/// <summary>
/// Finalizes an intermediate speech recognition result.
/// </summary>
/// <param name="result">The intermediate speech recognition result.</param>
/// <param name="audio">The audio corresponding to the finalized speech recognition result.</param>
/// <param name="duration">The duration of the utterance.</param>
/// <returns>The final speech recognition result.</returns>
internal static StreamingSpeechRecognitionResult ToFinal(this StreamingSpeechRecognitionResult result, AudioBuffer audio = default, TimeSpan duration = default)
{
return(new StreamingSpeechRecognitionResult(
true,
result.Text,
result.Confidence,
result.Alternates.Cast <SpeechRecognitionAlternate>(),
audio.HasValidData ? audio : result.Audio,
duration != default ? duration : result.Duration));
}
/// <summary>
/// Composes two consecutive speech recognition results.
/// </summary>
/// <param name="result1">The first speech recognition result.</param>
/// <param name="result2">The second speech recognition result.</param>
/// <param name="rankOrder">A value indicating whether the alternates should be scored by original rank order or confidence.</param>
/// <returns>The composed speech recognition result.</returns>
internal static StreamingSpeechRecognitionResult Compose(this StreamingSpeechRecognitionResult result1, StreamingSpeechRecognitionResult result2, bool rankOrder = true)
{
// limit the number of alternates to prevent exponential growth through composition
int maxAlternates = Math.Max(result1.Alternates.Length, result2.Alternates.Length);
return(new StreamingSpeechRecognitionResult(
false,
Compose(result1.Text, result2.Text),
Combine(result1.Confidence, result2.Confidence),
Compose(result1.Alternates, result2.Alternates, rankOrder).OrderByDescending(alt => alt.score).Take(maxAlternates).Select(alt => alt.value),
null,
result1.Duration + result2.Duration));
}
private void OutputResult(StreamingSpeechRecognitionResult result, DateTime originatingTime)
{
lock (this.outputLock)
{
if (originatingTime < this.lastOutputPostTime)
{
originatingTime = this.lastOutputPostTime;
}
this.Out.Post(result, originatingTime);
this.lastOutputPostTime = originatingTime;
}
}
