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osu-lazer/osu.Game/Beatmaps/WorkingBeatmap.cs

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// Copyright (c) 2007-2017 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;
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using osu.Framework.Graphics.Textures;
using osu.Game.Beatmaps.Formats;
using osu.Game.Beatmaps.IO;
using osu.Game.Database;
using osu.Game.Modes;
using osu.Game.Modes.Mods;
using System;
using System.Collections.Generic;
using System.IO;
namespace osu.Game.Beatmaps
{
public abstract class WorkingBeatmap : IDisposable
{
public readonly BeatmapInfo BeatmapInfo;
public readonly BeatmapSetInfo BeatmapSetInfo;
/// <summary>
/// A play mode that is preferred for this beatmap. PlayMode will become this mode where conversion is feasible,
/// or otherwise to the beatmap's default.
/// </summary>
public PlayMode? PreferredPlayMode;
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public PlayMode PlayMode => beatmap?.BeatmapInfo?.Mode > PlayMode.Osu ? beatmap.BeatmapInfo.Mode : PreferredPlayMode ?? PlayMode.Osu;
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public readonly Bindable<IEnumerable<Mod>> Mods = new Bindable<IEnumerable<Mod>>();
public readonly bool WithStoryboard;
protected abstract ArchiveReader GetReader();
protected WorkingBeatmap(BeatmapInfo beatmapInfo, BeatmapSetInfo beatmapSetInfo, bool withStoryboard = false)
{
BeatmapInfo = beatmapInfo;
BeatmapSetInfo = beatmapSetInfo;
WithStoryboard = withStoryboard;
}
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private Texture background;
private object backgroundLock = new object();
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public Texture Background
{
get
{
lock (backgroundLock)
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{
if (background != null) return background;
if (BeatmapInfo?.Metadata?.BackgroundFile == null) return null;
try
{
using (var reader = GetReader())
background = new TextureStore(new RawTextureLoaderStore(reader), false).Get(BeatmapInfo.Metadata.BackgroundFile);
}
catch { }
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return background;
}
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}
set { lock (backgroundLock) background = value; }
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}
private Beatmap beatmap;
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private object beatmapLock = new object();
public Beatmap Beatmap
{
get
{
lock (beatmapLock)
{
if (beatmap != null) return beatmap;
try
{
using (var reader = GetReader())
{
BeatmapDecoder decoder;
using (var stream = new StreamReader(reader.GetStream(BeatmapInfo.Path)))
{
decoder = BeatmapDecoder.GetDecoder(stream);
beatmap = decoder?.Decode(stream);
}
if (WithStoryboard && beatmap != null && BeatmapSetInfo.StoryboardFile != null)
using (var stream = new StreamReader(reader.GetStream(BeatmapSetInfo.StoryboardFile)))
decoder?.Decode(stream, beatmap);
}
}
catch { }
return beatmap;
}
}
set { lock (beatmapLock) beatmap = value; }
}
private ArchiveReader trackReader;
private Track track;
private object trackLock = new object();
public Track Track
{
get
{
lock (trackLock)
{
if (track != null) return track;
try
{
//store a reference to the reader as we may continue accessing the stream in the background.
trackReader = GetReader();
var trackData = trackReader?.GetStream(BeatmapInfo.Metadata.AudioFile);
if (trackData != null)
track = new TrackBass(trackData);
}
catch { }
return track;
}
}
set { lock (trackLock) track = value; }
}
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public bool TrackLoaded => track != null;
private bool isDisposed;
protected virtual void Dispose(bool disposing)
{
if (!isDisposed)
{
track?.Dispose();
background?.Dispose();
isDisposed = true;
}
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
public void TransferTo(WorkingBeatmap working)
{
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if (track != null && BeatmapInfo.AudioEquals(working.BeatmapInfo))
working.track = track;
}
}
}