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osu-lazer/osu.Game/Scoring/Legacy/LegacyScoreDecoder.cs
2021-12-10 16:11:48 +09:00

313 lines
13 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.IO;
using System.Linq;
using osu.Game.Beatmaps;
using osu.Game.Beatmaps.Formats;
using osu.Game.Beatmaps.Legacy;
using osu.Game.IO.Legacy;
using osu.Game.Online.API.Requests.Responses;
using osu.Game.Replays;
using osu.Game.Replays.Legacy;
using osu.Game.Rulesets;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Replays;
using SharpCompress.Compressors.LZMA;
namespace osu.Game.Scoring.Legacy
{
public abstract class LegacyScoreDecoder
{
private IBeatmap currentBeatmap;
private Ruleset currentRuleset;
public Score Parse(Stream stream)
{
var score = new Score
{
Replay = new Replay()
};
WorkingBeatmap workingBeatmap;
using (SerializationReader sr = new SerializationReader(stream))
{
currentRuleset = GetRuleset(sr.ReadByte());
var scoreInfo = new ScoreInfo { Ruleset = currentRuleset.RulesetInfo };
score.ScoreInfo = scoreInfo;
int version = sr.ReadInt32();
workingBeatmap = GetBeatmap(sr.ReadString());
if (workingBeatmap is DummyWorkingBeatmap)
throw new BeatmapNotFoundException();
scoreInfo.User = new APIUser { Username = sr.ReadString() };
// MD5Hash
sr.ReadString();
scoreInfo.SetCount300(sr.ReadUInt16());
scoreInfo.SetCount100(sr.ReadUInt16());
scoreInfo.SetCount50(sr.ReadUInt16());
scoreInfo.SetCountGeki(sr.ReadUInt16());
scoreInfo.SetCountKatu(sr.ReadUInt16());
scoreInfo.SetCountMiss(sr.ReadUInt16());
scoreInfo.TotalScore = sr.ReadInt32();
scoreInfo.MaxCombo = sr.ReadUInt16();
/* score.Perfect = */
sr.ReadBoolean();
scoreInfo.Mods = currentRuleset.ConvertFromLegacyMods((LegacyMods)sr.ReadInt32()).ToArray();
// lazer replays get a really high version number.
if (version < LegacyScoreEncoder.FIRST_LAZER_VERSION)
scoreInfo.Mods = scoreInfo.Mods.Append(currentRuleset.CreateMod<ModClassic>()).ToArray();
currentBeatmap = workingBeatmap.GetPlayableBeatmap(currentRuleset.RulesetInfo, scoreInfo.Mods);
scoreInfo.BeatmapInfo = currentBeatmap.BeatmapInfo;
/* score.HpGraphString = */
sr.ReadString();
scoreInfo.Date = sr.ReadDateTime();
byte[] compressedReplay = sr.ReadByteArray();
if (version >= 20140721)
scoreInfo.OnlineID = sr.ReadInt64();
else if (version >= 20121008)
scoreInfo.OnlineID = sr.ReadInt32();
if (compressedReplay?.Length > 0)
{
using (var replayInStream = new MemoryStream(compressedReplay))
{
byte[] properties = new byte[5];
if (replayInStream.Read(properties, 0, 5) != 5)
throw new IOException("input .lzma is too short");
long outSize = 0;
for (int i = 0; i < 8; i++)
{
int v = replayInStream.ReadByte();
if (v < 0)
throw new IOException("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))
readLegacyReplay(score.Replay, reader);
}
}
}
PopulateAccuracy(score.ScoreInfo);
// before returning for database import, we must restore the database-sourced BeatmapInfo.
// if not, the clone operation in GetPlayableBeatmap will cause a dereference and subsequent database exception.
score.ScoreInfo.BeatmapInfo = workingBeatmap.BeatmapInfo;
return score;
}
/// <summary>
/// Populates the accuracy of a given <see cref="ScoreInfo"/> from its contained statistics.
/// </summary>
/// <remarks>
/// Legacy use only.
