Unity & FACEGOOD Audio2Face 通过音频驱动面部BlendShape
【摘要】 Audio2Face简介在元宇宙的热潮下，为了让AI数字人渗透到更多的领域中，FACEGOOD已经将语音驱动口型的算法技术开源，开源地址：https://github.com/FACEGOOD/FACEGOOD-Audio2Face该技术可以实时将音频数据转换为驱动数字人面部BlendShape的权重数据，不同于ARKit中的52个BlendShape，它的数量多达116个，我们可以通过对...
Audio2Face简介
在元宇宙的热潮下，为了让AI数字人渗透到更多的领域中，FACEGOOD已经将语音驱动口型的算法技术开源，开源地址：
该技术可以实时将音频数据转换为驱动数字人面部BlendShape的权重数据，不同于ARKit中的52个BlendShape，它的数量多达116个，我们可以通过对应关系得到相应的数值，对应关系如下：
| ARKit | Voice2Face | ||||
| eyeBlinkLeft | eye_blink2_l | ||||
| eyeLookDownLeft | eye_lookDown2_l | ||||
| eyeLookInLeft | eye_lookRight_l | ||||
| eyeLookOutLeft | eye_lookLeft_l | ||||
| eyeLookUpLeft | eye_lookUp_l | ||||
| eyeSquintLeft | eye_shutTight_l | ||||
| eyeWideLeft | max(eye_downLidRaise_l,eye_upLidRaise_l) | ||||
| eyeBlinkRight | eye_blink2_r | ||||
| eyeLookDownRight | eye_lookDown2_r | ||||
| eyeLookInRight | eye_lookRight_r | ||||
| eyeLookOutRight | eye_lookLeft_r | ||||
| eyeLookUpRight | eye_lookUp_r | ||||
| eyeSquintRight | eye_shutTight_r | ||||
| eyeWideRight | max(eye_downLidRaise_r,eye_upLidRaise_r) | ||||
| jawForward | jaw_thrust_c | ||||
| jawLeft | jaw_sideways_l | ||||
| jawRight | jaw_sideways_r | ||||
| jawOpen | mouth_stretch_c | ||||
| mouthClose | mouth_chew_c | ||||
| mouthFunnel | max(mouth_funnel_dl,mouth_funnel_dr,mouth_funnel_ul,mouth_funnel_ur) | ||||
| mouthPucker | max(mouth_pucker_l,mouth_pucker_r) | ||||
| mouthLeft | mouth_sideways_l | ||||
| mouthRight | mouth_sideways_r | ||||
| mouthSmileLeft | mouth_lipCornerPull_l | ||||
| mouthSmileRight | mouth_lipCornerPull_r | ||||
| mouthFrownLeft | max(mouth_lipCornerDepress_l,mouth_lipCornerDepressFix_l) | ||||
| mouthFrownRight | max(mouth_lipCornerDepress_r,mouth_lipCornerDepressFix_r) | ||||
| mouthDimpleLeft | mouth_dimple_l | ||||
| mouthDimpleRight | mouth_dimple_r | ||||
| mouthStretchLeft | mouth_lipStretch_l | ||||
| mouthStretchRight | mouth_lipStretch_r | ||||
| mouthRollLower | max(mouth_suck_dl,mouth_suck_dr) | ||||
| mouthRollUpper | max(mouth_suck_ul,mouth_suck_ur) | ||||
| mouthShrugLower | mouth_chinRaise_d | ||||
| mouthShrugUpper | mouth_chinRaise_u | ||||
| mouthPressLeft | mouth_press_l | ||||
| mouthPressRight | mouth_press_r | ||||
| mouthLowerDownLeft | mouth_lowerLipDepress_l | ||||
| mouthLowerDownRight | mouth_lowerLipDepress_r | ||||
| mouthUpperUpLeft | mouth_upperLipRaise_l | ||||
| mouthUpperUpRight | mouth_upperLipRaise_r | ||||
| browDownleft | brow_lower_l | ||||
| browDownRight | brow_lower_r | ||||
| browInnerUp | brow_raise_c | ||||
| browOuterUpLeft | brow_raise_l | ||||
| browOuterUpRight | brow_raise_r | ||||
| cheekPuff | max(cheek_puff_l,cheek_puff_r) | ||||
| cheekSquintLeft | cheek_up | ||||
| cheekSquintRight | cheek_up | ||||
| noseSneerLeft | nose_out_l | ||||
| noseSneerRight | nose_out_r | ||||
| tongueOut | |||||
生产的数据结果如下图所示，可见是116个取值范围为-1~1的小数：
这116个数值依次对应下面116个BlendShape名称：
brow_lower_l
tongue_Scale__X
tongue_Scale_Y
tongue_Scale__Y
tongue_Scale_Z
tongue_Scale__Z
nose_out_l
nose_out_r
tongue_u
tongue_u_u
brow_raise_d
cheek_suck_r
mouth_stretch_u
tongue_u_d
tooth_d_d
tongue_d
tooth_r
tooth_d_u
cheek_UP
eye_blink1_l
eye_blink1_r
eye_blink2_l
eye_blink2_r
eye_lidTight_l
eye_lidTight_r
eye_shutTight_l
eye_shutTight_r
brow_lower_r
eye_upperLidRaise_l
eye_upperLidRaise_r
eye_downLidRaise_l
eye_downLidRaise_r
jaw_sideways_l
jaw_sideways_r
jaw_thrust_c
