/**
*
* recognize by wav audio buffer(RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 8000 Hz)
*
* @param wavAudioBuffer query audio buffer
* @param wavAudioBufferLen the length of wavAudioBuffer
*
* @return result
*
**/
public string Recognize(byte[] pcmAudioBuffer, int pcmAudioBufferLen)
{
byte[] fp = null;
try {
fp = ACRCloudFingerprintTool.CreateFingerprint(pcmAudioBuffer, pcmAudioBufferLen);
}catch (Exception e) {
return(ACRCloudErrorInfo.getJsonInfo(ACRCloudErrorInfo.GEN_FP_ERROR, e.ToString()));
}
if (fp == null)
{
return(null);
}
return(this.DoRecognize(fp));
}
/**
*
* ACRCloud Worker main function.
*
* Every (mRecognizeInterval) seconds recognize ACRCloud Server by audio buffer.
* If has result and callback OnResult.
*
**/
private void Run()
{
if (this.mRecorder == null || this.mListener == null)
{
return;
}
this.mIsRunning = true;
string result = "";
int retryNum = this.mHttpErrorRetryNum;
int nextRecognizeTime = 3; // seconds
int preRecorderAudioLen = 0;
int recordRetryNum = 10;
while (this.mIsRunning)
{
Thread.Sleep(100);
byte[] pcmData = null;
int nowRecordAudioLen = this.mRecorder.GetAudioDataLen();
if ((!this.mIsStopRecord) && nowRecordAudioLen == preRecorderAudioLen) // check microphone is OK
{
recordRetryNum--;
if (recordRetryNum <= 0)
{
if (result == "")
{
result = ACRCloudErrorInfo.getJsonInfo(ACRCloudErrorInfo.RECORD_ERROR, "record error");
}
if (result == null) // mute audio and create fingerprint null
{
result = ACRCloudErrorInfo.getJsonInfo(ACRCloudErrorInfo.NO_RESULT, "No Result");
}
break;
}
continue;
}
preRecorderAudioLen = nowRecordAudioLen;
recordRetryNum = 10;
if (this.mIsStopRecord || this.mRecorder.GetAudioDataLen() >= nextRecognizeTime * 2 * 8000)
{
pcmData = this.mRecorder.GetAudioData();
if (pcmData == null)
{
result = ACRCloudErrorInfo.getJsonInfo(ACRCloudErrorInfo.RECORD_ERROR, "record error");
break;
}
result = this.DoRecognize(pcmData);
Debug.LogError(result);
if (result == "")
{
retryNum--;
result = ACRCloudErrorInfo.getJsonInfo(ACRCloudErrorInfo.HTTP_ERROR, "http error");
if (retryNum <= 0)
{
break;
}
continue;
}
retryNum = this.mHttpErrorRetryNum;
if (result != null)
{
try {
JsonData rTmp = JsonMapper.ToObject(result);
if ((int)rTmp ["status"] ["code"] == 1001) // no result
{
if (nextRecognizeTime >= this.mMaxRecognizeAudioTime)
{
break;
}
}
else
{
break;
}
} catch (Exception e) {
result = ACRCloudErrorInfo.getJsonInfo(ACRCloudErrorInfo.JSON_ERROR, "json error (" + result + ")");
break;
}
}
if (this.mIsStopRecord)
{
if (result == null)
{
result = ACRCloudErrorInfo.getJsonInfo(ACRCloudErrorInfo.NO_RESULT, "No Result");
}
break;
}
nextRecognizeTime = pcmData.Length / (2 * 8000) + this.mRecognizeInterval;
if (nextRecognizeTime > this.mMaxRecognizeAudioTime)
{
nextRecognizeTime = this.mMaxRecognizeAudioTime;
}
}
}
if (this.mIsRunning)
{
this.mListener.OnResult(result);
}
this.mIsRunning = false;
}