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osu-lazer/osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs
T
Bartłomiej Dach c361e6d3c2 Adjust gameplay sample models to support custom sample sets
This is a set of model changes which is supposed to facilitate support
for custom sample sets to the beatmap editor that is on par with stable.

It is the minimal set of changes. Because of this, it can probably be
considered "ugly" or however else you want to put it - but before you
say that, I want to try and pre-empt that criticism by explaining where
the problems lie.

Problem #1: duality in sample models
---

There is currently a weird duality of what a `HitObject`'s samples will
be.

- If an object has just been placed in the editor, and not saved /
  decoded yet, it will use `HitSampleInfo`.

- If an object has already been encoded to the beatmap at least once, it
  will use `ConvertHitObjectParser.LegacyHitSampleInfo`.

As long as that state of affairs remains, `HitSampleInfo` must be able
to represent anything that `LegacyHitSampleInfo` can, if feature parity
is to be achieved.

Problem 2: The 0 & 1 sample banks
---

Custom sample banks of 2 and above are a pretty clean affair. They map to
a suffix on the sample filename, and said samples are allowed to be
looked up from the beatmap skin. `Suffix` already exists in
`HitSampleInfo`.

However, the 1 custom sample bank is evil. It uses *non-suffixed*
samples, *allows lookups from the beatmap skins*, contrary to no bank /
bank 0, which *also* uses non-suffixed samples, but *doesn't* allow them
to be looked up from the beatmap skin.

This is why `HitSampleInfo.UseBeatmapSamples` has been called to
existence - without it there is no way to represent the ability of using
or not using the beatmap skin assets.

As has been stated previously in discussions about this feature, it's
both a *mapping* and a *skinning* concern.

There are many things you could do about either of these problems, but I
am pretty sure tackling either one is going to take *many* more lines of
code than this commit does. Which is why this is the starting point of
negotiation.
2025-10-22 14:58:08 +02:00

