/// <summary>
/// Default constructor. Sets up the voice recognizer with default settings.
///
/// Namely, default options are: en-US, default input device, listen always, confidence level at .90
/// </summary>
public VoiceRecognizer()
{
if (SpeechRecognitionEngine.InstalledRecognizers().Count == 0)
{
SetupError = "You don't appear to have any Microsoft Speech Recognizer packs installed on your system.";
State = VoiceRecognizerState.Error;
return;
}
try
{
var installedRecognizers = SpeechRecognitionEngine.InstalledRecognizers();
RecognizerInfo speechRecognizer = null;
switch (CultureInfo.InstalledUICulture.Name)
{
case "en-GB":
speechRecognizer = (installedRecognizers.FirstOrDefault(x => x.Culture.Name == "en-GB") ?? installedRecognizers.FirstOrDefault(x => x.Culture.TwoLetterISOLanguageName == "en"));
break;
case "en-US":
default:
speechRecognizer = installedRecognizers.FirstOrDefault(x => x.Culture.TwoLetterISOLanguageName == "en");
break;
}
if (speechRecognizer == null)
{
SetupError = String.Format("You don't appear to have the {0} Speech Recognizer installed. Articulate requires this recognizer to be present in order to function correctly.", "English");
State = VoiceRecognizerState.Error;
return;
}
// Setup members
ConfidenceLock = new Object();
EngineShuttingDown = new AutoResetEvent(false);
State = VoiceRecognizerState.Paused;
// Create a new SpeechRecognitionEngine instance.
Engine = new SpeechRecognitionEngine(speechRecognizer);
try
{
// Setup the audio device
Engine.SetInputToDefaultAudioDevice();
}
catch (InvalidOperationException ex)
{
// No default input device
Trace.WriteLine(ex.Message);
SetupError = "Check input device.\n\n";
State = VoiceRecognizerState.Error;
return;
}
// Set the confidence setting
ConfidenceMargin = 90;
// Create the Grammar instance and load it into the speech recognition engine.
Grammar g = new Grammar(CommandPool.BuildSrgsGrammar(speechRecognizer.Culture));
Engine.LoadGrammar(g);
// Register a handlers for the SpeechRecognized and SpeechRecognitionRejected event
Engine.SpeechRecognized += sre_SpeechRecognized;
Engine.SpeechRecognitionRejected += sre_SpeechRecognitionRejected;
Engine.RecognizeCompleted += sre_RecognizeCompleted;
StartListening();
}
catch (Exception ex)
{
// Something went wrong setting up the voiceEngine.
Trace.WriteLine(ex.Message);
SetupError = String.Format("{0}\nCurrent Culture: {1}\nAvailable Recognizers: {2}\nStack Trace:\n{3}", ex.Message, CultureInfo.InstalledUICulture.Name, SpeechRecognitionEngine.InstalledRecognizers().Select(x => x.Culture.Name).Aggregate((x, y) => x + ", " + y), ex.StackTrace);
State = VoiceRecognizerState.Error;
}
}
/// <summary>
/// Default constructor. Sets up the voice recognizer with default settings.
///
/// Namely, default options are: en-US, default input device, listen always, confidence level at .90
/// </summary>
public VoiceRecognizer()
{
try
{
// detect the system locale and use the best recognizer for the job.
CultureInfo cultureInfo = null;
foreach (RecognizerInfo ri in SpeechRecognitionEngine.InstalledRecognizers())
{
// TODO: change to support more languages as they get added in
if (ri.Culture.Equals(CultureInfo.CurrentCulture) && ri.Culture.TwoLetterISOLanguageName.Equals("en"))
{
cultureInfo = ri.Culture;
}
}
// default to en-US
if (cultureInfo == null)
{
cultureInfo = new CultureInfo("en-US");
}
// Setup members
ConfidenceLock = new Object();
EngineShuttingDown = new AutoResetEvent(false);
State = VoiceRecognizerState.Paused;
// Create a new SpeechRecognitionEngine instance.
Engine = new SpeechRecognitionEngine(cultureInfo);
try
{
// Setup the audio device
Engine.SetInputToDefaultAudioDevice();
}
catch (InvalidOperationException ex)
{
// No default input device
Trace.WriteLine(ex.Message);
SetupError = "Check input device.\n\n";
State = VoiceRecognizerState.Error;
return;
}
// Set the confidence setting
ConfidenceMargin = 90;
// Create the Grammar instance and load it into the speech recognition engine.
Grammar g = new Grammar(CommandPool.BuildSrgsGrammar(cultureInfo));
Engine.LoadGrammar(g);
// Register a handlers for the SpeechRecognized and SpeechRecognitionRejected event
Engine.SpeechRecognized += sre_SpeechRecognized;
Engine.SpeechRecognitionRejected += sre_SpeechRecognitionRejected;
Engine.RecognizeCompleted += sre_RecognizeCompleted;
StartListening();
}
catch (Exception ex)
{
// Something went wrong setting up the voiceEngine.
Trace.WriteLine(ex.Message);
SetupError = ex.ToString();
State = VoiceRecognizerState.Error;
}
}
