mirror of
https://github.com/ppy/osu
synced 2024-12-09 08:30:36 +00:00
110 lines
2.7 KiB
C#
110 lines
2.7 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;
|
|
using osu.Framework.Allocation;
|
|
using osu.Framework.Audio.Track;
|
|
using osu.Framework.Graphics;
|
|
using osu.Framework.Threading;
|
|
|
|
namespace osu.Game.Audio
|
|
{
|
|
[LongRunningLoad]
|
|
public abstract class PreviewTrack : Component
|
|
{
|
|
/// <summary>
|
|
/// Invoked when this <see cref="PreviewTrack"/> has stopped playing.
|
|
/// Not invoked in a thread-safe context.
|
|
/// </summary>
|
|
public event Action Stopped;
|
|
|
|
/// <summary>
|
|
/// Invoked when this <see cref="PreviewTrack"/> has started playing.
|
|
/// Not invoked in a thread-safe context.
|
|
/// </summary>
|
|
public event Action Started;
|
|
|
|
protected Track Track { get; private set; }
|
|
|
|
private bool hasStarted;
|
|
|
|
[BackgroundDependencyLoader]
|
|
private void load()
|
|
{
|
|
Track = GetTrack();
|
|
if (Track != null)
|
|
Track.Completed += Stop;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Length of the track.
|
|
/// </summary>
|
|
public double Length => Track?.Length ?? 0;
|
|
|
|
/// <summary>
|
|
/// The current track time.
|
|
/// </summary>
|
|
public double CurrentTime => Track?.CurrentTime ?? 0;
|
|
|
|
/// <summary>
|
|
/// Whether the track is loaded.
|
|
/// </summary>
|
|
public bool TrackLoaded => Track?.IsLoaded ?? false;
|
|
|
|
/// <summary>
|
|
/// Whether the track is playing.
|
|
/// </summary>
|
|
public bool IsRunning => Track?.IsRunning ?? false;
|
|
|
|
private ScheduledDelegate startDelegate;
|
|
|
|
/// <summary>
|
|
/// Starts playing this <see cref="PreviewTrack"/>.
|
|
/// </summary>
|
|
/// <returns>Whether the track is started or already playing.</returns>
|
|
public bool Start()
|
|
{
|
|
if (Track == null)
|
|
return false;
|
|
|
|
startDelegate = Schedule(() =>
|
|
{
|
|
if (hasStarted)
|
|
return;
|
|
|
|
hasStarted = true;
|
|
|
|
Track.Restart();
|
|
Started?.Invoke();
|
|
});
|
|
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Stops playing this <see cref="PreviewTrack"/>.
|
|
/// </summary>
|
|
public void Stop()
|
|
{
|
|
startDelegate?.Cancel();
|
|
|
|
if (Track == null)
|
|
return;
|
|
|
|
if (!hasStarted)
|
|
return;
|
|
|
|
hasStarted = false;
|
|
|
|
Track.Stop();
|
|
|
|
Stopped?.Invoke();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Retrieves the audio track.
|
|
/// </summary>
|
|
protected abstract Track GetTrack();
|
|
}
|
|
}
|