Merge pull request #113 from peppy/lets-play

Let's play

osu-framework

@@ -1 +1 @@
-Subproject commit 13af08782cfb4de054b2fb11a2cf8311ff895949
+Subproject commit dd9faf46095a761558abc6cb11ecd0e7498dba4e

osu.Desktop.VisualTests/Tests/TestCasePlayer.cs

@@ -44,11 +44,14 @@ namespace osu.Desktop.VisualTests.Tests
                 time += 500;
             }
 
-            Add(new Player()
+            Add(new Player
             {
-                Beatmap = new Beatmap
+                Beatmap = new WorkingBeatmap
                 {
-                    HitObjects = objects
+                    Beatmap = new Beatmap
+                    {
+                        HitObjects = objects
+                    }
                 }
             });
         }

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

@@ -15,7 +15,7 @@ namespace osu.Game.Tests.Beatmaps.Formats
     [TestFixture]
     public class OsuLegacyDecoderTest
     {
-        [TestFixtureSetUp]
+        [OneTimeSetUpAttribute]
         public void SetUp()
         {
             OsuLegacyDecoder.Register();

osu.Game.Tests/Beatmaps/IO/OszArchiveReaderTest.cs

@@ -10,7 +10,7 @@ namespace osu.Game.Tests.Beatmaps.IO
     [TestFixture]
     public class OszArchiveReaderTest
     {
-        [TestFixtureSetUp]
+        [OneTimeSetUpAttribute]
         public void SetUp()
         {
             OszArchiveReader.Register();

osu.Game.Tests/osu.Game.Tests.csproj

@@ -33,7 +33,7 @@
     </Reference>
     <Reference Include="System" />
     <Reference Include="nunit.framework">
-      <HintPath>$(SolutionDir)\packages\NUnit.2.6.4\lib\nunit.framework.dll</HintPath>
+      <HintPath>$(SolutionDir)\packages\NUnit.3.5.0\lib\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="OpenTK, Version=2.0.0.0, Culture=neutral, PublicKeyToken=bad199fe84eb3df4, processorArchitecture=MSIL">
       <HintPath>$(SolutionDir)\packages\ppy.OpenTK.2.0.50727.1339\lib\net45\OpenTK.dll</HintPath>

osu.Game/Beatmaps/Beatmap.cs

@@ -1,7 +1,6 @@
 //Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
 //Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using System;
 using System.Collections.Generic;
 using OpenTK.Graphics;
 using osu.Game.Beatmaps.Objects;
@@ -13,6 +12,7 @@ namespace osu.Game.Beatmaps
     public class Beatmap
     {
         public BeatmapInfo BeatmapInfo { get; set; }
+        public BeatmapMetadata Metadata => BeatmapInfo?.Metadata ?? BeatmapInfo?.BeatmapSet?.Metadata;
         public List<HitObject> HitObjects { get; set; }
         public List<ControlPoint> ControlPoints { get; set; }
         public List<Color4> ComboColors { get; set; }

osu.Game/Beatmaps/Drawable/BeatmapGroup.cs

@@ -2,6 +2,7 @@
 //Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using osu.Framework;
 using osu.Framework.Graphics;
@@ -27,6 +28,8 @@ namespace osu.Game.Beatmaps.Drawable
 
         private BeatmapGroupState state;
 
+        public List<BeatmapPanel> BeatmapPanels;
+
         public BeatmapGroupState State
         {
             get { return state; }
@@ -40,9 +43,6 @@ namespace osu.Game.Beatmaps.Drawable
                         difficulties.Show();
 
                         header.State = PanelSelectedState.Selected;
-
-                        if (SelectedPanel == null)
-                            ((BeatmapPanel)difficulties.Children.FirstOrDefault()).State = PanelSelectedState.Selected;
                         break;
                     case BeatmapGroupState.Collapsed:
                         FadeTo(0.5f, 250);
@@ -62,6 +62,16 @@ namespace osu.Game.Beatmaps.Drawable
             AutoSizeAxes = Axes.Y;
             RelativeSizeAxes = Axes.X;
 
+            BeatmapPanels = beatmapSet.Beatmaps.Select(b =>
+                new BeatmapPanel(b)
+                {
+                    GainedSelection = panelGainedSelection,
+                    Anchor = Anchor.TopRight,
+                    Origin = Anchor.TopRight,
+                    RelativeSizeAxes = Axes.X,
+                }).ToList();
+                
+
             Children = new[]
             {
                 new FlowContainer
@@ -87,15 +97,7 @@ namespace osu.Game.Beatmaps.Drawable
                             Spacing = new Vector2(0, 5),
                             Direction = FlowDirection.VerticalOnly,
                             Alpha = 0,
-                            Children = this.beatmapSet.Beatmaps.Select(b =>
-                                new BeatmapPanel(this.beatmapSet, b)
-                                {
-                                    GainedSelection = panelGainedSelection,
-                                    Anchor = Anchor.TopRight,
-                                    Origin = Anchor.TopRight,
-                                    RelativeSizeAxes = Axes.X,
-                                }
-                            )
+                            Children = BeatmapPanels
                         }
                     }
                 }
@@ -112,17 +114,28 @@ namespace osu.Game.Beatmaps.Drawable
         {
             State = BeatmapGroupState.Expanded;
 
