/// <summary>
/// Retrieves all supported voices of the current engine.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <returns>
/// The list of SupportedVoice.
/// </returns>
/// <feature>
/// http://tizen.org/feature/speech.synthesis
/// </feature>
/// <exception cref="InvalidOperationException">
/// This exception can be due to the following reasons:
/// 1. Engine Not Found
/// 2. Operation Failed
/// </exception>
/// <exception cref="NotSupportedException">This exception can be due to TTS not supported.</exception>
public IEnumerable <SupportedVoice> GetSupportedVoices()
{
List <SupportedVoice> voicesList = new List <SupportedVoice>();
_supportedvoiceDelegate = (IntPtr handle, IntPtr language, int voiceType, IntPtr userData) =>
{
string lang = Marshal.PtrToStringAnsi(language);
SupportedVoice voice = new SupportedVoice(lang, voiceType);
voicesList.Add(voice);
return(true);
};
TtsError error = TtsForeachSupportedVoices(_handle, _supportedvoiceDelegate, IntPtr.Zero);
if (error != TtsError.None)
{
Log.Error(LogTag, "GetSupportedVoices Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
return(voicesList);
}
internal static extern TtsError TtsForeachSupportedVoices(IntPtr handle, TtsSupportedVoiceCB callback, IntPtr userData);