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osu-lazer/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
2024-04-03 01:50:39 +08:00

614 lines
27 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
#nullable disable
using osuTK;
using osu.Game.Rulesets.Objects.Types;
using System;
using System.Collections.Generic;
using System.IO;
using osu.Game.Beatmaps.Formats;
using osu.Game.Audio;
using System.Linq;
using JetBrains.Annotations;
using osu.Framework.Extensions.EnumExtensions;
using osu.Framework.Utils;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.Beatmaps.Legacy;
using osu.Game.Skinning;
using osu.Game.Utils;
using System.Buffers;
namespace osu.Game.Rulesets.Objects.Legacy
{
/// <summary>
/// A HitObjectParser to parse legacy Beatmaps.
/// </summary>
public abstract class ConvertHitObjectParser : HitObjectParser
{
/// <summary>
/// The offset to apply to all time values.
/// </summary>
protected readonly double Offset;
/// <summary>
/// The beatmap version.
/// </summary>
protected readonly int FormatVersion;
protected bool FirstObject { get; private set; } = true;
protected ConvertHitObjectParser(double offset, int formatVersion)
{
Offset = offset;
FormatVersion = formatVersion;
}
public override HitObject Parse(string text)
{
string[] split = text.Split(',');
Vector2 pos = new Vector2((int)Parsing.ParseFloat(split[0], Parsing.MAX_COORDINATE_VALUE), (int)Parsing.ParseFloat(split[1], Parsing.MAX_COORDINATE_VALUE));
double startTime = Parsing.ParseDouble(split[2]) + Offset;
LegacyHitObjectType type = (LegacyHitObjectType)Parsing.ParseInt(split[3]);
int comboOffset = (int)(type & LegacyHitObjectType.ComboOffset) >> 4;
type &= ~LegacyHitObjectType.ComboOffset;
bool combo = type.HasFlagFast(LegacyHitObjectType.NewCombo);
type &= ~LegacyHitObjectType.NewCombo;
var soundType = (LegacyHitSoundType)Parsing.ParseInt(split[4]);
var bankInfo = new SampleBankInfo();
HitObject result = null;
if (type.HasFlagFast(LegacyHitObjectType.Circle))
{
result = CreateHit(pos, combo, comboOffset);
if (split.Length > 5)
readCustomSampleBanks(split[5], bankInfo);
}
else if (type.HasFlagFast(LegacyHitObjectType.Slider))
{
double? length = null;
int repeatCount = Parsing.ParseInt(split[6]);
if (repeatCount > 9000)
throw new FormatException(@"Repeat count is way too high");
// osu-stable treated the first span of the slider as a repeat, but no repeats are happening
repeatCount = Math.Max(0, repeatCount - 1);
if (split.Length > 7)
{
length = Math.Max(0, Parsing.ParseDouble(split[7], Parsing.MAX_COORDINATE_VALUE));
if (length == 0)
length = null;
}
if (split.Length > 10)
readCustomSampleBanks(split[10], bankInfo, true);
// One node for each repeat + the start and end nodes
int nodes = repeatCount + 2;
// Populate node sample bank infos with the default hit object sample bank
var nodeBankInfos = new List<SampleBankInfo>();
for (int i = 0; i < nodes; i++)
nodeBankInfos.Add(bankInfo.Clone());
// Read any per-node sample banks
if (split.Length > 9 && split[9].Length > 0)
{
string[] sets = split[9].Split('|');
for (int i = 0; i < nodes; i++)
{
if (i >= sets.Length)
break;
SampleBankInfo info = nodeBankInfos[i];
readCustomSampleBanks(sets[i], info);
}
}
// Populate node sound types with the default hit object sound type
