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6dcd9427ac
This is quite a breaking change, but I think it is beneficial due to the large amount of usage of this class. I originally intended just to remove the allocations of the two delegates handling the `Changed` flow internally, but as nothing was really using the bindables for anything more than a general "point has changed" case, this felt like a better direction.
496 lines
22 KiB
C#
496 lines
22 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 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 System.Linq;
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using System.Text;
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using JetBrains.Annotations;
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using osu.Game.Audio;
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using osu.Game.Beatmaps.ControlPoints;
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using osu.Game.Beatmaps.Legacy;
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using osu.Game.Rulesets.Objects;
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using osu.Game.Rulesets.Objects.Legacy;
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using osu.Game.Rulesets.Objects.Types;
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using osu.Game.Skinning;
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using osuTK;
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using osuTK.Graphics;
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namespace osu.Game.Beatmaps.Formats
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{
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public class LegacyBeatmapEncoder
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{
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public const int LATEST_VERSION = 128;
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private readonly IBeatmap beatmap;
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[CanBeNull]
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private readonly ISkin skin;
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/// <summary>
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/// Creates a new <see cref="LegacyBeatmapEncoder"/>.
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/// </summary>
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/// <param name="beatmap">The beatmap to encode.</param>
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/// <param name="skin">The beatmap's skin, used for encoding combo colours.</param>
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public LegacyBeatmapEncoder(IBeatmap beatmap, [CanBeNull] ISkin skin)
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{
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this.beatmap = beatmap;
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this.skin = skin;
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if (beatmap.BeatmapInfo.RulesetID < 0 || beatmap.BeatmapInfo.RulesetID > 3)
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throw new ArgumentException("Only beatmaps in the osu, taiko, catch, or mania rulesets can be encoded to the legacy beatmap format.", nameof(beatmap));
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}
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public void Encode(TextWriter writer)
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{
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writer.WriteLine($"osu file format v{LATEST_VERSION}");
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writer.WriteLine();
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handleGeneral(writer);
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writer.WriteLine();
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handleEditor(writer);
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writer.WriteLine();
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handleMetadata(writer);
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writer.WriteLine();
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handleDifficulty(writer);
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writer.WriteLine();
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handleEvents(writer);
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writer.WriteLine();
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handleControlPoints(writer);
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writer.WriteLine();
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handleColours(writer);
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writer.WriteLine();
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handleHitObjects(writer);
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}
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private void handleGeneral(TextWriter writer)
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{
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writer.WriteLine("[General]");
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if (beatmap.Metadata.AudioFile != null) writer.WriteLine(FormattableString.Invariant($"AudioFilename: {Path.GetFileName(beatmap.Metadata.AudioFile)}"));
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writer.WriteLine(FormattableString.Invariant($"AudioLeadIn: {beatmap.BeatmapInfo.AudioLeadIn}"));
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writer.WriteLine(FormattableString.Invariant($"PreviewTime: {beatmap.Metadata.PreviewTime}"));
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writer.WriteLine(FormattableString.Invariant($"Countdown: {(int)beatmap.BeatmapInfo.Countdown}"));
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writer.WriteLine(FormattableString.Invariant($"SampleSet: {toLegacySampleBank(beatmap.ControlPointInfo.SamplePointAt(double.MinValue).SampleBank)}"));
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writer.WriteLine(FormattableString.Invariant($"StackLeniency: {beatmap.BeatmapInfo.StackLeniency}"));
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writer.WriteLine(FormattableString.Invariant($"Mode: {beatmap.BeatmapInfo.RulesetID}"));
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writer.WriteLine(FormattableString.Invariant($"LetterboxInBreaks: {(beatmap.BeatmapInfo.LetterboxInBreaks ? '1' : '0')}"));
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// if (beatmap.BeatmapInfo.UseSkinSprites)
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// writer.WriteLine(@"UseSkinSprites: 1");
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// if (b.AlwaysShowPlayfield)
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// writer.WriteLine(@"AlwaysShowPlayfield: 1");
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// if (b.OverlayPosition != OverlayPosition.NoChange)
