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osu-lazer/osu.Game/Beatmaps/WorkingBeatmap.cs
2018-10-23 14:59:21 +09:00

246 lines
9.5 KiB
C#

// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using osu.Framework.Audio.Track;
using osu.Framework.Configuration;
using osu.Framework.Graphics.Textures;
using osu.Game.Rulesets.Mods;
using System;
using System.Collections.Generic;
using System.Linq;
using osu.Game.Storyboards;
using osu.Framework.IO.File;
using System.IO;
using System.Threading;
using osu.Game.IO.Serialization;
using osu.Game.Rulesets;
using osu.Game.Rulesets.Objects;
using osu.Game.Rulesets.UI;
using osu.Game.Skinning;
namespace osu.Game.Beatmaps
{
public abstract partial class WorkingBeatmap : IDisposable
{
public readonly BeatmapInfo BeatmapInfo;
public readonly BeatmapSetInfo BeatmapSetInfo;
public readonly BeatmapMetadata Metadata;
public readonly Bindable<IEnumerable<Mod>> Mods = new Bindable<IEnumerable<Mod>>(new Mod[] { });
protected WorkingBeatmap(BeatmapInfo beatmapInfo)
{
BeatmapInfo = beatmapInfo;
BeatmapSetInfo = beatmapInfo.BeatmapSet;
Metadata = beatmapInfo.Metadata ?? BeatmapSetInfo?.Metadata ?? new BeatmapMetadata();
Mods.ValueChanged += mods => applyRateAdjustments();
beatmap = new RecyclableLazy<IBeatmap>(() =>
{
var b = GetBeatmap() ?? new Beatmap();
// The original beatmap version needs to be preserved as the database doesn't contain it
BeatmapInfo.BeatmapVersion = b.BeatmapInfo.BeatmapVersion;
// Use the database-backed info for more up-to-date values (beatmap id, ranked status, etc)
b.BeatmapInfo = BeatmapInfo;
return b;
});
track = new RecyclableLazy<Track>(() =>
{
// we want to ensure that we always have a track, even if it's a fake one.
var t = GetTrack() ?? new VirtualBeatmapTrack(Beatmap);
applyRateAdjustments(t);
return t;
});
background = new RecyclableLazy<Texture>(GetBackground, BackgroundStillValid);
waveform = new RecyclableLazy<Waveform>(GetWaveform);
storyboard = new RecyclableLazy<Storyboard>(GetStoryboard);
skin = new RecyclableLazy<Skin>(GetSkin);
}
/// <summary>
/// Saves the <see cref="Beatmaps.Beatmap"/>.
/// </summary>
/// <returns>The absolute path of the output file.</returns>
public string Save()
{
var path = FileSafety.GetTempPath(Guid.NewGuid().ToString().Replace("-", string.Empty) + ".json");
using (var sw = new StreamWriter(path))
sw.WriteLine(Beatmap.Serialize());
return path;
}
/// <summary>
/// Constructs a playable <see cref="IBeatmap"/> from <see cref="Beatmap"/> using the applicable converters for a specific <see cref="RulesetInfo"/>.
/// <para>
/// The returned <see cref="IBeatmap"/> is in a playable state - all <see cref="HitObject"/> and <see cref="BeatmapDifficulty"/> <see cref="Mod"/>s
/// have been applied, and <see cref="HitObject"/>s have been fully constructed.
