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osu-lazer/osu.Game/Storyboards/Drawables/DrawableStoryboardSample.cs
2023-06-24 01:00:03 +09:00

96 lines
3.5 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 System.Collections.Generic;
using System.Linq;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Game.Rulesets.Mods;
using osu.Game.Skinning;
namespace osu.Game.Storyboards.Drawables
{
public partial class DrawableStoryboardSample : PausableSkinnableSound
{
/// <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;
public override bool RemoveWhenNotAlive => false;
public DrawableStoryboardSample(StoryboardSampleInfo sampleInfo)
: base(sampleInfo)
{
this.sampleInfo = sampleInfo;
LifetimeStart = sampleInfo.StartTime;
}
[Resolved]
private IReadOnlyList<Mod>? mods { get; set; }
protected override void SkinChanged(ISkinSource skin)
{
base.SkinChanged(skin);
if (mods != null)
{
foreach (var mod in mods.OfType<IApplicableToSample>())
{
foreach (var sample in DrawableSamples)
mod.ApplyToSample(sample);
}
}
}
protected override void SamplePlaybackDisabledChanged(ValueChangedEvent<bool> disabled)
{
if (!RequestedPlaying) return;
if (!Looping && disabled.NewValue)
{
// the default behaviour for sample disabling is to allow one-shot samples to play out.
// storyboards regularly have long running samples that can cause this behaviour to lead to unintended results.
// for this reason, we immediately stop such samples.
Stop();
}
base.SamplePlaybackDisabledChanged(disabled);
}
protected override void Update()
{
base.Update();
// Check if we've yet to pass the sample start time.
if (Time.Current < sampleInfo.StartTime)
{
Stop();
// Playback has stopped, but if the user fast-forwards to a point after the start time of the sample then
// we must not have a lifetime end in order to continue receiving updates and start the sample below.
LifetimeStart = sampleInfo.StartTime;
LifetimeEnd = double.MaxValue;
return;
}
// Ensure that we've elapsed from a point before the sample's start time before playing.
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 (!RequestedPlaying && Time.Current - sampleInfo.StartTime < allowable_late_start)
Play();
}
// Playback has started, but if the user rewinds to a point before the start time of the sample then
// we must not have a lifetime start in order to continue receiving updates and stop the sample above.
LifetimeStart = double.MinValue;
LifetimeEnd = sampleInfo.StartTime;
}
}
}