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335 lines
13 KiB
C#
335 lines
13 KiB
C#
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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using OpenTK;
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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.Globalization;
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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 osu.Framework.MathUtils;
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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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public override HitObject Parse(string text)
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{
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return Parse(text, 0);
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}
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public HitObject Parse(string text, double offset)
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{
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try
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{
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string[] split = text.Split(',');
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ConvertHitObjectType type = (ConvertHitObjectType)int.Parse(split[3]) & ~ConvertHitObjectType.ColourHax;
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bool combo = type.HasFlag(ConvertHitObjectType.NewCombo);
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type &= ~ConvertHitObjectType.NewCombo;
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var soundType = (LegacySoundType)int.Parse(split[4]);
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var bankInfo = new SampleBankInfo();
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HitObject result = null;
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if ((type & ConvertHitObjectType.Circle) > 0)
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{
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result = CreateHit(new Vector2(int.Parse(split[0]), int.Parse(split[1])), combo);
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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 & ConvertHitObjectType.Slider) > 0)
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{
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var pos = new Vector2(int.Parse(split[0]), int.Parse(split[1]));
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CurveType curveType = CurveType.Catmull;
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double length = 0;
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var points = new List<Vector2> { Vector2.Zero };
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string[] pointsplit = split[5].Split('|');
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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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curveType = CurveType.Catmull;
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break;
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case @"B":
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curveType = CurveType.Bezier;
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break;
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case @"L":
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curveType = CurveType.Linear;
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break;
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case @"P":
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curveType = CurveType.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.Add(new Vector2((int)Convert.ToDouble(temp[0], CultureInfo.InvariantCulture), (int)Convert.ToDouble(temp[1], CultureInfo.InvariantCulture)) - pos);
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}
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// osu-stable special-cased colinear perfect curves to a CurveType.Linear
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bool isLinear(List<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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if (points.Count == 3 && curveType == CurveType.PerfectCurve && isLinear(points))
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curveType = CurveType.Linear;
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int repeatCount = Convert.ToInt32(split[6], CultureInfo.InvariantCulture);
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if (repeatCount > 9000)
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throw new ArgumentOutOfRangeException(nameof(repeatCount), @"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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length = Convert.ToDouble(split[7], CultureInfo.InvariantCulture);
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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<LegacySoundType>();
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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 sound;
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int.TryParse(adds[i], out sound);
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nodeSoundTypes[i] = (LegacySoundType)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<List<SampleInfo>>(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, points, length, curveType, repeatCount, nodeSamples);
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}
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else if ((type & ConvertHitObjectType.Spinner) > 0)
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{
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result = CreateSpinner(new Vector2(512, 384) / 2, Convert.ToDouble(split[5], CultureInfo.InvariantCulture) + offset);
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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 & ConvertHitObjectType.Hold) > 0)
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{
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// Note: Hold is generated by BMS converts
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double endTime = Convert.ToDouble(split[2], CultureInfo.InvariantCulture);
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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 = Convert.ToDouble(ss[0], CultureInfo.InvariantCulture);
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readCustomSampleBanks(string.Join(":", ss.Skip(1)), bankInfo);
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}
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result = CreateHold(new Vector2(int.Parse(split[0]), int.Parse(split[1])), combo, endTime + offset);
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}
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if (result == null)
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throw new InvalidOperationException($@"Unknown hit object type {type}.");
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result.StartTime = Convert.ToDouble(split[2], CultureInfo.InvariantCulture) + offset;
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result.Samples = convertSoundType(soundType, bankInfo);
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return result;
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}
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catch (FormatException)
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{
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throw new FormatException("One or more hit objects were malformed.");
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}
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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 = (LegacyBeatmapDecoder.LegacySampleBank)Convert.ToInt32(split[0]);
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var addbank = (LegacyBeatmapDecoder.LegacySampleBank)Convert.ToInt32(split[1]);
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string stringBank = bank.ToString().ToLower();
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if (stringBank == @"none")
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stringBank = null;
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string stringAddBank = addbank.ToString().ToLower();
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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 = stringAddBank;
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if (split.Length > 3)
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bankInfo.Volume = int.Parse(split[3]);
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bankInfo.Filename = split.Length > 4 ? split[4] : null;
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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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/// <returns>The hit object.</returns>
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protected abstract HitObject CreateHit(Vector2 position, bool newCombo);
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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="controlPoints">The slider control points.</param>
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/// <param name="length">The slider length.</param>
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/// <param name="curveType">The slider curve type.</param>
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/// <param name="repeatCount">The slider repeat count.</param>
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/// <param name="repeatSamples">The samples to be played when the repeat 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, List<Vector2> controlPoints, double length, CurveType curveType, int repeatCount, List<List<SampleInfo>> repeatSamples);
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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="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, 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="endTime">The hold end time.</param>
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protected abstract HitObject CreateHold(Vector2 position, bool newCombo, double endTime);
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private List<SampleInfo> convertSoundType(LegacySoundType 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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return new List<SampleInfo> { new FileSampleInfo { Filename = bankInfo.Filename } };
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var soundTypes = new List<SampleInfo>
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{
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new SampleInfo
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{
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Bank = bankInfo.Normal,
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Name = SampleInfo.HIT_NORMAL,
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Volume = bankInfo.Volume
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}
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};
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if ((type & LegacySoundType.Finish) > 0)
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{
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soundTypes.Add(new SampleInfo
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{
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Bank = bankInfo.Add,
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Name = SampleInfo.HIT_FINISH,
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Volume = bankInfo.Volume
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});
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}
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if ((type & LegacySoundType.Whistle) > 0)
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{
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soundTypes.Add(new SampleInfo
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{
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Bank = bankInfo.Add,
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Name = SampleInfo.HIT_WHISTLE,
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Volume = bankInfo.Volume
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});
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}
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if ((type & LegacySoundType.Clap) > 0)
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{
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soundTypes.Add(new SampleInfo
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{
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Bank = bankInfo.Add,
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Name = SampleInfo.HIT_CLAP,
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Volume = bankInfo.Volume
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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 SampleBankInfo Clone() => (SampleBankInfo)MemberwiseClone();
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}
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private class FileSampleInfo : SampleInfo
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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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[Flags]
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private enum LegacySoundType
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{
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None = 0,
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Normal = 1,
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Whistle = 2,
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Finish = 4,
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Clap = 8
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}
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}
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}
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