Oculus Lipsync Unity から VRM の BlendShapePreset を利用してリップシンクする。

OVRLipSyncVRMTarget.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using VRM;

public class OVRLipSyncVRMTarget : MonoBehaviour {
    public VRMBlendShapeProxy VRM;

    // smoothing amount
    [Range(1, 100)]
    [Tooltip("Smoothing of 1 will yield only the current predicted viseme, 100 will yield an extremely smooth viseme response.")]
    public int smoothAmount = 70;

    // Look for a lip-sync Context (should be set at the same level as this component)
    private OVRLipSyncContextBase lipsyncContext = null;

    private readonly static BlendShapePreset[] lipsyncClips =
    {
        BlendShapePreset.A,
        BlendShapePreset.E,
        BlendShapePreset.I,
        BlendShapePreset.O,
        BlendShapePreset.U,
    };

    // Use this for initialization
    void Start () {
        // morph target needs to be set manually; possibly other components will need the same
        if (VRM == null)
        {
            Debug.LogError("OVRLipSyncVRMTarget.Start Error: " +
                "Please set the target VRM Blend Shape Proxy to be controlled!");
            return;
        }

        // make sure there is a phoneme context assigned to this object
        lipsyncContext = GetComponent<OVRLipSyncContextBase>();
        if (lipsyncContext == null)
        {
            Debug.LogError("OVRLipSyncVRMTarget.Start Error: " +
                "No OVRLipSyncContext component on this object!");
        }
        else
        {
            // Send smoothing amount to context
            lipsyncContext.Smoothing = smoothAmount;
        }
    }

    // Update is called once per frame
    void Update () {
        if ((lipsyncContext != null) && (VRM != null))
        {
            // get the current viseme frame
            OVRLipSync.Frame frame = lipsyncContext.GetCurrentPhonemeFrame();
            if (frame != null)
            {
                SetVisemeToVRMTarget(frame);
            }

            // Update smoothing value
            if (smoothAmount != lipsyncContext.Smoothing)
            {
                lipsyncContext.Smoothing = smoothAmount;
            }
        }
    }

    /// <summary>
    /// Sets the viseme to VRM target.
    /// </summary>
    void SetVisemeToVRMTarget(OVRLipSync.Frame frame)
    {
        for (int i = 0; i < lipsyncClips.Length; i++)
        {
            VRM.SetValue(lipsyncClips[i], frame.Visemes[i + 10]);
        }
    }

}