     <Compile Include="Beatmaps\Timing\TimingInfo.cs" />
     <Compile Include="Database\BeatmapMetrics.cs" />
@@ -431,11 +428,11 @@
     <Compile Include="Rulesets\Replays\AutoGenerator.cs" />
   </ItemGroup>
   <ItemGroup>
-    <ProjectReference Include="$(SolutionDir)\osu-framework\osu.Framework\osu.Framework.csproj">
+    <ProjectReference Include="..\osu-framework\osu.Framework\osu.Framework.csproj">
       <Project>{c76bf5b3-985e-4d39-95fe-97c9c879b83a}</Project>
       <Name>osu.Framework</Name>
     </ProjectReference>
-    <ProjectReference Include="$(SolutionDir)\osu-resources\osu.Game.Resources\osu.Game.Resources.csproj">
+    <ProjectReference Include="..\osu-resources\osu.Game.Resources\osu.Game.Resources.csproj">
       <Project>{d9a367c9-4c1a-489f-9b05-a0cea2b53b58}</Project>
       <Name>osu.Game.Resources</Name>
     </ProjectReference>