-            SelectionChanged?.Invoke(this, SelectedPanel.Beatmap);
+            //we want to make sure one of our children is selected in the case none have been selected yet.
+            if (SelectedPanel == null)
+                BeatmapPanels.First().State = PanelSelectedState.Selected;
+            else
+                SelectionChanged?.Invoke(this, SelectedPanel.Beatmap);
         }
 
         private void panelGainedSelection(BeatmapPanel panel)
         {
-            State = BeatmapGroupState.Expanded;
-
-            if (SelectedPanel != null) SelectedPanel.State = PanelSelectedState.NotSelected;
-            SelectedPanel = panel;
+            try
+            {
+                if (SelectedPanel == panel) return;
 
-            SelectionChanged?.Invoke(this, panel.Beatmap);
+                if (SelectedPanel != null)
+                    SelectedPanel.State = PanelSelectedState.NotSelected;
+                SelectedPanel = panel;
+            }
+            finally
+            {
+                State = BeatmapGroupState.Expanded;
+                SelectionChanged?.Invoke(this, panel.Beatmap);
+            }
         }
     }
 

osu.Game/Beatmaps/Drawable/BeatmapPanel.cs

@@ -26,7 +26,7 @@ namespace osu.Game.Beatmaps.Drawable
             GainedSelection?.Invoke(this);
         }
 
-        public BeatmapPanel(BeatmapSetInfo set, BeatmapInfo beatmap)
+        public BeatmapPanel(BeatmapInfo beatmap)
         {
             Beatmap = beatmap;
             Height *= 0.75f;
@@ -67,7 +67,7 @@ namespace osu.Game.Beatmaps.Drawable
                                         },
                                         new SpriteText
                                         {
-                                            Text = $" mapped by {(beatmap.Metadata ?? set.Metadata).Author}",
+                                            Text = $" mapped by {(beatmap.Metadata ?? beatmap.BeatmapSet.Metadata).Author}",
                                             TextSize = 16,
                                         },
                                     }

osu.Game/Beatmaps/Drawable/Panel.cs

@@ -37,7 +37,6 @@ namespace osu.Game.Beatmaps.Drawable
             set
             {
                 if (state == value) return;
-
                 state = value;
 
                 switch (state)

osu.Game/Beatmaps/Objects/Catch/Drawable/DrawableFruit.cs

@@ -34,8 +34,8 @@ namespace osu.Game.Beatmaps.Objects.Catch.Drawable
 
             Texture = game.Textures.Get(@"Menu/logo");
 
-            Transforms.Add(new TransformPosition(Clock) { StartTime = h.StartTime - 200, EndTime = h.StartTime, StartValue = new Vector2(h.Position, -0.1f), EndValue = new Vector2(h.Position, 0.9f) });
-            Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime + h.Duration + 200, EndTime = h.StartTime + h.Duration + 400, StartValue = 1, EndValue = 0 });
+            Transforms.Add(new TransformPosition { StartTime = h.StartTime - 200, EndTime = h.StartTime, StartValue = new Vector2(h.Position, -0.1f), EndValue = new Vector2(h.Position, 0.9f) });
+            Transforms.Add(new TransformAlpha { StartTime = h.StartTime + h.Duration + 200, EndTime = h.StartTime + h.Duration + 400, StartValue = 1, EndValue = 0 });
             Expire(true);
         }
     }

osu.Game/Beatmaps/Objects/Mania/Drawable/DrawableNote.cs

@@ -25,8 +25,8 @@ namespace osu.Game.Beatmaps.Objects.Mania.Drawable
             base.Load(game);
             Texture = game.Textures.Get(@"Menu/logo");
 
-            Transforms.Add(new TransformPositionY(Clock) { StartTime = note.StartTime - 200, EndTime = note.StartTime, StartValue = -0.1f, EndValue = 0.9f });
-            Transforms.Add(new TransformAlpha(Clock) { StartTime = note.StartTime + note.Duration + 200, EndTime = note.StartTime + note.Duration + 400, StartValue = 1, EndValue = 0 });
+            Transforms.Add(new TransformPositionY() { StartTime = note.StartTime - 200, EndTime = note.StartTime, StartValue = -0.1f, EndValue = 0.9f });
+            Transforms.Add(new TransformAlpha() { StartTime = note.StartTime + note.Duration + 200, EndTime = note.StartTime + note.Duration + 400, StartValue = 1, EndValue = 0 });
             Expire(true);
         }
     }

osu.Game/Beatmaps/Objects/Osu/Drawable/DrawableCircle.cs

@@ -77,36 +77,36 @@ namespace osu.Game.Beatmaps.Objects.Osu.Drawable
 
             Flush(); //move to DrawableHitObject
 
-            Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime - 1000, EndTime = h.StartTime - 800, StartValue = 0, EndValue = 1 });
+            Transforms.Add(new TransformAlpha { StartTime = h.StartTime - 1000, EndTime = h.StartTime - 800, StartValue = 0, EndValue = 1 });
 
-            approachCircle.Transforms.Add(new TransformScale(Clock) { StartTime = h.StartTime - 1000, EndTime = h.StartTime, StartValue = new Vector2(2f), EndValue = new Vector2(0.6f) });
-            approachCircle.Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime, EndTime = h.StartTime, StartValue = 1, EndValue = 0 });
+            approachCircle.Transforms.Add(new TransformScale { StartTime = h.StartTime - 1000, EndTime = h.StartTime, StartValue = new Vector2(2f), EndValue = new Vector2(0.6f) });
+            approachCircle.Transforms.Add(new TransformAlpha { StartTime = h.StartTime, EndTime = h.StartTime, StartValue = 1, EndValue = 0 });
 
