原作者勿怪，未经允许就转载了，感谢万分。

http://www.cnblogs.com/xuguanghui/p/4505555.html

----------------------------------------------------

c#调用科大讯飞的离线语音合成，需要在科大讯飞开放平台：http://www.xfyun.cn 注册、创建应用（获取APPID）、开通离线语音服务、下载SDK。

SDK中目录如下：

关于目录结构，讯飞平台的资料库中有介绍。

 

bin目录下有msc.dll动态库。c#调用科大讯飞的语音合成，需要引用该文件。该文件是C语言生成的dll，C#没办法直接引用。所有需要用C#重新封装一个TTS.dll，然后再在C#项目中引用封装的TTS.dll。

 

步骤：

1.在VS中新建一个类库项目（TTS），新建一个类文件（TTS.cs）

2.TTS.cs中的内容如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace TTS
{
    public enum ErrorCode
    {
        MSP_SUCCESS = 0,
        MSP_ERROR_FAIL = -1,
        MSP_ERROR_EXCEPTION = -2,

        /* General errors 10100(0x2774) */
        MSP_ERROR_GENERAL = 10100,     /* 0x2774 */
        MSP_ERROR_OUT_OF_MEMORY = 10101,     /* 0x2775 */
        MSP_ERROR_FILE_NOT_FOUND = 10102,     /* 0x2776 */
        MSP_ERROR_NOT_SUPPORT = 10103,     /* 0x2777 */
        MSP_ERROR_NOT_IMPLEMENT = 10104,     /* 0x2778 */
        MSP_ERROR_ACCESS = 10105,     /* 0x2779 */
        MSP_ERROR_INVALID_PARA = 10106,     /* 0x277A */
        MSP_ERROR_INVALID_PARA_VALUE = 10107,     /* 0x277B */
        MSP_ERROR_INVALID_HANDLE = 10108,     /* 0x277C */
        MSP_ERROR_INVALID_DATA = 10109,     /* 0x277D */
        MSP_ERROR_NO_LICENSE = 10110,     /* 0x277E */
        MSP_ERROR_NOT_INIT = 10111,     /* 0x277F */
        MSP_ERROR_NULL_HANDLE = 10112,     /* 0x2780 */
        MSP_ERROR_OVERFLOW = 10113,     /* 0x2781 */
        MSP_ERROR_TIME_OUT = 10114,     /* 0x2782 */
        MSP_ERROR_OPEN_FILE = 10115,     /* 0x2783 */
        MSP_ERROR_NOT_FOUND = 10116,     /* 0x2784 */
        MSP_ERROR_NO_ENOUGH_BUFFER = 10117,     /* 0x2785 */
        MSP_ERROR_NO_DATA = 10118,     /* 0x2786 */
        MSP_ERROR_NO_MORE_DATA = 10119,     /* 0x2787 */
        MSP_ERROR_SKIPPED = 10120,     /* 0x2788 */
        MSP_ERROR_ALREADY_EXIST = 10121,     /* 0x2789 */
        MSP_ERROR_LOAD_MODULE = 10122,     /* 0x278A */
        MSP_ERROR_BUSY = 10123,     /* 0x278B */
        MSP_ERROR_INVALID_CONFIG = 10124,     /* 0x278C */
        MSP_ERROR_VERSION_CHECK = 10125,     /* 0x278D */
        MSP_ERROR_CANCELED = 10126,     /* 0x278E */
        MSP_ERROR_INVALID_MEDIA_TYPE = 10127,     /* 0x278F */
        MSP_ERROR_CONFIG_INITIALIZE = 10128,     /* 0x2790 */
        MSP_ERROR_CREATE_HANDLE = 10129,     /* 0x2791 */
        MSP_ERROR_CODING_LIB_NOT_LOAD = 10130,     /* 0x2792 */

