/// <summary>
/// Set nucleus vowel stress mark.
/// </summary>
/// <param name="phoneme">Phoneme of the language to process.</param>
/// <param name="pronunciation">Pronunciation to set pronunciation.</param>
/// <param name="stress">Stress mark to set for the vowel in the pronunciation.</param>
/// <returns>Pronunciation with stress.</returns>
public static string SetVowelStress(Phoneme phoneme, string pronunciation, TtsStress stress)
{
if (phoneme == null)
{
throw new ArgumentNullException("phoneme");
}
if (string.IsNullOrEmpty(pronunciation))
{
return null;
}
if (stress > TtsStress.None)
{
string[] phones = pronunciation.Split(new char[] { ' ' },
StringSplitOptions.RemoveEmptyEntries);
int vowelIndex = phoneme.GetFirstVowelIndex(phones);
if (vowelIndex < 0)
{
string message = string.Format(CultureInfo.InvariantCulture,
"There is no vowel found in the syllable pronunciation [{0}]",
phones);
throw new InvalidDataException(message);
}
phones[vowelIndex] = string.Format(CultureInfo.InvariantCulture,
"{0} {1}", phones[vowelIndex], (int)stress);
return string.Join(" ", phones);
}
else
{
return pronunciation;
}
}
/// <summary>
/// Calculate the target cost for stress feature.
/// </summary>
/// <param name="src">Source TtsStress feature.</param>
/// <param name="target">Target TtsStress feature.</param>
/// <returns>Cost.</returns>
private float CalcTargetCostTtsStress(TtsStress src, TtsStress target)
{
return CalcTargetCost(TtsFeature.TtsStress, (int)src, (int)target);
}
/// <summary>
/// Convert TtsStress to string used in script file.
/// </summary>
/// <param name="stress">TtsStress.</param>
/// <returns>
/// String representation of TtsStress.
/// </returns>
public static string StressToString(TtsStress stress)
{
string name = string.Empty;
switch (stress)
{
case TtsStress.Primary:
name = @"1";
break;
case TtsStress.Secondary:
name = @"2";
break;
case TtsStress.Tertiary:
name = @"3";
break;
}
return name;
}