-            glow.Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime, EndTime = h.StartTime + 400, StartValue = glow.Alpha, EndValue = 0 });
+            glow.Transforms.Add(new TransformAlpha { StartTime = h.StartTime, EndTime = h.StartTime + 400, StartValue = glow.Alpha, EndValue = 0 });
 
             switch (state)
             {
                 case ArmedState.Disarmed:
-                    Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime + h.Duration + 200, EndTime = h.StartTime + h.Duration + 400, StartValue = 1, EndValue = 0 });
+                    Transforms.Add(new TransformAlpha { StartTime = h.StartTime + h.Duration + 200, EndTime = h.StartTime + h.Duration + 400, StartValue = 1, EndValue = 0 });
                     break;
                 case ArmedState.Armed:
                     const float flashIn = 30;
                     const float fadeOut = 800;
 
-                    //Transforms.Add(new TransformScale(Clock) { StartTime = h.StartTime, EndTime = h.StartTime + 400, StartValue = Scale, EndValue = Scale * 1.1f });
+                    //Transforms.Add(new TransformScale() { StartTime = h.StartTime, EndTime = h.StartTime + 400, StartValue = Scale, EndValue = Scale * 1.1f });
 
-                    ring.Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 0 });
-                    circle.Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 0 });
-                    number.Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 0 });
+                    ring.Transforms.Add(new TransformAlpha { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 0 });
+                    circle.Transforms.Add(new TransformAlpha { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 0 });
+                    number.Transforms.Add(new TransformAlpha { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 0 });
 
-                    flash.Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 0.8f });
-                    flash.Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn + 100, StartValue = 0.8f, EndValue = 0 });
+                    flash.Transforms.Add(new TransformAlpha { StartTime = h.StartTime, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 0.8f });
+                    flash.Transforms.Add(new TransformAlpha { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn + 100, StartValue = 0.8f, EndValue = 0 });
 
-                    explode.Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 1 });
+                    explode.Transforms.Add(new TransformAlpha { StartTime = h.StartTime, EndTime = h.StartTime + flashIn, StartValue = 0, EndValue = 1 });
 
-                    Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn + fadeOut, StartValue = 1, EndValue = 0 });
+                    Transforms.Add(new TransformAlpha { StartTime = h.StartTime + flashIn, EndTime = h.StartTime + flashIn + fadeOut, StartValue = 1, EndValue = 0 });
 
-                    Transforms.Add(new TransformScale(Clock) { StartTime = h.StartTime + h.Duration, EndTime = h.StartTime + h.Duration + 400, StartValue = Scale, EndValue = Scale * 1.5f, Easing = EasingTypes.OutQuad });
+                    Transforms.Add(new TransformScale { StartTime = h.StartTime + h.Duration, EndTime = h.StartTime + h.Duration + 400, StartValue = Scale, EndValue = Scale * 1.5f, Easing = EasingTypes.OutQuad });
                     break;
             }
         }

osu.Game/Beatmaps/Objects/Taiko/Drawable/DrawableTaikoHit.cs

@@ -29,8 +29,8 @@ namespace osu.Game.Beatmaps.Objects.Taiko.Drawable
 
             Texture = game.Textures.Get(@"Menu/logo");
 
-            Transforms.Add(new TransformPositionX(Clock) { StartTime = h.StartTime - 200, EndTime = h.StartTime, StartValue = 1.1f, EndValue = 0.1f });
-            Transforms.Add(new TransformAlpha(Clock) { StartTime = h.StartTime + h.Duration + 200, EndTime = h.StartTime + h.Duration + 400, StartValue = 1, EndValue = 0 });
+            Transforms.Add(new TransformPositionX { StartTime = h.StartTime - 200, EndTime = h.StartTime, StartValue = 1.1f, EndValue = 0.1f });
+            Transforms.Add(new TransformAlpha { StartTime = h.StartTime + h.Duration + 200, EndTime = h.StartTime + h.Duration + 400, StartValue = 1, EndValue = 0 });
             Expire(true);
         }
     }

osu.Game/Beatmaps/WorkingBeatmap.cs

@@ -0,0 +1,87 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.IO;
+using osu.Framework.Audio.Track;
+using osu.Game.Beatmaps.Formats;
+using osu.Game.Beatmaps.IO;
+using osu.Game.Database;
+
+namespace osu.Game.Beatmaps
+{
+    public class WorkingBeatmap : IDisposable
+    {
+        public BeatmapInfo BeatmapInfo;
+
+        public readonly ArchiveReader Reader;
+
+        private Beatmap beatmap;
+        public Beatmap Beatmap
+        {
+            get
+            {
+                if (beatmap != null) return beatmap;
+
+                try
+                {
+                    using (var stream = new StreamReader(Reader.ReadFile(BeatmapInfo.Path)))
+                        beatmap = BeatmapDecoder.GetDecoder(stream)?.Decode(stream);
+                }
+                catch { }
+
+                return beatmap;
+            }
+            set { beatmap = value; }
+        }
+
+        private AudioTrack track;
+        public AudioTrack Track
+        {
+            get
+            {
+                if (track != null) return track;
+
+                try
+                {
+                    var trackData = Reader.ReadFile(BeatmapInfo.Metadata.AudioFile);
+                    if (trackData != null)
+                        track = new AudioTrackBass(trackData);
+                }
+                catch { }
+
+                return track;
+            }
+            set { track = value; }
+        }
+
+        public WorkingBeatmap(BeatmapInfo beatmapInfo = null, ArchiveReader reader = null)
+        {
+            this.BeatmapInfo = beatmapInfo;
+            Reader = reader;
+        }
+
+        private bool isDisposed;
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (!isDisposed)
+            {
+                track?.Dispose();
+                Reader?.Dispose();
+                isDisposed = true;
+            }
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        public void TransferTo(WorkingBeatmap working)
+        {
+            if (track != null && working.BeatmapInfo.Metadata.AudioFile == BeatmapInfo.Metadata.AudioFile && working.BeatmapInfo.BeatmapSet.Path == BeatmapInfo.BeatmapSet.Path)
+                working.track = track;
+        }
+    }
+}