        /* Error codes of network 10200(0x27D8)*/
        MSP_ERROR_NET_GENERAL = 10200,     /* 0x27D8 */
        MSP_ERROR_NET_OPENSOCK = 10201,     /* 0x27D9 */   /* Open socket */
        MSP_ERROR_NET_CONNECTSOCK = 10202,     /* 0x27DA */   /* Connect socket */
        MSP_ERROR_NET_ACCEPTSOCK = 10203,     /* 0x27DB */   /* Accept socket */
        MSP_ERROR_NET_SENDSOCK = 10204,     /* 0x27DC */   /* Send socket data */
        MSP_ERROR_NET_RECVSOCK = 10205,     /* 0x27DD */   /* Recv socket data */
        MSP_ERROR_NET_INVALIDSOCK = 10206,     /* 0x27DE */   /* Invalid socket handle */
        MSP_ERROR_NET_BADADDRESS = 10207,     /* 0x27EF */   /* Bad network address */
        MSP_ERROR_NET_BINDSEQUENCE = 10208,     /* 0x27E0 */   /* Bind after listen/connect */
        MSP_ERROR_NET_NOTOPENSOCK = 10209,     /* 0x27E1 */   /* Socket is not opened */
        MSP_ERROR_NET_NOTBIND = 10210,     /* 0x27E2 */   /* Socket is not bind to an address */
        MSP_ERROR_NET_NOTLISTEN = 10211,     /* 0x27E3 */   /* Socket is not listenning */
        MSP_ERROR_NET_CONNECTCLOSE = 10212,     /* 0x27E4 */   /* The other side of connection is closed */
        MSP_ERROR_NET_NOTDGRAMSOCK = 10213,     /* 0x27E5 */   /* The socket is not datagram type */

        /* Error codes of mssp message 10300(0x283C) */
        MSP_ERROR_MSG_GENERAL = 10300,     /* 0x283C */
        MSP_ERROR_MSG_PARSE_ERROR = 10301,     /* 0x283D */
        MSP_ERROR_MSG_BUILD_ERROR = 10302,     /* 0x283E */
        MSP_ERROR_MSG_PARAM_ERROR = 10303,     /* 0x283F */
        MSP_ERROR_MSG_CONTENT_EMPTY = 10304,     /* 0x2840 */
        MSP_ERROR_MSG_INVALID_CONTENT_TYPE = 10305,     /* 0x2841 */
        MSP_ERROR_MSG_INVALID_CONTENT_LENGTH = 10306,     /* 0x2842 */
        MSP_ERROR_MSG_INVALID_CONTENT_ENCODE = 10307,     /* 0x2843 */
        MSP_ERROR_MSG_INVALID_KEY = 10308,     /* 0x2844 */
        MSP_ERROR_MSG_KEY_EMPTY = 10309,     /* 0x2845 */
        MSP_ERROR_MSG_SESSION_ID_EMPTY = 10310,     /* 0x2846 */
        MSP_ERROR_MSG_LOGIN_ID_EMPTY = 10311,     /* 0x2847 */
        MSP_ERROR_MSG_SYNC_ID_EMPTY = 10312,     /* 0x2848 */
        MSP_ERROR_MSG_APP_ID_EMPTY = 10313,     /* 0x2849 */
        MSP_ERROR_MSG_EXTERN_ID_EMPTY = 10314,     /* 0x284A */
        MSP_ERROR_MSG_INVALID_CMD = 10315,     /* 0x284B */
        MSP_ERROR_MSG_INVALID_SUBJECT = 10316,     /* 0x284C */
        MSP_ERROR_MSG_INVALID_VERSION = 10317,     /* 0x284D */
        MSP_ERROR_MSG_NO_CMD = 10318,     /* 0x284E */
        MSP_ERROR_MSG_NO_SUBJECT = 10319,     /* 0x284F */
        MSP_ERROR_MSG_NO_VERSION = 10320,     /* 0x2850 */
        MSP_ERROR_MSG_MSSP_EMPTY = 10321,     /* 0x2851 */
        MSP_ERROR_MSG_NEW_RESPONSE = 10322,     /* 0x2852 */
        MSP_ERROR_MSG_NEW_CONTENT = 10323,     /* 0x2853 */
        MSP_ERROR_MSG_INVALID_SESSION_ID = 10324,     /* 0x2854 */

