/// <summary>
/// 构造函数，初始化引擎，开Session
/// </summary>
/// <param name="c1">初始化引擎的参数</param>
/// <param name="c2">开session的参数</param>
public FlyIsr(string c1, string c2)
{
var ret = 0;
//引擎初始化，只需初始化一次
ret = AsrDll.MSPLogin(null, null, c1);
if (ret != 0)
{
throw new Exception("QISP初始化失败，错误代码:" + ((ErrorCode)ret).ToString("G"));
}
//第二个参数为传递的参数，使用会话模式，使用speex编解码，使用16k16bit的音频数据
//第三个参数为返回码
var param = c2;
_sessID = FlyTts.Ptr2Str(AsrDll.QISRSessionBegin(string.Empty, param, ref ret));
if (ret != 0)
{
throw new Exception("QISRSessionBegin失败，错误代码:" + ((ErrorCode)ret).ToString("G"));
}
}
private void wis_DataAvailable(object sender, WaveInEventArgs e)
{
Console.WriteLine(DateTime.Now + ":" + DateTime.Now.Millisecond);
var ret = 0;
var bp = Marshal.AllocHGlobal(e.BytesRecorded);
var status = AudioStatus.IsrAudioSampleContinue;
var epStatus = EpStatus.IsrEpNull;
var recStatus = RecogStatus.IsrRecNull;
var rsltStatus = RecogStatus.IsrRecNull;
//ep_status 端点检测（End-point detected）器所处的状态
//rec_status 识别器所处的状态
//rslt_status 识别器所处的状态
Marshal.Copy(e.Buffer, 0, bp, e.BytesRecorded);
//开始向服务器发送音频数据
ret = AsrDll.QISRAudioWrite(_sessID, bp, (uint)e.BytesRecorded, status, ref epStatus, ref recStatus);
if (ret != 0)
{
throw new Exception("QISRAudioWrite err,errCode=" + ((ErrorCode)ret).ToString("G"));
}
//服务器返回部分结果
if (recStatus == RecogStatus.IsrRecStatusSuccess)
{
var p = AsrDll.QISRGetResult(_sessID, ref rsltStatus, 0, ref ret);
if (p != IntPtr.Zero)
{
var tmp = FlyTts.Ptr2Str(p);
DataArrived?.Invoke(this, new DataArrivedEventArgs(tmp)); //激发识别数据到达事件
Console.WriteLine(@"服务器返回部分结果！-->" + tmp);
}
}
Thread.Sleep(500);
Marshal.FreeHGlobal(bp);
//System.Console.WriteLine(System.DateTime.Now + ":" + System.DateTime.Now.Millisecond);
}
/// <summary>
/// 进行声音识别
/// </summary>
/// <param name="inFile">音频文件，pcm无文件头，采样率16k，数据16位，单声道</param>
/// <param name="outFile">输出识别结果到文件</param>
public void Audio2Txt(string inFile, string outFile = null)
{
var ret = 0;
var result = "";
try
{
//模拟录音，输入音频
if (!File.Exists(inFile))
{
throw new Exception("文件" + inFile + "不存在！");
}
if (inFile.Substring(inFile.Length - 3, 3).ToUpper() != "WAV" && inFile.Substring(inFile.Length - 3, 3).ToUpper() != "PCM")
{
throw new Exception("音频文件格式不对！");
}
var fp = new FileStream(inFile, FileMode.Open);
if (inFile.Substring(inFile.Length - 3, 3).ToUpper() == "WAV")
{
fp.Position = 44;
}
var buff = new byte[BufferNum];
var bp = Marshal.AllocHGlobal(BufferNum);
int len;
var status = AudioStatus.IsrAudioSampleContinue;
var epStatus = EpStatus.IsrEpNull;
var recStatus = RecogStatus.IsrRecNull;
var rsltStatus = RecogStatus.IsrRecNull;
//ep_status 端点检测（End-point detected）器所处的状态
//rec_status 识别器所处的状态
//rslt_status 识别器所处的状态
while (fp.Position != fp.Length)
{
len = fp.Read(buff, 0, BufferNum);
Marshal.Copy(buff, 0, bp, buff.Length);
//开始向服务器发送音频数据
ret = AsrDll.QISRAudioWrite(_sessID, bp, (uint)len, status, ref epStatus, ref recStatus);
if (ret != 0)
{
fp.Close();
throw new Exception("QISRAudioWrite err,errCode=" + ((ErrorCode)ret).ToString("G"));
}
//服务器返回部分结果
if (recStatus == RecogStatus.IsrRecStatusSuccess)
{
var p = AsrDll.QISRGetResult(_sessID, ref rsltStatus, WaitTime, ref ret);
if (p != IntPtr.Zero)
{
var tmp = FlyTts.Ptr2Str(p);
DataArrived?.Invoke(this, new DataArrivedEventArgs(tmp));
result += tmp;
Console.WriteLine(@"返回部分结果！:" + tmp);
}
}
Thread.Sleep(500);
}
fp.Close();
//最后一块数据
status = AudioStatus.IsrAudioSampleLast;
ret = AsrDll.QISRAudioWrite(_sessID, bp, 1, status, ref epStatus, ref recStatus);
if (ret != 0)
{
throw new Exception("QISRAudioWrite write last audio err,errCode=" + ((ErrorCode)ret).ToString("G"));
}
Marshal.FreeHGlobal(bp);
var loopCount = 0;
//最后一块数据发完之后，循环从服务器端获取结果
//考虑到网络环境不好的情况下，需要对循环次数作限定
do
{
var p = AsrDll.QISRGetResult(_sessID, ref rsltStatus, WaitTime, ref ret);
if (p != IntPtr.Zero)
{
var tmp = FlyTts.Ptr2Str(p);
DataArrived?.Invoke(this, new DataArrivedEventArgs(tmp)); //激发识别数据到达事件
result += tmp;
Console.WriteLine(@"传完音频后返回结果！:" + tmp);
}
if (ret != 0)
{
throw new Exception("QISRGetResult err,errCode=" + ((ErrorCode)ret).ToString("G"));
}
Thread.Sleep(200);
} while (rsltStatus != RecogStatus.IsrRecStatusSpeechComplete && loopCount++ < 30);
if (outFile != null)
{
var fout = new FileStream(outFile, FileMode.OpenOrCreate);
fout.Write(Encoding.Default.GetBytes(result), 0, Encoding.Default.GetByteCount(result));
fout.Close();
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
ret = AsrDll.QISRSessionEnd(_sessID, string.Empty);
ret = AsrDll.MSPLogout();
IsrEnd?.Invoke(this, new EventArgs()); //通知识别结束
}
}
