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411 lines
18 KiB
C#
411 lines
18 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.IO;
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using System.Linq;
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using System.Text;
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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.Types;
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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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public LegacyBeatmapEncoder(IBeatmap beatmap)
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{
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this.beatmap = beatmap;
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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($"osu file format v{LATEST_VERSION}");
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writer.WriteLine();
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handleGeneral(writer);
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writer.WriteLine();
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handleEditor(writer);
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writer.WriteLine();
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handleMetadata(writer);
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writer.WriteLine();
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handleDifficulty(writer);
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writer.WriteLine();
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handleEvents(writer);
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writer.WriteLine();
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handleTimingPoints(writer);
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writer.WriteLine();
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handleHitObjects(writer);
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}
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private void handleGeneral(TextWriter writer)
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{
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writer.WriteLine("[General]");
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writer.WriteLine(FormattableString.Invariant($"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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// Todo: Not all countdown types are supported by lazer yet
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writer.WriteLine(FormattableString.Invariant($"Countdown: {(beatmap.BeatmapInfo.Countdown ? '1' : '0')}"));
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writer.WriteLine(FormattableString.Invariant($"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($"LetterboxInBreaks: {(beatmap.BeatmapInfo.LetterboxInBreaks ? '1' : '0')}"));
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// if (beatmap.BeatmapInfo.UseSkinSprites)
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// writer.WriteLine(@"UseSkinSprites: 1");
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// if (b.AlwaysShowPlayfield)
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// writer.WriteLine(@"AlwaysShowPlayfield: 1");
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// if (b.OverlayPosition != OverlayPosition.NoChange)
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// writer.WriteLine(@"OverlayPosition: " + b.OverlayPosition);
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// if (!string.IsNullOrEmpty(b.SkinPreference))
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// writer.WriteLine(@"SkinPreference:" + b.SkinPreference);
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// if (b.EpilepsyWarning)
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// writer.WriteLine(@"EpilepsyWarning: 1");
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// if (b.CountdownOffset > 0)
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// writer.WriteLine(@"CountdownOffset: " + b.CountdownOffset.ToString());
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if (beatmap.BeatmapInfo.RulesetID == 3)
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writer.WriteLine(FormattableString.Invariant($"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($"Title: {beatmap.Metadata.Title}"));
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writer.WriteLine(FormattableString.Invariant($"TitleUnicode: {beatmap.Metadata.TitleUnicode}"));
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writer.WriteLine(FormattableString.Invariant($"Artist: {beatmap.Metadata.Artist}"));
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writer.WriteLine(FormattableString.Invariant($"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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writer.WriteLine(FormattableString.Invariant($"Source: {beatmap.Metadata.Source}"));
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writer.WriteLine(FormattableString.Invariant($"Tags: {beatmap.Metadata.Tags}"));
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writer.WriteLine(FormattableString.Invariant($"BeatmapID: {beatmap.BeatmapInfo.OnlineBeatmapID ?? 0}"));
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writer.WriteLine(FormattableString.Invariant($"BeatmapSetID: {beatmap.BeatmapInfo.BeatmapSet.OnlineBeatmapSetID ?? -1}"));
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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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writer.WriteLine(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($"{(int)LegacyEventType.Background},0,\"{beatmap.BeatmapInfo.Metadata.BackgroundFile}\",0,0"));
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if (!string.IsNullOrEmpty(beatmap.BeatmapInfo.Metadata.VideoFile))
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writer.WriteLine(FormattableString.Invariant($"{(int)LegacyEventType.Video},0,\"{beatmap.BeatmapInfo.Metadata.VideoFile}\",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 handleTimingPoints(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 timingPoint = group.ControlPoints.OfType<TimingControlPoint>().FirstOrDefault();
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var difficultyPoint = beatmap.ControlPointInfo.DifficultyPointAt(group.Time);
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var samplePoint = beatmap.ControlPointInfo.SamplePointAt(group.Time);
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var effectPoint = beatmap.ControlPointInfo.EffectPointAt(group.Time);
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// Convert beat length the legacy format
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double beatLength;
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if (timingPoint != null)
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beatLength = timingPoint.BeatLength;
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else
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beatLength = -100 / difficultyPoint.SpeedMultiplier;
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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 HitSampleInfo());
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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($"{group.Time},"));
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writer.Write(FormattableString.Invariant($"{beatLength},"));
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writer.Write(FormattableString.Invariant($"{(int)beatmap.ControlPointInfo.TimingPointAt(group.Time).TimeSignature},"));
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writer.Write(FormattableString.Invariant($"{(int)toLegacySampleBank(tempHitSample.Bank)},"));
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writer.Write(FormattableString.Invariant($"{toLegacyCustomSampleBank(tempHitSample.Suffix)},"));
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writer.Write(FormattableString.Invariant($"{tempHitSample.Volume},"));
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writer.Write(FormattableString.Invariant($"{(timingPoint != null ? '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 handleHitObjects(TextWriter writer)
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{
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if (beatmap.HitObjects.Count == 0)
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return;
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writer.WriteLine("[HitObjects]");
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switch (beatmap.BeatmapInfo.RulesetID)
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{
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case 0:
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foreach (var h in beatmap.HitObjects)
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handleOsuHitObject(writer, h);
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break;
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case 1:
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foreach (var h in beatmap.HitObjects)
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handleTaikoHitObject(writer, h);
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break;
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case 2:
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foreach (var h in beatmap.HitObjects)
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handleCatchHitObject(writer, h);
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break;
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case 3:
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foreach (var h in beatmap.HitObjects)
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handleManiaHitObject(writer, h);
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break;
