osu/osu.Game/Storyboards/Drawables/DrawableStoryboardSample.cs

75 lines
2.8 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.
using osu.Framework.Allocation;
using osu.Framework.Audio.Sample;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Game.Beatmaps;
namespace osu.Game.Storyboards.Drawables
{
public class DrawableStoryboardSample : Component
{
/// <summary>
/// The amount of time allowable beyond the start time of the sample, for the sample to start.
/// </summary>
private const double allowable_late_start = 100;
private readonly StoryboardSampleInfo sampleInfo;
private SampleChannel channel;
public override bool RemoveWhenNotAlive => false;
public DrawableStoryboardSample(StoryboardSampleInfo sampleInfo)
{
this.sampleInfo = sampleInfo;
LifetimeStart = sampleInfo.StartTime;
}
[BackgroundDependencyLoader]
private void load(IBindable<WorkingBeatmap> beatmap)
{
channel = beatmap.Value.Skin.GetSample(sampleInfo);
if (channel != null)
channel.Volume.Value = sampleInfo.Volume / 100.0;
}
protected override void Update()
{
base.Update();
// TODO: this logic will need to be consolidated with other game samples like hit sounds.
if (Time.Current < sampleInfo.StartTime)
{
// We've rewound before the start time of the sample
channel?.Stop();
// In the case that the user fast-forwards to a point far beyond the start time of the sample,
// we want to be able to fall into the if-conditional below (therefore we must not have a life time end)
LifetimeStart = sampleInfo.StartTime;
LifetimeEnd = double.MaxValue;
}
else if (Time.Current - Time.Elapsed < sampleInfo.StartTime)
{
// We've passed the start time of the sample. We only play the sample if we're within an allowable range
// from the sample's start, to reduce layering if we've been fast-forwarded far into the future
if (Time.Current - sampleInfo.StartTime < allowable_late_start)
channel?.Play();
// In the case that the user rewinds to a point far behind the start time of the sample,
// we want to be able to fall into the if-conditional above (therefore we must not have a life time start)
LifetimeStart = double.MinValue;
LifetimeEnd = sampleInfo.StartTime;
}
}
protected override void Dispose(bool isDisposing)
{
channel?.Stop();
base.Dispose(isDisposing);
}
}
}