osu/osu.Game/Screens/Play/GameplayClock.cs

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// 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.Bindables;
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using osu.Framework.Timing;
using osu.Framework.Utils;
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namespace osu.Game.Screens.Play
{
/// <summary>
/// A clock which is used for gameplay elements that need to follow audio time 1:1.
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/// Exposed via DI by <see cref="GameplayClockContainer"/>.
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/// <remarks>
/// The main purpose of this clock is to stop components using it from accidentally processing the main
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/// <see cref="IFrameBasedClock"/>, as this should only be done once to ensure accuracy.
/// </remarks>
/// </summary>
public class GameplayClock : IFrameBasedClock
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{
private readonly IFrameBasedClock underlyingClock;
public readonly BindableBool IsPaused = new BindableBool();
/// <summary>
/// All adjustments applied to this clock which don't come from gameplay or mods.
/// </summary>
public virtual IEnumerable<Bindable<double>> NonGameplayAdjustments => Enumerable.Empty<Bindable<double>>();
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public GameplayClock(IFrameBasedClock underlyingClock)
{
this.underlyingClock = underlyingClock;
}
public double CurrentTime => underlyingClock.CurrentTime;
public double Rate => underlyingClock.Rate;
/// <summary>
/// The rate of gameplay when playback is at 100%.
/// This excludes any seeking / user adjustments.
/// </summary>
public double TrueGameplayRate
{
get
{
double baseRate = Rate;
foreach (var adjustment in NonGameplayAdjustments)
{
if (Precision.AlmostEquals(adjustment.Value, 0))
return 0;
baseRate /= adjustment.Value;
}
return baseRate;
}
}
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public bool IsRunning => underlyingClock.IsRunning;
public void ProcessFrame()
{
// intentionally not updating the underlying clock (handled externally).
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}
public double ElapsedFrameTime => underlyingClock.ElapsedFrameTime;
public double FramesPerSecond => underlyingClock.FramesPerSecond;
public FrameTimeInfo TimeInfo => underlyingClock.TimeInfo;
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public IClock Source => underlyingClock;
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}
}