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remove all redundancies from encoded control points

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This commit is contained in:
OliBomby 2023-05-01 16:53:38 +02:00
parent 8302bb1f37
commit 8c21fddb5e
1 changed files with 54 additions and 18 deletions
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72
osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs
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@ -5,6 +5,7 @@
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
@ -170,6 +171,24 @@ namespace osu.Game.Beatmaps.Formats
writer.WriteLine(FormattableString.Invariant($"{(int)LegacyEventType.Break},{b.StartTime},{b.EndTime}"));
}
private struct LegacyControlPointProperties
{
internal double SliderVelocity { get; set; }
internal int TimingSignature { get; init; }
internal int SampleBank { get; init; }
internal int CustomSampleBank { get; init; }
internal int SampleVolume { get; init; }
internal LegacyEffectFlags EffectFlags { get; init; }
internal bool IsRedundant(LegacyControlPointProperties other) =>
SliderVelocity == other.SliderVelocity &&
TimingSignature == other.TimingSignature &&
SampleBank == other.SampleBank &&
CustomSampleBank == other.CustomSampleBank &&
SampleVolume == other.SampleVolume &&
EffectFlags == other.EffectFlags;
}
private void handleControlPoints(TextWriter writer)
{
var legacyControlPoints = new LegacyControlPointInfo();
@ -195,41 +214,44 @@ namespace osu.Game.Beatmaps.Formats
legacyControlPoints.Add(point.Time, new DifficultyControlPoint { SliderVelocity = point.ScrollSpeed });
}
int lastCustomSampleIndex = 0;
LegacyControlPointProperties lastControlPointProperties = new LegacyControlPointProperties();
foreach (var group in legacyControlPoints.Groups)
{
var groupTimingPoint = group.ControlPoints.OfType<TimingControlPoint>().FirstOrDefault();
var controlPointProperties = getLegacyControlPointProperties(group, groupTimingPoint != null);
// If the group contains a timing control point, it needs to be output separately.
if (groupTimingPoint != null)
{
writer.Write(FormattableString.Invariant($"{groupTimingPoint.Time},"));
writer.Write(FormattableString.Invariant($"{groupTimingPoint.BeatLength},"));
outputControlPointAt(groupTimingPoint.Time, true);
outputControlPointAt(controlPointProperties, true);
lastControlPointProperties = controlPointProperties;
lastControlPointProperties.SliderVelocity = 1;
}
if (controlPointProperties.IsRedundant(lastControlPointProperties))
continue;
// Output any remaining effects as secondary non-timing control point.
var difficultyPoint = legacyControlPoints.DifficultyPointAt(group.Time);
writer.Write(FormattableString.Invariant($"{group.Time},"));
writer.Write(FormattableString.Invariant($"{-100 / difficultyPoint.SliderVelocity},"));
outputControlPointAt(group.Time, false);
writer.Write(FormattableString.Invariant($"{-100 / controlPointProperties.SliderVelocity},"));
outputControlPointAt(controlPointProperties, false);
lastControlPointProperties = controlPointProperties;
}
void outputControlPointAt(double time, bool isTimingPoint)
LegacyControlPointProperties getLegacyControlPointProperties(ControlPointGroup group, bool updateSampleBank)
{
double time = group.Time;
var timingPoint = legacyControlPoints.TimingPointAt(time);
var difficultyPoint = legacyControlPoints.DifficultyPointAt(time);
var samplePoint = legacyControlPoints.SamplePointAt(time);
var effectPoint = legacyControlPoints.EffectPointAt(time);
var timingPoint = legacyControlPoints.TimingPointAt(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));
// Inherit the previous sample bank if the current sample bank is not set
int customSampleBank = toLegacyCustomSampleBank(tempHitSample);
if (customSampleBank < 0)
customSampleBank = lastCustomSampleIndex;
lastCustomSampleIndex = customSampleBank;
// Convert effect flags to the legacy format
LegacyEffectFlags effectFlags = LegacyEffectFlags.None;
@ -238,12 +260,26 @@ namespace osu.Game.Beatmaps.Formats
if (timingPoint.OmitFirstBarLine)
effectFlags |= LegacyEffectFlags.OmitFirstBarLine;
writer.Write(FormattableString.Invariant($"{timingPoint.TimeSignature.Numerator},"));
writer.Write(FormattableString.Invariant($"{(int)toLegacySampleBank(tempHitSample.Bank)},"));
writer.Write(FormattableString.Invariant($"{customSampleBank},"));
writer.Write(FormattableString.Invariant($"{tempHitSample.Volume},"));
writer.Write(FormattableString.Invariant($"{(isTimingPoint ? '1' : '0')},"));
writer.Write(FormattableString.Invariant($"{(int)effectFlags}"));
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();
}