Replay loading via drag-drop huzzah!

osu.Desktop.VisualTests/Tests/TestCaseReplay.cs

@@ -26,88 +26,13 @@ using osu.Game.Screens.Play;
 using OpenTK.Graphics;
 using OpenTK.Input;
 using SharpCompress.Archives.SevenZip;
+using SharpCompress.Compressors.LZMA;
 using SharpCompress.Readers;
 using KeyboardState = osu.Framework.Input.KeyboardState;
 using MouseState = osu.Framework.Input.MouseState;
 
 namespace osu.Desktop.VisualTests.Tests
 {
-    public class ScoreDatabase
-    {
-        private readonly Storage storage;
-
-        private const string replay_folder = @"replays";
-
-        public ScoreDatabase(Storage storage)
-        {
-            this.storage = storage;
-        }
-
-        public Score ReadReplayFile(string replayFilename)
-        {
-            Score score;
-
-            using (Stream s = storage.GetStream(Path.Combine(replay_folder, replayFilename)))
-            using (SerializationReader sr = new SerializationReader(s))
-            {
-                var ruleset = Ruleset.GetRuleset((PlayMode)sr.ReadByte());
-                var processor = ruleset.CreateScoreProcessor();
-
-                score = processor.GetScore();
-
-
-
-                /* score.Pass = true;*/
-                var version =  sr.ReadInt32();
-                /* score.FileChecksum = */ sr.ReadString();
-                /* score.PlayerName = */ sr.ReadString();
-                /* var localScoreChecksum = */ sr.ReadString();
-                /* score.Count300 = */ sr.ReadUInt16();
-                /* score.Count100 = */ sr.ReadUInt16();
-                /* score.Count50 = */ sr.ReadUInt16();
-                /* score.CountGeki = */ sr.ReadUInt16();
-                /* score.CountKatu = */ sr.ReadUInt16();
-                /* score.CountMiss = */ sr.ReadUInt16();
-                score.TotalScore = sr.ReadInt32();
-                score.MaxCombo = sr.ReadUInt16();
-                /* score.Perfect = */ sr.ReadBoolean();
-                /* score.EnabledMods = (Mods)*/ sr.ReadInt32();
-                /* score.HpGraphString = */ sr.ReadString();
-                /* score.Date = */ sr.ReadDateTime();
-
-                var compressedReplay = sr.ReadByteArray();
-
-                if (version >= 20140721)
-                    /*OnlineId =*/ sr.ReadInt64();
-                else if (version >= 20121008)
-                    /*OnlineId =*/ sr.ReadInt32();
-
-                //new ASCIIEncoding().GetString(SevenZipHelper.Decompress(ReplayCompressed)));
-
-                score.Replay = new LegacyReplay();
-
-                //float lastTime = 0;
-                //foreach (var l in File.ReadAllText(@"C:\Users\Dean\Desktop\2157025197").Split(','))
-                //{
-                //    var split = l.Split('|');
-
-                //    if (split.Length < 4 || float.Parse(split[0]) < 0) continue;
-
-                //    lastTime += float.Parse(split[0]);
-
-                //    list.Add(new LegacyReplay.LegacyReplayInputHandler.LegacyReplayFrame(
-                //        lastTime,
-                //        float.Parse(split[1]),
-                //        384 - float.Parse(split[2]),
-                //        (LegacyReplay.LegacyReplayInputHandler.LegacyButtonState)int.Parse(split[3])
-                //        ));
-                //}
-            }
-
-            return score;
-        }
-    }
-
     class TestCaseReplay : TestCasePlayer
     {
         private WorkingBeatmap beatmap;
@@ -134,235 +59,4 @@ namespace osu.Desktop.VisualTests.Tests
             return player;
         }
     }
-
-    public class LegacyReplay : Replay
-    {
-        private new List<LegacyReplayFrame> frames = new List<LegacyReplayFrame>();
-
-        public override ReplayInputHandler GetInputHandler() => new LegacyReplayInputHandler(frames);
-
-        /// <summary>
-        /// The ReplayHandler will take a replay and handle the propagation of updates to the input stack.
-        /// It handles logic of any frames which *must* be executed.
-        /// </summary>
-        public class LegacyReplayInputHandler : ReplayInputHandler
-        {
-            private readonly List<LegacyReplayFrame> replayContent;
-            int currentFrameIndex;
-
-            public LegacyReplayFrame CurrentFrame => !hasFrames ? null : replayContent[currentFrameIndex];
-            public LegacyReplayFrame NextFrame => !hasFrames ? null : replayContent[MathHelper.Clamp(currentDirection > 0 ? currentFrameIndex + 1 : currentFrameIndex - 1, 0, replayContent.Count - 1)];
-
-            public LegacyReplayInputHandler(List<LegacyReplayFrame> replayContent)
-            {
-                this.replayContent = replayContent;
-            }
-
-            private bool nextFrame()
-            {
-                int newFrame = MathHelper.Clamp(currentFrameIndex + (currentDirection > 0 ? 1 : -1), 0, replayContent.Count - 1);
-
-                //ensure we aren't at an extent.
-                if (newFrame == currentFrameIndex) return false;
-
-                currentFrameIndex = newFrame;
-                return true;
-            }
-
-            public void SetPosition(Vector2 pos)
-            {
-            }
-
-            private Vector2? position
-            {
-                get
-                {
-                    if (!hasFrames)
-                        return null;
-
-                    if (AtLastFrame)
-                        return CurrentFrame.Position;
-
-                    return Interpolation.ValueAt(currentTime, CurrentFrame.Position, NextFrame.Position, CurrentFrame.Time, NextFrame.Time);
-                }
-            }
-
-            public override List<InputState> GetPendingStates()
-            {
-                return new List<InputState>
-                {
-                    new InputState
-                    {
-                        Mouse = new ReplayMouseState(
-                            ToScreenSpace(position ?? Vector2.Zero),
-                            new List<MouseState.ButtonState>
-                            {
-                                new MouseState.ButtonState(MouseButton.Left)
-                                {
-                                    State = CurrentFrame?.MouseLeft ?? false
-                                },
-                                new MouseState.ButtonState(MouseButton.Right)
-                                {