osu.Game/Database/BeatmapDatabase.cs

@@ -130,43 +130,56 @@ namespace osu.Game.Database
         {
             return ArchiveReader.GetReader(storage, beatmapSet.Path);
         }
-        
+
         public BeatmapSetInfo GetBeatmapSet(int id)
         {
             return Query<BeatmapSetInfo>().Where(s => s.BeatmapSetID == id).FirstOrDefault();
         }
-        
+
+        public WorkingBeatmap GetWorkingBeatmap(BeatmapInfo beatmapInfo, WorkingBeatmap previous = null)
+        {
+            var beatmapSetInfo = Query<BeatmapSetInfo>().FirstOrDefault(s => s.BeatmapSetID == beatmapInfo.BeatmapSetID);
+
+            //we need metadata
+            GetChildren(beatmapSetInfo);
+
+            if (beatmapSetInfo == null)
+                throw new InvalidOperationException($@"Beatmap set {beatmapInfo.BeatmapSetID} is not in the local database.");
+
+            var reader = GetReader(beatmapSetInfo);
+
+            if (beatmapInfo.Metadata == null)
+                beatmapInfo.Metadata = beatmapSetInfo.Metadata;
+
+            var working = new WorkingBeatmap(beatmapInfo, reader);
+
+            previous?.TransferTo(working);
+
+            return working;
+        }
+
         public Beatmap GetBeatmap(BeatmapInfo beatmapInfo)
         {
-            var beatmapSet = Query<BeatmapSetInfo>()
-                .Where(s => s.BeatmapSetID == beatmapInfo.BeatmapSetID).FirstOrDefault();    
-            if (beatmapSet == null)
-                throw new InvalidOperationException(
-                    $@"Beatmap set {beatmapInfo.BeatmapSetID} is not in the local database.");
-            using (var reader = GetReader(beatmapSet))
-            using (var stream = new StreamReader(reader.ReadFile(beatmapInfo.Path)))
-            {
-                var decoder = BeatmapDecoder.GetDecoder(stream);
-                return decoder.Decode(stream);
-            }
+            using (WorkingBeatmap data = GetWorkingBeatmap(beatmapInfo))
+                return data.Beatmap;
         }
-        
+
         public TableQuery<T> Query<T>() where T : class
         {
             return connection.Table<T>();
         }
-        
+
         public T GetWithChildren<T>(object id) where T : class
         {
             return connection.GetWithChildren<T>(id);
         }
-        
+
         public List<T> GetAllWithChildren<T>(Expression<Func<T, bool>> filter = null,
             bool recursive = true) where T : class
         {
             return connection.GetAllWithChildren<T>(filter, recursive);
         }
-        
+
         public T GetChildren<T>(T item, bool recursive = true)
         {
             if (item == null) return default(T);

osu.Game/Database/BeatmapInfo.cs

@@ -7,7 +7,7 @@ using SQLiteNetExtensions.Attributes;
 
 namespace osu.Game.Database
 {
-    public class BeatmapInfo
+    public class BeatmapInfo : IEquatable<BeatmapInfo>
     {
         [PrimaryKey]
         public int BeatmapID { get; set; }
@@ -64,5 +64,10 @@ namespace osu.Game.Database
         
         // Metadata
         public string Version { get; set; }
+
+        public bool Equals(BeatmapInfo other)
+        {
+            return BeatmapID == other?.BeatmapID;
+        }
     }
 }

osu.Game/GameModes/Menu/Button.cs

@@ -117,7 +117,7 @@ namespace osu.Game.GameModes.Menu
             icon.RotateTo(10, offset, EasingTypes.InOutSine);
             icon.ScaleTo(new Vector2(1, 0.9f), offset, EasingTypes.Out);
 
-            icon.Transforms.Add(new TransformRotation(Clock)
+            icon.Transforms.Add(new TransformRotation
             {
                 StartValue = -10,
                 EndValue = 10,
@@ -128,7 +128,7 @@ namespace osu.Game.GameModes.Menu
                 LoopDelay = duration * 2
             });
 
-            icon.Transforms.Add(new TransformPosition(Clock)
+            icon.Transforms.Add(new TransformPosition
             {
                 StartValue = Vector2.Zero,
                 EndValue = new Vector2(0, -10),
@@ -139,7 +139,7 @@ namespace osu.Game.GameModes.Menu
                 LoopDelay = duration
             });
 
-            icon.Transforms.Add(new TransformScale(Clock)
+            icon.Transforms.Add(new TransformScale
             {
                 StartValue = new Vector2(1, 0.9f),
                 EndValue = Vector2.One,
@@ -150,7 +150,7 @@ namespace osu.Game.GameModes.Menu
                 LoopDelay = duration
             });
 