637 lines
29 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 System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using osu.Game.Audio;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.Beatmaps.Legacy;
using osu.Game.Rulesets.Objects;
using osu.Game.Rulesets.Objects.Legacy;
using osu.Game.Rulesets.Objects.Types;
using osu.Game.Skinning;
using osuTK;
using osuTK.Graphics;
namespace osu.Game.Beatmaps.Formats
{
public class LegacyBeatmapEncoder
{
public const int FIRST_LAZER_VERSION = 128;
private readonly IBeatmap beatmap;
private readonly ISkin? skin;
private readonly int onlineRulesetID;
/// <summary>
/// Creates a new <see cref="LegacyBeatmapEncoder"/>.
/// </summary>
/// <param name="beatmap">The beatmap to encode.</param>
/// <param name="skin">The beatmap's skin, used for encoding combo colours.</param>
public LegacyBeatmapEncoder(IBeatmap beatmap, ISkin? skin)
{
this.beatmap = beatmap;
this.skin = skin;
onlineRulesetID = beatmap.BeatmapInfo.Ruleset.OnlineID;
if (onlineRulesetID < 0 || onlineRulesetID > 3)
throw new ArgumentException("Only beatmaps in the osu, taiko, catch, or mania rulesets can be encoded to the legacy beatmap format.", nameof(beatmap));
}
public void Encode(TextWriter writer)
{
writer.WriteLine($"osu file format v{FIRST_LAZER_VERSION}");
writer.WriteLine();
handleGeneral(writer);
writer.WriteLine();
handleEditor(writer);
writer.WriteLine();
handleMetadata(writer);
writer.WriteLine();
handleDifficulty(writer);
writer.WriteLine();
handleEvents(writer);
writer.WriteLine();
handleControlPoints(writer);
writer.WriteLine();
handleColours(writer);
writer.WriteLine();
handleHitObjects(writer);
}
private void handleGeneral(TextWriter writer)
{
writer.WriteLine("[General]");
if (!string.IsNullOrEmpty(beatmap.Metadata.AudioFile)) writer.WriteLine(FormattableString.Invariant($"AudioFilename: {Path.GetFileName(beatmap.Metadata.AudioFile)}"));
writer.WriteLine(FormattableString.Invariant($"AudioLeadIn: {beatmap.AudioLeadIn}"));
writer.WriteLine(FormattableString.Invariant($"PreviewTime: {beatmap.Metadata.PreviewTime}"));
writer.WriteLine(FormattableString.Invariant($"Countdown: {(int)beatmap.Countdown}"));
writer.WriteLine(FormattableString.Invariant(
$"SampleSet: {toLegacySampleBank(((beatmap.ControlPointInfo as LegacyControlPointInfo)?.SamplePoints.FirstOrDefault() ?? SampleControlPoint.DEFAULT).SampleBank)}"));
writer.WriteLine(FormattableString.Invariant($"StackLeniency: {beatmap.StackLeniency}"));
writer.WriteLine(FormattableString.Invariant($"Mode: {onlineRulesetID}"));
writer.WriteLine(FormattableString.Invariant($"LetterboxInBreaks: {(beatmap.LetterboxInBreaks ? '1' : '0')}"));
// if (beatmap.BeatmapInfo.UseSkinSprites)
// writer.WriteLine(@"UseSkinSprites: 1");
// if (b.AlwaysShowPlayfield)
// writer.WriteLine(@"AlwaysShowPlayfield: 1");
// if (b.OverlayPosition != OverlayPosition.NoChange)
// writer.WriteLine(@"OverlayPosition: " + b.OverlayPosition);
// if (!string.IsNullOrEmpty(b.SkinPreference))
// writer.WriteLine(@"SkinPreference:" + b.SkinPreference);
if (beatmap.EpilepsyWarning)
writer.WriteLine(@"EpilepsyWarning: 1");
if (beatmap.CountdownOffset > 0)
writer.WriteLine(FormattableString.Invariant($@"CountdownOffset: {beatmap.CountdownOffset}"));
if (onlineRulesetID == 3)
writer.WriteLine(FormattableString.Invariant($"SpecialStyle: {(beatmap.SpecialStyle ? '1' : '0')}"));
writer.WriteLine(FormattableString.Invariant($"WidescreenStoryboard: {(beatmap.WidescreenStoryboard ? '1' : '0')}"));
if (beatmap.SamplesMatchPlaybackRate)
writer.WriteLine(@"SamplesMatchPlaybackRate: 1");
}
