public static void Stop(SpeechHelper.SpeechToTextCallbackDelegate del)
{
// trace the operation
TraceHelper.AddMessage("Stopping Speech");
// save the delegate passed in
speechToTextDelegate = del;
// stop recording and start recognizing
_recognizer.stopRecording();
// update the speech state
speechStateDelegate.DynamicInvoke(SpeechHelper.SpeechState.Recognizing, "Stopped recording");
}
public static void Stop(SpeechHelper.SpeechToTextCallbackDelegate del)
{
// get the last chunk of speech
int len = mic.GetData(speechBuffer);
// stop listening
mic.Stop();
// remove the mic eventhandler
mic.BufferReady -= MicBufferReady;
initializedBufferReadyEvent = false;
// trace the operation
TraceHelper.AddMessage(String.Format("Final Frame: {0} bytes of speech", len));
// create a properly sized copy of the last buffer
byte[] speechChunk = new byte[len];
Array.Copy(speechBuffer, speechChunk, len);
// add the last speech buffer to the folder
speechBufferList.Add(speechChunk);
// if the encode flag is set, encode the chunk before sending it
if (encode)
{
// do this on a background thread because it is CPU-intensive
ThreadPool.QueueUserWorkItem(delegate
{
// create a new mutex object for this frame
AutoResetEvent bufferMutex = new AutoResetEvent(false);
bufferMutexList.Add(bufferMutex);
// encode the frame
TraceHelper.AddMessage(String.Format("Final Frame: About to encode speech"));
byte[] encodedBuf = EncodeSpeech(speechChunk, speechChunk.Length);
TraceHelper.AddMessage(String.Format("Final Frame: Encoded down to {0} bytes", encodedBuf.Length));
// wait until the previous frame has been sent
int frameIndex = bufferMutexList.Count - 1;
if (frameIndex > 0)
{
bufferMutexList[frameIndex - 1].WaitOne();
}
// send the last frame and retrieve the response
TraceHelper.AddMessage(String.Format("Sending Final Frame: {0} bytes", encodedBuf.Length));
NetworkHelper.EndSpeech(encodedBuf, encodedBuf.Length, del, new NetworkDelegate(NetworkCallback));
// repeat the sentence back to the user
PlaybackSpeech();
});
}
else
{
// send the operation immediately
TraceHelper.AddMessage(String.Format("Sending Final Frame: {0} bytes", speechChunk.Length));
NetworkHelper.EndSpeech(speechChunk, speechChunk.Length, del, new NetworkDelegate(NetworkCallback));
// play back the speech immediately
PlaybackSpeech();
}
}