-                                    State = CurrentFrame?.MouseRight ?? false
-                                },
-                            }
-                        ),
-                        Keyboard = new ReplayKeyboardState(new List<Key>())
-                    }
-                };
-            }
-
-            public bool AtLastFrame => currentFrameIndex == replayContent.Count - 1;
-            public bool AtFirstFrame => currentFrameIndex == 0;
-
-            public Vector2 Size => new Vector2(512, 384);
-
-            private const double sixty_frame_time = 1000 / 60;
-
-            double currentTime;
-            int currentDirection;
-
-            /// <summary>
-            /// When set, we will ensure frames executed by nested drawables are frame-accurate to replay data.
-            /// Disabling this can make replay playback smoother (useful for autoplay, currently).
-            /// </summary>
-            public bool FrameAccuratePlayback = true;
-
-            private bool hasFrames => replayContent.Count > 0;
-
-            bool inImportantSection =>
-                FrameAccuratePlayback &&
-                //a button is in a pressed state
-                (currentDirection > 0 ? CurrentFrame : NextFrame)?.ButtonState > LegacyButtonState.None &&
-                //the next frame is within an allowable time span
-                Math.Abs(currentTime - NextFrame?.Time ?? 0) <= sixty_frame_time * 1.2;
-
-            /// <summary>
-            /// Update the current frame based on an incoming time value.
-            /// There are cases where we return a "must-use" time value that is different from the input.
-            /// This is to ensure accurate playback of replay data.
-            /// </summary>
-            /// <param name="time">The time which we should use for finding the current frame.</param>
-            /// <returns>The usable time value. If null, we shouldn't be running components reliant on this data.</returns>
-            public override double? SetFrameFromTime(double time)
-            {
-                currentDirection = time.CompareTo(currentTime);
-                if (currentDirection == 0) currentDirection = 1;
-
-                if (hasFrames)
-                {
-                    //if we changed frames, we want to execute once *exactly* on the frame's time.
-                    if (currentDirection == time.CompareTo(NextFrame.Time) && nextFrame())
-                        return currentTime = CurrentFrame.Time;
-
-                    //if we didn't change frames, we need to ensure we are allowed to run frames in between, else return null.
-                    if (inImportantSection)
-                        return null;
-                }
-
-                return currentTime = time;
-            }
-
-            private class ReplayMouseState : MouseState
-            {
-                public ReplayMouseState(Vector2 position, List<ButtonState> list)
-                {
-                    Position = position;
-                    ButtonStates = list;
-                }
-            }
-
-            private class ReplayKeyboardState : KeyboardState
-            {
-                public ReplayKeyboardState(List<Key> keys)
-                {
-                    Keys = keys;
-                }
-            }
-        }
-
-        [Flags]
-        public enum LegacyButtonState
-        {
-            None = 0,
-            Left1 = 1,
-            Right1 = 2,
-            Left2 = 4,
-            Right2 = 8,
-            Smoke = 16
-        }
-
-        public class LegacyReplayFrame
-        {
-            public Vector2 Position => new Vector2(MouseX, MouseY);
-
-            public float MouseX;
-            public float MouseY;
-            public bool MouseLeft;
-            public bool MouseRight;
-            public bool MouseLeft1;
-            public bool MouseRight1;
-            public bool MouseLeft2;
-            public bool MouseRight2;
-            public LegacyButtonState ButtonState;
-            public double Time;
-
-            public LegacyReplayFrame(double time, float posX, float posY, LegacyButtonState buttonState)
-            {
-                MouseX = posX;
-                MouseY = posY;
-                ButtonState = buttonState;
-                SetButtonStates(buttonState);
-                Time = time;
-            }
-
-            public void SetButtonStates(LegacyButtonState buttonState)
-            {
-                ButtonState = buttonState;
-                MouseLeft = (buttonState & (LegacyButtonState.Left1 | LegacyButtonState.Left2)) > 0;
-                MouseLeft1 = (buttonState & LegacyButtonState.Left1) > 0;
-                MouseLeft2 = (buttonState & LegacyButtonState.Left2) > 0;
-                MouseRight = (buttonState & (LegacyButtonState.Right1 | LegacyButtonState.Right2)) > 0;
-                MouseRight1 = (buttonState & LegacyButtonState.Right1) > 0;
-                MouseRight2 = (buttonState & LegacyButtonState.Right2) > 0;
-            }
-
-            public LegacyReplayFrame(Stream s) : this(new SerializationReader(s))
-            {
-            }
-
-            public LegacyReplayFrame(SerializationReader sr)
-            {
-                ButtonState = (LegacyButtonState)sr.ReadByte();
-                SetButtonStates(ButtonState);
-
-                byte bt = sr.ReadByte();
-                if (bt > 0)//Handle Pre-Taiko compatible replays.
-                    SetButtonStates(LegacyButtonState.Right1);
-
-                MouseX = sr.ReadSingle();
-                MouseY = sr.ReadSingle();
-                Time = sr.ReadInt32();
-            }
-
-            public void ReadFromStream(SerializationReader sr)
-            {
-                throw new System.NotImplementedException();
-            }
-
-            public void WriteToStream(SerializationWriter sw)
-            {
-                sw.Write((byte)ButtonState);
-                sw.Write((byte)0);
-                sw.Write(MouseX);
-                sw.Write(MouseY);
-                sw.Write(Time);
-            }
-
-            public override string ToString()
-            {
-                return $"{Time}\t({MouseX},{MouseY})\t{MouseLeft}\t{MouseRight}\t{MouseLeft1}\t{MouseRight1}\t{MouseLeft2}\t{MouseRight2}\t{ButtonState}";
-            }
-        }
-    }
 }