private void handleEditor(TextWriter writer)
{
writer.WriteLine("[Editor]");
if (beatmap.Bookmarks.Length > 0)
writer.WriteLine(FormattableString.Invariant($"Bookmarks: {string.Join(',', beatmap.Bookmarks)}"));
writer.WriteLine(FormattableString.Invariant($"DistanceSpacing: {beatmap.DistanceSpacing}"));
writer.WriteLine(FormattableString.Invariant($"BeatDivisor: {beatmap.BeatmapInfo.BeatDivisor}"));
writer.WriteLine(FormattableString.Invariant($"GridSize: {beatmap.GridSize}"));
writer.WriteLine(FormattableString.Invariant($"TimelineZoom: {beatmap.TimelineZoom}"));
}
private void handleMetadata(TextWriter writer)
{
writer.WriteLine("[Metadata]");
writer.WriteLine(FormattableString.Invariant($"Title: {beatmap.Metadata.Title}"));
if (!string.IsNullOrEmpty(beatmap.Metadata.TitleUnicode)) writer.WriteLine(FormattableString.Invariant($"TitleUnicode: {beatmap.Metadata.TitleUnicode}"));
writer.WriteLine(FormattableString.Invariant($"Artist: {beatmap.Metadata.Artist}"));
if (!string.IsNullOrEmpty(beatmap.Metadata.ArtistUnicode)) writer.WriteLine(FormattableString.Invariant($"ArtistUnicode: {beatmap.Metadata.ArtistUnicode}"));
writer.WriteLine(FormattableString.Invariant($"Creator: {beatmap.Metadata.Author.Username}"));
writer.WriteLine(FormattableString.Invariant($"Version: {beatmap.BeatmapInfo.DifficultyName}"));
if (!string.IsNullOrEmpty(beatmap.Metadata.Source)) writer.WriteLine(FormattableString.Invariant($"Source: {beatmap.Metadata.Source}"));
if (!string.IsNullOrEmpty(beatmap.Metadata.Tags)) writer.WriteLine(FormattableString.Invariant($"Tags: {beatmap.Metadata.Tags}"));
if (beatmap.BeatmapInfo.OnlineID > 0) writer.WriteLine(FormattableString.Invariant($"BeatmapID: {beatmap.BeatmapInfo.OnlineID}"));
if (beatmap.BeatmapInfo.BeatmapSet?.OnlineID > 0) writer.WriteLine(FormattableString.Invariant($"BeatmapSetID: {beatmap.BeatmapInfo.BeatmapSet.OnlineID}"));
}
private void handleDifficulty(TextWriter writer)
{
writer.WriteLine("[Difficulty]");
writer.WriteLine(FormattableString.Invariant($"HPDrainRate: {beatmap.Difficulty.DrainRate}"));
writer.WriteLine(FormattableString.Invariant($"CircleSize: {beatmap.Difficulty.CircleSize}"));
writer.WriteLine(FormattableString.Invariant($"OverallDifficulty: {beatmap.Difficulty.OverallDifficulty}"));
writer.WriteLine(FormattableString.Invariant($"ApproachRate: {beatmap.Difficulty.ApproachRate}"));
writer.WriteLine(FormattableString.Invariant($"SliderMultiplier: {beatmap.Difficulty.SliderMultiplier}"));
writer.WriteLine(FormattableString.Invariant($"SliderTickRate: {beatmap.Difficulty.SliderTickRate}"));
}
private void handleEvents(TextWriter writer)
{
writer.WriteLine("[Events]");
if (!string.IsNullOrEmpty(beatmap.BeatmapInfo.Metadata.BackgroundFile))
writer.WriteLine(FormattableString.Invariant($"{(int)LegacyEventType.Background},0,\"{beatmap.BeatmapInfo.Metadata.BackgroundFile}\",0,0"));
foreach (var b in beatmap.Breaks)
writer.WriteLine(FormattableString.Invariant($"{(int)LegacyEventType.Break},{b.StartTime},{b.EndTime}"));
foreach (string l in beatmap.UnhandledEventLines)
writer.WriteLine(l);
}
private void handleControlPoints(TextWriter writer)
{
var legacyControlPoints = new LegacyControlPointInfo();
foreach (var point in beatmap.ControlPointInfo.AllControlPoints)
legacyControlPoints.Add(point.Time, point.DeepClone());
writer.WriteLine("[TimingPoints]");
SampleControlPoint? lastRelevantSamplePoint = null;
DifficultyControlPoint? lastRelevantDifficultyPoint = null;
// In osu!taiko and osu!mania, a scroll speed is stored as "slider velocity" in legacy formats.
