AudioSource.PlayScheduled

パラメーター

説明

絶対タイムライン上から AudioSettings.dspTime が読み取った特定の時間に clip を再生します。

これは音楽プレーヤーで推奨される AudioClips を縫い合わせる方法であり、フレームレートには関係なく、サウンドの再生を準備するのためにオープンしたりバッファリング (ストリーム) するのに多くの時間がかかるメディアから CPU がスパイクを起こさずに取得するようにオーディオシステムに十分な時間を与えます。

// Basic demonstration of a music system that uses PlayScheduled to preload and sample-accurately stitch two AudioClips in an alternating fashion.
// The code assumes that the music pieces are each 16 bars (4 beats / bar) at a tempo of 140 beats per minute.
// To make it stitch arbitrary clips just replace the line
//   nextEventTime += (60.0 / bpm) * numBeatsPerSegment 
// by
//   nextEventTime += clips[flip].length;

@script RequireComponent(AudioSource)

public var bpm = 140.0;
public var numBeatsPerSegment = 16;
public var clips = new AudioClip[2];

private var nextEventTime:double;
private var flip = 0;
private var audioSources = new AudioSource[2];
private var running = false;

function Start()
{
	for(var i = 0; i < 2; i++)
	{
		var child:GameObject = new GameObject("Player");
		child.transform.parent = gameObject.transform;
		audioSources[i] = child.AddComponent.<AudioSource>();
	}
	nextEventTime = AudioSettings.dspTime + 2.0;
	running = true;
}

function Update()
{
	if(!running)
		return;
	var time = AudioSettings.dspTime;
	if(time + 1.0 > nextEventTime)
	{
		// We are now approx. 1 second before the time at which the sound should play, so we will schedule it now in order for the system to have enough time
		// to prepare the playback at the specified time. This may involve opening buffering a streamed file and should therefore take any worst-case delay into account.
		audioSources[flip].clip = clips[flip];
		audioSources[flip].PlayScheduled(nextEventTime);
		Debug.Log("Scheduled source " + flip + " to start at time " + nextEventTime);

		// Place the next event 16 beats from here at a rate of 140 beats per minute
		nextEventTime += (60.0 / bpm) * numBeatsPerSegment;

		// Flip between two audio sources so that the loading process of one does not interfere with the one that's playing out
		flip = 1 - flip;
	}
}

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(AudioSource))]
public class ExampleClass : MonoBehaviour {
    public float bpm = 140.0F;
    public int numBeatsPerSegment = 16;
    public AudioClip[] clips = new AudioClip[2];
    private double nextEventTime;
    private int flip = 0;
    private AudioSource[] audioSources = new AudioSource[2];
    private bool running = false;
    void Start() {
        int i = 0;
        while (i < 2) {
            GameObject child = new GameObject("Player");
            child.transform.parent = gameObject.transform;
            audioSources[i] = child.AddComponent<AudioSource>();
            i++;
        }
        nextEventTime = AudioSettings.dspTime + 2.0F;
        running = true;
    }
    void Update() {
        if (!running)
            return;
        
        double time = AudioSettings.dspTime;
        if (time + 1.0F > nextEventTime) {
            audioSources[flip].clip = clips[flip];
            audioSources[flip].PlayScheduled(nextEventTime);
            Debug.Log("Scheduled source " + flip + " to start at time " + nextEventTime);
            nextEventTime += 60.0F / bpm * numBeatsPerSegment;
            flip = 1 - flip;
        }
    }
}

AudioSource.SetScheduledEndTime の例はクリップの間をポップやクリックすることなくふたつのオーディオクリップを再生する方法を示しています。アプローチはクリップをアタッチされているふたつの AudioSources を持つことと、その AudioSource を使用してそれぞれのクリップをキューすることです。

See Also: SetScheduledStartTime.