【Unity】Live2DCubismでシンプルなリップシンク

CubismSimpleLipSync.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Live2D.Cubism.Framework.MouthMovement;

[RequireComponent(typeof(CubismMouthController))]
public class CubismSimpleLipSync : MonoBehaviour {
	[SerializeField]
	CubismMouthController mouthController;

	[SerializeField]
	SimpleMicrophone mic;	

	public float minVolume = 0.05f;
	public float maxVolume = 0.2f;

	public float fps = 30f;

	float[] volumes = new float[50];

	// Use this for initialization
	void Start () {
		if(mouthController == null)
			mouthController = GetComponent<CubismMouthController>();

		StartCoroutine(ControlMouth());
	}
	
	// Update is called once per frame
	void Update () {
		for(int i = 0;i < 49;i++)
		{
			volumes[50 - 1 - i] = volumes[50 - 2 - i];
		}
		volumes[0] = mic.GetVolume();
	}

	IEnumerator ControlMouth()
	{
		while(true)
		{
			float open;
			//	open = (mic.GetVolume() >= minVolume) ? mic.GetVolume() / maxVolume : 0f;
			open = (GetVolumeAverage(1f / fps) >= minVolume) ? GetVolumeAverage(1f/ fps) / maxVolume : 0f;
			if(open >= 1f) open = 1f;
			if(mouthController != null) mouthController.MouthOpening = open;
			yield return new WaitForSeconds(1f / fps);
		}
	}

	float GetVolumeAverage(float time)
	{
		int frame = (int)(1f / Time.deltaTime * time);
		float vol = 0;
		for(int i = 0; i < frame; i++)
		{
			vol += volumes[i];
		}
		vol = vol / frame;
		return vol;
	}
}

SimpleMicrophone.cs

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(AudioSource))]
public class SimpleMicrophone : MonoBehaviour {
	AudioSource audio;

	float volume = 0f;
    void Start() {
        audio = GetComponent<AudioSource>();
        audio.clip = Microphone.Start(null, true, 999, 44100);  
		audio.loop = true;                                      
		audio.mute = false;  //trueにすると音量が取得できない場合があるので，AudioMixerで調節する                                 
		while (!(Microphone.GetPosition("") > 0)){}       
		audio.Play();  
    }

	void Update()
	{
		volume = GetAveragedVolume();
		//Debug.Log(volume.ToString());    
	}

	float GetAveragedVolume()
	{ 
		float[] data = new float[256];
		float a = 0;
		audio.GetOutputData(data,0);
		foreach(float s in data)
		{
			a += Mathf.Abs(s);
		}
		return a/256.0f;
	}

	public float GetVolume()
	{
		return volume;
	}
}