// In that case, a scrolling speed change is a global effect and per-hit object difficulty control points are ignored.
bool scrollSpeedEncodedAsSliderVelocity = onlineRulesetID == 1 || onlineRulesetID == 3;
// iterate over hitobjects and pull out all required sample and difficulty changes
extractDifficultyControlPoints(beatmap.HitObjects);
extractSampleControlPoints(beatmap.HitObjects);
if (scrollSpeedEncodedAsSliderVelocity)
{
foreach (var point in legacyControlPoints.EffectPoints)
{
legacyControlPoints.Add(point.Time, new DifficultyControlPoint
{
SliderVelocityBindable =
{
MinValue = point.ScrollSpeedBindable.MinValue,
MaxValue = point.ScrollSpeedBindable.MaxValue,
Value = point.ScrollSpeedBindable.Value,
}
});
}
}
LegacyControlPointProperties lastControlPointProperties = new LegacyControlPointProperties();
foreach (var group in legacyControlPoints.Groups)
{
var groupTimingPoint = group.ControlPoints.OfType<TimingControlPoint>().FirstOrDefault();
var controlPointProperties = getLegacyControlPointProperties(group, groupTimingPoint != null);
// If the group contains a timing control point, it needs to be output separately.
if (groupTimingPoint != null)
{
writer.Write(FormattableString.Invariant($"{groupTimingPoint.Time},"));
writer.Write(FormattableString.Invariant($"{groupTimingPoint.BeatLength},"));
outputControlPointAt(controlPointProperties, true);
lastControlPointProperties = controlPointProperties;
lastControlPointProperties.SliderVelocity = 1;
}
if (controlPointProperties.IsRedundant(lastControlPointProperties))
continue;
// Output any remaining effects as secondary non-timing control point.
writer.Write(FormattableString.Invariant($"{group.Time},"));
writer.Write(FormattableString.Invariant($"{-100 / controlPointProperties.SliderVelocity},"));
outputControlPointAt(controlPointProperties, false);
lastControlPointProperties = controlPointProperties;
}
LegacyControlPointProperties getLegacyControlPointProperties(ControlPointGroup group, bool updateSampleBank)
{
var timingPoint = legacyControlPoints.TimingPointAt(group.Time);
var difficultyPoint = legacyControlPoints.DifficultyPointAt(group.Time);
var samplePoint = legacyControlPoints.SamplePointAt(group.Time);
var effectPoint = legacyControlPoints.EffectPointAt(group.Time);
// Apply the control point to a hit sample to uncover legacy properties (e.g. suffix)
HitSampleInfo tempHitSample = samplePoint.ApplyTo(new ConvertHitObjectParser.LegacyHitSampleInfo(string.Empty));
int customSampleBank = toLegacyCustomSampleBank(tempHitSample);
// Convert effect flags to the legacy format
LegacyEffectFlags effectFlags = LegacyEffectFlags.None;
if (effectPoint.KiaiMode)
effectFlags |= LegacyEffectFlags.Kiai;
if (timingPoint.OmitFirstBarLine)
effectFlags |= LegacyEffectFlags.OmitFirstBarLine;
return new LegacyControlPointProperties
{
SliderVelocity = difficultyPoint.SliderVelocity,
TimingSignature = timingPoint.TimeSignature.Numerator,
SampleBank = updateSampleBank ? (int)toLegacySampleBank(tempHitSample.Bank) : lastControlPointProperties.SampleBank,
// Inherit the previous custom sample bank if the current custom sample bank is not set
CustomSampleBank = customSampleBank >= 0 ? customSampleBank : lastControlPointProperties.CustomSampleBank,
SampleVolume = tempHitSample.Volume,
EffectFlags = effectFlags
};
}
void outputControlPointAt(LegacyControlPointProperties controlPoint, bool isTimingPoint)
{
writer.Write(FormattableString.Invariant($"{controlPoint.TimingSignature.ToString(CultureInfo.InvariantCulture)},"));
writer.Write(FormattableString.Invariant($"{controlPoint.SampleBank.ToString(CultureInfo.InvariantCulture)},"));
