/// <summary>
/// Application voice uses a separate SAPI voice to speak self-voicing text.
/// </summary>
private ApplicationVoice()
{
_isEnabled = false;
if (SapiVoice.IsEnabled())
{
_voice = new SapiVoice(true);
_voice.FinishedImmediatePhrase += OnSpeakFinished;
_isEnabled = true;
}
}
// Public Methods (1)
/// <summary>
/// Determines and returns the voice to use for the given phrase. Also takes in a MediaElement
/// as we cannot easily programmatically instantiate a MediaElement (since in order to function
/// a MediaElement must be inserted into the UI Tree).
/// </summary>
/// <param name="currentPhrase">The current phrase to speak.</param>
/// <param name="player">The MediaElement player used to play MP3 audio.</param>
/// <returns>The IVoice to use to speak the given phrase.</returns>
public static VoiceBase GetVoice(Phrase currentPhrase, MediaElement player)
{
if (currentPhrase == null) return null;
if (SapiVoice.IsEnabled() && !currentPhrase.Silent)
_sapiVoice = new SapiVoice(false);
else
_sapiVoice = new SilentVoice(); //Text-to-speech unavailable - use a silent voice instead.
//If there is no included audio use the SAPi/Silent voice, otherwise the MP3
if (currentPhrase.Audio == null)
{
_sapiVoice.Volume = Volume;
return _sapiVoice;
}
if (_mp3Voice == null)
_mp3Voice = new MP3Voice(player) { Volume = Volume };
else
_mp3Voice.ResetVoice();
return _mp3Voice;
}