mouth_chew_c
mouth_chinRaise_d
mouth_chinRaise_u
brow_raise_c
mouth_dimple_l
mouth_dimple_r
mouth_funnel_dl
mouth_funnel_dr
mouth_funnel_ul
mouth_funnel_ur
mouth_lipCornerDepressFix_l
mouth_lipCornerDepressFix_r
mouth_lipCornerDepress_l
mouth_lipCornerDepress_r
brow_raise_l
mouth_lipCornerPullOpen_l
mouth_lipCornerPullOpen_r
mouth_lipCornerPull_l
mouth_lipCornerPull_r
mouth_lipStretchOpen_l
mouth_lipStretchOpen_r
mouth_lipStretch_l
mouth_lipStretch_r
mouth_lowerLipDepress_l
mouth_lowerLipDepress_r
brow_raise_r
mouth_lowerLipProtrude_c
mouth_oh_c
mouth_oo_c
mouth_pressFix_c
mouth_press_l
mouth_press_r
mouth_pucker_l
mouth_pucker_r
mouth_screamFix_c
mouth_sideways_l
cheek_puff_l
mouth_sideways_r
mouth_stretch_c
mouth_suck_dl
mouth_suck_dr
mouth_suck_ul
mouth_suck_ur
mouth_upperLipRaise_l
mouth_upperLipRaise_r
nose_wrinkle_l
nose_wrinkle_r
cheek_puff_r
tooth_l
eye_lookDown1_l
eye_lookDown2_l
eye_lookLeft_l
eye_lookRight_l
eye_lookUp_l
eye_lookDown1_r
eye_lookDown2_r
eye_lookLeft_r
eye_lookRight_r
cheek_raise_l
eye_lookUp_r
tongue_Rot_1X
tongue_Rot__1X
tongue_Rot_2X
tongue_Rot__2X
tongue_Rot_3X
tongue_Rot__3X
tongue_Rot_1Y
tongue_Rot__1Y
tongue_Rot_2Y
cheek_raise_r
tongue_Rot__2Y
tongue_Rot_3Y
tongue_Rot__3Y
tongue_Rot_1Z
tongue_Rot__1Z
tongue_Rot_2Z
tongue_Rot__2Z
tongue_Rot_3Z
tongue_Rot__3Z
tongue_Scale_X
cheek_suck_l在Unity中应用
可以用过构建python服务，Unity客户端开启麦克风录制音频，将音频数据发送给python服务端，服务端转换为驱动BlendShape的权重数据后，返回给Unity客户端进行驱动。需要注意的是Unity中BlendShape的权重范围并不是[-1,1]，因此需要进行映射。
例如：
//将[-1,1]映射到[-100,100]
private float Remap(float v)
{
return v * 100f;
}下面是一段测试音频产生的bs权重数据文件，每一行包含116个权重数值，我们拿来进行测试，将其放到StreamingAssets文件夹下。
测试模型：
测试代码：
using System.IO;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class TEST : MonoBehaviour
{
private Coroutine coroutine;
private SkinnedMeshRenderer smr;
private readonly List<List<float>> valueList = new List<List<float>>();
private IEnumerator Start()
{
smr = GetComponent<SkinnedMeshRenderer>();
string path = Path.Combine(Application.streamingAssetsPath, "weight.txt");
using (StreamReader streamReader = new StreamReader(path))
{
string content;
while ((content = streamReader.ReadLine()) != null)
{
List<float> list = new List<float>();
content = content.Trim();
string[] splitArray = content.Split(' ');
for (int i = 0; i < splitArray.Length; i++)
{
float.TryParse(splitArray[i], out float result);
list.Add(result);
}
valueList.Add(list);
yield return null;
}
}
}
private IEnumerator ExecuteCoroutine()
{
for (int i = 0; i < valueList.Count; i++)
{
List<float> list = valueList[i];
smr.SetBlendShapeWeight(0, Remap(list[49])); //brow_raise_l
smr.SetBlendShapeWeight(1, Remap(list[60])); //brow_raise_r
smr.SetBlendShapeWeight(2, Remap(list[25])); //eye_shutTight_l
smr.SetBlendShapeWeight(3, Remap(list[26])); //eye_shutTight_r
smr.SetBlendShapeWeight(4, Remap(list[87])); //eye_lookRight_l
smr.SetBlendShapeWeight(5, Remap(list[86])); //eye_lookLeft_l
smr.SetBlendShapeWeight(6, Remap(list[92])); //eye_lookRight_r
smr.SetBlendShapeWeight(7, Remap(list[91])); //eye_lookLeft_r
smr.SetBlendShapeWeight(8, Remap(list[88])); //eye_lookUp_l
smr.SetBlendShapeWeight(9, Remap(list[94])); //eye_lookUp_r
smr.SetBlendShapeWeight(10, Remap(list[85])); //eye_lookDown2_l
smr.SetBlendShapeWeight(11, Remap(list[90])); //eye_lookDown2_r
smr.SetBlendShapeWeight(12, Mathf.Max(Remap(list[71]), Remap(list[82]))); //cheek_pull_l cheek_pull_r