writer.Write(FormattableString.Invariant($"{controlPoint.CustomSampleBank.ToString(CultureInfo.InvariantCulture)},"));
writer.Write(FormattableString.Invariant($"{controlPoint.SampleVolume.ToString(CultureInfo.InvariantCulture)},"));
writer.Write(FormattableString.Invariant($"{(isTimingPoint ? "1" : "0")},"));
writer.Write(FormattableString.Invariant($"{((int)controlPoint.EffectFlags).ToString(CultureInfo.InvariantCulture)}"));
writer.WriteLine();
}
IEnumerable<DifficultyControlPoint> collectDifficultyControlPoints(IEnumerable<HitObject> hitObjects)
{
if (scrollSpeedEncodedAsSliderVelocity)
yield break;
foreach (var hitObject in hitObjects)
{
if (hitObject is IHasSliderVelocity hasSliderVelocity)
yield return new DifficultyControlPoint { Time = hitObject.StartTime, SliderVelocity = hasSliderVelocity.SliderVelocityMultiplier };
}
}
void extractDifficultyControlPoints(IEnumerable<HitObject> hitObjects)
{
foreach (var hDifficultyPoint in collectDifficultyControlPoints(hitObjects).OrderBy(dp => dp.Time))
{
if (!hDifficultyPoint.IsRedundant(lastRelevantDifficultyPoint))
{
legacyControlPoints.Add(hDifficultyPoint.Time, hDifficultyPoint);
lastRelevantDifficultyPoint = hDifficultyPoint;
}
}
}
IEnumerable<SampleControlPoint> collectSampleControlPoints(IEnumerable<HitObject> hitObjects)
{
foreach (var hitObject in hitObjects)
{
if (hitObject is IHasRepeats hasNodeSamples)
{
double spanDuration = hasNodeSamples.Duration / hasNodeSamples.SpanCount();
for (int i = 0; i < hasNodeSamples.NodeSamples.Count; ++i)
{
double nodeTime = hitObject.StartTime + i * spanDuration;
if (hasNodeSamples.NodeSamples[i].Count > 0)
yield return createSampleControlPointFor(nodeTime, hasNodeSamples.NodeSamples[i]);
if (spanDuration > LegacyBeatmapDecoder.CONTROL_POINT_LENIENCY + 1 && hitObject.Samples.Count > 0 && i < hasNodeSamples.NodeSamples.Count - 1)
yield return createSampleControlPointFor(nodeTime + LegacyBeatmapDecoder.CONTROL_POINT_LENIENCY + 1, hitObject.Samples);
}
}
else if (hitObject.Samples.Count > 0)
{
yield return createSampleControlPointFor(hitObject.GetEndTime(), hitObject.Samples);
}
foreach (var nested in collectSampleControlPoints(hitObject.NestedHitObjects))
yield return nested;
}
SampleControlPoint createSampleControlPointFor(double time, IList<HitSampleInfo> samples)
{
int volume = samples.Max(o => o.Volume);
string bank = samples.Where(s => s.Name == HitSampleInfo.HIT_NORMAL).Select(s => s.Bank).FirstOrDefault()
?? samples.Select(s => s.Bank).First();
int customIndex = samples.Max(s =>
{
switch (s)
{
case ConvertHitObjectParser.LegacyHitSampleInfo legacy:
return legacy.CustomSampleBank;
default:
if (int.TryParse(s.Suffix, out int index))
return index;
return s.UseBeatmapSamples ? 1 : -1;
}
});
return new LegacyBeatmapDecoder.LegacySampleControlPoint { Time = time, SampleVolume = volume, SampleBank = bank, CustomSampleBank = customIndex };
}
}
void extractSampleControlPoints(IEnumerable<HitObject> hitObject)
{
foreach (var hSamplePoint in collectSampleControlPoints(hitObject).OrderBy(sp => sp.Time))
{
if (!hSamplePoint.IsRedundant(lastRelevantSamplePoint))
{
legacyControlPoints.Add(hSamplePoint.Time, hSamplePoint);
lastRelevantSamplePoint = hSamplePoint;
}
}
}
}
private void handleColours(TextWriter writer)
{
var colours = skin?.GetConfig<GlobalSkinColours, IReadOnlyList<Color4>>(GlobalSkinColours.ComboColours)?.Value;
if (colours == null || colours.Count == 0)
return;
writer.WriteLine("[Colours]");
for (int i = 0; i < Math.Min(colours.Count, LegacyBeatmapDecoder.MAX_COMBO_COLOUR_COUNT); i++)
{
