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505 lines
20 KiB
C#
505 lines
20 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.Utils;
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using osu.Game.Beatmaps.Legacy;
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using osu.Game.Skinning;
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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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double? length = null;
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string[] pointSplit = split[5].Split('|');
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var controlPoints = new List<Memory<PathControlPoint>>();
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int startIndex = 0;
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int endIndex = 0;
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bool first = true;
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while (++endIndex < pointSplit.Length)
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{
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// Keep incrementing endIndex while it's not the start of a new segment (indicated by having a type descriptor of length 1).
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if (pointSplit[endIndex].Length > 1)
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continue;
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// Multi-segmented sliders DON'T contain the end point as part of the current segment as it's assumed to be the start of the next segment.
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// The start of the next segment is the index after the type descriptor.
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string endPoint = endIndex < pointSplit.Length - 1 ? pointSplit[endIndex + 1] : null;
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controlPoints.Add(convertControlPoints(pointSplit.AsSpan().Slice(startIndex, endIndex - startIndex), endPoint, first, pos));
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startIndex = endIndex;
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first = false;
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}
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if (endIndex > startIndex)
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controlPoints.Add(convertControlPoints(pointSplit.AsSpan().Slice(startIndex, endIndex - startIndex), null, first, pos));
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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], Parsing.MAX_COORDINATE_VALUE));
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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, mergeControlPoints(controlPoints), length, repeatCount, nodeSamples);
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}
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else if (type.HasFlag(LegacyHitObjectType.Spinner))
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{
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double duration = Math.Max(0, Parsing.ParseDouble(split[5]) + Offset - startTime);
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result = CreateSpinner(new Vector2(512, 384) / 2, combo, comboOffset, duration);
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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 - startTime);
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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 PathType convertPathType(string input)
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{
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switch (input[0])
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{
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default:
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case 'C':
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return PathType.Catmull;
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case 'B':
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return PathType.Bezier;
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case 'L':
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return PathType.Linear;
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case 'P':
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return PathType.PerfectCurve;
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}
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}
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/// <summary>
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/// Converts a given point list into a set of <see cref="PathControlPoint"/>s.
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/// </summary>
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/// <param name="pointSpan">The point list.</param>
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/// <param name="endPoint">Any extra endpoint to consider as part of the points. This will NOT be returned.</param>
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/// <param name="first">Whether this is the first point list in the set. If <c>true</c> the returned set will contain a zero point.</param>
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/// <param name="offset">The positional offset to apply to the control points.</param>
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/// <returns>The set of points contained by <paramref name="pointSpan"/>, prepended by an extra zero point if <paramref name="first"/> is <c>true</c>.</returns>
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private Memory<PathControlPoint> convertControlPoints(ReadOnlySpan<string> pointSpan, string endPoint, bool first, Vector2 offset)
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{
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PathType type = convertPathType(pointSpan[0]);
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int readOffset = first ? 1 : 0; // First control point is zero for the first segment.
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int readablePoints = pointSpan.Length - 1; // Total points readable from the base point span.
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int endPointLength = endPoint != null ? 1 : 0; // Extra length if an endpoint is given that lies outside the base point span.
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var vertices = new PathControlPoint[readOffset + readablePoints + endPointLength];
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// Fill any non-read points.
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for (int i = 0; i < readOffset; i++)
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vertices[i] = new PathControlPoint();
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// Parse into control points.
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for (int i = 1; i < pointSpan.Length; i++)
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readPoint(pointSpan[i], offset, out vertices[readOffset + i - 1]);
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// If an endpoint is given, add it now.
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if (endPoint != null)
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readPoint(endPoint, offset, out vertices[^1]);
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// Edge-case rules.
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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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// Set a definite type for the first control point.
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vertices[0].Type.Value = type;
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// A path can have multiple segments of the same type if there are two sequential control points with the same position.
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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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vertices[i].Type.Value = type;
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}
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return vertices.AsMemory().Slice(0, vertices.Length - endPointLength);
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static void readPoint(string value, Vector2 startPos, out PathControlPoint point)
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{
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string[] vertexSplit = value.Split(':');
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Vector2 pos = new Vector2((int)Parsing.ParseDouble(vertexSplit[0], Parsing.MAX_COORDINATE_VALUE), (int)Parsing.ParseDouble(vertexSplit[1], Parsing.MAX_COORDINATE_VALUE)) - startPos;
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point = new PathControlPoint { Position = { Value = pos } };
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}
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static bool isLinear(PathControlPoint[] p) => Precision.AlmostEquals(0, (p[1].Position.Value.Y - p[0].Position.Value.Y) * (p[2].Position.Value.X - p[0].Position.Value.X)
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- (p[1].Position.Value.X - p[0].Position.Value.X) * (p[2].Position.Value.Y - p[0].Position.Value.Y));
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}
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private PathControlPoint[] mergeControlPoints(List<Memory<PathControlPoint>> controlPointList)
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{
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int totalCount = 0;
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foreach (var arr in controlPointList)
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totalCount += arr.Length;
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var mergedArray = new PathControlPoint[totalCount];
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var mergedArrayMemory = mergedArray.AsMemory();
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int copyIndex = 0;
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foreach (var arr in controlPointList)
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{
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arr.CopyTo(mergedArrayMemory.Slice(copyIndex));
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copyIndex += arr.Length;
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}
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return mergedArray;
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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="duration">The spinner duration.</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 duration);
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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="duration">The hold duration.</param>
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protected abstract HitObject CreateHold(Vector2 position, bool newCombo, int comboOffset, double duration);
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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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// if the sound type doesn't have the Normal flag set, attach it anyway as a layered sample.
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// None also counts as a normal non-layered sample: https://osu.ppy.sh/help/wiki/osu!_File_Formats/Osu_(file_format)#hitsounds
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IsLayered = type != LegacyHitSoundType.None && !type.HasFlag(LegacyHitSoundType.Normal)
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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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public class LegacyHitSampleInfo : HitSampleInfo
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{
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private int customSampleBank;
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public int CustomSampleBank
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{
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get => customSampleBank;
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set
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{
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customSampleBank = value;
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if (value >= 2)
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Suffix = value.ToString();
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}
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}
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/// <summary>
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/// Whether this hit sample is layered.
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/// </summary>
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/// <remarks>
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/// Layered hit samples are automatically added in all modes (except osu!mania), but can be disabled
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/// using the <see cref="LegacySkinConfiguration.LegacySetting.LayeredHitSounds"/> skin config option.
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/// </remarks>
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public bool IsLayered { get; set; }
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}
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private class FileHitSampleInfo : LegacyHitSampleInfo
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{
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public string Filename;
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public FileHitSampleInfo()
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{
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// Make sure that the LegacyBeatmapSkin does not fall back to the user skin.
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// Note that this does not change the lookup names, as they are overridden locally.
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CustomSampleBank = 1;
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}
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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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