osu.Desktop/OsuGameDesktop.cs

@@ -9,6 +9,7 @@ using osu.Framework.Desktop.Platform;
 using osu.Desktop.Overlays;
 using System.Reflection;
 using System.Drawing;
+using System.IO;
 using System.Threading.Tasks;
 using osu.Game.Screens.Menu;
 
@@ -55,19 +56,29 @@ namespace osu.Desktop
         private void dragDrop(DragEventArgs e)
         {
             // this method will only be executed if e.Effect in dragEnter gets set to something other that None.
-            var dropData = e.Data.GetData(DataFormats.FileDrop) as object[];
+            var dropData = (object[])e.Data.GetData(DataFormats.FileDrop);
             var filePaths = dropData.Select(f => f.ToString()).ToArray();
-            Task.Run(() => BeatmapDatabase.Import(filePaths));
+
+            if (filePaths.All(f => Path.GetExtension(f) == @".osz"))
+                Task.Run(() => BeatmapDatabase.Import(filePaths));
+            else if (filePaths.All(f => Path.GetExtension(f) == @".osr"))
+                Task.Run(() =>
+                {
+                    var score = ScoreDatabase.ReadReplayFile(filePaths.First());
+                    Schedule(() => LoadScore(score));
+                });
         }
 
+        static readonly string[] allowed_extensions = { @".osz", @".osr" };
+
         private void dragEnter(DragEventArgs e)
         {
             // dragDrop will only be executed if e.Effect gets set to something other that None in this method.
             bool isFile = e.Data.GetDataPresent(DataFormats.FileDrop);
             if (isFile)
             {
-                var paths = (e.Data.GetData(DataFormats.FileDrop) as object[]).Select(f => f.ToString()).ToArray();
+                var paths = ((object[])e.Data.GetData(DataFormats.FileDrop)).Select(f => f.ToString()).ToArray();
-                if (paths.Any(p => !p.EndsWith(".osz")))
+                if (paths.Any(p => !allowed_extensions.Any(ext => p.EndsWith(ext))))
                     e.Effect = DragDropEffects.None;
                 else
                     e.Effect = DragDropEffects.Copy;

osu.Game/Database/BeatmapDatabase.cs

@@ -7,6 +7,7 @@ using System.IO;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Security.Cryptography;
+using osu.Framework.Extensions;
 using osu.Framework.Logging;
 using osu.Framework.Platform;
 using osu.Game.Beatmaps;
@@ -162,7 +163,7 @@ namespace osu.Game.Database
         /// <param name="path">Location on disk</param>
         public void Import(string path)
         {
-            Import(new [] { path });
+            Import(new[] { path });
         }
 