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// writer.WriteLine(@"OverlayPosition: " + b.OverlayPosition);
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// if (!string.IsNullOrEmpty(b.SkinPreference))
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// writer.WriteLine(@"SkinPreference:" + b.SkinPreference);
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if (beatmap.BeatmapInfo.EpilepsyWarning)
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writer.WriteLine(@"EpilepsyWarning: 1");
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if (beatmap.BeatmapInfo.CountdownOffset > 0)
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writer.WriteLine(FormattableString.Invariant($@"CountdownOffset: {beatmap.BeatmapInfo.CountdownOffset}"));
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if (beatmap.BeatmapInfo.RulesetID == 3)
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writer.WriteLine(FormattableString.Invariant($"SpecialStyle: {(beatmap.BeatmapInfo.SpecialStyle ? '1' : '0')}"));
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writer.WriteLine(FormattableString.Invariant($"WidescreenStoryboard: {(beatmap.BeatmapInfo.WidescreenStoryboard ? '1' : '0')}"));
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// if (b.SamplesMatchPlaybackRate)
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// writer.WriteLine(@"SamplesMatchPlaybackRate: 1");
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}
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private void handleEditor(TextWriter writer)
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{
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writer.WriteLine("[Editor]");
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if (beatmap.BeatmapInfo.Bookmarks.Length > 0)
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writer.WriteLine(FormattableString.Invariant($"Bookmarks: {string.Join(',', beatmap.BeatmapInfo.Bookmarks)}"));
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writer.WriteLine(FormattableString.Invariant($"DistanceSpacing: {beatmap.BeatmapInfo.DistanceSpacing}"));
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writer.WriteLine(FormattableString.Invariant($"BeatDivisor: {beatmap.BeatmapInfo.BeatDivisor}"));
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writer.WriteLine(FormattableString.Invariant($"GridSize: {beatmap.BeatmapInfo.GridSize}"));
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writer.WriteLine(FormattableString.Invariant($"TimelineZoom: {beatmap.BeatmapInfo.TimelineZoom}"));
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}
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private void handleMetadata(TextWriter writer)
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{
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writer.WriteLine("[Metadata]");
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writer.WriteLine(FormattableString.Invariant($"Title: {beatmap.Metadata.Title}"));
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if (beatmap.Metadata.TitleUnicode != null) writer.WriteLine(FormattableString.Invariant($"TitleUnicode: {beatmap.Metadata.TitleUnicode}"));
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writer.WriteLine(FormattableString.Invariant($"Artist: {beatmap.Metadata.Artist}"));
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if (beatmap.Metadata.ArtistUnicode != null) writer.WriteLine(FormattableString.Invariant($"ArtistUnicode: {beatmap.Metadata.ArtistUnicode}"));
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writer.WriteLine(FormattableString.Invariant($"Creator: {beatmap.Metadata.AuthorString}"));
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writer.WriteLine(FormattableString.Invariant($"Version: {beatmap.BeatmapInfo.Version}"));
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if (beatmap.Metadata.Source != null) writer.WriteLine(FormattableString.Invariant($"Source: {beatmap.Metadata.Source}"));
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if (beatmap.Metadata.Tags != null) writer.WriteLine(FormattableString.Invariant($"Tags: {beatmap.Metadata.Tags}"));
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if (beatmap.BeatmapInfo.OnlineBeatmapID != null) writer.WriteLine(FormattableString.Invariant($"BeatmapID: {beatmap.BeatmapInfo.OnlineBeatmapID}"));
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if (beatmap.BeatmapInfo.BeatmapSet?.OnlineBeatmapSetID != null) writer.WriteLine(FormattableString.Invariant($"BeatmapSetID: {beatmap.BeatmapInfo.BeatmapSet.OnlineBeatmapSetID}"));
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}
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private void handleDifficulty(TextWriter writer)
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{
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writer.WriteLine("[Difficulty]");
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writer.WriteLine(FormattableString.Invariant($"HPDrainRate: {beatmap.BeatmapInfo.BaseDifficulty.DrainRate}"));
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writer.WriteLine(FormattableString.Invariant($"CircleSize: {beatmap.BeatmapInfo.BaseDifficulty.CircleSize}"));
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writer.WriteLine(FormattableString.Invariant($"OverallDifficulty: {beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty}"));
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writer.WriteLine(FormattableString.Invariant($"ApproachRate: {beatmap.BeatmapInfo.BaseDifficulty.ApproachRate}"));
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// Taiko adjusts the slider multiplier (see: TaikoBeatmapConverter.LEGACY_VELOCITY_MULTIPLIER)
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writer.WriteLine(beatmap.BeatmapInfo.RulesetID == 1
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? FormattableString.Invariant($"SliderMultiplier: {beatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier / 1.4f}")
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: FormattableString.Invariant($"SliderMultiplier: {beatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier}"));
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writer.WriteLine(FormattableString.Invariant($"SliderTickRate: {beatmap.BeatmapInfo.BaseDifficulty.SliderTickRate}"));
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}
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private void handleEvents(TextWriter writer)
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{
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writer.WriteLine("[Events]");
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if (!string.IsNullOrEmpty(beatmap.BeatmapInfo.Metadata.BackgroundFile))
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writer.WriteLine(FormattableString.Invariant($"{(int)LegacyEventType.Background},0,\"{beatmap.BeatmapInfo.Metadata.BackgroundFile}\",0,0"));
