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osu-lazer/osu.Game/Screens/Edit/Timing/WaveformComparisonDisplay.cs
2022-05-25 19:25:23 +09:00

219 lines
7.4 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.
#nullable enable
using System;
using System.Linq;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Audio;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Input.Events;
using osu.Game.Beatmaps;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.Graphics.Sprites;
using osu.Game.Graphics.UserInterfaceV2;
using osu.Game.Overlays;
using osuTK;
using osuTK.Graphics;
namespace osu.Game.Screens.Edit.Timing
{
internal class WaveformComparisonDisplay : CompositeDrawable
{
private const int total_waveforms = 8;
private readonly BindableNumber<double> beatLength = new BindableDouble();
[Resolved]
private IBindable<WorkingBeatmap> beatmap { get; set; } = null!;
[Resolved]
private EditorBeatmap editorBeatmap { get; set; } = null!;
[Resolved]
private Bindable<ControlPointGroup?> selectedGroup { get; set; } = null!;
[Resolved]
private EditorClock editorClock { get; set; } = null!;
private TimingControlPoint timingPoint = TimingControlPoint.DEFAULT;
private int lastDisplayedBeatIndex;
private double selectedGroupStartTime;
private double selectedGroupEndTime;
private readonly IBindableList<ControlPointGroup> controlPointGroups = new BindableList<ControlPointGroup>();
public WaveformComparisonDisplay()
{
RelativeSizeAxes = Axes.Both;
CornerRadius = LabelledDrawable<Drawable>.CORNER_RADIUS;
Masking = true;
}
protected override void LoadComplete()
{
base.LoadComplete();
for (int i = 0; i < total_waveforms; i++)
{
AddInternal(new WaveformRow
{
RelativeSizeAxes = Axes.Both,
RelativePositionAxes = Axes.Both,
Height = 1f / total_waveforms,
Y = (float)i / total_waveforms,
});
}
AddInternal(new Circle
{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
Colour = Color4.White,
RelativeSizeAxes = Axes.Y,
Width = 3,
});
selectedGroup.BindValueChanged(_ => updateTimingGroup(), true);
controlPointGroups.BindTo(editorBeatmap.ControlPointInfo.Groups);
controlPointGroups.BindCollectionChanged((_, __) => updateTimingGroup());
beatLength.BindValueChanged(_ => showFrom(lastDisplayedBeatIndex), true);
}
private void updateTimingGroup()
{
beatLength.UnbindBindings();
selectedGroupStartTime = 0;
selectedGroupEndTime = beatmap.Value.Track.Length;
var tcp = selectedGroup.Value?.ControlPoints.OfType<TimingControlPoint>().FirstOrDefault();
if (tcp == null)
{
timingPoint = new TimingControlPoint();
return;
}
timingPoint = tcp;
beatLength.BindTo(timingPoint.BeatLengthBindable);
selectedGroupStartTime = selectedGroup.Value?.Time ?? 0;
var nextGroup = editorBeatmap.ControlPointInfo.TimingPoints
.SkipWhile(g => g != tcp)
.Skip(1)
.FirstOrDefault();
if (nextGroup != null)
selectedGroupEndTime = nextGroup.Time;
}
protected override bool OnHover(HoverEvent e) => true;
protected override bool OnMouseMove(MouseMoveEvent e)
{
float trackLength = (float)beatmap.Value.Track.Length;
int totalBeatsAvailable = (int)(trackLength / timingPoint.BeatLength);
Scheduler.AddOnce(showFrom, (int)(e.MousePosition.X / DrawWidth * totalBeatsAvailable));
return base.OnMouseMove(e);
}
protected override void Update()
{
base.Update();
if (!IsHovered)
{
int currentBeat = (int)Math.Floor((editorClock.CurrentTimeAccurate - selectedGroupStartTime) / timingPoint.BeatLength);
showFrom(currentBeat);
}
}
private void showFrom(int beatIndex)
{
if (lastDisplayedBeatIndex == beatIndex)
return;
// Chosen as a pretty usable number across all BPMs.
// Optimally we'd want this to scale with the BPM in question, but performing
// scaling of the display is both expensive in resampling, and decreases usability
// (as it is harder to track the waveform when making realtime adjustments).
const float visible_width = 300;
float trackLength = (float)beatmap.Value.Track.Length;
float scale = trackLength / visible_width;
// Start displaying from before the current beat
beatIndex -= total_waveforms / 2;
foreach (var row in InternalChildren.OfType<WaveformRow>())
{
// offset to the required beat index.
double time = selectedGroupStartTime + beatIndex * timingPoint.BeatLength;
float offset = (float)(time - visible_width / 2) / trackLength * scale;
row.Alpha = time < selectedGroupStartTime || time > selectedGroupEndTime ? 0.2f : 1;
row.WaveformOffset = -offset;
row.WaveformScale = new Vector2(scale, 1);
row.BeatIndex = beatIndex++;
}
lastDisplayedBeatIndex = beatIndex;
}
internal class WaveformRow : CompositeDrawable
{
private OsuSpriteText beatIndexText = null!;
private WaveformGraph waveformGraph = null!;
[Resolved]
private OverlayColourProvider colourProvider { get; set; } = null!;
[BackgroundDependencyLoader]
private void load(IBindable<WorkingBeatmap> beatmap)
{
InternalChildren = new Drawable[]
{
waveformGraph = new WaveformGraph
{
RelativeSizeAxes = Axes.Both,
RelativePositionAxes = Axes.Both,
Waveform = beatmap.Value.Waveform,
Resolution = 1,
BaseColour = colourProvider.Colour0,
LowColour = colourProvider.Colour1,
MidColour = colourProvider.Colour2,
HighColour = colourProvider.Colour4,
},
beatIndexText = new OsuSpriteText
{
Anchor = Anchor.CentreLeft,
Origin = Anchor.CentreLeft,
Padding = new MarginPadding(5),
Colour = colourProvider.Content2
}
};
}
public int BeatIndex { set => beatIndexText.Text = value.ToString(); }
public Vector2 WaveformScale { set => waveformGraph.Scale = value; }
public float WaveformOffset { set => waveformGraph.X = value; }
}
}
}