var nodeSoundTypes = new List<LegacyHitSoundType>();
for (int i = 0; i < nodes; i++)
nodeSoundTypes.Add(soundType);
// Read any per-node sound types
if (split.Length > 8 && split[8].Length > 0)
{
string[] adds = split[8].Split('|');
for (int i = 0; i < nodes; i++)
{
if (i >= adds.Length)
break;
int.TryParse(adds[i], out int sound);
nodeSoundTypes[i] = (LegacyHitSoundType)sound;
}
}
// Generate the final per-node samples
var nodeSamples = new List<IList<HitSampleInfo>>(nodes);
for (int i = 0; i < nodes; i++)
nodeSamples.Add(convertSoundType(nodeSoundTypes[i], nodeBankInfos[i]));
result = CreateSlider(pos, combo, comboOffset, convertPathString(split[5], pos), length, repeatCount, nodeSamples);
}
else if (type.HasFlagFast(LegacyHitObjectType.Spinner))
{
double duration = Math.Max(0, Parsing.ParseDouble(split[5]) + Offset - startTime);
result = CreateSpinner(new Vector2(512, 384) / 2, combo, comboOffset, duration);
if (split.Length > 6)
readCustomSampleBanks(split[6], bankInfo);
}
else if (type.HasFlagFast(LegacyHitObjectType.Hold))
{
// Note: Hold is generated by BMS converts
double endTime = Math.Max(startTime, Parsing.ParseDouble(split[2]));
if (split.Length > 5 && !string.IsNullOrEmpty(split[5]))
{
string[] ss = split[5].Split(':');
endTime = Math.Max(startTime, Parsing.ParseDouble(ss[0]));
readCustomSampleBanks(string.Join(':', ss.Skip(1)), bankInfo);
}
result = CreateHold(pos, combo, comboOffset, endTime + Offset - startTime);
}
if (result == null)
throw new InvalidDataException($"Unknown hit object type: {split[3]}");
result.StartTime = startTime;
if (result.Samples.Count == 0)
result.Samples = convertSoundType(soundType, bankInfo);
FirstObject = false;
return result;
}
private void readCustomSampleBanks(string str, SampleBankInfo bankInfo, bool banksOnly = false)
{
if (string.IsNullOrEmpty(str))
return;
string[] split = str.Split(':');
var bank = (LegacySampleBank)Parsing.ParseInt(split[0]);
if (!Enum.IsDefined(bank))
bank = LegacySampleBank.Normal;
var addBank = (LegacySampleBank)Parsing.ParseInt(split[1]);
if (!Enum.IsDefined(addBank))
addBank = LegacySampleBank.Normal;
string stringBank = bank.ToString().ToLowerInvariant();
if (stringBank == @"none")
stringBank = null;
string stringAddBank = addBank.ToString().ToLowerInvariant();
if (stringAddBank == @"none")
stringAddBank = null;
bankInfo.BankForNormal = stringBank;
bankInfo.BankForAdditions = string.IsNullOrEmpty(stringAddBank) ? stringBank : stringAddBank;
if (banksOnly) return;
if (split.Length > 2)
bankInfo.CustomSampleBank = Parsing.ParseInt(split[2]);
if (split.Length > 3)
bankInfo.Volume = Math.Max(0, Parsing.ParseInt(split[3]));
bankInfo.Filename = split.Length > 4 ? split[4] : null;
}
private PathType convertPathType(string input)
{
switch (input[0])
{
default:
case 'C':
return PathType.CATMULL;
case 'B':
if (input.Length > 1 && int.TryParse(input.Substring(1), out int degree) && degree > 0)
return PathType.BSpline(degree);
return PathType.BEZIER;
case 'L':
return PathType.LINEAR;
case 'P':
return PathType.PERFECT_CURVE;
}
}
/// <summary>
/// Converts a given point string into a set of path control points.
/// </summary>
/// <remarks>
/// A point string takes the form: X|1:1|2:2|2:2|3:3|Y|1:1|2:2.
