void Flow_StateChanged(object sender, MediaFlowStateChangedEventArgs e)
{
Log("ControlAVCall Flow_StateChanged PreviousState=" + e.PreviousState + " State=" + e.State);
AudioVideoFlow avFlow = (AudioVideoFlow)sender;
if (avFlow.State == MediaFlowState.Active)
{
SpeechRecognitionConnector speechRecognitionConnector = new SpeechRecognitionConnector();
speechRecognitionConnector.AttachFlow(avFlow);
SpeechRecognitionStream stream = speechRecognitionConnector.Start();
_speechRecognitionEngine = new SpeechRecognitionEngine();
_speechRecognitionEngine.SpeechRecognized += new EventHandler <SpeechRecognizedEventArgs>(_speechRecognitionEngine_SpeechRecognized);
_speechRecognitionEngine.LoadGrammarCompleted += new EventHandler <LoadGrammarCompletedEventArgs>(_speechRecognitionEngine_LoadGrammarCompleted);
Choices pathChoice = new Choices(new string[] { "previous", "next" });
Grammar gr = new Grammar(new GrammarBuilder(pathChoice));
_speechRecognitionEngine.LoadGrammarAsync(gr);
SpeechAudioFormatInfo speechAudioFormatInfo = new SpeechAudioFormatInfo(8000, AudioBitsPerSample.Sixteen, Microsoft.Speech.AudioFormat.AudioChannel.Mono);
_speechRecognitionEngine.SetInputToAudioStream(stream, speechAudioFormatInfo);
_speechRecognitionEngine.RecognizeAsync(RecognizeMode.Multiple);
}
else
{
if (avFlow.SpeechRecognitionConnector != null)
{
avFlow.SpeechRecognitionConnector.DetachFlow();
}
}
}
public void Run()
{
// A helper class to take care of platform and endpoint setup and cleanup.
_helper = new UCMASampleHelper();
// Create a user endpoint using the network credential object.
_userEndpoint = _helper.CreateEstablishedUserEndpoint("Broadcast User");
// Register a delegate to be called when an incoming audio-video call arrives.
_userEndpoint.RegisterForIncomingCall <AudioVideoCall>(AudioVideoCall_Received);
// Wait for the incoming call to be accepted.
Console.WriteLine("Waiting for incoming call...");
_waitForCallToBeAccepted.WaitOne();
// Create a speech recognition connector and attach an AudioVideoFlow to it.
SpeechRecognitionConnector speechRecognitionConnector = new SpeechRecognitionConnector();
speechRecognitionConnector.AttachFlow(_audioVideoFlow);
// Start the speech recognition connector.
SpeechRecognitionStream stream = speechRecognitionConnector.Start();
// Create a speech recognition engine.
SpeechRecognitionEngine speechRecognitionEngine = new SpeechRecognitionEngine();
speechRecognitionEngine.SpeechRecognized += new EventHandler <SpeechRecognizedEventArgs>(SpeechRecognitionEngine_SpeechRecognized);
//Add a grammar.
string[] recoString = { "buy", "sell", "Fabrikam", "Contoso", "maximum", "minimum", "one", "ten", "twenty", "send" };
Choices choices = new Choices(recoString);
speechRecognitionEngine.LoadGrammar(new Grammar(new GrammarBuilder(choices)));
//Attach to audio stream to the SR engine.
SpeechAudioFormatInfo speechAudioFormatInfo = new SpeechAudioFormatInfo(8000, AudioBitsPerSample.Sixteen, Microsoft.Speech.AudioFormat.AudioChannel.Mono);
speechRecognitionEngine.SetInputToAudioStream(stream, speechAudioFormatInfo);
Console.WriteLine("\r\nGrammar loaded, say send to send IM.");
//Prepare the SR engine to perform multiple asynchronous recognitions.
speechRecognitionEngine.RecognizeAsync(RecognizeMode.Multiple);
//Pause the main thread until recognition completes.
_waitForConnectorToStop.WaitOne();
speechRecognitionConnector.Stop();
Console.WriteLine("connector stopped");
// Detach the flow from the speech recognition connector, to prevent the flow from being kept in memory.
speechRecognitionConnector.DetachFlow();
// Terminate the call, the conversation, and then unregister the
// endpoint from receiving an incoming call.
_audioVideoCall.BeginTerminate(CallTerminateCB, _audioVideoCall);
_waitForConversationToBeTerminated.WaitOne();
// Shut down the platform.
_helper.ShutdownPlatform();
}
public void Run()
{
// Create AudioVideoFlow
AudioVideoFlowHelper audioVideoFlowHelper = new AudioVideoFlowHelper();
_audioVideoFlow = audioVideoFlowHelper.CreateAudioVideoFlow(
null,
audioVideoFlow_StateChanged);
// Create a speech recognition connector and attach it to a AudioVideoFlow
SpeechRecognitionConnector speechRecognitionConnector = new SpeechRecognitionConnector();
speechRecognitionConnector.AttachFlow(_audioVideoFlow);
//Start recognizing
SpeechRecognitionStream stream = speechRecognitionConnector.Start();
// Create speech recognition engine and start recognizing by attaching connector to engine
SpeechRecognitionEngine speechRecognitionEngine = new SpeechRecognitionEngine();
speechRecognitionEngine.SpeechRecognized += new EventHandler <SpeechRecognizedEventArgs>(speechRecognitionEngine_SpeechRecognized);
string[] recognizedString = { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "exit" };
Choices numberChoices = new Choices(recognizedString);
speechRecognitionEngine.LoadGrammar(new Grammar(new GrammarBuilder(numberChoices)));
SpeechAudioFormatInfo speechAudioFormatInfo = new SpeechAudioFormatInfo(8000, AudioBitsPerSample.Sixteen, Microsoft.Speech.AudioFormat.AudioChannel.Mono);
speechRecognitionEngine.SetInputToAudioStream(stream, speechAudioFormatInfo);
Console.WriteLine("\r\nGrammar loaded from zero to ten, say exit to shutdown.");
speechRecognitionEngine.RecognizeAsync(RecognizeMode.Multiple);
_waitForXXXCompleted.WaitOne();
//Stop the connector
speechRecognitionConnector.Stop();
Console.WriteLine("Stopping the speech recognition connector");
//speech recognition connector must be detached from the flow, otherwise if the connector is rooted, it will keep the flow in memory.
