/// <summary>
/// Saves the candidate into the lines in the format of master label file.
/// </summary>
/// <param name="typeOption">The given label type.</param>
/// <param name="alignOption">The given alignment data.</param>
/// <param name="keepRemainingPart">Whether to keep the remaining part.</param>
/// <returns>The lines contains the candidate information.</returns>
public string[] Save(LabelTypeOptions typeOption, LabelAlignOptions alignOption, bool keepRemainingPart)
{
if (alignOption == LabelAlignOptions.StateAlign)
{
string[] result = new string[StateAlignments.Length];
for (int i = 0; i < StateAlignments.Length; ++i)
{
LabelLine labelHelper = new LabelLine
{
Label = Label,
Segment = StateAlignments[i],
State = 2 + i
};
if (LabelRemainings != null && LabelRemainings.Count > 0)
{
labelHelper.Remaining = LabelRemainings[2 + i];
}
// Since Htk state index starts with 2.
result[i] = labelHelper.ToString(typeOption, keepRemainingPart);
}
return result;
}
LabelLine labelLine = new LabelLine { State = -1, Label = Label };
if (LabelRemainings != null && LabelRemainings.Count > 0)
{
if (LabelRemainings.ContainsKey(-1))
{
labelLine.Remaining = LabelRemainings[-1];
}
else if (LabelRemainings.ContainsKey(2))
{
labelLine.Remaining = LabelRemainings[2];
}
}
switch (alignOption)
{
case LabelAlignOptions.NoAlign:
labelLine.Segment = null;
break;
case LabelAlignOptions.PhonemeAlign:
if (_stateSegments == null)
{
throw new InvalidOperationException("Unsupported operation since there is no alignment data in Candidate");
}
labelLine.Segment = new Segment(StartTime, EndTime);
break;
default:
throw new InvalidDataException("Unknown HtkLabelAlignOptions value");
}
return new[] { labelLine.ToString(typeOption, keepRemainingPart) };
}
/// <summary>
/// Parses a string and return a HtkLabelHelper instance by given LabelFeatureNameSet.
/// </summary>
/// <param name="value">The given string to be parsed.</param>
/// <param name="featureNames">The given feature names.</param>
/// <returns>The parsed HtkLabelHelper.</returns>
public static LabelLine Parse(string value, LabelFeatureNameSet featureNames)
{
LabelLine labelLine = new LabelLine
{
// Initialize state as a negative value.
State = -1,
};
string labelText;
string[] parts = value.Split(SplitterChars, StringSplitOptions.RemoveEmptyEntries);
switch (parts.Length)
{
case 1:
labelText = parts[0];
break;
case 2:
// Invalid currently.
throw new InvalidDataException(Helper.NeutralFormat("Unsupported data \"{0}\"", value));
default:
labelLine.Segment = new Segment(long.Parse(parts[0]), long.Parse(parts[1]));
labelText = parts[2];
// Keep the remaining values.
if (parts.Length > 3)
{
labelLine.Remaining = new string[parts.Length - 3];
Array.Copy(parts, 3, labelLine.Remaining, 0, labelLine.Remaining.Length);
}
break;
}
labelLine.Label = new Label(featureNames);
// Check there is state information or not.
if (labelText[labelText.Length - 1] == ']')
{
// The state info is appended to the label text as: a-b+c+x...x[state]
// Find the previous "["
int index = labelText.LastIndexOf('[');
if (index < 0)
{
throw new InvalidDataException(Helper.NeutralFormat("Unsupport format \"{0}\"", labelText));
}
labelLine.Label.Text = labelText.Substring(0, index);
labelLine.State = int.Parse(labelText.Substring(index + 1, labelText.Length - index - 2));
}
else
{
labelLine.Label.Text = labelText;
}
return labelLine;
}