        /* Error codes of DataBase 10400(0x28A0)*/
        MSP_ERROR_DB_GENERAL = 10400,     /* 0x28A0 */
        MSP_ERROR_DB_EXCEPTION = 10401,     /* 0x28A1 */
        MSP_ERROR_DB_NO_RESULT = 10402,     /* 0x28A2 */
        MSP_ERROR_DB_INVALID_USER = 10403,     /* 0x28A3 */
        MSP_ERROR_DB_INVALID_PWD = 10404,     /* 0x28A4 */
        MSP_ERROR_DB_CONNECT = 10405,     /* 0x28A5 */
        MSP_ERROR_DB_INVALID_SQL = 10406,     /* 0x28A6 */
        MSP_ERROR_DB_INVALID_APPID = 10407,    /* 0x28A7 */

        /* Error codes of Resource 10500(0x2904)*/
        MSP_ERROR_RES_GENERAL = 10500,     /* 0x2904 */
        MSP_ERROR_RES_LOAD = 10501,     /* 0x2905 */   /* Load resource */
        MSP_ERROR_RES_FREE = 10502,     /* 0x2906 */   /* Free resource */
        MSP_ERROR_RES_MISSING = 10503,     /* 0x2907 */   /* Resource File Missing */
        MSP_ERROR_RES_INVALID_NAME = 10504,     /* 0x2908 */   /* Invalid resource file name */
        MSP_ERROR_RES_INVALID_ID = 10505,     /* 0x2909 */   /* Invalid resource ID */
        MSP_ERROR_RES_INVALID_IMG = 10506,     /* 0x290A */   /* Invalid resource image pointer */
        MSP_ERROR_RES_WRITE = 10507,     /* 0x290B */   /* Write read-only resource */
        MSP_ERROR_RES_LEAK = 10508,     /* 0x290C */   /* Resource leak out */
        MSP_ERROR_RES_HEAD = 10509,     /* 0x290D */   /* Resource head currupt */
        MSP_ERROR_RES_DATA = 10510,     /* 0x290E */   /* Resource data currupt */
        MSP_ERROR_RES_SKIP = 10511,     /* 0x290F */   /* Resource file skipped */

        /* Error codes of TTS 10600(0x2968)*/
        MSP_ERROR_TTS_GENERAL = 10600,     /* 0x2968 */
        MSP_ERROR_TTS_TEXTEND = 10601,     /* 0x2969 */  /* Meet text end */
        MSP_ERROR_TTS_TEXT_EMPTY = 10602,     /* 0x296A */  /* no synth text */

        /* Error codes of Recognizer 10700(0x29CC) */
        MSP_ERROR_REC_GENERAL = 10700,     /* 0x29CC */
        MSP_ERROR_REC_INACTIVE = 10701,     /* 0x29CD */
        MSP_ERROR_REC_GRAMMAR_ERROR = 10702,     /* 0x29CE */
        MSP_ERROR_REC_NO_ACTIVE_GRAMMARS = 10703,     /* 0x29CF */
        MSP_ERROR_REC_DUPLICATE_GRAMMAR = 10704,     /* 0x29D0 */
        MSP_ERROR_REC_INVALID_MEDIA_TYPE = 10705,     /* 0x29D1 */
        MSP_ERROR_REC_INVALID_LANGUAGE = 10706,     /* 0x29D2 */
        MSP_ERROR_REC_URI_NOT_FOUND = 10707,     /* 0x29D3 */
        MSP_ERROR_REC_URI_TIMEOUT = 10708,     /* 0x29D4 */
        MSP_ERROR_REC_URI_FETCH_ERROR = 10709,     /* 0x29D5 */