-            icon.Transforms.Add(new TransformPosition(Clock)
+            icon.Transforms.Add(new TransformPosition
             {
                 StartValue = new Vector2(0, -10),
                 EndValue = Vector2.Zero,
@@ -161,7 +161,7 @@ namespace osu.Game.GameModes.Menu
                 LoopDelay = duration
             });
 
-            icon.Transforms.Add(new TransformScale(Clock)
+            icon.Transforms.Add(new TransformScale
             {
                 StartValue = Vector2.One,
                 EndValue = new Vector2(1, 0.9f),
@@ -172,7 +172,7 @@ namespace osu.Game.GameModes.Menu
                 LoopDelay = duration
             });
 
-            icon.Transforms.Add(new TransformRotation(Clock)
+            icon.Transforms.Add(new TransformRotation
             {
                 StartValue = 10,
                 EndValue = -10,

osu.Game/GameModes/Menu/Intro.cs

@@ -10,6 +10,8 @@ using osu.Framework.Graphics.Transformations;
 using osu.Game.GameModes.Backgrounds;
 using OpenTK.Graphics;
 using osu.Framework;
+using osu.Framework.Configuration;
+using osu.Game.Beatmaps;
 
 namespace osu.Game.GameModes.Menu
 {

osu.Game/GameModes/OsuGameMode.cs

@@ -3,17 +3,20 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using osu.Framework.Configuration;
 using osu.Framework.GameModes;
 using osu.Framework.Graphics.Containers;
+using osu.Game.Beatmaps;
 using osu.Game.Graphics.Background;
 using osu.Game.Graphics.Containers;
 
 namespace osu.Game.GameModes
 {
-    public class OsuGameMode : GameMode
+    public abstract class OsuGameMode : GameMode
     {
         internal BackgroundMode Background { get; private set; }
 
@@ -23,6 +26,64 @@ namespace osu.Game.GameModes
         /// </summary>
         protected virtual BackgroundMode CreateBackground() => null;
 
+        private bool boundToBeatmap;
+        private Bindable<WorkingBeatmap> beatmap;
+
+        public WorkingBeatmap Beatmap
+        {
+            get
+            {
+                bindBeatmap();
+                return beatmap.Value;
+            }
+            set
+            {
+                bindBeatmap();
+                beatmap.Value = value;
+            }
+        }
+
+        private void bindBeatmap()
+        {
+            if (beatmap == null)
+                beatmap = new Bindable<WorkingBeatmap>();
+
+            if (!boundToBeatmap)
+            {
+                beatmap.ValueChanged += beatmap_ValueChanged;
+                boundToBeatmap = true;
+            }
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            if (boundToBeatmap)
+                beatmap.ValueChanged -= beatmap_ValueChanged;
+
+            base.Dispose(isDisposing);
+        }
+
+        private void beatmap_ValueChanged(object sender, EventArgs e)
+        {
+            OnBeatmapChanged(beatmap.Value);
+        }
+
+        public override bool Push(GameMode mode)
+        {
+            OsuGameMode nextOsu = mode as OsuGameMode;
+            if (nextOsu != null)
+            {
+                nextOsu.beatmap = beatmap;
+            }
+
+            return base.Push(mode);
+        }
+
+        protected virtual void OnBeatmapChanged(WorkingBeatmap beatmap)
+        {
+
+        }
+
         protected override void OnEntering(GameMode last)
         {
             OsuGameMode lastOsu = last as OsuGameMode;

osu.Game/GameModes/Play/ComboCounter.cs

@@ -174,7 +174,7 @@ namespace osu.Game.GameModes.Play
 
         protected virtual void OnCountRolling(ulong currentValue, ulong newValue)
         {
-            transformRoll(new TransformComboRoll(Clock), currentValue, newValue);
+            transformRoll(new TransformComboRoll(), currentValue, newValue);
         }
 
         protected virtual void OnCountIncrement(ulong currentValue, ulong newValue) {
@@ -248,11 +248,11 @@ namespace osu.Game.GameModes.Play
 
         protected class TransformComboRoll : Transform<ulong>
         {
-            public override ulong CurrentValue
+            protected override ulong CurrentValue
             {
                 get
                 {
-                    double time = Time;
+                    double time = CurrentTime ?? 0;
                     if (time < StartTime) return StartValue;
                     if (time >= EndTime) return EndValue;
 
@@ -265,11 +265,6 @@ namespace osu.Game.GameModes.Play
                 base.Apply(d);
                 (d as ComboCounter).DisplayedCount = CurrentValue;
             }
-
-            public TransformComboRoll(IClock clock)
-                : base(clock)
-            {
-            }
         }
     }
 }

osu.Game/GameModes/Play/ComboResultCounter.cs

@@ -41,11 +41,11 @@ namespace osu.Game.GameModes.Play
 
         protected class TransformComboResult : Transform<ulong>
         {
-            public override ulong CurrentValue
+            protected override ulong CurrentValue
             {
                 get
                 {
-                    double time = Time;
+                    double time = CurrentTime ?? 0;
                     if (time < StartTime) return StartValue;
                     if (time >= EndTime) return EndValue;
 
