/// <summary>
/// 处理错误
/// </summary>
/// <param name="errorMsg">错误的函数</param>
/// <param name="ret">错误的返回值</param>
/// <param name="sessionID">sessionID</param>
/// <param name="fs">打开的文件</param>
private void HandleErrorMsg(string errorMsg, int ret, string sessionID, FileStream fs)
{
Utils.CustomPrint(errorMsg + " err,errCode=" + ((ErrorCode)ret).ToString("G"));
DllImports.QISRSessionEnd(sessionID, errorMsg);
if (fs != null)
{
fs.Close();
fs = null;
}
}
/// <summary>
/// 运行声音识别功能
/// </summary>
/// <returns></returns>
public IEnumerator RunISR()
{
///模拟录音，输入音频
if (!File.Exists(path))
{
Utils.CustomPrint("文件" + path + "不存在！");
yield break;
}
const int BUFFER_NUM = 640 * 10;/// 每次写入200ms音频(16k，16bit)：1帧音频20ms，10帧=200ms。16k采样率的16位音频，一帧的大小为640Byte
int ret = 0;
string result = "";
int len;
int audStatus = (int)AudioStatus.MSP_AUDIO_SAMPLE_CONTINUE; ///音频状态
int epStatus = (int)EpStatus.MSP_EP_NULL; ///端点检测
int recStatus = (int)RecogStatus.MSP_REC_NULL; ///识别状态
int rsltStatus = (int)RecogStatus.MSP_REC_NULL;
bool first = true;
int errcode = 0;
Utils.CustomPrint("上传语法 ...+\r\n");
string grammarID = GetGrammarID();
if (!string.IsNullOrEmpty(grammarID))
{
Utils.CustomPrint("上传语法成功\r\n");
}
else
{
Utils.CustomPrint("MSPUploadData error");
yield break;
}
IntPtr ptrSessionID = DllImports.QISRSessionBegin(grammarID, sessionISRBeginParams, out errcode);
string sessionID = Marshal.PtrToStringAnsi(ptrSessionID);
if (ErrorCode.MSP_SUCCESS != (ErrorCode)errcode)
{
Utils.CustomPrint("QISRSessionBegin err,errCode=" + ((ErrorCode)errcode).ToString("G"));
yield break;
}
FileStream fp = new FileStream(path, FileMode.Open);
byte[] buff = new byte[BUFFER_NUM];
IntPtr bp = Marshal.AllocHGlobal(BUFFER_NUM);
while (fp.Position != fp.Length)
{
len = fp.Read(buff, 0, BUFFER_NUM);
Marshal.Copy(buff, 0, bp, buff.Length);
audStatus = (int)AudioStatus.MSP_AUDIO_SAMPLE_CONTINUE;
if (first)
{
audStatus = (int)AudioStatus.MSP_AUDIO_SAMPLE_FIRST;
first = false;
}
Utils.CustomPrint(">");
///开始向服务器发送音频数据
ret = DllImports.QISRAudioWrite(sessionID, bp, (uint)len, audStatus, ref epStatus, ref recStatus);
if (ErrorCode.MSP_SUCCESS != (ErrorCode)ret)
{
HandleErrorMsg("QISRAudioWrite", ret, sessionID, fp);
yield break;
}
if (EpStatus.MSP_EP_AFTER_SPEECH == (EpStatus)epStatus)
{
break;
}
///sleep一下很有必要，防止MSC端无缓冲的识别结果时浪费CPU资源
yield return(new WaitForSeconds(0.2f));
}
buff = null;
fp.Close();
fp = null;
Marshal.FreeHGlobal(bp);
ret = DllImports.QISRAudioWrite(sessionID, IntPtr.Zero, 0, (int)AudioStatus.MSP_AUDIO_SAMPLE_LAST, ref epStatus, ref recStatus);
if (ErrorCode.MSP_SUCCESS != (ErrorCode)ret)
{
HandleErrorMsg("QISRAudioWrite", ret, sessionID, null);
yield break;
}
///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
while (RecogStatus.MSP_REC_STATUS_COMPLETE != (RecogStatus)rsltStatus)
{
IntPtr rec_result = DllImports.QISRGetResult(sessionID, ref rsltStatus, 0, out ret);
if (ErrorCode.MSP_SUCCESS != (ErrorCode)ret)
{
HandleErrorMsg("QISRGetResult", ret, sessionID, null);
yield break;
}
if (IntPtr.Zero != rec_result)
{
string tmp = Marshal.PtrToStringAnsi(rec_result);
Utils.CustomPrint("---:" + tmp);
result += tmp;
Utils.CustomPrint("传完音频后返回结果！:" + result);
}
yield return(new WaitForSeconds(0.2f));
}
ret = DllImports.QISRSessionEnd(sessionID, "Normal");
if (ErrorCode.MSP_SUCCESS != (ErrorCode)ret)
{
Utils.CustomPrint("QISRSessionEnd failed, errCode=" + ((ErrorCode)ret).ToString("G"));
}
ptrSessionID = IntPtr.Zero;
Utils.CustomPrint("识别完成\r\n");
yield break;
}