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foreach (var b in beatmap.Breaks)
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writer.WriteLine(FormattableString.Invariant($"{(int)LegacyEventType.Break},{b.StartTime},{b.EndTime}"));
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}
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private void handleControlPoints(TextWriter writer)
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{
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if (beatmap.ControlPointInfo.Groups.Count == 0)
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return;
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writer.WriteLine("[TimingPoints]");
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foreach (var group in beatmap.ControlPointInfo.Groups)
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{
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var groupTimingPoint = group.ControlPoints.OfType<TimingControlPoint>().FirstOrDefault();
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// If the group contains a timing control point, it needs to be output separately.
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if (groupTimingPoint != null)
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{
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writer.Write(FormattableString.Invariant($"{groupTimingPoint.Time},"));
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writer.Write(FormattableString.Invariant($"{groupTimingPoint.BeatLength},"));
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outputControlPointEffectsAt(groupTimingPoint.Time, true);
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}
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// Output any remaining effects as secondary non-timing control point.
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var difficultyPoint = beatmap.ControlPointInfo.DifficultyPointAt(group.Time);
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writer.Write(FormattableString.Invariant($"{group.Time},"));
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writer.Write(FormattableString.Invariant($"{-100 / difficultyPoint.SpeedMultiplier},"));
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outputControlPointEffectsAt(group.Time, false);
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}
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void outputControlPointEffectsAt(double time, bool isTimingPoint)
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{
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var samplePoint = beatmap.ControlPointInfo.SamplePointAt(time);
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var effectPoint = beatmap.ControlPointInfo.EffectPointAt(time);
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// Apply the control point to a hit sample to uncover legacy properties (e.g. suffix)
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HitSampleInfo tempHitSample = samplePoint.ApplyTo(new ConvertHitObjectParser.LegacyHitSampleInfo(string.Empty));
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// Convert effect flags to the legacy format
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LegacyEffectFlags effectFlags = LegacyEffectFlags.None;
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if (effectPoint.KiaiMode)
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effectFlags |= LegacyEffectFlags.Kiai;
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if (effectPoint.OmitFirstBarLine)
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effectFlags |= LegacyEffectFlags.OmitFirstBarLine;
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writer.Write(FormattableString.Invariant($"{(int)beatmap.ControlPointInfo.TimingPointAt(time).TimeSignature},"));
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writer.Write(FormattableString.Invariant($"{(int)toLegacySampleBank(tempHitSample.Bank)},"));
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writer.Write(FormattableString.Invariant($"{toLegacyCustomSampleBank(tempHitSample)},"));
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writer.Write(FormattableString.Invariant($"{tempHitSample.Volume},"));
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writer.Write(FormattableString.Invariant($"{(isTimingPoint ? '1' : '0')},"));
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writer.Write(FormattableString.Invariant($"{(int)effectFlags}"));
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writer.WriteLine();
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}
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}
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private void handleColours(TextWriter writer)
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{
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var colours = skin?.GetConfig<GlobalSkinColours, IReadOnlyList<Color4>>(GlobalSkinColours.ComboColours)?.Value;
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if (colours == null || colours.Count == 0)
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return;
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writer.WriteLine("[Colours]");
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for (var i = 0; i < colours.Count; i++)
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{
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var comboColour = colours[i];
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writer.Write(FormattableString.Invariant($"Combo{i}: "));
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writer.Write(FormattableString.Invariant($"{(byte)(comboColour.R * byte.MaxValue)},"));
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writer.Write(FormattableString.Invariant($"{(byte)(comboColour.G * byte.MaxValue)},"));
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writer.Write(FormattableString.Invariant($"{(byte)(comboColour.B * byte.MaxValue)},"));
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writer.Write(FormattableString.Invariant($"{(byte)(comboColour.A * byte.MaxValue)}"));
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writer.WriteLine();
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}
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}
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private void handleHitObjects(TextWriter writer)
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{
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writer.WriteLine("[HitObjects]");
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if (beatmap.HitObjects.Count == 0)
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return;
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foreach (var h in beatmap.HitObjects)
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handleHitObject(writer, h);
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}