/// This has three segments:
/// <list type="number">
/// <item>
/// <description>X: { (1,1), (2,2) } (implicit segment)</description>
/// </item>
/// <item>
/// <description>X: { (2,2), (3,3) } (implicit segment)</description>
/// </item>
/// <item>
/// <description>Y: { (3,3), (1,1), (2, 2) } (explicit segment)</description>
/// </item>
/// </list>
/// </remarks>
/// <param name="pointString">The point string.</param>
/// <param name="offset">The positional offset to apply to the control points.</param>
/// <returns>All control points in the resultant path.</returns>
private PathControlPoint[] convertPathString(string pointString, Vector2 offset)
{
// This code takes on the responsibility of handling explicit segments of the path ("X" & "Y" from above). Implicit segments are handled by calls to convertPoints().
string[] pointStringSplit = pointString.Split('|');
var pointsBuffer = ArrayPool<Vector2>.Shared.Rent(pointStringSplit.Length);
var segmentsBuffer = ArrayPool<(PathType Type, int StartIndex)>.Shared.Rent(pointStringSplit.Length);
int currentPointsIndex = 0;
int currentSegmentsIndex = 0;
try
{
foreach (string s in pointStringSplit)
{
if (char.IsLetter(s[0]))
{
// The start of a new segment(indicated by having an alpha character at position 0).
var pathType = convertPathType(s);
segmentsBuffer[currentSegmentsIndex++] = (pathType, currentPointsIndex);
// First segment is prepended by an extra zero point
if (currentPointsIndex == 0)
pointsBuffer[currentPointsIndex++] = Vector2.Zero;
}
else
{
pointsBuffer[currentPointsIndex++] = readPoint(s, offset);
}
}
int pointsCount = currentPointsIndex;
int segmentsCount = currentSegmentsIndex;
var controlPoints = new List<ArraySegment<PathControlPoint>>(pointsCount);
var allPoints = new ArraySegment<Vector2>(pointsBuffer, 0, pointsCount);
for (int i = 0; i < segmentsCount; i++)
{
if (i < segmentsCount - 1)
{
int startIndex = segmentsBuffer[i].StartIndex;
int endIndex = segmentsBuffer[i + 1].StartIndex;
controlPoints.AddRange(convertPoints(segmentsBuffer[i].Type, allPoints.Slice(startIndex, endIndex - startIndex), pointsBuffer[endIndex]));
}
else
{
int startIndex = segmentsBuffer[i].StartIndex;
controlPoints.AddRange(convertPoints(segmentsBuffer[i].Type, allPoints.Slice(startIndex), null));
}
}
return mergeControlPointsLists(controlPoints);
}
finally
{
ArrayPool<Vector2>.Shared.Return(pointsBuffer);
ArrayPool<(PathType, int)>.Shared.Return(segmentsBuffer);
}
static Vector2 readPoint(string value, Vector2 startPos)
{
string[] vertexSplit = value.Split(':');
Vector2 pos = new Vector2((int)Parsing.ParseDouble(vertexSplit[0], Parsing.MAX_COORDINATE_VALUE), (int)Parsing.ParseDouble(vertexSplit[1], Parsing.MAX_COORDINATE_VALUE)) - startPos;
return pos;
}
}
/// <summary>
/// Converts a given point list into a set of path segments.
/// </summary>
/// <param name="type">The path type of the point list.</param>
/// <param name="points">The point list.</param>
/// <param name="endPoint">Any extra endpoint to consider as part of the points. This will NOT be returned.</param>
/// <returns>The set of points contained by <paramref name="points"/> as one or more segments of the path.</returns>
private IEnumerable<ArraySegment<PathControlPoint>> convertPoints(PathType type, ArraySegment<Vector2> points, Vector2? endPoint)
{
var vertices = new PathControlPoint[points.Count];
// Parse into control points.
for (int i = 0; i < points.Count; i++)
vertices[i] = new PathControlPoint { Position = points[i] };
// Edge-case rules (to match stable).
if (type == PathType.PERFECT_CURVE)
{
int endPointLength = endPoint == null ? 0 : 1;
if (vertices.Length + endPointLength != 3)
type = PathType.BEZIER;
else if (isLinear(points[0], points[1], endPoint ?? points[2]))
{
// osu-stable special-cased colinear perfect curves to a linear path
type = PathType.LINEAR;
}
}
// The first control point must have a definite type.
vertices[0].Type = type;
// A path can have multiple implicit segments of the same type if there are two sequential control points with the same position.
