osu/osu.Game/Rulesets/Mods/MetronomeBeatContainer.cs

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2021-07-29 06:52:18 +00:00
// 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 osu.Framework.Allocation;
using osu.Framework.Audio.Track;
using osu.Framework.Graphics;
using osu.Game.Audio;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.Graphics.Containers;
using osu.Game.Skinning;
namespace osu.Game.Rulesets.Mods
{
public class MetronomeBeatContainer : BeatSyncedContainer
{
private readonly double firstHitTime;
private PausableSkinnableSound sample;
/// <param name="firstHitTime">Start time of the first hit object, used for providing a count down.</param>
public MetronomeBeatContainer(double firstHitTime)
{
this.firstHitTime = firstHitTime;
AllowMistimedEventFiring = false;
Divisor = 1;
}
[BackgroundDependencyLoader]
private void load()
{
InternalChildren = new Drawable[]
{
sample = new PausableSkinnableSound(new SampleInfo("Gameplay/catch-banana"))
};
}
protected override void OnNewBeat(int beatIndex, TimingControlPoint timingPoint, EffectControlPoint effectPoint, ChannelAmplitudes amplitudes)
{
base.OnNewBeat(beatIndex, timingPoint, effectPoint, amplitudes);
if (!IsBeatSyncedWithTrack) return;
int timeSignature = (int)timingPoint.TimeSignature;
// play metronome from one measure before the first object.
if (BeatSyncClock.CurrentTime < firstHitTime - timingPoint.BeatLength * timeSignature)
return;
sample.Frequency.Value = beatIndex % timeSignature == 0 ? 1 : 0.5f;
sample.Play();
}
}
}