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private void handleHitObject(TextWriter writer, HitObject hitObject)
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{
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Vector2 position = new Vector2(256, 192);
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switch (beatmap.BeatmapInfo.RulesetID)
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{
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case 0:
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case 2:
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position = ((IHasPosition)hitObject).Position;
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break;
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case 3:
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int totalColumns = (int)Math.Max(1, beatmap.BeatmapInfo.BaseDifficulty.CircleSize);
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position.X = (int)Math.Ceiling(((IHasXPosition)hitObject).X * (512f / totalColumns));
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break;
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}
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writer.Write(FormattableString.Invariant($"{position.X},"));
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writer.Write(FormattableString.Invariant($"{position.Y},"));
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writer.Write(FormattableString.Invariant($"{hitObject.StartTime},"));
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writer.Write(FormattableString.Invariant($"{(int)getObjectType(hitObject)},"));
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writer.Write(FormattableString.Invariant($"{(int)toLegacyHitSoundType(hitObject.Samples)},"));
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if (hitObject is IHasPath path)
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{
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addPathData(writer, path, position);
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writer.Write(getSampleBank(hitObject.Samples));
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}
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else
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{
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if (hitObject is IHasDuration)
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addEndTimeData(writer, hitObject);
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writer.Write(getSampleBank(hitObject.Samples));
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}
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writer.WriteLine();
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}
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private LegacyHitObjectType getObjectType(HitObject hitObject)
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{
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LegacyHitObjectType type = 0;
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if (hitObject is IHasCombo combo)
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{
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type = (LegacyHitObjectType)(combo.ComboOffset << 4);
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if (combo.NewCombo)
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type |= LegacyHitObjectType.NewCombo;
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}
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switch (hitObject)
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{
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case IHasPath _:
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type |= LegacyHitObjectType.Slider;
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break;
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case IHasDuration _:
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if (beatmap.BeatmapInfo.RulesetID == 3)
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type |= LegacyHitObjectType.Hold;
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else
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type |= LegacyHitObjectType.Spinner;
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break;
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default:
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type |= LegacyHitObjectType.Circle;
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break;
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}
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return type;
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}
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private void addPathData(TextWriter writer, IHasPath pathData, Vector2 position)
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{
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PathType? lastType = null;
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for (int i = 0; i < pathData.Path.ControlPoints.Count; i++)
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{
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PathControlPoint point = pathData.Path.ControlPoints[i];
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if (point.Type != null)
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{
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// We've reached a new (explicit) segment!
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// Explicit segments have a new format in which the type is injected into the middle of the control point string.
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// To preserve compatibility with osu-stable as much as possible, explicit segments with the same type are converted to use implicit segments by duplicating the control point.
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// One exception are consecutive perfect curves, which aren't supported in osu!stable and can lead to decoding issues if encoded as implicit segments
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bool needsExplicitSegment = point.Type != lastType || point.Type == PathType.PerfectCurve;
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// Another exception to this is when the last two control points of the last segment were duplicated. This is not a scenario supported by osu!stable.
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// Lazer does not add implicit segments for the last two control points of _any_ explicit segment, so an explicit segment is forced in order to maintain consistency with the decoder.
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if (i > 1)
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{
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// We need to use the absolute control point position to determine equality, otherwise floating point issues may arise.