         /// <summary>
@@ -181,10 +182,9 @@ namespace osu.Game.Database
 
             if (File.Exists(path)) // Not always the case, i.e. for LegacyFilesystemReader
             {
-                using (var md5 = MD5.Create())
                 using (var input = storage.GetStream(path))
                 {
-                    hash = BitConverter.ToString(md5.ComputeHash(input)).Replace("-", "").ToLowerInvariant();
+                    hash = input.GetMd5Hash();
                     input.Seek(0, SeekOrigin.Begin);
                     path = Path.Combine(@"beatmaps", hash.Remove(1), hash.Remove(2), hash);
                     if (!storage.Exists(path))
@@ -216,22 +216,29 @@ namespace osu.Game.Database
                 Metadata = metadata
             };
 
-            using (var reader = ArchiveReader.GetReader(storage, path))
+            using (var archive = ArchiveReader.GetReader(storage, path))
             {
-                string[] mapNames = reader.BeatmapFilenames;
+                string[] mapNames = archive.BeatmapFilenames;
                 foreach (var name in mapNames)
-                    using (var stream = new StreamReader(reader.GetStream(name)))
+                    using (var raw = archive.GetStream(name))
+                    using (var ms = new MemoryStream()) //we need a memory stream so we can seek and shit
+                    using (var sr = new StreamReader(ms))
                     {
-                        var decoder = BeatmapDecoder.GetDecoder(stream);
+                        raw.CopyTo(ms);
-                        Beatmap beatmap = decoder.Decode(stream);
+                        ms.Position = 0;
+
+                        var decoder = BeatmapDecoder.GetDecoder(sr);
+                        Beatmap beatmap = decoder.Decode(sr);
+
                         beatmap.BeatmapInfo.Path = name;
+                        beatmap.BeatmapInfo.Hash = ms.GetMd5Hash();
 
                         // TODO: Diff beatmap metadata with set metadata and leave it here if necessary
                         beatmap.BeatmapInfo.Metadata = null;
 
                         beatmapSet.Beatmaps.Add(beatmap.BeatmapInfo);
                     }
-                beatmapSet.StoryboardFile = reader.StoryboardFilename;
+                beatmapSet.StoryboardFile = archive.StoryboardFilename;
             }
 
             return beatmapSet;

osu.Game/Database/BeatmapInfo.cs

@@ -39,6 +39,8 @@ namespace osu.Game.Database
 
         public string Path { get; set; }
 
+        public string Hash { get; set; }
+
         // General
         public int AudioLeadIn { get; set; }
         public bool Countdown { get; set; }
@@ -64,6 +66,7 @@ namespace osu.Game.Database
                 StoredBookmarks = string.Join(",", value);
             }
         }
+
         public double DistanceSpacing { get; set; }
         public int BeatDivisor { get; set; }
         public int GridSize { get; set; }