// To handle such cases, this code may return multiple path segments with the final control point in each segment having a non-null type.
// For the point string X|1:1|2:2|2:2|3:3, this code returns the segments:
// X: { (1,1), (2, 2) }
// X: { (3, 3) }
// Note: (2, 2) is not returned in the second segments, as it is implicit in the path.
int startIndex = 0;
int endIndex = 0;
while (++endIndex < vertices.Length)
{
// Keep incrementing while an implicit segment doesn't need to be started.
if (vertices[endIndex].Position != vertices[endIndex - 1].Position)
continue;
// Legacy CATMULL sliders don't support multiple segments, so adjacent CATMULL segments should be treated as a single one.
// Importantly, this is not applied to the first control point, which may duplicate the slider path's position
// resulting in a duplicate (0,0) control point in the resultant list.
if (type == PathType.CATMULL && endIndex > 1 && FormatVersion < LegacyBeatmapEncoder.FIRST_LAZER_VERSION)
continue;
// The last control point of each segment is not allowed to start a new implicit segment.
if (endIndex == vertices.Length - 1)
continue;
// Force a type on the last point, and return the current control point set as a segment.
vertices[endIndex - 1].Type = type;
yield return new ArraySegment<PathControlPoint>(vertices, startIndex, endIndex - startIndex);
// Skip the current control point - as it's the same as the one that's just been returned.
startIndex = endIndex + 1;
}
if (startIndex < endIndex)
yield return new ArraySegment<PathControlPoint>(vertices, startIndex, endIndex - startIndex);
static bool isLinear(Vector2 p0, Vector2 p1, Vector2 p2)
=> Precision.AlmostEquals(0, (p1.Y - p0.Y) * (p2.X - p0.X)
- (p1.X - p0.X) * (p2.Y - p0.Y));
}
private PathControlPoint[] mergeControlPointsLists(List<ArraySegment<PathControlPoint>> controlPointList)
{
int totalCount = 0;
foreach (var arr in controlPointList)
totalCount += arr.Count;
var mergedArray = new PathControlPoint[totalCount];
int copyIndex = 0;
foreach (var arr in controlPointList)
{
arr.AsSpan().CopyTo(mergedArray.AsSpan(copyIndex));
copyIndex += arr.Count;
}
return mergedArray;
}
/// <summary>
/// Creates a legacy Hit-type hit object.
/// </summary>
/// <param name="position">The position of the hit object.</param>
/// <param name="newCombo">Whether the hit object creates a new combo.</param>
/// <param name="comboOffset">When starting a new combo, the offset of the new combo relative to the current one.</param>
/// <returns>The hit object.</returns>
protected abstract HitObject CreateHit(Vector2 position, bool newCombo, int comboOffset);
/// <summary>
/// Creats a legacy Slider-type hit object.
/// </summary>
/// <param name="position">The position of the hit object.</param>
/// <param name="newCombo">Whether the hit object creates a new combo.</param>
/// <param name="comboOffset">When starting a new combo, the offset of the new combo relative to the current one.</param>
/// <param name="controlPoints">The slider control points.</param>
/// <param name="length">The slider length.</param>
/// <param name="repeatCount">The slider repeat count.</param>
/// <param name="nodeSamples">The samples to be played when the slider nodes are hit. This includes the head and tail of the slider.</param>
/// <returns>The hit object.</returns>
protected abstract HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, PathControlPoint[] controlPoints, double? length, int repeatCount,
IList<IList<HitSampleInfo>> nodeSamples);
/// <summary>
/// Creates a legacy Spinner-type hit object.