        /* Error codes of Speech Detector 10800(0x2A30) */
        MSP_ERROR_EP_GENERAL = 10800,     /* 0x2A30 */
        MSP_ERROR_EP_NO_SESSION_NAME = 10801,     /* 0x2A31 */
        MSP_ERROR_EP_INACTIVE = 10802,     /* 0x2A32 */
        MSP_ERROR_EP_INITIALIZED = 10803,     /* 0x2A33 */

        /* Error codes of TUV */
        MSP_ERROR_TUV_GENERAL = 10900,     /* 0x2A94 */
        MSP_ERROR_TUV_GETHIDPARAM = 10901,     /* 0x2A95 */   /* Get Busin Param huanid*/
        MSP_ERROR_TUV_TOKEN = 10902,     /* 0x2A96 */   /* Get Token */
        MSP_ERROR_TUV_CFGFILE = 10903,     /* 0x2A97 */   /* Open cfg file */
        MSP_ERROR_TUV_RECV_CONTENT = 10904,     /* 0x2A98 */   /* received content is error */
        MSP_ERROR_TUV_VERFAIL = 10905,     /* 0x2A99 */   /* Verify failure */

        /* Error codes of IMTV */
        MSP_ERROR_IMTV_SUCCESS = 11000,     /* 0x2AF8 */   /* 成功 */
        MSP_ERROR_IMTV_NO_LICENSE = 11001,     /* 0x2AF9 */   /* 试用次数结束，用户需要付费 */
        MSP_ERROR_IMTV_SESSIONID_INVALID = 11002,     /* 0x2AFA */   /* SessionId失效，需要重新登录通行证 */
        MSP_ERROR_IMTV_SESSIONID_ERROR = 11003,     /* 0x2AFB */   /* SessionId为空，或者非法 */
        MSP_ERROR_IMTV_UNLOGIN = 11004,     /* 0x2AFC */   /* 未登录通行证 */
        MSP_ERROR_IMTV_SYSTEM_ERROR = 11005,     /* 0x2AFD */   /* 系统错误 */

        /* Error codes of HCR */
        MSP_ERROR_HCR_GENERAL = 11100,
        MSP_ERROR_HCR_RESOURCE_NOT_EXIST = 11101,

        /* Error codes of http 12000(0x2EE0) */
        MSP_ERROR_HTTP_BASE = 12000,    /* 0x2EE0 */

        /*Error codes of ISV */
        MSP_ERROR_ISV_NO_USER = 13000,    /* 32C8 */    /* the user doesn't exist */
    }
    #region TTS枚举常量
    /// <summary>
    /// vol参数的枚举常量
    /// </summary>
    public enum enuVol
    {
        x_soft,
        soft,
        medium,
        loud,
        x_loud
    }

    /// <summary>
    /// speed语速参数的枚举常量
    /// </summary>
    public enum enuSpeed
    {
        x_slow,
        slow,
        medium,
        fast,
        x_fast
    }
    /// <summary>
    /// speeker朗读者枚举常量
    /// </summary>
    public enum enuSpeeker
    {
        小燕_青年女声_中英文_普通话 = 0,
        小宇_青年男声_中英文_普通话,
        凯瑟琳_青年女声_英语,
        亨利_青年男声_英语,
        玛丽_青年女声_英语,
        小研_青年女声_中英文_普通话,
        小琪_青年女声_中英文_普通话,
        小峰_青年男声_中英文_普通话,
        小梅_青年女声_中英文_粤语,
        小莉_青年女声_中英文_台普,
        小蓉_青年女声_汉语_四川话,
        小芸_青年女声_汉语_东北话,
        小坤_青年男声_汉语_河南话,
        小强_青年男声_汉语_湖南话,
        小莹_青年女声_汉语_陕西话,
        小新_童年男声_汉语_普通话,
        楠楠_童年女声_汉语_普通话,
        老孙_老年男声_汉语_普通话
    }
  
    public enum SynthStatus
    {
        MSP_TTS_FLAG_STILL_HAVE_DATA = 1,
        MSP_TTS_FLAG_DATA_END = 2,
        MSP_TTS_FLAG_CMD_CANCELED = 0
    }
    #endregion
    public class TTSDll
    {