osu.Game/Database/ScoreDatabase.cs

@@ -0,0 +1,110 @@
+// 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.IO;
+using osu.Framework.Platform;
+using osu.Game.IO.Legacy;
+using osu.Game.IPC;
+using osu.Game.Modes;
+using SharpCompress.Compressors.LZMA;
+
+namespace osu.Game.Database
+{
+    public class ScoreDatabase
+    {
+        private readonly Storage storage;
+        private readonly BeatmapDatabase beatmaps;
+
+        private const string replay_folder = @"replays";
+
+        private ScoreIPCChannel ipc;
+
+        public ScoreDatabase(Storage storage, IIpcHost importHost = null, BeatmapDatabase beatmaps = null)
+        {
+            this.storage = storage;
+            this.beatmaps = beatmaps;
+
+            if (importHost != null)
+                ipc = new ScoreIPCChannel(importHost, this);
+        }
+
+        public Score ReadReplayFile(string replayFilename)
+        {
+            Score score;
+
+            using (Stream s = storage.GetStream(Path.Combine(replay_folder, replayFilename)))
+            using (SerializationReader sr = new SerializationReader(s))
+            {
+                var ruleset = Ruleset.GetRuleset((PlayMode)sr.ReadByte());
+                var processor = ruleset.CreateScoreProcessor();
+
+                score = processor.GetScore();
+
+                /* score.Pass = true;*/
+                var version = sr.ReadInt32();
+                /* score.FileChecksum = */
+                var beatmapHash = sr.ReadString();
+                score.Beatmap = beatmaps.Query<BeatmapInfo>().Where(b => b.Hash == beatmapHash).FirstOrDefault();
+                /* score.PlayerName = */
+                sr.ReadString();
+                /* var localScoreChecksum = */
+                sr.ReadString();
+                /* score.Count300 = */
+                sr.ReadUInt16();
+                /* score.Count100 = */
+                sr.ReadUInt16();
+                /* score.Count50 = */
+                sr.ReadUInt16();
+                /* score.CountGeki = */
+                sr.ReadUInt16();
+                /* score.CountKatu = */
+                sr.ReadUInt16();
+                /* score.CountMiss = */
+                sr.ReadUInt16();
+                score.TotalScore = sr.ReadInt32();
+                score.MaxCombo = sr.ReadUInt16();
+                /* score.Perfect = */
+                sr.ReadBoolean();
+                /* score.EnabledMods = (Mods)*/
+                sr.ReadInt32();
+                /* score.HpGraphString = */
+                sr.ReadString();
+                /* score.Date = */
+                sr.ReadDateTime();
+
+                var compressedReplay = sr.ReadByteArray();
+
+                if (version >= 20140721)
+                    /*OnlineId =*/
+                    sr.ReadInt64();
+                else if (version >= 20121008)
+                    /*OnlineId =*/
+                    sr.ReadInt32();
+
+                using (var replayInStream = new MemoryStream(compressedReplay))
+                {
+                    byte[] properties = new byte[5];
+                    if (replayInStream.Read(properties, 0, 5) != 5)
+                        throw (new Exception("input .lzma is too short"));
+                    long outSize = 0;
+                    for (int i = 0; i < 8; i++)
+                    {
+                        int v = replayInStream.ReadByte();
+                        if (v < 0)
+                            throw (new Exception("Can't Read 1"));
+                        outSize |= ((long)(byte)v) << (8 * i);
+                    }
+
+                    long compressedSize = replayInStream.Length - replayInStream.Position;
+
+                    using (var lzma = new LzmaStream(properties, replayInStream, compressedSize, outSize))
+                    using (var reader = new StreamReader(lzma))
+                        score.Replay = new LegacyReplay(reader);
+                }
+            }
+            
+            return score;
+        }
+    }
+}

osu.Game/IPC/ScoreIPCChannel.cs

@@ -0,0 +1,43 @@
+// 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.Diagnostics;
+using System.Threading.Tasks;
+using osu.Framework.Platform;
+using osu.Game.Database;
+
+namespace osu.Game.IPC
+{
+    public class ScoreIPCChannel : IpcChannel<ScoreImportMessage>
+    {
+        private ScoreDatabase scores;
+
+        public ScoreIPCChannel(IIpcHost host, ScoreDatabase scores = null)
+            : base(host)
+        {
+            this.scores = scores;
+            MessageReceived += (msg) =>
+            {
+                Debug.Assert(scores != null);
+                ImportAsync(msg.Path);
+            };
+        }
+
+        public async Task ImportAsync(string path)
+        {
+            if (scores == null)
+            {
+                //we want to contact a remote osu! to handle the import.
+                await SendMessageAsync(new ScoreImportMessage { Path = path });
+                return;
+            }
+
+            scores.ReadReplayFile(path);
+        }
+    }
+
+    public class ScoreImportMessage
+    {
+        public string Path;
+    }
+}

