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298 lines
12 KiB
C#
298 lines
12 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using System.IO;
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using System.Linq;
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using osu.Game.Beatmaps;
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using osu.Game.Beatmaps.Formats;
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using osu.Game.Beatmaps.Legacy;
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using osu.Game.IO.Legacy;
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using osu.Game.Replays;
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using osu.Game.Replays.Legacy;
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using osu.Game.Rulesets;
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using osu.Game.Rulesets.Mods;
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using osu.Game.Rulesets.Replays;
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using osu.Game.Rulesets.Scoring;
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using osu.Game.Users;
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using SharpCompress.Compressors.LZMA;
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namespace osu.Game.Scoring.Legacy
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{
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public abstract class LegacyScoreDecoder
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{
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private IBeatmap currentBeatmap;
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private Ruleset currentRuleset;
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public Score Parse(Stream stream)
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{
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var score = new Score
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{
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ScoreInfo = new ScoreInfo(),
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Replay = new Replay()
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};
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using (SerializationReader sr = new SerializationReader(stream))
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{
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currentRuleset = GetRuleset(sr.ReadByte());
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var scoreInfo = new ScoreInfo { Ruleset = currentRuleset.RulesetInfo };
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score.ScoreInfo = scoreInfo;
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var version = sr.ReadInt32();
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var workingBeatmap = GetBeatmap(sr.ReadString());
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if (workingBeatmap is DummyWorkingBeatmap)
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throw new BeatmapNotFoundException();
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currentBeatmap = workingBeatmap.Beatmap;
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scoreInfo.Beatmap = currentBeatmap.BeatmapInfo;
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scoreInfo.User = new User { Username = sr.ReadString() };
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// MD5Hash
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sr.ReadString();
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scoreInfo.SetCount300(sr.ReadUInt16());
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scoreInfo.SetCount100(sr.ReadUInt16());
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scoreInfo.SetCount50(sr.ReadUInt16());
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scoreInfo.SetCountGeki(sr.ReadUInt16());
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scoreInfo.SetCountKatu(sr.ReadUInt16());
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scoreInfo.SetCountMiss(sr.ReadUInt16());
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scoreInfo.TotalScore = sr.ReadInt32();
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scoreInfo.MaxCombo = sr.ReadUInt16();
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/* score.Perfect = */
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sr.ReadBoolean();
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scoreInfo.Mods = currentRuleset.ConvertFromLegacyMods((LegacyMods)sr.ReadInt32()).ToArray();
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/* score.HpGraphString = */
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sr.ReadString();
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scoreInfo.Date = sr.ReadDateTime();
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var compressedReplay = sr.ReadByteArray();
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if (version >= 20140721)
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scoreInfo.OnlineScoreID = sr.ReadInt64();
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else if (version >= 20121008)
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scoreInfo.OnlineScoreID = sr.ReadInt32();
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if (scoreInfo.OnlineScoreID <= 0)
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scoreInfo.OnlineScoreID = null;
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if (compressedReplay?.Length > 0)
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{
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using (var replayInStream = new MemoryStream(compressedReplay))
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{
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byte[] properties = new byte[5];
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if (replayInStream.Read(properties, 0, 5) != 5)
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throw new IOException("input .lzma is too short");
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long outSize = 0;
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for (int i = 0; i < 8; i++)
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{
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int v = replayInStream.ReadByte();
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if (v < 0)
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throw new IOException("Can't Read 1");
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outSize |= (long)(byte)v << (8 * i);
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}
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long compressedSize = replayInStream.Length - replayInStream.Position;
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using (var lzma = new LzmaStream(properties, replayInStream, compressedSize, outSize))
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using (var reader = new StreamReader(lzma))
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readLegacyReplay(score.Replay, reader);
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}
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}
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}
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CalculateAccuracy(score.ScoreInfo);
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return score;
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}
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protected void CalculateAccuracy(ScoreInfo score)
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{
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score.Statistics.TryGetValue(HitResult.Miss, out int countMiss);
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score.Statistics.TryGetValue(HitResult.Meh, out int count50);
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score.Statistics.TryGetValue(HitResult.Good, out int count100);
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score.Statistics.TryGetValue(HitResult.Great, out int count300);
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score.Statistics.TryGetValue(HitResult.Perfect, out int countGeki);
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score.Statistics.TryGetValue(HitResult.Ok, out int countKatu);
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switch (score.Ruleset.ID)
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{
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case 0:
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{
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int totalHits = count50 + count100 + count300 + countMiss;
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score.Accuracy = totalHits > 0 ? (double)(count50 * 50 + count100 * 100 + count300 * 300) / (totalHits * 300) : 1;
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float ratio300 = (float)count300 / totalHits;
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float ratio50 = (float)count50 / totalHits;
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if (ratio300 == 1)
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score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.XH : ScoreRank.X;
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else if (ratio300 > 0.9 && ratio50 <= 0.01 && countMiss == 0)
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score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.SH : ScoreRank.S;
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else if ((ratio300 > 0.8 && countMiss == 0) || ratio300 > 0.9)
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score.Rank = ScoreRank.A;
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else if ((ratio300 > 0.7 && countMiss == 0) || ratio300 > 0.8)
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score.Rank = ScoreRank.B;
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else if (ratio300 > 0.6)
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score.Rank = ScoreRank.C;
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else
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score.Rank = ScoreRank.D;
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break;
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}
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case 1:
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{
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int totalHits = count50 + count100 + count300 + countMiss;
