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436 lines
16 KiB
C#
436 lines
16 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 osuTK;
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using osu.Game.Rulesets.Objects.Types;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using osu.Game.Beatmaps.Formats;
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using osu.Game.Audio;
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using System.Linq;
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using JetBrains.Annotations;
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using osu.Framework.MathUtils;
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using osu.Game.Beatmaps.Legacy;
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namespace osu.Game.Rulesets.Objects.Legacy
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{
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/// <summary>
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/// A HitObjectParser to parse legacy Beatmaps.
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/// </summary>
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public abstract class ConvertHitObjectParser : HitObjectParser
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{
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/// <summary>
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/// The offset to apply to all time values.
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/// </summary>
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protected readonly double Offset;
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/// <summary>
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/// The beatmap version.
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/// </summary>
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protected readonly int FormatVersion;
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protected bool FirstObject { get; private set; } = true;
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protected ConvertHitObjectParser(double offset, int formatVersion)
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{
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Offset = offset;
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FormatVersion = formatVersion;
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}
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[CanBeNull]
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public override HitObject Parse(string text)
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{
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string[] split = text.Split(',');
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Vector2 pos = new Vector2((int)Parsing.ParseFloat(split[0], Parsing.MAX_COORDINATE_VALUE), (int)Parsing.ParseFloat(split[1], Parsing.MAX_COORDINATE_VALUE));
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double startTime = Parsing.ParseDouble(split[2]) + Offset;
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LegacyHitObjectType type = (LegacyHitObjectType)Parsing.ParseInt(split[3]);
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int comboOffset = (int)(type & LegacyHitObjectType.ComboOffset) >> 4;
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type &= ~LegacyHitObjectType.ComboOffset;
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bool combo = type.HasFlag(LegacyHitObjectType.NewCombo);
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type &= ~LegacyHitObjectType.NewCombo;
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var soundType = (LegacyHitSoundType)Parsing.ParseInt(split[4]);
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var bankInfo = new SampleBankInfo();
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HitObject result = null;
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if (type.HasFlag(LegacyHitObjectType.Circle))
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{
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result = CreateHit(pos, combo, comboOffset);
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if (split.Length > 5)
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readCustomSampleBanks(split[5], bankInfo);
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}
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else if (type.HasFlag(LegacyHitObjectType.Slider))
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{
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PathType pathType = PathType.Catmull;
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double? length = null;
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string[] pointSplit = split[5].Split('|');
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int pointCount = 1;
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foreach (var t in pointSplit)
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{
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if (t.Length > 1)
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pointCount++;
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}
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var points = new Vector2[pointCount];
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int pointIndex = 1;
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foreach (string t in pointSplit)
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{
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if (t.Length == 1)
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{
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switch (t)
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{
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case @"C":
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pathType = PathType.Catmull;
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break;
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case @"B":
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pathType = PathType.Bezier;
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break;
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case @"L":
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pathType = PathType.Linear;
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break;
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case @"P":
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pathType = PathType.PerfectCurve;
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break;
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}
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continue;
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}
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string[] temp = t.Split(':');
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points[pointIndex++] = new Vector2((int)Parsing.ParseDouble(temp[0], Parsing.MAX_COORDINATE_VALUE), (int)Parsing.ParseDouble(temp[1], Parsing.MAX_COORDINATE_VALUE)) - pos;
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}
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int repeatCount = Parsing.ParseInt(split[6]);
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if (repeatCount > 9000)
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throw new FormatException(@"Repeat count is way too high");
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// osu-stable treated the first span of the slider as a repeat, but no repeats are happening
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repeatCount = Math.Max(0, repeatCount - 1);
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if (split.Length > 7)
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{
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length = Math.Max(0, Parsing.ParseDouble(split[7]));
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if (length == 0)
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length = null;
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}
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if (split.Length > 10)
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readCustomSampleBanks(split[10], bankInfo);
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// One node for each repeat + the start and end nodes
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int nodes = repeatCount + 2;
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// Populate node sample bank infos with the default hit object sample bank
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var nodeBankInfos = new List<SampleBankInfo>();
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for (int i = 0; i < nodes; i++)
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nodeBankInfos.Add(bankInfo.Clone());
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// Read any per-node sample banks
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if (split.Length > 9 && split[9].Length > 0)
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{
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string[] sets = split[9].Split('|');
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for (int i = 0; i < nodes; i++)
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{
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if (i >= sets.Length)
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break;