speechRecognitionConnector.DetachFlow();
// Shutdown the platform
ShutdownPlatform();
_waitForShutdownEventCompleted.WaitOne();
}
public void StopSpeechRecognition()
{
if (!_isActive)
{
NonBlockingConsole.WriteLine("Warn: StopSpeechRecognition() called on an inactive SpeechRecognizer.");
return;
}
_isActive = false;
if (_isRecognizing)
{
_isRecognizing = false;
if (_speechRecognitionEngine != null)
{
_speechRecognitionEngine.RecognizeAsyncCancel();
}
if (_speechRecognitionConnector != null)
{
// Stop the connector
_speechRecognitionConnector.Stop();
// speech recognition connector must be detached from the flow, otherwise if the connector is rooted, it will keep the flow in memory.
_speechRecognitionConnector.DetachFlow();
}
if (_speechRecognitionStream != null)
{
_speechRecognitionStream.Dispose();
_speechRecognitionStream = null;
}
}
if ((_audioVideoFlow != null) && (_audioVideoFlow.SpeechRecognitionConnector != null))
{
_audioVideoFlow.SpeechRecognitionConnector.Stop();
_audioVideoFlow.SpeechRecognitionConnector.DetachFlow();
_audioVideoFlow.StateChanged -= AudioVideoFlow_StateChanged;
_audioVideoFlow = null;
}
_waitForAudioVideoFlowStateChangedToActiveCompleted.Reset();
}
private void StartSpeechRecognition()
{
if (_isActive && !_isRecognizing)
{
_isRecognizing = true;
_waitForLoadGrammarCompleted.WaitOne();
_speechRecognitionConnector.AttachFlow(_audioVideoFlow);
_speechRecognitionStream = _speechRecognitionConnector.Start();
_speechRecognitionEngine.SetInputToAudioStream(_speechRecognitionStream, speechAudioFormatInfo);
_speechRecognitionEngine.RecognizeAsync(RecognizeMode.Multiple);
#if EMULATE_SPEECH
_speechRecognitionEngine.EmulateRecognizeAsync("one");
_speechRecognitionEngine.EmulateRecognizeAsync("two");
_speechRecognitionEngine.EmulateRecognizeAsync("three");
_speechRecognitionEngine.EmulateRecognizeAsync("four");
#endif // EMULATE_SPEECH
}
}
private void StartSpeechRecognition()
{
if (_isActive && !_isRecognizing)
{
_isRecognizing = true;
_waitForLoadGrammarCompleted.WaitOne();
_speechRecognitionConnector.AttachFlow(_audioVideoFlow);
_speechRecognitionStream = _speechRecognitionConnector.Start();
_speechRecognitionEngine.SetInputToAudioStream(_speechRecognitionStream, speechAudioFormatInfo);
_speechRecognitionEngine.RecognizeAsync(RecognizeMode.Multiple);
#if EMULATE_SPEECH
_speechRecognitionEngine.EmulateRecognizeAsync("one");
_speechRecognitionEngine.EmulateRecognizeAsync("two");
_speechRecognitionEngine.EmulateRecognizeAsync("three");
_speechRecognitionEngine.EmulateRecognizeAsync("four");
#endif // EMULATE_SPEECH
}
}
public void StopSpeechRecognition()
{
if (!_isActive)
{
NonBlockingConsole.WriteLine("Warn: StopSpeechRecognition() called on an inactive SpeechRecognizer.");
return;
}
_isActive = false;
if (_isRecognizing)
{
_isRecognizing = false;
if (_speechRecognitionEngine != null)
{
_speechRecognitionEngine.RecognizeAsyncCancel();
}
if (_speechRecognitionConnector != null)
{
// Stop the connector
_speechRecognitionConnector.Stop();
// speech recognition connector must be detached from the flow, otherwise if the connector is rooted, it will keep the flow in memory.
_speechRecognitionConnector.DetachFlow();
}
if (_speechRecognitionStream != null)
{
_speechRecognitionStream.Dispose();
_speechRecognitionStream = null;
}
}
if ((_audioVideoFlow != null) && (_audioVideoFlow.SpeechRecognitionConnector != null))
{
_audioVideoFlow.SpeechRecognitionConnector.Stop();
_audioVideoFlow.SpeechRecognitionConnector.DetachFlow();
_audioVideoFlow.StateChanged -= AudioVideoFlow_StateChanged;
_audioVideoFlow = null;
}
_waitForAudioVideoFlowStateChangedToActiveCompleted.Reset();
}