/// </remarks>
/// <param name="score">The <see cref="ScoreInfo"/> to populate.</param>
public static void PopulateAccuracy(ScoreInfo score)
{
int countMiss = score.GetCountMiss() ?? 0;
int count50 = score.GetCount50() ?? 0;
int count100 = score.GetCount100() ?? 0;
int count300 = score.GetCount300() ?? 0;
int countGeki = score.GetCountGeki() ?? 0;
int countKatu = score.GetCountKatu() ?? 0;
switch (score.Ruleset.OnlineID)
{
case 0:
{
int totalHits = count50 + count100 + count300 + countMiss;
score.Accuracy = totalHits > 0 ? (double)(count50 * 50 + count100 * 100 + count300 * 300) / (totalHits * 300) : 1;
float ratio300 = (float)count300 / totalHits;
float ratio50 = (float)count50 / totalHits;
if (ratio300 == 1)
score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.XH : ScoreRank.X;
else if (ratio300 > 0.9 && ratio50 <= 0.01 && countMiss == 0)
score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.SH : ScoreRank.S;
else if ((ratio300 > 0.8 && countMiss == 0) || ratio300 > 0.9)
score.Rank = ScoreRank.A;
else if ((ratio300 > 0.7 && countMiss == 0) || ratio300 > 0.8)
score.Rank = ScoreRank.B;
else if (ratio300 > 0.6)
score.Rank = ScoreRank.C;
else
score.Rank = ScoreRank.D;
break;
}
case 1:
{
int totalHits = count50 + count100 + count300 + countMiss;
score.Accuracy = totalHits > 0 ? (double)(count100 * 150 + count300 * 300) / (totalHits * 300) : 1;
float ratio300 = (float)count300 / totalHits;
float ratio50 = (float)count50 / totalHits;
if (ratio300 == 1)
score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.XH : ScoreRank.X;
else if (ratio300 > 0.9 && ratio50 <= 0.01 && countMiss == 0)
score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.SH : ScoreRank.S;
else if ((ratio300 > 0.8 && countMiss == 0) || ratio300 > 0.9)
score.Rank = ScoreRank.A;
else if ((ratio300 > 0.7 && countMiss == 0) || ratio300 > 0.8)
score.Rank = ScoreRank.B;
else if (ratio300 > 0.6)
score.Rank = ScoreRank.C;
else
score.Rank = ScoreRank.D;
break;
}
case 2:
{
int totalHits = count50 + count100 + count300 + countMiss + countKatu;
score.Accuracy = totalHits > 0 ? (double)(count50 + count100 + count300) / totalHits : 1;
if (score.Accuracy == 1)
score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.XH : ScoreRank.X;
else if (score.Accuracy > 0.98)
score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.SH : ScoreRank.S;
else if (score.Accuracy > 0.94)
score.Rank = ScoreRank.A;
else if (score.Accuracy > 0.9)
score.Rank = ScoreRank.B;
else if (score.Accuracy > 0.85)
score.Rank = ScoreRank.C;
else
score.Rank = ScoreRank.D;
break;
}
case 3:
{
int totalHits = count50 + count100 + count300 + countMiss + countGeki + countKatu;
score.Accuracy = totalHits > 0 ? (double)(count50 * 50 + count100 * 100 + countKatu * 200 + (count300 + countGeki) * 300) / (totalHits * 300) : 1;
if (score.Accuracy == 1)
score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.XH : ScoreRank.X;
else if (score.Accuracy > 0.95)
score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.SH : ScoreRank.S;
else if (score.Accuracy > 0.9)
score.Rank = ScoreRank.A;
else if (score.Accuracy > 0.8)
score.Rank = ScoreRank.B;
else if (score.Accuracy > 0.7)
score.Rank = ScoreRank.C;
else
score.Rank = ScoreRank.D;
break;
}
}
}
private void readLegacyReplay(Replay replay, StreamReader reader)
{
float lastTime = 0;
ReplayFrame currentFrame = null;
string[] frames = reader.ReadToEnd().Split(',');
for (int i = 0; i < frames.Length; i++)
{
string[] split = frames[i].Split('|');
if (split.Length < 4)
continue;
if (split[0] == "-12345")
{
// Todo: The seed is provided in split[3], which we'll need to use at some point
continue;
}
float diff = Parsing.ParseFloat(split[0]);
float mouseX = Parsing.ParseFloat(split[1], Parsing.MAX_COORDINATE_VALUE);
float mouseY = Parsing.ParseFloat(split[2], Parsing.MAX_COORDINATE_VALUE);
lastTime += diff;
if (i < 2 && mouseX == 256 && mouseY == -500)
// at the start of the replay, stable places two replay frames, at time 0 and SkipBoundary - 1, respectively.
// both frames use a position of (256, -500).
// ignore these frames as they serve no real purpose (and can even mislead ruleset-specific handlers - see mania)
continue;
// Todo: At some point we probably want to rewind and play back the negative-time frames
// but for now we'll achieve equal playback to stable by skipping negative frames
if (diff < 0)
continue;
currentFrame = convertFrame(new LegacyReplayFrame(lastTime,
mouseX,
mouseY,
(ReplayButtonState)Parsing.ParseInt(split[3])), currentFrame);
replay.Frames.Add(currentFrame);
}
}
private ReplayFrame convertFrame(LegacyReplayFrame currentFrame, ReplayFrame lastFrame)
{
var convertible = currentRuleset.CreateConvertibleReplayFrame();
if (convertible == null)
throw new InvalidOperationException($"Legacy replay cannot be converted for the ruleset: {currentRuleset.Description}");
convertible.FromLegacy(currentFrame, currentBeatmap, lastFrame);
var frame = (ReplayFrame)convertible;
frame.Time = currentFrame.Time;
return frame;
}
/// <summary>
/// Retrieves the <see cref="Ruleset"/> for a specific id.
/// </summary>
/// <param name="rulesetId">The id.</param>
/// <returns>The <see cref="Ruleset"/>.</returns>
protected abstract Ruleset GetRuleset(int rulesetId);
/// <summary>
/// Retrieves the <see cref="WorkingBeatmap"/> corresponding to an MD5 hash.
/// </summary>
/// <param name="md5Hash">The MD5 hash.</param>
/// <returns>The <see cref="WorkingBeatmap"/>.</returns>
protected abstract WorkingBeatmap GetBeatmap(string md5Hash);
public class BeatmapNotFoundException : Exception
{
public BeatmapNotFoundException()
: base("No corresponding beatmap for the score could be found.")
{
}
}
}
}