var comboColour = colours[i];
writer.Write(FormattableString.Invariant($"Combo{1 + i}: "));
writer.Write(FormattableString.Invariant($"{(byte)(comboColour.R * byte.MaxValue)},"));
writer.Write(FormattableString.Invariant($"{(byte)(comboColour.G * byte.MaxValue)},"));
writer.Write(FormattableString.Invariant($"{(byte)(comboColour.B * byte.MaxValue)},"));
writer.Write(FormattableString.Invariant($"{(byte)(comboColour.A * byte.MaxValue)}"));
writer.WriteLine();
}
}
private void handleHitObjects(TextWriter writer)
{
writer.WriteLine("[HitObjects]");
if (beatmap.HitObjects.Count == 0)
return;
foreach (var h in beatmap.HitObjects)
handleHitObject(writer, h);
}
private void handleHitObject(TextWriter writer, HitObject hitObject)
{
Vector2 position = new Vector2(256, 192);
switch (onlineRulesetID)
{
case 0:
case 2:
position = ((IHasPosition)hitObject).Position;
break;
case 3:
int totalColumns = (int)Math.Max(1, beatmap.Difficulty.CircleSize);
position.X = (int)Math.Ceiling(((IHasXPosition)hitObject).X * (512f / totalColumns));
break;
}
writer.Write(FormattableString.Invariant($"{position.X},"));
writer.Write(FormattableString.Invariant($"{position.Y},"));
writer.Write(FormattableString.Invariant($"{hitObject.StartTime},"));
writer.Write(FormattableString.Invariant($"{(int)getObjectType(hitObject)},"));
writer.Write(FormattableString.Invariant($"{(int)toLegacyHitSoundType(hitObject.Samples)},"));
if (hitObject is IHasPath path)
{
addPathData(writer, path, position);
writer.Write(getSampleBank(hitObject.Samples));
}
else
{
if (hitObject is IHasDuration)
addEndTimeData(writer, hitObject);
writer.Write(getSampleBank(hitObject.Samples));
}
writer.WriteLine();
}
private LegacyHitObjectType getObjectType(HitObject hitObject)
{
LegacyHitObjectType type = 0;
if (hitObject is IHasCombo combo)
{
type = (LegacyHitObjectType)(combo.ComboOffset << 4);
if (combo.NewCombo)
type |= LegacyHitObjectType.NewCombo;
}
switch (hitObject)
{
case IHasPath:
type |= LegacyHitObjectType.Slider;
break;
case IHasDuration:
if (onlineRulesetID == 3)
type |= LegacyHitObjectType.Hold;
else
type |= LegacyHitObjectType.Spinner;
break;
default:
type |= LegacyHitObjectType.Circle;
break;
}
return type;
}
private void addPathData(TextWriter writer, IHasPath pathData, Vector2 position)
{
for (int i = 0; i < pathData.Path.ControlPoints.Count; i++)
{
PathControlPoint point = pathData.Path.ControlPoints[i];
// Note that lazer's encoding format supports specifying multiple curve types for a slider path, which is not supported by stable.
// Backwards compatibility with stable is handled by `LegacyBeatmapExporter` and `BezierConverter.ConvertToModernBezier()`.
if (point.Type != null)
{
switch (point.Type?.Type)
{
case SplineType.BSpline:
writer.Write(point.Type.Value.Degree > 0 ? $"B{point.Type.Value.Degree}|" : "B|");
break;
case SplineType.Catmull:
writer.Write("C|");
break;
case SplineType.PerfectCurve:
writer.Write("P|");
break;
case SplineType.Linear:
writer.Write("L|");
break;
}
}
if (i != 0)
{
writer.Write(FormattableString.Invariant($"{position.X + point.Position.X}:{position.Y + point.Position.Y}"));
writer.Write(i != pathData.Path.ControlPoints.Count - 1 ? "|" : ",");
}
}
var curveData = pathData as IHasPathWithRepeats;
writer.Write(FormattableString.Invariant($"{(curveData?.RepeatCount ?? 0) + 1},"));
writer.Write(FormattableString.Invariant($"{pathData.Path.ExpectedDistance.Value ?? pathData.Path.Distance},"));
if (curveData != null)
{
for (int i = 0; i < curveData.SpanCount() + 1; i++)
{
writer.Write(FormattableString.Invariant($"{(i < curveData.NodeSamples.Count ? (int)toLegacyHitSoundType(curveData.NodeSamples[i]) : 0)}"));