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SampleBankInfo info = nodeBankInfos[i];
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readCustomSampleBanks(sets[i], info);
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}
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}
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// Populate node sound types with the default hit object sound type
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var nodeSoundTypes = new List<LegacyHitSoundType>();
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for (int i = 0; i < nodes; i++)
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nodeSoundTypes.Add(soundType);
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// Read any per-node sound types
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if (split.Length > 8 && split[8].Length > 0)
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{
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string[] adds = split[8].Split('|');
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for (int i = 0; i < nodes; i++)
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{
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if (i >= adds.Length)
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break;
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int.TryParse(adds[i], out var sound);
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nodeSoundTypes[i] = (LegacyHitSoundType)sound;
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}
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}
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// Generate the final per-node samples
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var nodeSamples = new List<IList<HitSampleInfo>>(nodes);
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for (int i = 0; i < nodes; i++)
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nodeSamples.Add(convertSoundType(nodeSoundTypes[i], nodeBankInfos[i]));
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result = CreateSlider(pos, combo, comboOffset, convertControlPoints(points, pathType), length, repeatCount, nodeSamples);
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// The samples are played when the slider ends, which is the last node
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result.Samples = nodeSamples[^1];
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}
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else if (type.HasFlag(LegacyHitObjectType.Spinner))
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{
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double endTime = Math.Max(startTime, Parsing.ParseDouble(split[5]) + Offset);
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result = CreateSpinner(new Vector2(512, 384) / 2, combo, comboOffset, endTime);
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if (split.Length > 6)
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readCustomSampleBanks(split[6], bankInfo);
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}
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else if (type.HasFlag(LegacyHitObjectType.Hold))
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{
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// Note: Hold is generated by BMS converts
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double endTime = Math.Max(startTime, Parsing.ParseDouble(split[2]));
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if (split.Length > 5 && !string.IsNullOrEmpty(split[5]))
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{
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string[] ss = split[5].Split(':');
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endTime = Math.Max(startTime, Parsing.ParseDouble(ss[0]));
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readCustomSampleBanks(string.Join(":", ss.Skip(1)), bankInfo);
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}
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result = CreateHold(pos, combo, comboOffset, endTime + Offset);
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}
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if (result == null)
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throw new InvalidDataException($"Unknown hit object type: {split[3]}");
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result.StartTime = startTime;
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if (result.Samples.Count == 0)
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result.Samples = convertSoundType(soundType, bankInfo);
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FirstObject = false;
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return result;
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}
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private void readCustomSampleBanks(string str, SampleBankInfo bankInfo)
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{
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if (string.IsNullOrEmpty(str))
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return;
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string[] split = str.Split(':');
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var bank = (LegacySampleBank)Parsing.ParseInt(split[0]);
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var addbank = (LegacySampleBank)Parsing.ParseInt(split[1]);
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string stringBank = bank.ToString().ToLowerInvariant();
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if (stringBank == @"none")
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stringBank = null;
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string stringAddBank = addbank.ToString().ToLowerInvariant();
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if (stringAddBank == @"none")
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stringAddBank = null;
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bankInfo.Normal = stringBank;
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bankInfo.Add = string.IsNullOrEmpty(stringAddBank) ? stringBank : stringAddBank;
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if (split.Length > 2)
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bankInfo.CustomSampleBank = Parsing.ParseInt(split[2]);
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if (split.Length > 3)
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bankInfo.Volume = Math.Max(0, Parsing.ParseInt(split[3]));
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bankInfo.Filename = split.Length > 4 ? split[4] : null;
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}
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private PathControlPoint[] convertControlPoints(Vector2[] vertices, PathType type)
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{
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if (type == PathType.PerfectCurve)
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{
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if (vertices.Length != 3)
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type = PathType.Bezier;
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else if (isLinear(vertices))
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{
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// osu-stable special-cased colinear perfect curves to a linear path
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type = PathType.Linear;
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}
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}
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var points = new List<PathControlPoint>(vertices.Length)
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{
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new PathControlPoint
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{
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Position = { Value = vertices[0] },
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Type = { Value = type }
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}
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};
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for (int i = 1; i < vertices.Length; i++)
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{
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if (vertices[i] == vertices[i - 1])
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{
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points[^1].Type.Value = type;
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continue;
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}
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points.Add(new PathControlPoint { Position = { Value = vertices[i] } });
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}
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return points.ToArray();
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static bool isLinear(Vector2[] p) => Precision.AlmostEquals(0, (p[1].Y - p[0].Y) * (p[2].X - p[0].X) - (p[1].X - p[0].X) * (p[2].Y - p[0].Y));
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}
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/// <summary>
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/// Creates a legacy Hit-type hit object.