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score.Accuracy = totalHits > 0 ? (double)(count100 * 150 + count300 * 300) / (totalHits * 300) : 1;
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float ratio300 = (float)count300 / totalHits;
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float ratio50 = (float)count50 / totalHits;
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if (ratio300 == 1)
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score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.XH : ScoreRank.X;
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else if (ratio300 > 0.9 && ratio50 <= 0.01 && countMiss == 0)
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score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.SH : ScoreRank.S;
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else if ((ratio300 > 0.8 && countMiss == 0) || ratio300 > 0.9)
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score.Rank = ScoreRank.A;
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else if ((ratio300 > 0.7 && countMiss == 0) || ratio300 > 0.8)
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score.Rank = ScoreRank.B;
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else if (ratio300 > 0.6)
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score.Rank = ScoreRank.C;
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else
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score.Rank = ScoreRank.D;
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break;
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}
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case 2:
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{
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int totalHits = count50 + count100 + count300 + countMiss + countKatu;
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score.Accuracy = totalHits > 0 ? (double)(count50 + count100 + count300) / totalHits : 1;
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if (score.Accuracy == 1)
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score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.XH : ScoreRank.X;
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else if (score.Accuracy > 0.98)
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score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.SH : ScoreRank.S;
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else if (score.Accuracy > 0.94)
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score.Rank = ScoreRank.A;
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else if (score.Accuracy > 0.9)
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score.Rank = ScoreRank.B;
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else if (score.Accuracy > 0.85)
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score.Rank = ScoreRank.C;
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else
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score.Rank = ScoreRank.D;
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break;
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}
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case 3:
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{
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int totalHits = count50 + count100 + count300 + countMiss + countGeki + countKatu;
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score.Accuracy = totalHits > 0 ? (double)(count50 * 50 + count100 * 100 + countKatu * 200 + (count300 + countGeki) * 300) / (totalHits * 300) : 1;
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if (score.Accuracy == 1)
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score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.XH : ScoreRank.X;
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else if (score.Accuracy > 0.95)
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score.Rank = score.Mods.Any(m => m is ModHidden || m is ModFlashlight) ? ScoreRank.SH : ScoreRank.S;
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else if (score.Accuracy > 0.9)
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score.Rank = ScoreRank.A;
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else if (score.Accuracy > 0.8)
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score.Rank = ScoreRank.B;
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else if (score.Accuracy > 0.7)
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score.Rank = ScoreRank.C;
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else
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score.Rank = ScoreRank.D;
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break;
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}
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}
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}
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private void readLegacyReplay(Replay replay, StreamReader reader)
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{
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float lastTime = 0;
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ReplayFrame currentFrame = null;
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var frames = reader.ReadToEnd().Split(',');
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for (var i = 0; i < frames.Length; i++)
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{
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var split = frames[i].Split('|');
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if (split.Length < 4)
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continue;
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if (split[0] == "-12345")
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{
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// Todo: The seed is provided in split[3], which we'll need to use at some point
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continue;
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}
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var diff = Parsing.ParseFloat(split[0]);
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lastTime += diff;
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if (i == 0 && diff == 0)
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// osu-stable adds a zero-time frame before potentially valid negative user frames.
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// we need to ignore this.
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continue;
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// Todo: At some point we probably want to rewind and play back the negative-time frames
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// but for now we'll achieve equal playback to stable by skipping negative frames
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if (diff < 0)
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continue;
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currentFrame = convertFrame(new LegacyReplayFrame(lastTime,
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Parsing.ParseFloat(split[1], Parsing.MAX_COORDINATE_VALUE),
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Parsing.ParseFloat(split[2], Parsing.MAX_COORDINATE_VALUE),
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(ReplayButtonState)Parsing.ParseInt(split[3])), currentFrame);
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replay.Frames.Add(currentFrame);
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}
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}
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private ReplayFrame convertFrame(LegacyReplayFrame currentFrame, ReplayFrame lastFrame)
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{
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var convertible = currentRuleset.CreateConvertibleReplayFrame();
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if (convertible == null)
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throw new InvalidOperationException($"Legacy replay cannot be converted for the ruleset: {currentRuleset.Description}");
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convertible.ConvertFrom(currentFrame, currentBeatmap, lastFrame);
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var frame = (ReplayFrame)convertible;
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frame.Time = currentFrame.Time;
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return frame;
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}
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/// <summary>
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/// Retrieves the <see cref="Ruleset"/> for a specific id.
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/// </summary>
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/// <param name="rulesetId">The id.</param>
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/// <returns>The <see cref="Ruleset"/>.</returns>
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protected abstract Ruleset GetRuleset(int rulesetId);
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/// <summary>
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/// Retrieves the <see cref="WorkingBeatmap"/> corresponding to an MD5 hash.
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/// </summary>
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/// <param name="md5Hash">The MD5 hash.</param>
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/// <returns>The <see cref="WorkingBeatmap"/>.</returns>
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protected abstract WorkingBeatmap GetBeatmap(string md5Hash);
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public class BeatmapNotFoundException : Exception
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{
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public BeatmapNotFoundException()
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: base("No corresponding beatmap for the score could be found.")
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{
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}
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}
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}
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}
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