/// </summary>
/// <param name="position">The position of the hit object.</param>
/// <param name="newCombo">Whether the hit object creates a new combo.</param>
/// <param name="comboOffset">When starting a new combo, the offset of the new combo relative to the current one.</param>
/// <param name="duration">The spinner duration.</param>
/// <returns>The hit object.</returns>
protected abstract HitObject CreateSpinner(Vector2 position, bool newCombo, int comboOffset, double duration);
/// <summary>
/// Creates a legacy Hold-type hit object.
/// </summary>
/// <param name="position">The position of the hit object.</param>
/// <param name="newCombo">Whether the hit object creates a new combo.</param>
/// <param name="comboOffset">When starting a new combo, the offset of the new combo relative to the current one.</param>
/// <param name="duration">The hold duration.</param>
protected abstract HitObject CreateHold(Vector2 position, bool newCombo, int comboOffset, double duration);
private List<HitSampleInfo> convertSoundType(LegacyHitSoundType type, SampleBankInfo bankInfo)
{
var soundTypes = new List<HitSampleInfo>();
if (string.IsNullOrEmpty(bankInfo.Filename))
{
soundTypes.Add(new LegacyHitSampleInfo(HitSampleInfo.HIT_NORMAL, bankInfo.BankForNormal, bankInfo.Volume, bankInfo.CustomSampleBank,
// if the sound type doesn't have the Normal flag set, attach it anyway as a layered sample.
// None also counts as a normal non-layered sample: https://osu.ppy.sh/help/wiki/osu!_File_Formats/Osu_(file_format)#hitsounds
type != LegacyHitSoundType.None && !type.HasFlagFast(LegacyHitSoundType.Normal)));
}
else
{
// Todo: This should set the normal SampleInfo if the specified sample file isn't found, but that's a pretty edge-case scenario
soundTypes.Add(new FileHitSampleInfo(bankInfo.Filename, bankInfo.Volume));
}
if (type.HasFlagFast(LegacyHitSoundType.Finish))
soundTypes.Add(new LegacyHitSampleInfo(HitSampleInfo.HIT_FINISH, bankInfo.BankForAdditions, bankInfo.Volume, bankInfo.CustomSampleBank));
if (type.HasFlagFast(LegacyHitSoundType.Whistle))
soundTypes.Add(new LegacyHitSampleInfo(HitSampleInfo.HIT_WHISTLE, bankInfo.BankForAdditions, bankInfo.Volume, bankInfo.CustomSampleBank));
if (type.HasFlagFast(LegacyHitSoundType.Clap))
soundTypes.Add(new LegacyHitSampleInfo(HitSampleInfo.HIT_CLAP, bankInfo.BankForAdditions, bankInfo.Volume, bankInfo.CustomSampleBank));
return soundTypes;
}
private class SampleBankInfo
{
/// <summary>
/// An optional overriding filename which causes all bank/sample specifications to be ignored.
/// </summary>
public string Filename;
/// <summary>
/// The bank identifier to use for the base ("hitnormal") sample.
/// Transferred to <see cref="HitSampleInfo.Bank"/> when appropriate.
/// </summary>
[CanBeNull]
public string BankForNormal;
/// <summary>
/// The bank identifier to use for additions ("hitwhistle", "hitfinish", "hitclap").
/// Transferred to <see cref="HitSampleInfo.Bank"/> when appropriate.
/// </summary>
[CanBeNull]
public string BankForAdditions;
/// <summary>
/// Hit sample volume (0-100).
/// See <see cref="HitSampleInfo.Volume"/>.
/// </summary>
public int Volume;
/// <summary>
/// The index of the custom sample bank. Is only used if 2 or above for "reasons".
/// This will add a suffix to lookups, allowing extended bank lookups (ie. "normal-hitnormal-2").
