/// <summary>
/// Clone current instance to a new one.
/// </summary>
/// <returns>A WaveSegment object.</returns>
public WaveSegment Clone()
{
WaveSegment segment = new WaveSegment();
segment._startTime = _startTime;
segment._endTime = _endTime;
segment._label = _label;
segment._confidence = _confidence;
segment._averagePitch = _averagePitch;
segment._pitchRange = _pitchRange;
segment._rootMeanSquare = _rootMeanSquare;
segment._tag = _tag;
return segment;
}
/// <summary>
/// Load segment data from text reader stream.
/// </summary>
/// <param name="tr">Text reader to read segment from.</param>
/// <param name="setting">Setting.</param>
/// <returns>Wave segment collection.</returns>
public static Collection<WaveSegment> ReadAllData(TextReader tr, SegmentSetting setting)
{
if (tr == null)
{
throw new ArgumentNullException("tr");
}
if (setting == null)
{
throw new ArgumentNullException("setting");
}
Collection<WaveSegment> segs = new Collection<WaveSegment>();
string line = null;
while ((line = tr.ReadLine()) != null)
{
if (string.IsNullOrEmpty(line))
{
continue;
}
if (line == ".")
{
// end of section
break;
}
string[] items = line.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
if (items.Length < 2 && !setting.HasEndTime)
{
string message = string.Format(CultureInfo.InvariantCulture,
"The normal segment line of alignment file shoud be (timestamp) (label) [confidence score]. But '{0}' is found.",
line);
throw new InvalidDataException(message);
}
if (items.Length < 3 && setting.HasEndTime)
{
string message = string.Format(CultureInfo.InvariantCulture,
"The normal segment line of alignment file should be (timestamp) (timestamp) (label) [confidence score]. But '{0}' is found.",
line);
throw new InvalidDataException(message);
}
WaveSegment seg = new WaveSegment();
try
{
seg.StartTime = float.Parse(items[0], CultureInfo.InvariantCulture);
if (!setting.HasEndTime)
{
if (items.Length == 3)
{
seg.Confidence = float.Parse(items[2], CultureInfo.InvariantCulture);
}
}
else
{
seg.EndTime = float.Parse(items[1], CultureInfo.InvariantCulture);
}
}
catch (FormatException)
{
string message = string.Format(CultureInfo.InvariantCulture,
"Malformed line found as '{0}'",
line);
throw new InvalidDataException(message);
}
seg.Label = Phoneme.ToOffline(items[setting.HasEndTime ? 2 : 1]);
segs.Add(seg);
}
RemoveDuplicatedSilence(segs);
for (int i = 0; i < segs.Count - 1; i++)
{
if (!setting.HasEndTime)
{
segs[i].EndTime = segs[i + 1].StartTime;
}
else
{
if (segs[i].StartTime > segs[i].EndTime)
{
string message = string.Format(CultureInfo.InvariantCulture,
"The start time of the {0}(th) segment [{1}] must not be later the end time of it.",
i, segs[i].Label);
throw new InvalidDataException(message);
}
}
if (segs[i].StartTime > segs[i + 1].StartTime)
{
string message = string.Format(CultureInfo.InvariantCulture,
"The start time of the {0}(th) segment [{1}] must not be later than the start time of the following segment [{2}].",
i, segs[i].Label, segs[i + 1].Label);
throw new InvalidDataException(message);
}
}
return segs;
}
/// <summary>
/// Insert a new short pause phone in the given index.
/// The duration of the short pause will be equally splitted from the left and right adjacent phones.
/// </summary>
/// <param name="index">The new short pause phone will be inserted into the position represented by 'index'.</param>
public void InsertShortPauseSegment(int index)
{
// Can not insert short pause in the first/last position
Debug.Assert(index > 0 && index < _waveSegments.Count - 1);
const float SplittingRatio = 0.25f;
WaveSegment newShortPauseSegment = new WaveSegment();
_waveSegments[index - 1].EndTime = _waveSegments[index - 1].StartTime + (_waveSegments[index - 1].Duration * (1 - SplittingRatio));
_waveSegments[index].StartTime = _waveSegments[index].EndTime - (_waveSegments[index].Duration * (1 - SplittingRatio));
newShortPauseSegment.StartTime = _waveSegments[index - 1].EndTime;
newShortPauseSegment.EndTime = _waveSegments[index].StartTime;
newShortPauseSegment.Label = Phoneme.ShortPausePhone;
_waveSegments.Insert(index, newShortPauseSegment);
}