        #region TTS dll import

        [DllImport("msc.dll", CallingConvention = CallingConvention.Winapi)]
        public static extern int MSPLogin(string user, string password, string configs);

        [DllImport("msc.dll", CallingConvention = CallingConvention.Winapi)]
        public static extern int MSPLogout();

        [DllImport("msc.dll", CallingConvention = CallingConvention.Winapi)]
        public static extern IntPtr QTTSSessionBegin(string _params, ref int errorCode);

        [DllImport("msc.dll", CallingConvention = CallingConvention.Winapi)]
        public static extern int QTTSTextPut(string sessionID, string textString, uint textLen, string _params);

        [DllImport("msc.dll", CallingConvention = CallingConvention.Winapi)]
        public static extern IntPtr QTTSAudioGet(string sessionID, ref uint audioLen, ref SynthStatus synthStatus, ref int errorCode);

        [DllImport("msc.dll", CallingConvention = CallingConvention.Winapi)]
        public static extern IntPtr QTTSAudioInfo(string sessionID);

        [DllImport("msc.dll", CallingConvention = CallingConvention.Winapi)]
        public static extern int QTTSSessionEnd(string sessionID, string hints);
        #endregion
    }
}

3.把该类库生成一个TTS.dll

4.在C#项目中引用该类库TTS.dll

5.另外需要把下载的SDK中的msc.dll放到语音合成项目中的Debug目录下面（可以百度一下C#调用C/C++的DLL）

6.语音合成项目的代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using TTS;
using System.Runtime.InteropServices;
using System.IO;
using System.Media;
using System.Threading;

namespace OfflineSpeech
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        int ret = 0;
        IntPtr session_ID;
        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                ///APPID请勿随意改动
                string login_configs = "appid =***** ";//登录参数,自己注册后获取的appid
                string text = richTextBox1.Text.Trim();//待合成的文本
                if (string.IsNullOrEmpty(richTextBox1.Text.Trim()))
                {
                    text = "请输入合成语音的内容";
                }
                
                string filename = "Call.wav"; //合成的语音文件
                uint audio_len = 0;

                SynthStatus synth_status = SynthStatus.MSP_TTS_FLAG_STILL_HAVE_DATA;
                ret = TTSDll.MSPLogin(string.Empty, string.Empty, login_configs);//第一个参数为用户名，第二个参数为密码，第三个参数是登录参数，用户名和密码需要在http://open.voicecloud.cn
                //MSPLogin方法返回失败
                if (ret !=(int) ErrorCode.MSP_SUCCESS)
                {
                    return;
                }
                //string parameter = "engine_type = local, voice_name=xiaoyan, tts_res_path =fo|res\\tts\\xiaoyan.jet;fo|res\\tts\\common.jet, sample_rate = 16000";
                string _params = "ssm=1,ent=sms16k,vcn=xiaoyan,spd=medium,aue=speex-wb;7,vol=x-loud,auf=audio/L16;rate=16000";
                //string @params = "engine_type = local,voice_name=xiaoyan,speed=50,volume=50,pitch=50,rcn=1, text_encoding = UTF8, background_sound=1,sample_rate = 16000";
                session_ID = TTSDll.QTTSSessionBegin(_params, ref ret);
                //QTTSSessionBegin方法返回失败
                if (ret != (int)ErrorCode.MSP_SUCCESS)
                {
                    return;
                }
                ret = TTSDll.QTTSTextPut(Ptr2Str(session_ID), text, (uint)Encoding.Default.GetByteCount(text), string.Empty);
                //QTTSTextPut方法返回失败
                if (ret != (int)ErrorCode.MSP_SUCCESS)
                {
                    return;
                }