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/// </summary>
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/// <param name="position">The position of the hit object.</param>
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/// <param name="newCombo">Whether the hit object creates a new combo.</param>
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/// <param name="comboOffset">When starting a new combo, the offset of the new combo relative to the current one.</param>
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/// <returns>The hit object.</returns>
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protected abstract HitObject CreateHit(Vector2 position, bool newCombo, int comboOffset);
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/// <summary>
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/// Creats a legacy Slider-type hit object.
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/// </summary>
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/// <param name="position">The position of the hit object.</param>
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/// <param name="newCombo">Whether the hit object creates a new combo.</param>
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/// <param name="comboOffset">When starting a new combo, the offset of the new combo relative to the current one.</param>
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/// <param name="controlPoints">The slider control points.</param>
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/// <param name="length">The slider length.</param>
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/// <param name="repeatCount">The slider repeat count.</param>
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/// <param name="nodeSamples">The samples to be played when the slider nodes are hit. This includes the head and tail of the slider.</param>
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/// <returns>The hit object.</returns>
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protected abstract HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, PathControlPoint[] controlPoints, double? length, int repeatCount,
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List<IList<HitSampleInfo>> nodeSamples);
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/// <summary>
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/// Creates a legacy Spinner-type hit object.
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/// </summary>
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/// <param name="position">The position of the hit object.</param>
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/// <param name="newCombo">Whether the hit object creates a new combo.</param>
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/// <param name="comboOffset">When starting a new combo, the offset of the new combo relative to the current one.</param>
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/// <param name="endTime">The spinner end time.</param>
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/// <returns>The hit object.</returns>
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protected abstract HitObject CreateSpinner(Vector2 position, bool newCombo, int comboOffset, double endTime);
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/// <summary>
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/// Creates a legacy Hold-type hit object.
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/// </summary>
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/// <param name="position">The position of the hit object.</param>
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/// <param name="newCombo">Whether the hit object creates a new combo.</param>
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/// <param name="comboOffset">When starting a new combo, the offset of the new combo relative to the current one.</param>
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/// <param name="endTime">The hold end time.</param>
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protected abstract HitObject CreateHold(Vector2 position, bool newCombo, int comboOffset, double endTime);
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private List<HitSampleInfo> convertSoundType(LegacyHitSoundType type, SampleBankInfo bankInfo)
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{
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// Todo: This should return the normal SampleInfos if the specified sample file isn't found, but that's a pretty edge-case scenario
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if (!string.IsNullOrEmpty(bankInfo.Filename))
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{
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return new List<HitSampleInfo>
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{
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new FileHitSampleInfo
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{
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Filename = bankInfo.Filename,
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Volume = bankInfo.Volume
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}
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};
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}
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var soundTypes = new List<HitSampleInfo>
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{
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new LegacyHitSampleInfo
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{
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Bank = bankInfo.Normal,
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Name = HitSampleInfo.HIT_NORMAL,
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Volume = bankInfo.Volume,
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CustomSampleBank = bankInfo.CustomSampleBank
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}
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};
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if (type.HasFlag(LegacyHitSoundType.Finish))
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{
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soundTypes.Add(new LegacyHitSampleInfo
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{
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Bank = bankInfo.Add,
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Name = HitSampleInfo.HIT_FINISH,
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Volume = bankInfo.Volume,
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CustomSampleBank = bankInfo.CustomSampleBank
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});
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}
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if (type.HasFlag(LegacyHitSoundType.Whistle))
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{
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soundTypes.Add(new LegacyHitSampleInfo
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{
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Bank = bankInfo.Add,
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Name = HitSampleInfo.HIT_WHISTLE,
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Volume = bankInfo.Volume,
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CustomSampleBank = bankInfo.CustomSampleBank
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});
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}
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if (type.HasFlag(LegacyHitSoundType.Clap))
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{
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soundTypes.Add(new LegacyHitSampleInfo
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{
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Bank = bankInfo.Add,
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Name = HitSampleInfo.HIT_CLAP,
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Volume = bankInfo.Volume,
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CustomSampleBank = bankInfo.CustomSampleBank
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});
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}
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return soundTypes;
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}
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private class SampleBankInfo
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{
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public string Filename;
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public string Normal;
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public string Add;
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public int Volume;
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public int CustomSampleBank;
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public SampleBankInfo Clone() => (SampleBankInfo)MemberwiseClone();
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}
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private class LegacyHitSampleInfo : HitSampleInfo
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{
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public int CustomSampleBank
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{
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set
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{
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if (value > 1)
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Suffix = value.ToString();
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}
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}
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}
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private class FileHitSampleInfo : HitSampleInfo
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{
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public string Filename;
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public override IEnumerable<string> LookupNames => new[]
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{
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Filename,
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Path.ChangeExtension(Filename, null)
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};
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}
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}
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}
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