Unity+百度AI，輕鬆實現語音交互，全平臺兼容（傾力推薦，非常好用）

廢話不多說先上視頻，各位小夥伴要的是這種效果就可以繼續看下去了。

Unity語音識別

全程只有一個類，需要的親自提～

using System;
using System.Collections;
using System.Text.RegularExpressions;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.Networking;
using UnityEngine.UI;

//RequireComponent的這兩個組件主要用於播放自己錄製的聲音,不需要刻意刪除,同時注意刪除使用組件的代碼
[RequireComponent(typeof(AudioListener)), RequireComponent(typeof(AudioSource))]
public class BaiduASR : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
{
    //百度語音識別相關key
    //string appId = "";
    string apiKey = "0UGofOLwP8XOc6qSRvfQF8VG";              //填寫自己的apiKey
    string secretKey = "KQTzXjkK3ghpxYe3O3pMbLaouh1pyzZo";         //填寫自己的secretKey

    //記錄accesstoken令牌
    string accessToken = string.Empty;

    //語音識別的結果
    string asrResult = string.Empty;

    //標記是否有麥克風
    private bool isHaveMic = false;

    //當前錄音設備名稱
    string currentDeviceName = string.Empty;

    //錄音頻率,控制錄音質量(8000,16000)
    int recordFrequency = 8000;

    //上次按下時間戳
    double lastPressTimestamp = 0;

    //表示錄音的最大時長
    int recordMaxLength = 10;

    //實際錄音長度(由於unity的錄音需先指定長度,導致識別上傳時候會上傳多餘的無效字節)
    //通過該字段,獲取有效錄音長度,上傳時候剪切到無效的字節數據即可
    int trueLength = 0;

    //存儲錄音的片段
    [HideInInspector]
    public AudioClip saveAudioClip;

    //當前按鈕下的文本
    public Text textBtn;

    //顯示結果的文本
    public Text textResult;

    //音源
    AudioSource audioSource;

    void Start()
    {
        //獲取麥克風設備，判斷是否有麥克風設備
        if (Microphone.devices.Length > 0)
        {
            isHaveMic = true;
            currentDeviceName = Microphone.devices[0];
        }

        //獲取相關組件
        audioSource = this.GetComponent<AudioSource>();
    }

    /// <summary>
    /// 開始錄音
    /// </summary>
    /// <param name="isLoop"></param>
    /// <param name="lengthSec"></param>
    /// <param name="frequency"></param>
    /// <returns></returns>
    public bool StartRecording(bool isLoop = false) //8000,16000
    {
        if (isHaveMic == false || Microphone.IsRecording(currentDeviceName))
        {
            return false;
        }

        //開始錄音
        /*
         * public static AudioClip Start(string deviceName, bool loop, int lengthSec, int frequency);
         * deviceName   錄音設備名稱.
         * loop         如果達到長度,是否繼續記錄
         * lengthSec    指定錄音的長度.
         * frequency    音頻採樣率   
         */

        lastPressTimestamp = GetTimestampOfNowWithMillisecond();

        saveAudioClip = Microphone.Start(currentDeviceName, isLoop, recordMaxLength, recordFrequency);

        return true;
    }

    /// <summary>
    /// 錄音結束,返回實際的錄音時長
    /// </summary>
    /// <returns></returns>
    public int EndRecording()
    {
        if (isHaveMic == false || !Microphone.IsRecording(currentDeviceName))
        {
            return 0;
        }

        //結束錄音
        Microphone.End(currentDeviceName);

        //向上取整,避免遺漏錄音末尾
        return Mathf.CeilToInt((float)(GetTimestampOfNowWithMillisecond() - lastPressTimestamp) / 1000f);
    }

    /// <summary>
    /// 獲取毫秒級別的時間戳,用於計算按下錄音時長
    /// </summary>
    /// <returns></returns>
    public double GetTimestampOfNowWithMillisecond()
    {
        return (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000;
    }

    /// <summary>
    /// 按下錄音按鈕
    /// </summary>
    /// <param name="eventData"></param>
    public void OnPointerDown(PointerEventData eventData)
    {
        textBtn.text = "鬆開識別";
        StartRecording();
    }

    /// <summary>
    /// 放開錄音按鈕
    /// </summary>
    /// <param name="eventData"></param>
    public void OnPointerUp(PointerEventData eventData)
    {
        textBtn.text = "按住說話";
        trueLength = EndRecording();
        if (trueLength > 1)
        {
            audioSource.PlayOneShot(saveAudioClip);
            StartCoroutine(_StartBaiduYuYin());
        }
        else
        {
            textResult.text = "錄音時長過短";
        }
    }

    /// <summary>
    /// 獲取accessToken請求令牌
    /// </summary>
    /// <returns></returns>
    IEnumerator _GetAccessToken()
    {
        var uri =
            string.Format(
                "https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials&client_id={0}&client_secret={1}",
                apiKey, secretKey);
        UnityWebRequest unityWebRequest = UnityWebRequest.Get(uri);
        yield return unityWebRequest.SendWebRequest();

        if (unityWebRequest.isDone)
        {
            //這裏可以考慮用Json,本人比較懶所以用正則匹配出accessToken
            Match match = Regex.Match(unityWebRequest.downloadHandler.text, @"access_token.:.(.*?).,");
            if (match.Success)
            {
                //表示正則匹配到了accessToken
                accessToken = match.Groups[1].ToString();
            }
            else
            {
                textResult.text = "驗證錯誤,獲取AccessToken失敗!!!";
            }
        }
    }

    /// <summary>
    /// 發起語音識別請求
    /// </summary>
    /// <returns></returns>
    IEnumerator _StartBaiduYuYin()
    {
        if (string.IsNullOrEmpty(accessToken))
        {
            yield return _GetAccessToken();
        }

        asrResult = string.Empty;

        //處理當前錄音數據爲PCM16
        float[] samples = new float[recordFrequency * trueLength * saveAudioClip.channels];
        saveAudioClip.GetData(samples, 0);
        var samplesShort = new short[samples.Length];
        for (var index = 0; index < samples.Length; index++)
        {
            samplesShort[index] = (short)(samples[index] * short.MaxValue);
        }
        byte[] datas = new byte[samplesShort.Length * 2];
        Buffer.BlockCopy(samplesShort, 0, datas, 0, datas.Length);

        string url = string.Format("{0}?cuid={1}&token={2}", "https://vop.baidu.com/server_api", SystemInfo.deviceUniqueIdentifier, accessToken);

        WWWForm wwwForm = new WWWForm();
        wwwForm.AddBinaryData("audio", datas);

        UnityWebRequest unityWebRequest = UnityWebRequest.Post(url, wwwForm);

        unityWebRequest.SetRequestHeader("Content-Type", "audio/pcm;rate=" + recordFrequency);

        yield return unityWebRequest.SendWebRequest();

        if (string.IsNullOrEmpty(unityWebRequest.error))
        {
            asrResult = unityWebRequest.downloadHandler.text;
            if (Regex.IsMatch(asrResult, @"err_msg.:.success"))
            {
                Match match = Regex.Match(asrResult, "result.:..(.*?)..]");
                if (match.Success)
                {
                    asrResult = match.Groups[1].ToString();
                    if (asrResult == "幫我展開設備場景")
                        GameObject.Find("Ground Plane Stage").GetComponent<HttpGet>().buttonStation.onClick.Invoke();
                }
            }
            else
            {
                asrResult = "識別結果爲空";
            }
            textResult.text = asrResult;
        }
    }
}

需要的親自提哦～