百度语音识别

using System.Collections;
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using LitJson;
using System.Text;

public class BaiduYY : MonoBehaviour {
private string token; //access_token
private string cuid = "9963623"; //百度App ID
private string format = "wav"; //语音格式
private int rate = 8000; //采样率
private int channel = 1; //声道数
private string speech; //语音数据，进行base64编码
private int len; //原始语音长度
private string lan = "zh"; //语种

private string grant_Type = "client_credentials"; //授权类型
private string client_ID = "yOoLpRwnLYslpFcOxmPsQHcy";                       //百度appkey
private string client_Secret = "3e0980100dafbb8cbb88d74353654911";           //百度Secret Key

private string baiduAPI = "http://vop.baidu.com/server_api";
private string getTokenAPIPath = "https://openapi.baidu.com/oauth/2.0/token";

private Byte[] clipByte;

public Button start;
public Button end;
public Button quit;
public Text debugText;

/// <summary>
/// 语音转换出来的文字
/// </summary>
public static string audioToString;

private AudioSource aud;
private int audioLength;//录音的长度

private void Awake()
{
    if (GetComponent<AudioSource>() == null)
        aud = gameObject.AddComponent<AudioSource>();
    else
        aud = gameObject.GetComponent<AudioSource>();
    aud.playOnAwake = false;
}

void Update () {

    debugText.text = audioToString;

}
/// <summary>
/// 获取百度用户令牌
/// </summary>
/// <param name="url">获取的url</param>
/// <returns></returns>
private IEnumerator GetToken(string url)
{
    WWWForm getTForm = new WWWForm();
    getTForm.AddField("grant_type", grant_Type);
    getTForm.AddField("client_id", client_ID);
    getTForm.AddField("client_secret", client_Secret);

    WWW getTW = new WWW(url, getTForm);
    yield return getTW;
    if (getTW.isDone)
    {
        if (getTW.error == null)
        {
            token = JsonMapper.ToObject(getTW.text)["access_token"].ToString();
            StartCoroutine(GetAudioString(baiduAPI));
        }
        else
            Debug.LogError(getTW.error);
    }
}


/// <summary>
/// 开始录音
/// </summary>
public void StartMic()
{
    if (Microphone.devices.Length == 0) return;
    Microphone.End(null);
    Debug.Log("Start");
    aud.clip = Microphone.Start(null, false, 10, rate);
}
/// <summary>
/// 结束录音
/// </summary>
public void EndMic()
{
    int lastPos = Microphone.GetPosition(null);
    if (Microphone.IsRecording(null))
        audioLength = lastPos / rate;//录音时长  
    else
        audioLength = 10;
    Debug.Log("Stop");
    Microphone.End(null);

    clipByte = GetClipData();
    len = clipByte.Length;
    speech = Convert.ToBase64String(clipByte);
    StartCoroutine(GetToken(getTokenAPIPath));
    Debug.Log(len);
    Debug.Log(audioLength);
}

/// <summary>
/// 把录音转换为Byte[]
/// </summary>
/// <returns></returns>
public Byte[] GetClipData()
{
    if (aud.clip == null)
    {
        Debug.LogError("录音数据为空");
        return null;
    }

    float[] samples = new float[aud.clip.samples];

    aud.clip.GetData(samples, 0);


    Byte[] outData = new byte[samples.Length * 2];

    int rescaleFactor = 32767; //to convert float to Int16   

    for (int i = 0; i < samples.Length; i++)
    {
        short temshort = (short)(samples[i] * rescaleFactor);

        Byte[] temdata = System.BitConverter.GetBytes(temshort);

        outData[i * 2] = temdata[0];
        outData[i * 2 + 1] = temdata[1];
    }
    if (outData == null || outData.Length <= 0)
    {
        Debug.LogError("录音数据为空");
        return null;
    }

    //return SubByte(outData, 0, audioLength * 8000 * 2);
    return outData;
}

/// <summary>
/// 把语音转换为文字
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
private IEnumerator GetAudioString(string url)
{
    JsonWriter jw = new JsonWriter();
    jw.WriteObjectStart();
    jw.WritePropertyName("format");
    jw.Write(format);
    jw.WritePropertyName("rate");
    jw.Write(rate);
    jw.WritePropertyName("channel");
    jw.Write(channel);
    jw.WritePropertyName("token");
    jw.Write(token);
    jw.WritePropertyName("cuid");
    jw.Write(cuid);
    jw.WritePropertyName("len");
    jw.Write(len);
    jw.WritePropertyName("speech");
    jw.Write(speech);
    jw.WriteObjectEnd();
    WWWForm w = new WWWForm();


    WWW getASW = new WWW(url, Encoding.Default.GetBytes(jw.ToString()));
    yield return getASW;
    if (getASW.isDone)
    {
        if (getASW.error == null)
        {
            JsonData getASWJson = JsonMapper.ToObject(getASW.text);
            if (getASWJson["err_msg"].ToString() == "success.")
            {
                audioToString = getASWJson["result"][0].ToString();
                if (audioToString.Substring(audioToString.Length - 1) == "，")
                    audioToString = audioToString.Substring(0, audioToString.Length - 1);
                Debug.Log(audioToString);
            }
        }
        else
        {
            Debug.LogError(getASW.error);
        }
    }
}
public void QuitGame()
{
    Application.Quit();
}

}

//////////////////////////
using UnityEngine;
using UnityEngine.EventSystems;
using System.Collections;
/// <summary>
/// 脚本位置：UGUI按钮组件身上
/// 脚本功能：实现按钮长按状态的判断
/// 创建时间：2017
/// </summary>

// 继承：按下，抬起和离开的三个接口
//鼠标按下开始录音，抬起，结束录音，并且百度语音识别
public class OnButtonPressed : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
{
// 延迟时间
private float delay = 0.2f;

// 按钮是否是按下状态  
private bool isDown = false;

// 按钮最后一次是被按住状态时候的时间  
private float lastIsDownTime;


void Update()
{
    // 如果按钮是被按下状态  
    if (isDown)
    {
        // 当前时间 -  按钮最后一次被按下的时间 > 延迟时间0.2秒  
        if (Time.time - lastIsDownTime > delay)
        {
            // 触发长按方法  
            Debug.Log("长按");
            // 记录按钮最后一次被按下的时间  
            lastIsDownTime = Time.time;
        }
    }
}

// 当按钮被按下后系统自动调用此方法  
public void OnPointerDown(PointerEventData eventData)
{
    isDown = true;
    lastIsDownTime = Time.time;
    BaiduYY._instanve.StartMic();
}

// 当按钮抬起的时候自动调用此方法  
public void OnPointerUp(PointerEventData eventData)
{
    isDown = false;
    BaiduYY._instanve.EndMic();
}

// 当鼠标从按钮上离开的时候自动调用此方法  
public void OnPointerExit(PointerEventData eventData)
{
    isDown = false;
}

}