/// </para>
/// </summary>
/// <param name="ruleset">The <see cref="RulesetInfo"/> to create a playable <see cref="IBeatmap"/> for.</param>
/// <returns>The converted <see cref="IBeatmap"/>.</returns>
/// <exception cref="BeatmapInvalidForRulesetException">If <see cref="Beatmap"/> could not be converted to <paramref name="ruleset"/>.</exception>
public IBeatmap GetPlayableBeatmap(RulesetInfo ruleset)
{
var rulesetInstance = ruleset.CreateInstance();
IBeatmapConverter converter = rulesetInstance.CreateBeatmapConverter(Beatmap);
// Check if the beatmap can be converted
if (!converter.CanConvert)
throw new BeatmapInvalidForRulesetException($"{nameof(Beatmaps.Beatmap)} can not be converted for the ruleset (ruleset: {ruleset.InstantiationInfo}, converter: {converter}).");
// Apply conversion mods
foreach (var mod in Mods.Value.OfType<IApplicableToBeatmapConverter>())
mod.ApplyToBeatmapConverter(converter);
// Convert
IBeatmap converted = converter.Convert();
// Apply difficulty mods
if (Mods.Value.Any(m => m is IApplicableToDifficulty))
{
converted.BeatmapInfo = converted.BeatmapInfo.Clone();
converted.BeatmapInfo.BaseDifficulty = converted.BeatmapInfo.BaseDifficulty.Clone();
foreach (var mod in Mods.Value.OfType<IApplicableToDifficulty>())
mod.ApplyToDifficulty(converted.BeatmapInfo.BaseDifficulty);
}
IBeatmapProcessor processor = rulesetInstance.CreateBeatmapProcessor(converted);
processor?.PreProcess();
// Compute default values for hitobjects, including creating nested hitobjects in-case they're needed
foreach (var obj in converted.HitObjects)
obj.ApplyDefaults(converted.ControlPointInfo, converted.BeatmapInfo.BaseDifficulty);
foreach (var mod in Mods.Value.OfType<IApplicableToHitObject>())
foreach (var obj in converted.HitObjects)
mod.ApplyToHitObject(obj);
processor?.PostProcess();
return converted;
}
public override string ToString() => BeatmapInfo.ToString();
public bool BeatmapLoaded => beatmap.IsResultAvailable;
public IBeatmap Beatmap => beatmap.Value;
protected abstract IBeatmap GetBeatmap();
private readonly RecyclableLazy<IBeatmap> beatmap;
public bool BackgroundLoaded => background.IsResultAvailable;
public Texture Background => background.Value;
protected virtual bool BackgroundStillValid(Texture b) => b == null || b.Available;
protected abstract Texture GetBackground();
private readonly RecyclableLazy<Texture> background;
public bool TrackLoaded => track.IsResultAvailable;
public Track Track => track.Value;
protected abstract Track GetTrack();
private RecyclableLazy<Track> track;
public bool WaveformLoaded => waveform.IsResultAvailable;
public Waveform Waveform => waveform.Value;
protected virtual Waveform GetWaveform() => new Waveform();
private readonly RecyclableLazy<Waveform> waveform;
public bool StoryboardLoaded => storyboard.IsResultAvailable;
public Storyboard Storyboard => storyboard.Value;
protected virtual Storyboard GetStoryboard() => new Storyboard { BeatmapInfo = BeatmapInfo };
private readonly RecyclableLazy<Storyboard> storyboard;
public bool SkinLoaded => skin.IsResultAvailable;
public Skin Skin => skin.Value;
protected virtual Skin GetSkin() => new DefaultSkin();
private readonly RecyclableLazy<Skin> skin;
/// <summary>
/// Transfer pieces of a beatmap to a new one, where possible, to save on loading.
/// </summary>
/// <param name="other">The new beatmap which is being switched to.</param>
public virtual void TransferTo(WorkingBeatmap other)
{
if (track.IsResultAvailable && Track != null && BeatmapInfo.AudioEquals(other.BeatmapInfo))
other.track = track;
}
public virtual void Dispose()
{
background.Recycle();
waveform.Recycle();
storyboard.Recycle();
skin.Recycle();
}
/// <summary>
/// Eagerly dispose of the audio track associated with this <see cref="WorkingBeatmap"/> (if any).
/// Accessing track again will load a fresh instance.
/// </summary>
public void RecycleTrack() => track.Recycle();
private void applyRateAdjustments(Track t = null)
{
if (t == null && track.IsResultAvailable) t = Track;
if (t == null) return;
t.ResetSpeedAdjustments();
foreach (var mod in Mods.Value.OfType<IApplicableToClock>())
mod.ApplyToClock(t);
}
public class RecyclableLazy<T>
{
private Lazy<T> lazy;
private readonly Func<T> valueFactory;
private readonly Func<T, bool> stillValidFunction;
private readonly object fetchLock = new object();
public RecyclableLazy(Func<T> valueFactory, Func<T, bool> stillValidFunction = null)
{
this.valueFactory = valueFactory;
this.stillValidFunction = stillValidFunction;
recreate();
}
public void Recycle()
{
if (!IsResultAvailable) return;
(lazy.Value as IDisposable)?.Dispose();
recreate();
}
public bool IsResultAvailable => stillValid;
public T Value
{
get
{
lock (fetchLock)
{
if (!stillValid)
recreate();
return lazy.Value;
}
}
}
private bool stillValid => lazy.IsValueCreated && (stillValidFunction?.Invoke(lazy.Value) ?? true);
private void recreate() => lazy = new Lazy<T>(valueFactory, LazyThreadSafetyMode.ExecutionAndPublication);
}
}
}