writer.Write(i != curveData.SpanCount() ? "|" : ",");
}
for (int i = 0; i < curveData.SpanCount() + 1; i++)
{
writer.Write(i < curveData.NodeSamples.Count ? getSampleBank(curveData.NodeSamples[i], true) : "0:0");
writer.Write(i != curveData.SpanCount() ? "|" : ",");
}
}
}
private void addEndTimeData(TextWriter writer, HitObject hitObject)
{
var endTimeData = (IHasDuration)hitObject;
var type = getObjectType(hitObject);
char suffix = ',';
// Holds write the end time as if it's part of sample data.
if (type == LegacyHitObjectType.Hold)
suffix = ':';
writer.Write(FormattableString.Invariant($"{endTimeData.EndTime}{suffix}"));
}
private string getSampleBank(IList<HitSampleInfo> samples, bool banksOnly = false)
{
LegacySampleBank normalBank = toLegacySampleBank(samples.SingleOrDefault(s => s.Name == HitSampleInfo.HIT_NORMAL)?.Bank);
LegacySampleBank addBank = toLegacySampleBank(samples.FirstOrDefault(s => !string.IsNullOrEmpty(s.Name) && s.Name != HitSampleInfo.HIT_NORMAL && !s.EditorAutoBank)?.Bank);
StringBuilder sb = new StringBuilder();
sb.Append(FormattableString.Invariant($"{(int)normalBank}:"));
sb.Append(FormattableString.Invariant($"{(int)addBank}"));
if (!banksOnly)
{
int customSampleBank = toLegacyCustomSampleBank(samples.FirstOrDefault(s => !string.IsNullOrEmpty(s.Name)));
string sampleFilename = samples.FirstOrDefault(s => string.IsNullOrEmpty(s.Name))?.LookupNames.First() ?? string.Empty;
int volume = samples.FirstOrDefault()?.Volume ?? 100;
// We want to ignore custom sample banks and volume when not encoding to the mania game mode,
// because they cause unexpected results in the editor and are already satisfied by the control points.
if (onlineRulesetID != 3)
{
customSampleBank = 0;
volume = 0;
}
sb.Append(':');
sb.Append(FormattableString.Invariant($"{customSampleBank}:"));
sb.Append(FormattableString.Invariant($"{volume}:"));
sb.Append(FormattableString.Invariant($"{sampleFilename}"));
}
return sb.ToString();
}
private LegacyHitSoundType toLegacyHitSoundType(IList<HitSampleInfo> samples)
{
LegacyHitSoundType type = LegacyHitSoundType.None;
foreach (var sample in samples)
{
switch (sample.Name)
{
case HitSampleInfo.HIT_WHISTLE:
type |= LegacyHitSoundType.Whistle;
break;
case HitSampleInfo.HIT_FINISH:
type |= LegacyHitSoundType.Finish;
break;
case HitSampleInfo.HIT_CLAP:
type |= LegacyHitSoundType.Clap;
break;
}
}
return type;
}
private LegacySampleBank toLegacySampleBank(string? sampleBank)
{
switch (sampleBank?.ToLowerInvariant())
{
case HitSampleInfo.BANK_NORMAL:
return LegacySampleBank.Normal;
case HitSampleInfo.BANK_SOFT:
return LegacySampleBank.Soft;
case HitSampleInfo.BANK_DRUM:
return LegacySampleBank.Drum;
default:
return LegacySampleBank.None;
}
}
private int toLegacyCustomSampleBank(HitSampleInfo? hitSampleInfo)
{
if (hitSampleInfo is ConvertHitObjectParser.LegacyHitSampleInfo legacy)
return legacy.CustomSampleBank;
return 0;
}
private struct LegacyControlPointProperties
{
internal double SliderVelocity { get; set; }
internal int TimingSignature { get; init; }
internal int SampleBank { get; init; }
internal int CustomSampleBank { get; init; }
internal int SampleVolume { get; init; }
internal LegacyEffectFlags EffectFlags { get; init; }
internal bool IsRedundant(LegacyControlPointProperties other) =>
SliderVelocity == other.SliderVelocity &&
TimingSignature == other.TimingSignature &&
SampleBank == other.SampleBank &&
CustomSampleBank == other.CustomSampleBank &&
SampleVolume == other.SampleVolume &&
EffectFlags == other.EffectFlags;
}
}
}