Unity/Csharp/音/変換

音からバイトへ変換

using UnityEngine;
using UnityEngine.UI;

public class SampleScene : MonoBehaviour
{
    [SerializeField]
    readonly AudioSource audioSource;
    [SerializeField]
    readonly Button button;
    // Start is called before the first frame update
    void Start()
    {
        button.onClick.AddListener(ConvertAudio);
    }
    void ConvertAudio()
    {
        // audioSource.Play();
        float[] fs = GetFloatByClip(audioSource.clip);
        byte[] bytes = ToByteArray(fs);
        foreach (byte b in bytes) {
            Debug.Log("b=" + b);
        }
        float[] floats = ToFloatArray(bytes);
        AudioClip audioClip = AudioClip.Create("NewSound", floats.Length, 1, 44100, false);
        audioClip.SetData(floats, 0);
        audioSource.clip = audioClip;
        audioSource.Play();
    }
    float[] GetFloatByClip(AudioClip clip)
    {
        float[] floatData = new float[clip.samples * clip.channels];
        clip.GetData(floatData, 0);
        return floatData;
    }
    // floatsからbytesへ
    byte[] ToByteArray(float[] floatArray)
    {
        int len = floatArray.Length * 4;
        byte[] byteArray = new byte[len];
        int pos = 0;
        foreach (float f in floatArray)
        {
            byte[] data = System.BitConverter.GetBytes(f);
            System.Array.Copy(data, 0, byteArray, pos, 4);
            pos += 4;
        }
        return byteArray;
    }
    // bytesからfloatsへ
    float[] ToFloatArray(byte[] byteArray)
    {
        int len = byteArray.Length / 4;
        float[] floatArray = new float[len];
        for (int i = 0; i < byteArray.Length; i += 4)
        {
            floatArray[i / 4] = System.BitConverter.ToSingle(byteArray, i);
        }
        return floatArray;
    }
}