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osu-lazer/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
2021-04-05 17:49:36 +09:00

545 lines
24 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.
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.Legacy;
using osu.Game.Skinning;
using osu.Game.Utils;
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;
}
[CanBeNull]
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);
// 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 var 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)
{
if (string.IsNullOrEmpty(str))
return;
string[] split = str.Split(':');
var bank = (LegacySampleBank)Parsing.ParseInt(split[0]);
var addbank = (LegacySampleBank)Parsing.ParseInt(split[1]);
string stringBank = bank.ToString().ToLowerInvariant();
if (stringBank == @"none")
stringBank = null;
string stringAddBank = addbank.ToString().ToLowerInvariant();
if (stringAddBank == @"none")
stringAddBank = null;
bankInfo.Normal = stringBank;
bankInfo.Add = string.IsNullOrEmpty(stringAddBank) ? stringBank : stringAddBank;
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':
return PathType.Bezier;
case 'L':
return PathType.Linear;
case 'P':
return PathType.PerfectCurve;
}
}
/// <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[] pointSplit = pointString.Split('|');
var controlPoints = new List<Memory<PathControlPoint>>();
int startIndex = 0;
int endIndex = 0;
bool first = true;
while (++endIndex < pointSplit.Length)
{
// Keep incrementing endIndex while it's not the start of a new segment (indicated by having a type descriptor of length 1).
if (pointSplit[endIndex].Length > 1)
continue;
// 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.
// The start of the next segment is the index after the type descriptor.
string endPoint = endIndex < pointSplit.Length - 1 ? pointSplit[endIndex + 1] : null;
controlPoints.AddRange(convertPoints(pointSplit.AsMemory().Slice(startIndex, endIndex - startIndex), endPoint, first, offset));
startIndex = endIndex;
first = false;
}
if (endIndex > startIndex)
controlPoints.AddRange(convertPoints(pointSplit.AsMemory().Slice(startIndex, endIndex - startIndex), null, first, offset));
return mergePointsLists(controlPoints);
}
/// <summary>
/// Converts a given point list into a set of path segments.
/// </summary>
/// <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>
/// <param name="first">Whether this is the first segment in the set. If <c>true</c> the first of the returned segments will contain a zero point.</param>
/// <param name="offset">The positional offset to apply to the control points.</param>
/// <returns>The set of points contained by <paramref name="points"/> as one or more segments of the path, prepended by an extra zero point if <paramref name="first"/> is <c>true</c>.</returns>
private IEnumerable<Memory<PathControlPoint>> convertPoints(ReadOnlyMemory<string> points, string endPoint, bool first, Vector2 offset)
{
PathType type = convertPathType(points.Span[0]);
int readOffset = first ? 1 : 0; // First control point is zero for the first segment.
int readablePoints = points.Length - 1; // Total points readable from the base point span.
int endPointLength = endPoint != null ? 1 : 0; // Extra length if an endpoint is given that lies outside the base point span.
var vertices = new PathControlPoint[readOffset + readablePoints + endPointLength];
// Fill any non-read points.
for (int i = 0; i < readOffset; i++)
vertices[i] = new PathControlPoint();
// Parse into control points.
for (int i = 1; i < points.Length; i++)
readPoint(points.Span[i], offset, out vertices[readOffset + i - 1]);
// If an endpoint is given, add it to the end.
if (endPoint != null)
readPoint(endPoint, offset, out vertices[^1]);
// Edge-case rules (to match stable).
if (type == PathType.PerfectCurve)
{
if (vertices.Length != 3)
type = PathType.Bezier;
else if (isLinear(vertices))
{
// 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.Value = 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 - endPointLength)
{
// Keep incrementing while an implicit segment doesn't need to be started
if (vertices[endIndex].Position.Value != vertices[endIndex - 1].Position.Value)
continue;
// The last control point of each segment is not allowed to start a new implicit segment.
if (endIndex == vertices.Length - endPointLength - 1)
continue;
// Force a type on the last point, and return the current control point set as a segment.
vertices[endIndex - 1].Type.Value = type;
yield return vertices.AsMemory().Slice(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 (endIndex > startIndex)
yield return vertices.AsMemory().Slice(startIndex, endIndex - startIndex);
static void readPoint(string value, Vector2 startPos, out PathControlPoint point)
{
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;
point = new PathControlPoint { Position = { Value = pos } };
}
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)
- (p[1].Position.Value.X - p[0].Position.Value.X) * (p[2].Position.Value.Y - p[0].Position.Value.Y));
}
private PathControlPoint[] mergePointsLists(List<Memory<PathControlPoint>> controlPointList)
{
int totalCount = 0;
foreach (var arr in controlPointList)
totalCount += arr.Length;
var mergedArray = new PathControlPoint[totalCount];
var mergedArrayMemory = mergedArray.AsMemory();
int copyIndex = 0;
foreach (var arr in controlPointList)
{
arr.CopyTo(mergedArrayMemory.Slice(copyIndex));
copyIndex += arr.Length;
}
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,
List<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)
{
// Todo: This should return the normal SampleInfos if the specified sample file isn't found, but that's a pretty edge-case scenario
if (!string.IsNullOrEmpty(bankInfo.Filename))
{
return new List<HitSampleInfo> { new FileHitSampleInfo(bankInfo.Filename, bankInfo.Volume) };
}
var soundTypes = new List<HitSampleInfo>
{
new LegacyHitSampleInfo(HitSampleInfo.HIT_NORMAL, bankInfo.Normal, 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))
};
if (type.HasFlagFast(LegacyHitSoundType.Finish))
soundTypes.Add(new LegacyHitSampleInfo(HitSampleInfo.HIT_FINISH, bankInfo.Add, bankInfo.Volume, bankInfo.CustomSampleBank));
if (type.HasFlagFast(LegacyHitSoundType.Whistle))
soundTypes.Add(new LegacyHitSampleInfo(HitSampleInfo.HIT_WHISTLE, bankInfo.Add, bankInfo.Volume, bankInfo.CustomSampleBank));
if (type.HasFlagFast(LegacyHitSoundType.Clap))
soundTypes.Add(new LegacyHitSampleInfo(HitSampleInfo.HIT_CLAP, bankInfo.Add, bankInfo.Volume, bankInfo.CustomSampleBank));
return soundTypes;
}
private class SampleBankInfo
{
public string Filename;
public string Normal;
public string Add;
public int Volume;
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="LegacySkinConfiguration.LegacySetting.LayeredHitSounds"/> skin config option.
/// </remarks>
public readonly bool IsLayered;
public LegacyHitSampleInfo(string name, string? bank = null, int volume = 0, int customSampleBank = 0, bool isLayered = false)
: base(name, bank, customSampleBank >= 2 ? customSampleBank.ToString() : null, volume)
{
CustomSampleBank = customSampleBank;
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)
=> 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);
}
#nullable disable
}
}