osu.Game/Modes/LegacyReplay.cs

@@ -0,0 +1,269 @@
+// 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.Collections.Generic;
+using System.IO;
+using osu.Framework.Input;
+using osu.Framework.MathUtils;
+using osu.Game.Input.Handlers;
+using osu.Game.IO.Legacy;
+using OpenTK;
+using OpenTK.Input;
+using KeyboardState = osu.Framework.Input.KeyboardState;
+using MouseState = osu.Framework.Input.MouseState;
+
+namespace osu.Game.Modes
+{
+    public class LegacyReplay : Replay
+    {
+        private List<LegacyReplayFrame> frames = new List<LegacyReplayFrame>();
+
+        public LegacyReplay(StreamReader reader)
+        {
+            float lastTime = 0;
+
+            foreach (var l in reader.ReadToEnd().Split(','))
+            {
+                var split = l.Split('|');
+
+                if (split.Length < 4 || float.Parse(split[0]) < 0) continue;
+
+                lastTime += float.Parse(split[0]);
+
+                frames.Add(new LegacyReplayFrame(
+                    lastTime,
+                    float.Parse(split[1]),
+                    384 - float.Parse(split[2]),
+                    (LegacyButtonState)int.Parse(split[3])
+                    ));
+            }
+        }
+
+        public override ReplayInputHandler GetInputHandler() => new LegacyReplayInputHandler(frames);
+
+        /// <summary>
+        /// The ReplayHandler will take a replay and handle the propagation of updates to the input stack.
+        /// It handles logic of any frames which *must* be executed.
+        /// </summary>
+        public class LegacyReplayInputHandler : ReplayInputHandler
+        {
+            private readonly List<LegacyReplayFrame> replayContent;
+            int currentFrameIndex;
+
+            public LegacyReplayFrame CurrentFrame => !hasFrames ? null : replayContent[currentFrameIndex];
+            public LegacyReplayFrame NextFrame => !hasFrames ? null : replayContent[MathHelper.Clamp(currentDirection > 0 ? currentFrameIndex + 1 : currentFrameIndex - 1, 0, replayContent.Count - 1)];
+
+            public LegacyReplayInputHandler(List<LegacyReplayFrame> replayContent)
+            {
+                this.replayContent = replayContent;
+            }
+
+            private bool nextFrame()
+            {
+                int newFrame = MathHelper.Clamp(currentFrameIndex + (currentDirection > 0 ? 1 : -1), 0, replayContent.Count - 1);
+
+                //ensure we aren't at an extent.
+                if (newFrame == currentFrameIndex) return false;
+
+                currentFrameIndex = newFrame;
+                return true;
+            }
+
+            public void SetPosition(Vector2 pos)
+            {
+            }
+
+            private Vector2? position
+            {
+                get
+                {
+                    if (!hasFrames)
+                        return null;
+
+                    if (AtLastFrame)
+                        return CurrentFrame.Position;
+
+                    return Interpolation.ValueAt(currentTime, CurrentFrame.Position, NextFrame.Position, CurrentFrame.Time, NextFrame.Time);
+                }
+            }
+
+            public override List<InputState> GetPendingStates()
+            {
+                return new List<InputState>
+                {
+                    new InputState
+                    {
+                        Mouse = new ReplayMouseState(
+                            ToScreenSpace(position ?? Vector2.Zero),
+                            new List<MouseState.ButtonState>
+                            {
+                                new MouseState.ButtonState(MouseButton.Left)
+                                {
+                                    State = CurrentFrame?.MouseLeft ?? false
+                                },
+                                new MouseState.ButtonState(MouseButton.Right)
+                                {
+                                    State = CurrentFrame?.MouseRight ?? false
+                                },
+                            }
+                        ),
+                        Keyboard = new ReplayKeyboardState(new List<Key>())
+                    }
+                };
+            }
+
+            public bool AtLastFrame => currentFrameIndex == replayContent.Count - 1;
+            public bool AtFirstFrame => currentFrameIndex == 0;
+
+            public Vector2 Size => new Vector2(512, 384);
+
+            private const double sixty_frame_time = 1000 / 60;
+
+            double currentTime;
+            int currentDirection;
+
+            /// <summary>
+            /// When set, we will ensure frames executed by nested drawables are frame-accurate to replay data.
+            /// Disabling this can make replay playback smoother (useful for autoplay, currently).
+            /// </summary>
+            public bool FrameAccuratePlayback = true;
+
+            private bool hasFrames => replayContent.Count > 0;
+
+            bool inImportantSection =>
+                FrameAccuratePlayback &&
+                //a button is in a pressed state
+                (currentDirection > 0 ? CurrentFrame : NextFrame)?.ButtonState > LegacyButtonState.None &&
+                //the next frame is within an allowable time span
+                Math.Abs(currentTime - NextFrame?.Time ?? 0) <= sixty_frame_time * 1.2;
+
+            /// <summary>
+            /// Update the current frame based on an incoming time value.
+            /// There are cases where we return a "must-use" time value that is different from the input.
+            /// This is to ensure accurate playback of replay data.
+            /// </summary>
+            /// <param name="time">The time which we should use for finding the current frame.</param>
+            /// <returns>The usable time value. If null, we shouldn't be running components reliant on this data.</returns>
+            public override double? SetFrameFromTime(double time)
+            {
+                currentDirection = time.CompareTo(currentTime);
+                if (currentDirection == 0) currentDirection = 1;
+
+                if (hasFrames)
+                {
+                    //if we changed frames, we want to execute once *exactly* on the frame's time.
+                    if (currentDirection == time.CompareTo(NextFrame.Time) && nextFrame())
+                        return currentTime = CurrentFrame.Time;
+
+                    //if we didn't change frames, we need to ensure we are allowed to run frames in between, else return null.
+                    if (inImportantSection)
+                        return null;
+                }
+
+                return currentTime = time;
+            }
+
+            private class ReplayMouseState : MouseState
+            {
+                public ReplayMouseState(Vector2 position, List<ButtonState> list)
+                {
+                    Position = position;
+                    ButtonStates = list;
+                }
+            }
+
+            private class ReplayKeyboardState : KeyboardState
+            {
+                public ReplayKeyboardState(List<Key> keys)
+                {
+                    Keys = keys;
+                }
+            }
+        }
+
+        [Flags]
+        public enum LegacyButtonState
+        {
+            None = 0,
+            Left1 = 1,
+            Right1 = 2,
+            Left2 = 4,
+            Right2 = 8,
+            Smoke = 16
+        }
+
+        public class LegacyReplayFrame
+        {
+            public Vector2 Position => new Vector2(MouseX, MouseY);
+
+            public float MouseX;
+            public float MouseY;
+            public bool MouseLeft;
+            public bool MouseRight;
+            public bool MouseLeft1;
+            public bool MouseRight1;
+            public bool MouseLeft2;
+            public bool MouseRight2;
+            public LegacyButtonState ButtonState;
+            public double Time;
+
+            public LegacyReplayFrame(double time, float posX, float posY, LegacyButtonState buttonState)
+            {
+                MouseX = posX;
+                MouseY = posY;
+                ButtonState = buttonState;
+                SetButtonStates(buttonState);
+                Time = time;
+            }
+
+            public void SetButtonStates(LegacyButtonState buttonState)
+            {
+                ButtonState = buttonState;
+                MouseLeft = (buttonState & (LegacyButtonState.Left1 | LegacyButtonState.Left2)) > 0;
+                MouseLeft1 = (buttonState & LegacyButtonState.Left1) > 0;
+                MouseLeft2 = (buttonState & LegacyButtonState.Left2) > 0;
+                MouseRight = (buttonState & (LegacyButtonState.Right1 | LegacyButtonState.Right2)) > 0;
+                MouseRight1 = (buttonState & LegacyButtonState.Right1) > 0;
+                MouseRight2 = (buttonState & LegacyButtonState.Right2) > 0;
+            }
+
+            public LegacyReplayFrame(Stream s) : this(new SerializationReader(s))
+            {
+            }
+
+            public LegacyReplayFrame(SerializationReader sr)
+            {
+                ButtonState = (LegacyButtonState)sr.ReadByte();
+                SetButtonStates(ButtonState);
+
+                byte bt = sr.ReadByte();
+                if (bt > 0)//Handle Pre-Taiko compatible replays.
+                    SetButtonStates(LegacyButtonState.Right1);
+
+                MouseX = sr.ReadSingle();
+                MouseY = sr.ReadSingle();
+                Time = sr.ReadInt32();
+            }
+
+            public void ReadFromStream(SerializationReader sr)
+            {
+                throw new System.NotImplementedException();
+            }
+
+            public void WriteToStream(SerializationWriter sw)
+            {
+                sw.Write((byte)ButtonState);
+                sw.Write((byte)0);
+                sw.Write(MouseX);
+                sw.Write(MouseY);
+                sw.Write(Time);
+            }
+
+            public override string ToString()
+            {
+                return $"{Time}\t({MouseX},{MouseY})\t{MouseLeft}\t{MouseRight}\t{MouseLeft1}\t{MouseRight1}\t{MouseLeft2}\t{MouseRight2}\t{ButtonState}";
+            }
+        }
+    }
+}

