/// <summary>
/// Runs the service.
/// </summary>
/// <param name="state">The state<see cref="object"/></param>
private static async void Run(object state)
{
try
{
// restart listener if nothing has happend for more than 30 seconds
if (lastListenCylce > DateTime.Now.AddSeconds(-30))
{
return;
}
if (recognizer != null)
{
try
{
await recognizer.StopRecognitionAsync();
}
catch (Exception ex)
{
Log(ex);
}
}
recognizer = new SpeechRecognizer(new Language("de-DE"));
recognizer.Timeouts.InitialSilenceTimeout = TimeSpan.FromSeconds(2);
recognizer.Timeouts.EndSilenceTimeout = TimeSpan.FromSeconds(0.5);
recognizer.StateChanged += RecognizerStateChanged;
recognizer.ContinuousRecognitionSession.ResultGenerated += RecognizerResultGenerated;
var textGrammar = new SpeechRecognitionListConstraint(new List <string> {
"Licht an", "Licht aus"
});
var webSearchGrammar = new SpeechRecognitionTopicConstraint(SpeechRecognitionScenario.WebSearch, "webSearch");
recognizer.Constraints.Add(textGrammar);
recognizer.Constraints.Add(webSearchGrammar);
SpeechRecognitionCompilationResult compilationResult = await recognizer.CompileConstraintsAsync();
if (compilationResult.Status == SpeechRecognitionResultStatus.Success)
{
Log(LogLevel.Debug, "Speechrecognition compile result: " + compilationResult.ToString());
await Listen();
}
else
{
Log(LogLevel.Debug, "Speechrecognition compile result: " + compilationResult.ToString());
}
}
catch (Exception ex)
{
Log(ex);
}
}
// Initialize Speech Recognizer and start async recognition
private async void initializeSpeechRecognizer()
{
// Initialize recognizer
recognizer = new SpeechRecognizer();
// Set event handlers
recognizer.StateChanged += RecognizerStateChanged;
recognizer.ContinuousRecognitionSession.ResultGenerated += RecognizerResultGenerated;
// Load Grammar file constraint
string fileName = String.Format(SRGS_FILE);
StorageFile grammarContentFile = await Package.Current.InstalledLocation.GetFileAsync(fileName);
SpeechRecognitionGrammarFileConstraint grammarConstraint = new SpeechRecognitionGrammarFileConstraint(grammarContentFile);
// Add to grammar constraint
recognizer.Constraints.Add(grammarConstraint);
// Compile grammar
SpeechRecognitionCompilationResult compilationResult = await recognizer.CompileConstraintsAsync();
Debug.WriteLine("Status: " + compilationResult.Status.ToString());
// If successful, display the recognition result.
if (compilationResult.Status == SpeechRecognitionResultStatus.Success)
{
Debug.WriteLine("Result: " + compilationResult.ToString());
await recognizer.ContinuousRecognitionSession.StartAsync();
}
else
{
Debug.WriteLine("Status: " + compilationResult.Status);
}
}
private async void StartSpeechRecognizer()
{
// Compile the loaded GrammarFiles
SpeechRecognitionCompilationResult compilationResult = await _recognizer.CompileConstraintsAsync();
// If successful, display the recognition result.
if (compilationResult.Status == SpeechRecognitionResultStatus.Success)
{
Debug.WriteLine("Result: " + compilationResult.ToString());
SpeechContinuousRecognitionSession session = _recognizer.ContinuousRecognitionSession;
try
{
await session.StartAsync();
}
catch (Exception e)
{
//TODO this needs to report to the user that something failed.
//also potentially write to a log somewhere.
Debug.WriteLine(e.Data);
}
}
else
{
//TODO this needs to report to the user that something failed.
//also potentially write to a log somewhere.
Debug.WriteLine("Status: " + compilationResult.Status);
}
}