@@ -58,11 +58,6 @@ namespace osu.Game.GameModes.Play
                 base.Apply(d);
                 (d as ComboResultCounter).DisplayedCount = CurrentValue;
             }
-
-            public TransformComboResult(IClock clock)
-                : base(clock)
-            {
-            }
         }
     }
 }

osu.Game/GameModes/Play/PlaySongSelect.cs

@@ -16,8 +16,11 @@ using OpenTK;
 using OpenTK.Graphics;
 using osu.Framework.Graphics.UserInterface;
 using System.Threading.Tasks;
+using osu.Framework.Audio.Track;
 using osu.Game.Beatmaps.Drawable;
 using osu.Framework.Extensions.IEnumerableExtensions;
+using osu.Game.Beatmaps;
+using osu.Framework.GameModes;
 
 namespace osu.Game.GameModes.Play
 {
@@ -26,10 +29,12 @@ namespace osu.Game.GameModes.Play
         private Bindable<PlayMode> playMode;
         private BeatmapDatabase database;
         private BeatmapGroup selectedBeatmapGroup;
+        private BeatmapInfo selectedBeatmapInfo;
         // TODO: use currently selected track as bg
         protected override BackgroundMode CreateBackground() => new BackgroundModeCustom(@"Backgrounds/bg4");
         private ScrollContainer scrollContainer;
-        private FlowContainer setList;
+        private FlowContainer beatmapSetFlow;
+        private TrackManager trackManager;
 
         /// <param name="database">Optionally provide a database to use instead of the OsuGame one.</param>
         public PlaySongSelect(BeatmapDatabase database = null)
@@ -73,7 +78,7 @@ namespace osu.Game.GameModes.Play
                     Origin = Anchor.CentreRight,
                     Children = new Drawable[]
                     {
-                        setList = new FlowContainer
+                        beatmapSetFlow = new FlowContainer
                         {
                             Padding = new MarginPadding { Left = 25, Top = 25, Bottom = 25 + bottomToolHeight },
                             RelativeSizeAxes = Axes.X,
@@ -107,7 +112,7 @@ namespace osu.Game.GameModes.Play
                             Colour = new Color4(238, 51, 153, 255),
                             Action = () => Push(new Player {
                                 BeatmapInfo = selectedBeatmapGroup.SelectedPanel.Beatmap,
-                                PlayMode = playMode.Value
+                                PreferredPlayMode = playMode.Value
                             }),
                         },
                     }
@@ -123,7 +128,7 @@ namespace osu.Game.GameModes.Play
             if (osuGame != null)
             {
                 playMode = osuGame.PlayMode;
-                playMode.ValueChanged += PlayMode_ValueChanged;
+                playMode.ValueChanged += playMode_ValueChanged;
                 // Temporary:
                 scrollContainer.Padding = new MarginPadding { Top = osuGame.Toolbar.Height };
             }
@@ -133,22 +138,76 @@ namespace osu.Game.GameModes.Play
 
             database.BeatmapSetAdded += s => Schedule(() => addBeatmapSet(s));
 
+            trackManager = game.Audio.Track;
+
             Task.Factory.StartNew(addBeatmapSets);
         }
 
+        protected override void OnEntering(GameMode last)
+        {
+            base.OnEntering(last);
+            ensurePlayingSelected();
+        }
+
+        protected override void OnResuming(GameMode last)
+        {
+            ensurePlayingSelected();
+            base.OnResuming(last);
+        }
+
         protected override void Dispose(bool isDisposing)
         {
             base.Dispose(isDisposing);
             if (playMode != null)
-                playMode.ValueChanged -= PlayMode_ValueChanged;
+                playMode.ValueChanged -= playMode_ValueChanged;
         }
 
-        private void PlayMode_ValueChanged(object sender, EventArgs e)
+        private void playMode_ValueChanged(object sender, EventArgs e)
         {
         }
 
-        private void selectBeatmap(BeatmapGroup group, BeatmapInfo beatmap)
+        /// <summary>
+        /// The global Beatmap was changed.
+        /// </summary>
+        protected override void OnBeatmapChanged(WorkingBeatmap beatmap)
         {
+            base.OnBeatmapChanged(beatmap);
+            selectBeatmap(beatmap.BeatmapInfo);
+        }
+
+        private void selectBeatmap(BeatmapInfo beatmap)
+        {
+            if (beatmap.Equals(selectedBeatmapInfo))
+                return;
+
+            //this is VERY temporary logic.
+            beatmapSetFlow.Children.Cast<BeatmapGroup>().Any(b =>
+            {
+                var panel = b.BeatmapPanels.FirstOrDefault(p => p.Beatmap.Equals(beatmap));
+                if (panel != null)
+                {
+                    panel.State = PanelSelectedState.Selected;
+                    return true;
+                }
+
+                return false;
+            });
+        }
+
+        /// <summary>
+        /// selection has been changed as the result of interaction with the carousel.
+        /// </summary>
+        private void selectionChanged(BeatmapGroup group, BeatmapInfo beatmap)
+        {
+            selectedBeatmapInfo = beatmap;
+
+            if (!beatmap.Equals(Beatmap?.BeatmapInfo))
+            {
+                Beatmap = database.GetWorkingBeatmap(beatmap, Beatmap);
+            }
+
+            ensurePlayingSelected();
+
             if (selectedBeatmapGroup == group)
                 return;
 
@@ -158,6 +217,17 @@ namespace osu.Game.GameModes.Play
             selectedBeatmapGroup = group;
         }
 