osu.Game/Modes/Replay.cs

@@ -0,0 +1,12 @@
+// 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.Input.Handlers;
+
+namespace osu.Game.Modes
+{
+    public abstract class Replay
+    {
+        public virtual ReplayInputHandler GetInputHandler() => null;
+    }
+}

osu.Game/Modes/Score.cs

@@ -2,7 +2,8 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using osu.Framework.Input.Handlers;
-using osu.Game.Input.Handlers;
+using osu.Game.Database;
+using SQLite.Net;
 
 namespace osu.Game.Modes
 {
@@ -15,10 +16,6 @@ namespace osu.Game.Modes
         public double Health { get; set; }
 
         public Replay Replay;
-    }
+        public BeatmapInfo Beatmap;
-
-    public class Replay
-    {
-        public virtual ReplayInputHandler GetInputHandler() => null;
     }
 }

osu.Game/OsuGame.cs

@@ -24,9 +24,10 @@ using osu.Game.Screens.Menu;
 using OpenTK;
 using System.Linq;
 using osu.Framework.Graphics.Primitives;
-using System.Collections.Generic;
 using System.Threading.Tasks;
+using osu.Game.Graphics;
 using osu.Game.Overlays.Notifications;
+using osu.Game.Screens.Play;
 
 namespace osu.Game
 {
@@ -92,6 +93,39 @@ namespace osu.Game
             PlayMode = LocalConfig.GetBindable<PlayMode>(OsuConfig.PlayMode);
         }
 
