/// <summary>
/// Handle events fired when a result is generated. This may include a garbage rule that fires when general room noise
/// or side-talk is captured (this will have a confidence of Rejected typically, but may occasionally match a rule with
/// low confidence).
/// </summary>
void OnContinuousRecognitionSessionResultGenerated(
SpeechContinuousRecognitionSession sender,
SpeechContinuousRecognitionResultGeneratedEventArgs args)
{
if (args.Result.Status != SpeechRecognitionResultStatus.Success)
{
return;
}
// Unpack event arg data.
bool hasConstraint = args.Result.Constraint != null;
var confidence = args.Result.Confidence;
string phrase = args.Result.Text;
// The garbage rule doesn't have a tag associated with it, and
// the other rules return a string matching the tag provided
// when the grammar was compiled.
string tag = hasConstraint ? args.Result.Constraint.Tag : "unknown";
if (tag == "unknown")
{
return;
}
if (hasConstraint && args.Result.Constraint.Type == SpeechRecognitionConstraintType.List)
{
// The List constraint type represents speech from
// a compiled grammar of commands.
var command = _intentInterpreter.GetPhraseIntent(phrase);
// You may decide to use per-phrase confidence levels in order to
// tune the behavior of your grammar based on testing.
if (confidence == SpeechRecognitionConfidence.Medium ||
confidence == SpeechRecognitionConfidence.High)
{
OnPhraseRecognized(new PhraseRecognizedEventArgs(phrase,
command,
args));
}
}
else if (hasConstraint && args.Result.Constraint.Type == SpeechRecognitionConstraintType.Topic)
{
// The Topic constraint type represents speech from dictation.
OnPhraseRecognized(new PhraseRecognizedEventArgs(phrase,
Command.Dictation,
args));
}
}