+        private void ensurePlayingSelected()
+        {
+            var track = Beatmap?.Track;
+
+            if (track != null)
+            {
+                trackManager.SetExclusive(track);
+                track.Start();
+            }
+        }
+
         private void addBeatmapSet(BeatmapSetInfo beatmapSet)
         {
             beatmapSet = database.GetWithChildren<BeatmapSetInfo>(beatmapSet.BeatmapSetID);
@@ -165,10 +235,22 @@ namespace osu.Game.GameModes.Play
             beatmapSet.Beatmaps = beatmapSet.Beatmaps.OrderBy(b => b.BaseDifficulty.OverallDifficulty).ToList();
             Schedule(() =>
             {
-                var group = new BeatmapGroup(beatmapSet) { SelectionChanged = selectBeatmap };
-                setList.Add(group);
-                if (setList.Children.Count() == 1)
-                    group.State = BeatmapGroupState.Expanded;
+                var group = new BeatmapGroup(beatmapSet) { SelectionChanged = selectionChanged };
+                beatmapSetFlow.Add(group);
+                if (Beatmap == null)
+                {
+                    if (beatmapSetFlow.Children.Count() == 1)
+                        group.State = BeatmapGroupState.Expanded;
+                }
+                else
+                {
+                    if (selectedBeatmapInfo?.Equals(Beatmap.BeatmapInfo) != true)
+                    {
+                        var panel = group.BeatmapPanels.FirstOrDefault(p => p.Beatmap.Equals(Beatmap.BeatmapInfo));
+                        if (panel != null)
+                            panel.State = PanelSelectedState.Selected;
+                    }
+                }
             });
         }
 

osu.Game/GameModes/Play/Player.cs

@@ -1,7 +1,6 @@
 //Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
 //Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using System.Collections.Generic;
 using osu.Framework.Graphics;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.Objects;
@@ -12,6 +11,9 @@ using osu.Game.GameModes.Play.Osu;
 using osu.Game.GameModes.Play.Taiko;
 using osu.Framework;
 using osu.Game.Database;
+using osu.Framework.Timing;
+using osu.Framework.GameModes;
+using osu.Framework.Audio.Track;
 
 namespace osu.Game.GameModes.Play
 {
@@ -20,9 +22,13 @@ namespace osu.Game.GameModes.Play
         protected override BackgroundMode CreateBackground() => new BackgroundModeCustom(@"Backgrounds/bg4");
 
         public BeatmapInfo BeatmapInfo;
-        public Beatmap Beatmap;
 
-        public PlayMode PlayMode;
+        public PlayMode PreferredPlayMode;
+
+        protected override IFrameBasedClock Clock => playerClock;
+
+        private InterpolatingFramedClock playerClock;
+        private IAdjustableClock sourceClock;
 
         public override void Load(BaseGame game)
         {
@@ -31,7 +37,7 @@ namespace osu.Game.GameModes.Play
             try
             {
                 if (Beatmap == null)
-                    Beatmap = ((OsuGame)game).Beatmaps.GetBeatmap(BeatmapInfo);
+                    Beatmap = ((OsuGame)game).Beatmaps.GetWorkingBeatmap(BeatmapInfo);
             }
             catch
             {
@@ -40,17 +46,45 @@ namespace osu.Game.GameModes.Play
                 return;
             }
 
+            AudioTrack track = Beatmap.Track;
+
+            if (track != null)
+            {
+                game.Audio.Track.SetExclusive(track);
+                sourceClock = track;
+            }
+
+            sourceClock = (IAdjustableClock)track ?? new StopwatchClock();
+            playerClock = new InterpolatingFramedClock(sourceClock);
+
+            Schedule(() =>
+            {
+                sourceClock.Reset();
+                sourceClock.Start();
+            });
+
             HitRenderer hitRenderer;
             ScoreOverlay scoreOverlay;
 
-            switch (PlayMode)
+            var beatmap = Beatmap.Beatmap;
+
+            if (beatmap.BeatmapInfo?.Mode > PlayMode.Osu)
+            {
+                //we only support osu! mode for now because the hitobject parsing is crappy and needs a refactor.
+                Exit();
+                return;
+            }
+
+            PlayMode usablePlayMode = beatmap.BeatmapInfo?.Mode > PlayMode.Osu ? beatmap.BeatmapInfo.Mode : PreferredPlayMode;
+
+            switch (usablePlayMode)
             {
                 default:
                     scoreOverlay = new ScoreOverlayOsu();
 
                     hitRenderer = new OsuHitRenderer
                     {
-                        Objects = Beatmap.HitObjects,
+                        Objects = beatmap.HitObjects,
                         Anchor = Anchor.Centre,
                         Origin = Anchor.Centre
                     };
@@ -60,7 +94,7 @@ namespace osu.Game.GameModes.Play
 
                     hitRenderer = new TaikoHitRenderer
                     {
-                        Objects = Beatmap.HitObjects,
+                        Objects = beatmap.HitObjects,
                         Anchor = Anchor.Centre,
                         Origin = Anchor.Centre
                     };
@@ -70,7 +104,7 @@ namespace osu.Game.GameModes.Play
 
                     hitRenderer = new CatchHitRenderer
                     {
-                        Objects = Beatmap.HitObjects,
+                        Objects = beatmap.HitObjects,
                         Anchor = Anchor.Centre,
                         Origin = Anchor.Centre
                     };
@@ -80,7 +114,7 @@ namespace osu.Game.GameModes.Play
 
                     hitRenderer = new ManiaHitRenderer
                     {
-                        Objects = Beatmap.HitObjects,
+                        Objects = beatmap.HitObjects,
                         Anchor = Anchor.Centre,
                         Origin = Anchor.Centre
                     };
@@ -96,5 +130,11 @@ namespace osu.Game.GameModes.Play
                 scoreOverlay,
             };
         }
+
+        protected override void Update()
+        {
+            base.Update();
+            playerClock.ProcessFrame();
+        }
     }
 }

osu.Game/GameModes/Ranking/Results.cs

@@ -1,16 +1,11 @@
 //Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
 //Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using osu.Framework.GameModes;
 using osu.Game.GameModes.Backgrounds;
 using OpenTK.Graphics;
 