+        protected void LoadScore(Score s)
+        {
+            var menu = intro.ChildScreen;
+
+            if (menu == null)
+            {
+                Schedule(() => LoadScore(s));
+                return;
+            }
+
+            if (!menu.IsCurrentScreen)
+            {
+                menu.MakeCurrent();
+                Delay(500);
+                Schedule(() => LoadScore(s));
+                return;
+            }
+
+            if (s.Beatmap == null)
+            {
+                notificationManager.Post(new SimpleNotification
+                {
+                    Text = @"Tried to load a score for a beatmap we don't have!",
+                    Icon = FontAwesome.fa_life_saver,
+                });
+                return;
+            }
+
+            Beatmap.Value = BeatmapDatabase.GetWorkingBeatmap(s.Beatmap);
+
+            menu.Push(new PlayerLoader(new Player { ReplayInputHandler = s.Replay.GetInputHandler() }));
+        }
+
         protected override void LoadComplete()
         {
             base.LoadComplete();

osu.Game/OsuGameBase.cs

@@ -25,6 +25,8 @@ namespace osu.Game
 
         protected BeatmapDatabase BeatmapDatabase;
 
+        protected ScoreDatabase ScoreDatabase;
+
         protected override string MainResourceFile => @"osu.Game.Resources.dll";
 
         public APIAccess API;
@@ -43,6 +45,7 @@ namespace osu.Game
             Dependencies.Cache(this);
             Dependencies.Cache(LocalConfig);
             Dependencies.Cache(BeatmapDatabase = new BeatmapDatabase(Host.Storage, Host));
+            Dependencies.Cache(ScoreDatabase = new ScoreDatabase(Host.Storage, Host, BeatmapDatabase));
             Dependencies.Cache(new OsuColour());
 
             //this completely overrides the framework default. will need to change once we make a proper FontStore.

osu.Game/app.config

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+-->
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-9.0.0.0" newVersion="9.0.0.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>

osu.Game/osu.Game.csproj

@@ -43,6 +43,10 @@
       <HintPath>$(SolutionDir)\packages\ppy.OpenTK.2.0.50727.1340\lib\net45\OpenTK.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="SharpCompress, Version=0.15.1.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
+      <HintPath>..\packages\SharpCompress.0.15.1\lib\net45\SharpCompress.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="SQLite.Net, Version=3.1.0.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>$(SolutionDir)\packages\SQLite.Net.Core-PCL.3.1.1\lib\portable-win8+net45+wp8+wpa81+MonoAndroid1+MonoTouch1\SQLite.Net.dll</HintPath>
       <Private>True</Private>
@@ -69,6 +73,7 @@
   <ItemGroup>
     <Compile Include="Beatmaps\Drawables\BeatmapBackgroundSprite.cs" />
     <Compile Include="Beatmaps\DifficultyCalculator.cs" />
+    <Compile Include="Database\ScoreDatabase.cs" />
     <Compile Include="Graphics\Backgrounds\Triangles.cs" />
     <Compile Include="Graphics\Cursor\CursorTrail.cs" />
     <Compile Include="Graphics\Sprites\OsuSpriteText.cs" />
@@ -83,9 +88,12 @@
     <Compile Include="IO\Legacy\ILegacySerializable.cs" />
     <Compile Include="IO\Legacy\SerializationReader.cs" />
     <Compile Include="IO\Legacy\SerializationWriter.cs" />
+    <Compile Include="IPC\ScoreIPCChannel.cs" />
+    <Compile Include="Modes\LegacyReplay.cs" />
     <Compile Include="Modes\Objects\Drawables\IDrawableHitObjectWithProxiedApproach.cs" />
     <Compile Include="Modes\Objects\HitObjectParser.cs" />
     <Compile Include="Modes\Objects\NullHitObjectParser.cs" />
+    <Compile Include="Modes\Replay.cs" />
     <Compile Include="Modes\Score.cs" />
     <Compile Include="Modes\ScoreProcesssor.cs" />
     <Compile Include="Modes\UI\HealthDisplay.cs" />
@@ -329,6 +337,7 @@
     <None Include="..\osu.licenseheader">
       <Link>osu.licenseheader</Link>
     </None>
+    <None Include="app.config" />
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup />

osu.Game/packages.config

@@ -7,6 +7,7 @@ Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/maste
   <package id="DotNetZip" version="1.10.1" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
   <package id="ppy.OpenTK" version="2.0.50727.1340" targetFramework="net45" />
+  <package id="SharpCompress" version="0.15.1" targetFramework="net45" />
   <package id="SQLite.Net.Core-PCL" version="3.1.1" targetFramework="net45" />
   <package id="SQLite.Net-PCL" version="3.1.1" targetFramework="net45" />
   <package id="SQLiteNetExtensions" version="1.3.0" targetFramework="net45" />