AudioClip.GetData

説明

クリップからサンプルデータの配列を取得します。

The samples are floats ranging from -1.0f to 1.0f. The sample count is determined by the length of the float array. Use the offsetSamples parameter to start the read from a specific position in the clip. If the read length from the offset is longer than the clip length, the read will wrap around and read the remaining samples from the start of the clip.

圧縮されたオーディオファイル、オーディオインポーターで Load Type が Decompress on Load に設定されているときサンプルデータを引き出すのみしかできないことに注意してください。もしこれがそうでない場合、配列はすべてのサンプル値を 0 として返すことになります。

using UnityEngine;

public class Example : MonoBehaviour
{
    // Read all the samples from the clip, reducing their gain by half
    // as we go along.

    void Start()
    {
        AudioSource audioSource = GetComponent<AudioSource>();
        float[] samples = new float[audioSource.clip.samples * audioSource.clip.channels];
        audioSource.clip.GetData(samples, 0);

        for (int i = 0; i < samples.Length; ++i)
        {
            samples[i] = samples[i] * 0.5f;
        }

        audioSource.clip.SetData(samples, 0);
    }
}

WebGL: The sample data of audio clips is loaded asynchronously in the WebGL platform. This makes it necessary to check the loadState of an AudioClip before reading the sample data.

using UnityEngine;
using UnityEngine.Audio;
using System.Collections;

public class ExampleGetDataCoroutine : MonoBehaviour
{
    void Start()
    {
        StartCoroutine(GetAudioData());
    }

    IEnumerator GetAudioData()
    {
        AudioSource audioSource = GetComponent<AudioSource>();
        // Wait for sample data to be loaded
        while (audioSource.clip.loadState != AudioDataLoadState.Loaded)
        {
            yield return null;
        }

        // Read all the samples from the clip, reducing their gain by half
        // as we go along.
        float[] samples = new float[audioSource.clip.samples * audioSource.clip.channels];
        audioSource.clip.GetData(samples, 0);

        for (int i = 0; i < samples.Length; ++i)
        {
            samples[i] = samples[i] * 0.5f;
        }

        audioSource.clip.SetData(samples, 0);
    }
}