smr.SetBlendShapeWeight(13, Remap(list[18])); //cheek_UP
smr.SetBlendShapeWeight(14, Remap(list[18])); //cheek_UP
smr.SetBlendShapeWeight(15, Remap(list[6])); //nose_out_l
smr.SetBlendShapeWeight(16, Remap(list[7])); //nose_out_r
smr.SetBlendShapeWeight(17, Remap(list[70])); //mouth_sideways_l
smr.SetBlendShapeWeight(18, Remap(list[72])); //mouth_sideways_r
smr.SetBlendShapeWeight(19, Mathf.Max(Remap(list[67]), Remap(list[68]))); //mouth_pucker_l mouth_pucker_2
smr.SetBlendShapeWeight(20, Mathf.Max(Remap(list[41]), Remap(list[42]), Remap(list[43]), Remap(list[44]))); //mouth_funnel_dl dr ul ur
smr.SetBlendShapeWeight(21, Remap(list[52])); //mouth_lipCornerPull_l
smr.SetBlendShapeWeight(22, Remap(list[53])); //mouth_lipCornerPull_r
smr.SetBlendShapeWeight(23, Mathf.Max(Remap(list[47]), Remap(list[45]))); //mouth_lipCornerDepress_l mouth_lipCornerDepressFix_l
smr.SetBlendShapeWeight(24, Mathf.Max(Remap(list[48]), Remap(list[46]))); //mouth_lipCornerDepress_r mouth_lipCornerDepressFix_r
smr.SetBlendShapeWeight(25, Remap(list[39])); //mouth_dimple_l
smr.SetBlendShapeWeight(26, Remap(list[40])); //mouth_dimple_r
smr.SetBlendShapeWeight(27, Remap(list[65])); //mouth_press_l
smr.SetBlendShapeWeight(28, Remap(list[66])); //mouth_press_r
smr.SetBlendShapeWeight(29, Remap(list[36])); //mouth_chinRaise_d
smr.SetBlendShapeWeight(30, Remap(list[37])); //mouth_chinRaise_u
smr.SetBlendShapeWeight(31, Remap(list[56])); //mouth_lipStretch_l
smr.SetBlendShapeWeight(32, Remap(list[57])); //mouth_lipStretch_r
smr.SetBlendShapeWeight(33, Remap(list[78])); //mouth_upperLipRaise_l
smr.SetBlendShapeWeight(34, Remap(list[79])); //mouth_upperLipRaise_r
smr.SetBlendShapeWeight(35, Remap(list[58])); //mouth_lowerLipDepress_l
smr.SetBlendShapeWeight(36, Remap(list[59])); //mouth_lowerLipDepress_r
smr.SetBlendShapeWeight(37, Mathf.Max(Remap(list[76]), Remap(list[77]))); //mouth_suck_ul mouth_suck_ur
smr.SetBlendShapeWeight(38, Mathf.Max(Remap(list[74]), Remap(list[75]))); //mouth_suck_dl mouth_suck_dr
smr.SetBlendShapeWeight(39, Remap(list[35])); //mouth_chew_c
smr.SetBlendShapeWeight(40, Remap(list[34])); //jaw_thrust_c
smr.SetBlendShapeWeight(41, Remap(list[73])); //mouth_stretch_c
smr.SetBlendShapeWeight(42, Remap(list[32])); //jaw_sideways_l
smr.SetBlendShapeWeight(43, Remap(list[33])); //jaw_sideways_r
smr.SetBlendShapeWeight(44, Remap(list[38])); //brow_raise_c
smr.SetBlendShapeWeight(45, Remap(list[22])); //eye_blink2_r
smr.SetBlendShapeWeight(46, Remap(list[21])); //eye_blink2_l
smr.SetBlendShapeWeight(47, Remap(list[0])); //brow_lower_l
smr.SetBlendShapeWeight(48, Remap(list[27])); //brow_lower_r
smr.SetBlendShapeWeight(49, Mathf.Max(Remap(list[31]), Remap(list[29]))); //eye_downLidRaise_r eye_upLidRaise_r
smr.SetBlendShapeWeight(50, Mathf.Max(Remap(list[30]), Remap(list[28]))); //eye_downLidRaise_l eye_upLidRaise_l
yield return new WaitForSeconds(.07f);
}
coroutine = null;
}
private float Remap(float v)
{
return v * 100f;
}
private void OnGUI()
{
GUI.enabled = coroutine == null;
if (GUILayout.Button("Begin", GUILayout.Width(200f), GUILayout.Height(50f)))
{
coroutine = StartCoroutine(ExecuteCoroutine());
}
GUI.enabled = coroutine != null;
if (GUILayout.Button("Stop", GUILayout.Width(200f), GUILayout.Height(50f)))
{
StopCoroutine(coroutine);
coroutine = null;
}
}
}
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