/// See <see cref="HitSampleInfo.Suffix"/>.
/// </summary>
public int CustomSampleBank;
public SampleBankInfo Clone() => (SampleBankInfo)MemberwiseClone();
}
#nullable enable
public class LegacyHitSampleInfo : HitSampleInfo, IEquatable<LegacyHitSampleInfo>
{
public readonly int CustomSampleBank;
/// <summary>
/// Whether this hit sample is layered.
/// </summary>
/// <remarks>
/// Layered hit samples are automatically added in all modes (except osu!mania), but can be disabled
/// using the <see cref="SkinConfiguration.LegacySetting.LayeredHitSounds"/> skin config option.
/// </remarks>
public readonly bool IsLayered;
/// <summary>
/// Whether a bank was specified locally to the relevant hitobject.
/// If <c>false</c>, a bank will be retrieved from the closest control point.
/// </summary>
public bool BankSpecified;
public LegacyHitSampleInfo(string name, string? bank = null, int volume = 0, int customSampleBank = 0, bool isLayered = false)
: base(name, bank ?? SampleControlPoint.DEFAULT_BANK, customSampleBank >= 2 ? customSampleBank.ToString() : null, volume)
{
CustomSampleBank = customSampleBank;
BankSpecified = !string.IsNullOrEmpty(bank);
IsLayered = isLayered;
}
public sealed override HitSampleInfo With(Optional<string> newName = default, Optional<string> newBank = default, Optional<string?> newSuffix = default, Optional<int> newVolume = default)
=> With(newName, newBank, newVolume);
public virtual LegacyHitSampleInfo With(Optional<string> newName = default, Optional<string> newBank = default, Optional<int> newVolume = default,
Optional<int> newCustomSampleBank = default,
Optional<bool> newIsLayered = default)
=> new LegacyHitSampleInfo(newName.GetOr(Name), newBank.GetOr(Bank), newVolume.GetOr(Volume), newCustomSampleBank.GetOr(CustomSampleBank), newIsLayered.GetOr(IsLayered));
public bool Equals(LegacyHitSampleInfo? other)
// The additions to equality checks here are *required* to ensure that pooling works correctly.
// Of note, `IsLayered` may cause the usage of `SampleVirtual` instead of an actual sample (in cases playback is not required).
// Removing it would cause samples which may actually require playback to potentially source for a `SampleVirtual` sample pool.
=> base.Equals(other) && CustomSampleBank == other.CustomSampleBank && IsLayered == other.IsLayered;
public override bool Equals(object? obj)
=> obj is LegacyHitSampleInfo other && Equals(other);
public override int GetHashCode() => HashCode.Combine(base.GetHashCode(), CustomSampleBank, IsLayered);
}
private class FileHitSampleInfo : LegacyHitSampleInfo, IEquatable<FileHitSampleInfo>
{
public readonly string Filename;
public FileHitSampleInfo(string filename, int volume)
// Force CSS=1 to make sure that the LegacyBeatmapSkin does not fall back to the user skin.
// Note that this does not change the lookup names, as they are overridden locally.
: base(string.Empty, customSampleBank: 1, volume: volume)
{
Filename = filename;
}
public override IEnumerable<string> LookupNames => new[]
{
Filename,
Path.ChangeExtension(Filename, null)
};
public sealed override LegacyHitSampleInfo With(Optional<string> newName = default, Optional<string> newBank = default, Optional<int> newVolume = default,
Optional<int> newCustomSampleBank = default,
Optional<bool> newIsLayered = default)
=> new FileHitSampleInfo(Filename, newVolume.GetOr(Volume));
public bool Equals(FileHitSampleInfo? other)
=> base.Equals(other) && Filename == other.Filename;
public override bool Equals(object? obj)
=> obj is FileHitSampleInfo other && Equals(other);
public override int GetHashCode() => HashCode.Combine(base.GetHashCode(), Filename);
}
}
}