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}
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}
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private void handleOsuHitObject(TextWriter writer, HitObject hitObject)
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{
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var positionData = (IHasPosition)hitObject;
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writer.Write(FormattableString.Invariant($"{positionData.X},"));
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writer.Write(FormattableString.Invariant($"{positionData.Y},"));
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writer.Write(FormattableString.Invariant($"{hitObject.StartTime},"));
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writer.Write(FormattableString.Invariant($"{(int)getObjectType(hitObject)},"));
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writer.Write(hitObject is IHasCurve
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? FormattableString.Invariant($"0,")
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: FormattableString.Invariant($"{(int)toLegacyHitSoundType(hitObject.Samples)},"));
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if (hitObject is IHasCurve curveData)
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{
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addCurveData(writer, curveData, positionData);
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writer.Write(getSampleBank(hitObject.Samples, zeroBanks: true));
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}
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else
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{
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if (hitObject is IHasEndTime endTimeData)
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writer.Write(FormattableString.Invariant($"{endTimeData.EndTime},"));
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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 static LegacyHitObjectType getObjectType(HitObject hitObject)
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{
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var comboData = (IHasCombo)hitObject;
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var type = (LegacyHitObjectType)(comboData.ComboOffset << 4);
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if (comboData.NewCombo) type |= LegacyHitObjectType.NewCombo;
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switch (hitObject)
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{
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case IHasCurve _:
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type |= LegacyHitObjectType.Slider;
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break;
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case IHasEndTime _:
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type |= LegacyHitObjectType.Spinner | LegacyHitObjectType.NewCombo;
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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 addCurveData(TextWriter writer, IHasCurve curveData, IHasPosition positionData)
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{
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PathType? lastType = null;
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for (int i = 0; i < curveData.Path.ControlPoints.Count; i++)
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{
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PathControlPoint point = curveData.Path.ControlPoints[i];
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if (point.Type.Value != null)
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{
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if (point.Type.Value != lastType)
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{
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switch (point.Type.Value)
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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.Value;
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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($"{positionData.X + point.Position.Value.X}:{positionData.Y + point.Position.Value.Y}|"));
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}
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}
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if (i != 0)
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{
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writer.Write(FormattableString.Invariant($"{positionData.X + point.Position.Value.X}:{positionData.Y + point.Position.Value.Y}"));
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writer.Write(i != curveData.Path.ControlPoints.Count - 1 ? "|" : ",");
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}
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}
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writer.Write(FormattableString.Invariant($"{curveData.RepeatCount + 1},"));
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writer.Write(FormattableString.Invariant($"{curveData.Path.Distance},"));
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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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private void handleTaikoHitObject(TextWriter writer, HitObject hitObject) => throw new NotImplementedException();
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private void handleCatchHitObject(TextWriter writer, HitObject hitObject) => throw new NotImplementedException();
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private void handleManiaHitObject(TextWriter writer, HitObject hitObject) => throw new NotImplementedException();
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private string getSampleBank(IList<HitSampleInfo> samples, bool banksOnly = false, bool zeroBanks = 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($"{(zeroBanks ? 0 : (int)normalBank)}:"));
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sb.Append(FormattableString.Invariant($"{(zeroBanks ? 0 : (int)addBank)}"));
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if (!banksOnly)
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{
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string customSampleBank = toLegacyCustomSampleBank(samples.FirstOrDefault(s => !string.IsNullOrEmpty(s.Name))?.Suffix);
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string sampleFilename = samples.FirstOrDefault(s => string.IsNullOrEmpty(s.Name))?.LookupNames.First() ?? string.Empty;
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int volume = samples.FirstOrDefault()?.Volume ?? 100;
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sb.Append(":");
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sb.Append(FormattableString.Invariant($"{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();
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}
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private LegacyHitSoundType toLegacyHitSoundType(IList<HitSampleInfo> samples)
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{
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LegacyHitSoundType type = LegacyHitSoundType.None;
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foreach (var sample in samples)
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{
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switch (sample.Name)
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{
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case HitSampleInfo.HIT_WHISTLE:
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type |= LegacyHitSoundType.Whistle;
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break;
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case HitSampleInfo.HIT_FINISH:
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type |= LegacyHitSoundType.Finish;
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break;
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case HitSampleInfo.HIT_CLAP:
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type |= LegacyHitSoundType.Clap;
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break;
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}
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}
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return type;
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}
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private LegacySampleBank toLegacySampleBank(string sampleBank)
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{
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switch (sampleBank?.ToLowerInvariant())
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{
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case "normal":
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return LegacySampleBank.Normal;
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case "soft":
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return LegacySampleBank.Soft;
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case "drum":
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return LegacySampleBank.Drum;
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default:
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return LegacySampleBank.None;
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}
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}
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private string toLegacyCustomSampleBank(string sampleSuffix) => string.IsNullOrEmpty(sampleSuffix) ? "0" : sampleSuffix;
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}
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}
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