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Vector2 p1 = position + pathData.Path.ControlPoints[i - 1].Position;
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Vector2 p2 = position + pathData.Path.ControlPoints[i - 2].Position;
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if ((int)p1.X == (int)p2.X && (int)p1.Y == (int)p2.Y)
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needsExplicitSegment = true;
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}
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if (needsExplicitSegment)
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{
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switch (point.Type)
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{
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case PathType.Bezier:
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writer.Write("B|");
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break;
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case PathType.Catmull:
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writer.Write("C|");
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break;
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case PathType.PerfectCurve:
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writer.Write("P|");
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break;
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case PathType.Linear:
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writer.Write("L|");
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break;
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}
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lastType = point.Type;
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}
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else
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{
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// New segment with the same type - duplicate the control point
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writer.Write(FormattableString.Invariant($"{position.X + point.Position.X}:{position.Y + point.Position.Y}|"));
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}
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}
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if (i != 0)
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{
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writer.Write(FormattableString.Invariant($"{position.X + point.Position.X}:{position.Y + point.Position.Y}"));
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writer.Write(i != pathData.Path.ControlPoints.Count - 1 ? "|" : ",");
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}
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}
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var curveData = pathData as IHasPathWithRepeats;
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writer.Write(FormattableString.Invariant($"{(curveData?.RepeatCount ?? 0) + 1},"));
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writer.Write(FormattableString.Invariant($"{pathData.Path.Distance},"));
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if (curveData != null)
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{
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for (int i = 0; i < curveData.NodeSamples.Count; i++)
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{
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writer.Write(FormattableString.Invariant($"{(int)toLegacyHitSoundType(curveData.NodeSamples[i])}"));
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writer.Write(i != curveData.NodeSamples.Count - 1 ? "|" : ",");
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}
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for (int i = 0; i < curveData.NodeSamples.Count; i++)
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{
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writer.Write(getSampleBank(curveData.NodeSamples[i], true));
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writer.Write(i != curveData.NodeSamples.Count - 1 ? "|" : ",");
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}
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}
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}
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private void addEndTimeData(TextWriter writer, HitObject hitObject)
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{
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var endTimeData = (IHasDuration)hitObject;
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var type = getObjectType(hitObject);
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char suffix = ',';
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// Holds write the end time as if it's part of sample data.
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if (type == LegacyHitObjectType.Hold)
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suffix = ':';
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writer.Write(FormattableString.Invariant($"{endTimeData.EndTime}{suffix}"));
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}
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private string getSampleBank(IList<HitSampleInfo> samples, bool banksOnly = false)
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{
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LegacySampleBank normalBank = toLegacySampleBank(samples.SingleOrDefault(s => s.Name == HitSampleInfo.HIT_NORMAL)?.Bank);
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LegacySampleBank addBank = toLegacySampleBank(samples.FirstOrDefault(s => !string.IsNullOrEmpty(s.Name) && s.Name != HitSampleInfo.HIT_NORMAL)?.Bank);
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StringBuilder sb = new StringBuilder();
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sb.Append(FormattableString.Invariant($"{(int)normalBank}:"));
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sb.Append(FormattableString.Invariant($"{(int)addBank}"));
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if (!banksOnly)
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{
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string customSampleBank = toLegacyCustomSampleBank(samples.FirstOrDefault(s => !string.IsNullOrEmpty(s.Name)));
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string sampleFilename = samples.FirstOrDefault(s => string.IsNullOrEmpty(s.Name))?.LookupNames.First() ?? string.Empty;
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int volume = samples.FirstOrDefault()?.Volume ?? 100;
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sb.Append(':');
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sb.Append(FormattableString.Invariant($"{customSampleBank}:"));
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sb.Append(FormattableString.Invariant($"{volume}:"));
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sb.Append(FormattableString.Invariant($"{sampleFilename}"));
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}
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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 "normal":
|
|
return LegacySampleBank.Normal;
|
|
|
|
case "soft":
|
|
return LegacySampleBank.Soft;
|
|
|
|
case "drum":
|
|
return LegacySampleBank.Drum;
|
|
|
|
default:
|
|
return LegacySampleBank.None;
|
|
}
|
|
}
|
|
|
|
private string toLegacyCustomSampleBank(HitSampleInfo hitSampleInfo)
|
|
{
|
|
if (hitSampleInfo is ConvertHitObjectParser.LegacyHitSampleInfo legacy)
|
|
return legacy.CustomSampleBank.ToString(CultureInfo.InvariantCulture);
|
|
|
|
return "0";
|
|
}
|
|
}
|
|
}
|