/// <summary>
/// Enqueues an utterance to be spoken with using specific parameters
/// </summary>
/// <param name="speechUtterance">A chunk of text to be spoken, along with parameters that affect its speech.</param>
public static void Speak(SpeechUtterance speechUtterance)
{
var voiceIdentifier = speechUtterance.Voice == null ? string.Empty : speechUtterance.Voice.Identifier;
TTS_iOS.Speak(speechUtterance.SpeechString, speechUtterance.PitchMultiplier,
speechUtterance.PreUtteranceDelay, speechUtterance.PostUtteranceDelay, speechUtterance.SpeechRate,
voiceIdentifier, speechUtterance.Volume);
}
private ReadOnlyCollection <ISpeechSynthesisVoice> InitializeVoices()
{
var availableVoicesCount = TTS_iOS.GetNumberOfAvailableVoices();
var availableVoices = new ISpeechSynthesisVoice[availableVoicesCount];
for (var voiceIndex = 0; voiceIndex < availableVoicesCount; voiceIndex++)
{
var identifier = TTS_iOS.GetVoiceIdentifier(voiceIndex);
var name = TTS_iOS.GetVoiceName(voiceIndex);
var language = TTS_iOS.GetVoiceLanguage(voiceIndex);
var quality = TTS_iOS.GetVoiceQuality(voiceIndex);
availableVoices[voiceIndex] =
new SpeechSynthesisVoice(identifier, name, language, (VoiceQuality)quality);
}
return(new ReadOnlyCollection <ISpeechSynthesisVoice>(availableVoices));
}
private void SetupCallbacks()
{
TTS_iOS.SetupCallbacks(OnSpeechCancelledCallback, OnSpeechContinuedCallback,
OnSpeechFinishedCallback, OnSpeechPausedCallback, OnSpeechStartedCallback, OnWillSpeakCallback);
}
/// <summary>
/// Returns a voice object for the specified language and locale.
/// </summary>
/// <param name="language">A BCP 47 code specifying language and locale for a voice.</param>
/// <returns>Returns null if no voice available for the specified language</returns>
public static ISpeechSynthesisVoice GetVoiceForLanguage(string language)
{
var voiceId = TTS_iOS.GetVoiceIdentifierFromLanguageCode(language);
return(AllAvailableVoices.FirstOrDefault(voice => voice.Identifier == voiceId));
}
/// <summary>
/// Stops all speech at the specified boundary constraint.
/// </summary>
/// <param name="speechBoundary">A constant describing whether speech should stop immediately or only after finishing the word currently being spoken.</param>
/// <returns>true if speech has stopped, or false otherwise.</returns>
public static bool Stop(SpeechBoundary speechBoundary)
{
return(TTS_iOS.StopSpeaking(speechBoundary));
}
/// <summary>
/// Stops all speech at default boundary constraints.
/// </summary>
/// <returns>true if speech has stopped, or false otherwise.</returns>
public static bool Stop()
{
return(TTS_iOS.StopSpeaking(DefaultSpeechBoundaryForStop));
}
/// <summary>
/// Pauses speech at the specified boundary constraint.
/// </summary>
/// <param name="speechBoundary">A constant describing whether speech should pause immediately or only after finishing the word currently being spoken.</param>
/// <returns>true if speech has paused, or false otherwise.</returns>
public static bool Pause(SpeechBoundary speechBoundary)
{
return(TTS_iOS.PauseSpeaking(speechBoundary));
}
/// <summary>
/// Pauses speech at default boundary constraints.
/// </summary>
/// <returns>true if speech has paused, or false otherwise.</returns>
public static bool Pause()
{
return(TTS_iOS.PauseSpeaking(DefaultSpeechBoundaryForPause));
}
/// <summary>
/// Continues speech from the point at which it left off.
/// </summary>
/// <returns>true if speech has continued, or false otherwise.</returns>
public static bool Continue()
{
return(TTS_iOS.ContinueSpeaking());
}