                MemoryStream memoryStream = new MemoryStream();
                memoryStream.Write(new byte[44], 0, 44);
                while (true)
                {
                    IntPtr source = TTSDll.QTTSAudioGet(Ptr2Str(session_ID), ref audio_len, ref synth_status, ref ret);
                    byte[] array = new byte[(int)audio_len];
                    if (audio_len > 0)
                    {
                        Marshal.Copy(source, array, 0, (int)audio_len);
                    }
                    memoryStream.Write(array, 0, array.Length);
                    Thread.Sleep(1000);
                    if (synth_status == SynthStatus.MSP_TTS_FLAG_DATA_END || ret != 0)
                        break;
                }
                WAVE_Header wave_Header = getWave_Header((int)memoryStream.Length - 44);
                byte[] array2 = this.StructToBytes(wave_Header);
                memoryStream.Position = 0L;
                memoryStream.Write(array2, 0, array2.Length);
                memoryStream.Position = 0L;
                SoundPlayer soundPlayer = new SoundPlayer(memoryStream);
                soundPlayer.Stop();
                soundPlayer.Play();
                if (filename != null)
                {
                    FileStream fileStream = new FileStream(filename, FileMode.Create,FileAccess.Write);
                    memoryStream.WriteTo(fileStream);
                    memoryStream.Close();
                    fileStream.Close();
                }
                
            }
            catch (Exception)
            {
            }
            finally
            {
                ret = TTSDll.QTTSSessionEnd(Ptr2Str(session_ID), "");
                ret = TTSDll.MSPLogout();//退出登录
            }
        }
        /// <summary>
        /// 结构体转字符串
        /// </summary>
        /// <param name="structure"></param>
        /// <returns></returns>
        private byte[] StructToBytes(object structure)
        {
            int num = Marshal.SizeOf(structure);
            IntPtr intPtr = Marshal.AllocHGlobal(num);
            byte[] result;
            try
            {
                Marshal.StructureToPtr(structure, intPtr, false);
                byte[] array = new byte[num];
                Marshal.Copy(intPtr, array, 0, num);
                result = array;
            }
            finally
            {
                Marshal.FreeHGlobal(intPtr);
            }
            return result;
        }
        /// <summary>
        /// 结构体初始化赋值
        /// </summary>
        /// <param name="data_len"></param>
        /// <returns></returns>
        private WAVE_Header getWave_Header(int data_len)
        {
            return new WAVE_Header
            {
                RIFF_ID = 1179011410,
                File_Size = data_len + 36,
                RIFF_Type = 1163280727,
                FMT_ID = 544501094,
                FMT_Size = 16,
                FMT_Tag = 1,
                FMT_Channel = 1,
                FMT_SamplesPerSec = 16000,
                AvgBytesPerSec = 32000,
                BlockAlign = 2,
                BitsPerSample = 16,
                DATA_ID = 1635017060,
                DATA_Size = data_len
            };
        }
        /// <summary>
        /// 语音音频头
        /// </summary>
        private struct WAVE_Header
        {
            public int RIFF_ID;
            public int File_Size;
            public int RIFF_Type;
            public int FMT_ID;
            public int FMT_Size;
            public short FMT_Tag;
            public ushort FMT_Channel;
            public int FMT_SamplesPerSec;
            public int AvgBytesPerSec;
            public ushort BlockAlign;
            public ushort BitsPerSample;
            public int DATA_ID;
            public int DATA_Size;
        }
        /// 指针转字符串
        /// </summary>
        /// <param name="p">指向非托管代码字符串的指针</param>
        /// <returns>返回指针指向的字符串</returns>
        public static string Ptr2Str(IntPtr p)
        {
            List<byte> lb = new List<byte>();
            while (Marshal.ReadByte(p) != 0)
            {
                lb.Add(Marshal.ReadByte(p));
                p = p + 1;
            }
            byte[] bs = lb.ToArray();
            return Encoding.Default.GetString(lb.ToArray());
        }
    }
}

7.语音合成项目界面如下：

 

推荐科大讯飞平台论坛帖子：

http://bbs.xfyun.cn/forum.php?mod=viewthread&tid=3771

http://bbs.xfyun.cn/forum.php?mo ... &highlight=c%23

 

源码:

WindowsFormsApplication1.zip

appid  :要使用自己在科大讯飞官网创建应用后的appid