/// <summary>
/// Build coda units from the phone list.
/// </summary>
/// <param name="sliceData">Slice data.</param>
/// <param name="phones">Phones to process.</param>
/// <param name="codaOffset">The offset of the first phone in coda group.</param>
/// <param name="slicedUnits">Unit container to append result coda units.</param>
private static void BuildCodaUnits(SliceData sliceData,
TtsMetaPhone[] phones, int codaOffset, List<string> slicedUnits)
{
int remainPhoneCount = phones.Length - codaOffset;
int codaUnitOffset = slicedUnits.Count;
// t w ih 1 k s t
if (remainPhoneCount > 0)
{
int codaStartCursor = codaOffset;
while (remainPhoneCount > 0)
{
int phoneCount = remainPhoneCount - (codaStartCursor - codaOffset);
string tentativeCoda =
TtsMetaPhone.Join(TtsUnit.PhoneDelimiter, phones,
codaStartCursor, phoneCount);
if (remainPhoneCount != 1 &&
sliceData.CodaSlices.IndexOf(tentativeCoda.Replace(TtsUnit.PhoneDelimiter, " ")) < 0 &&
phoneCount != 1)
{
codaStartCursor++;
}
else
{
// Left single phone will be treated as coda unit
slicedUnits.Insert(codaUnitOffset, TtsUnit.CodaPrefix + tentativeCoda);
remainPhoneCount = codaStartCursor - codaOffset;
codaStartCursor = codaOffset;
}
}
}
}
/// <summary>
/// Build phone names array of the unit, not contain tone.
/// </summary>
/// <param name="phones">TtsMetaPhone array to be processed.</param>
/// <returns>Phone name array, not contain tone.</returns>
public static string[] BuildPhoneNames(TtsMetaPhone[] phones)
{
if (phones == null || phones.Length == 0)
{
throw new ArgumentNullException("phones");
}
List<string> phonesString = new List<string>();
foreach (TtsMetaPhone phone in phones)
{
phonesString.Add(phone.Name);
}
return phonesString.ToArray();
}
/// <summary>
/// Build a phone array from a slice string.
/// </summary>
/// <param name="language">Language of the unit.</param>
/// <param name="unit">Slice string, the text should only contain phone and tone,
/// but not contain stress.</param>
/// <returns>Phone array.</returns>
public static TtsMetaPhone[] BuildPhones(Language language, string unit)
{
// should use mapping table for zh-CN
// this is for en-US
if (string.IsNullOrEmpty(unit))
{
throw new ArgumentNullException("unit");
}
List<TtsMetaPhone> phones = new List<TtsMetaPhone>();
string[] elements = unit.Split(new char[]
{
' ', '+'
},
StringSplitOptions.RemoveEmptyEntries);
ToneManager toneManager = Localor.GetPhoneme(language).ToneManager;
for (int i = 0; i < elements.Length; i++)
{
TtsMetaPhone phone = new TtsMetaPhone(language);
phone.Name = elements[i];
// Check the next element is tone.
if (i + 1 < elements.Length)
{
Match match = Regex.Match(elements[i + 1], TtsMetaPhone.TtsToneRegex);
if (match.Success)
{
string toneString = match.Groups["index"].Value;
phone.Tone = toneManager.GetContextToneId(toneString);
i++;
}
}
phones.Add(phone);
}
if (phones.Count <= 0)
{
throw new InvalidDataException(Helper.NeutralFormat("Invalid unit format, can't extract " +
"phone from unit [{0}]", unit));
}
return phones.ToArray();
}
/// <summary>
/// Get phone string of specified phones.
/// </summary>
/// <param name="separator">Separator for the joint phone.</param>
/// <param name="phones">TtsPhones to be joint.</param>
/// <param name="startIndex">Start index from where to join the phone.</param>
/// <param name="count">Cont of the phone to be joint.</param>
/// <returns>Full name of all the phones to be joint.</returns>
public static string Join(string separator,
TtsMetaPhone[] phones, int startIndex, int count)
{
if (string.IsNullOrEmpty(separator))
{
throw new ArgumentNullException("separator");
}
if (phones == null)
{
throw new ArgumentNullException("phones");
}
if (startIndex >= phones.Length || count <= 0 || startIndex + count - 1 >= phones.Length)
{
throw new InvalidDataException(Helper.NeutralFormat("Invalid index/lenght parameter [phones.Length=" +
"{0}, startIndex={1}, count={2}", phones.Length, startIndex, count));
}
StringBuilder sb = new StringBuilder();
for (int i = startIndex; i < startIndex + count; i++)
{
if (sb.Length > 0)
{
sb.Append(separator);
}
sb.Append(phones[i].Name);
if (phones[i].Tone != ToneManager.NoneContextTone)
{
sb.Append(string.Format(CultureInfo.InvariantCulture, "{0}{1}", separator, phones[i].ToneString));
}
}
return sb.ToString();
}