-namespace osu.Game.GameModes.Play
+namespace osu.Game.GameModes.Ranking
 {
     class Results : GameModeWhiteBox
     {

osu.Game/Graphics/UserInterface/PercentageCounter.cs

@@ -57,11 +57,6 @@ namespace osu.Game.Graphics.UserInterface
                 base.Apply(d);
                 (d as PercentageCounter).DisplayedCount = CurrentValue;
             }
-
-            public TransformAccuracy(IClock clock)
-                : base(clock)
-            {
-            }
         }
     }
 }

osu.Game/Graphics/UserInterface/RollingCounter.cs

@@ -194,14 +194,12 @@ namespace osu.Game.Graphics.UserInterface
         /// <seealso cref="TransformType"/>
         protected virtual void TransformCount(T currentValue, T newValue)
         {
-            object[] parameters = { Clock };
-
             Debug.Assert(
                 TransformType.IsSubclassOf(typeof(Transform<T>)) || TransformType == typeof(Transform<T>),
                 @"transformType should be a subclass of Transform<T>."
             );
 
-            TransformCount((Transform<T>)Activator.CreateInstance(TransformType, parameters), currentValue, newValue);
+            TransformCount((Transform<T>)Activator.CreateInstance(TransformType), currentValue, newValue);
         }
 
         /// <summary>

osu.Game/Graphics/UserInterface/ScoreCounter.cs

@@ -56,11 +56,11 @@ namespace osu.Game.Graphics.UserInterface
 
         protected class TransformScore : Transform<ulong>
         {
-            public override ulong CurrentValue
+            protected override ulong CurrentValue
             {
                 get
                 {
-                    double time = Time;
+                    double time = CurrentTime ?? 0;
                     if (time < StartTime) return StartValue;
                     if (time >= EndTime) return EndValue;
 
@@ -73,11 +73,6 @@ namespace osu.Game.Graphics.UserInterface
                 base.Apply(d);
                 (d as ScoreCounter).DisplayedCount = CurrentValue;
             }
-
-            public TransformScore(IClock clock)
-                : base(clock)
-            {
-            }
         }
     }
 }

osu.Game/OsuGame.cs

@@ -70,7 +70,10 @@ namespace osu.Game
                     RelativeSizeAxes = Axes.Both,
                     ActivateRequested = delegate { volume.Show(); }
                 },
-                intro = new Intro(),
+                intro = new Intro
+                {
+                    Beatmap = Beatmap
+                },
                 Toolbar = new Toolbar
                 {
                     OnHome = delegate { MainMenu?.MakeCurrent(); },

osu.Game/OsuGameBase.cs

@@ -1,10 +1,13 @@
-using osu.Framework;
+using System;
+using osu.Framework;
+using osu.Framework.Configuration;
 using osu.Framework.GameModes;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Textures;
 using osu.Framework.IO.Stores;
+using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.IO;
 using osu.Game.Configuration;
 using osu.Game.Database;
@@ -32,6 +35,8 @@ namespace osu.Game
 
         public CursorContainer Cursor;
 
+        public readonly Bindable<WorkingBeatmap> Beatmap = new Bindable<WorkingBeatmap>();
+
         public OsuGameBase()
         {
             AddInternal(ratioContainer = new RatioAdjust());
@@ -41,6 +46,13 @@ namespace osu.Game
                 Options = new Options(),
                 Cursor = new OsuCursorContainer()
             };
+
+            Beatmap.ValueChanged += Beatmap_ValueChanged;
+        }
+
+        private void Beatmap_ValueChanged(object sender, EventArgs e)
+        {
+            throw new NotImplementedException();
         }
 
         public override void Load(BaseGame game)

osu.Game/osu.Game.csproj

@@ -64,6 +64,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Beatmaps\Beatmap.cs" />
+    <Compile Include="Beatmaps\WorkingBeatmap.cs" />
     <Compile Include="Beatmaps\Drawable\BeatmapSetHeader.cs" />
     <Compile Include="Beatmaps\Drawable\DifficultyIcon.cs" />
     <Compile Include="Beatmaps\Drawable\Panel.cs" />
@@ -124,7 +125,7 @@
     <Compile Include="GameModes\Play\Player.cs" />
     <Compile Include="GameModes\Charts\ChartListing.cs" />
     <Compile Include="GameModes\Play\PlayMode.cs" />
-    <Compile Include="GameModes\Play\Results.cs" />
+    <Compile Include="GameModes\Ranking\Results.cs" />
     <Compile Include="GameModes\Direct\OnlineListing.cs" />
     <Compile Include="GameModes\Play\PlaySongSelect.cs" />
     <Compile Include="GameModes\Play\Catch\CatchHitRenderer.cs" />