/// <summary>
/// Writes the right margin if possible.
/// </summary>
/// <param name="waveFile">The given wave file where the current candidate belongs to.</param>
/// <param name="candidate">The current candidate.</param>
/// <param name="candidateInfo">The candidate information of the current candidate.</param>
private void WriteRightMargin(WaveFile waveFile, UnitCandidate candidate, WaveCandidateInfo candidateInfo)
{
if (_ccMarginLength + _fsMarginLength > 0)
{
int rightMarginLength = (_ccMarginLength / 2) + _fsMarginLength;
int waveSampleOffsetInSentence = (int)((candidate.StartTimeInSecond * waveFile.Format.SamplesPerSecond) + 0.5f);
int waveSampleLength = (int)(((candidate.EndTimeInSecond - candidate.StartTimeInSecond) * waveFile.Format.SamplesPerSecond) + 0.5f);
// Right margin section.
if (candidate.Index == candidate.Sentence.Candidates.Count - 1)
{
// It means the candidate is the last one, there is no next candidate. So, writes some zero as margin.
WriteZeroMargin(rightMarginLength);
}
else if (candidate.Sentence.Candidates[candidate.Index + 1].Id == UnitCandidate.InvalidId)
{
// There is a next candidate and it isn't in the inventory. So, writes the next candidate as margin.
int offset = (int)(waveSampleOffsetInSentence + waveSampleLength);
int count = (waveFile.GetSoundData().Length / (waveFile.Format.BitsPerSample / 8)) - offset;
if (count < rightMarginLength)
{
WriteIntoInventory(ConvertsWaveDataFormat(waveFile, offset, count));
WriteZeroMargin(rightMarginLength - count);
}
else
{
WriteIntoInventory(ConvertsWaveDataFormat(waveFile, offset, rightMarginLength));
}
}
}
}
/// <summary>
/// Writes the left margin if possible.
/// </summary>
/// <param name="waveFile">The given wave file where the current candidate belongs to.</param>
/// <param name="candidate">The current candidate.</param>
/// <param name="candidateInfo">The candidate information of the current candidate.</param>
private void WriteLeftMargin(WaveFile waveFile, UnitCandidate candidate, WaveCandidateInfo candidateInfo)
{
if (_ccMarginLength + _fsMarginLength > 0)
{
int leftMarginLength = _ccMarginLength + _fsMarginLength;
int waveSampleOffsetInSentence = (int)((candidate.StartTimeInSecond * waveFile.Format.SamplesPerSecond) + 0.5f);
// Left margin section.
if (candidate.Index == 0)
{
// It means the candidate is the first one, there is no previous candidate. So, writes some zero as margin.
WriteZeroMargin(leftMarginLength);
}
else if (candidate.Sentence.Candidates[candidate.Index - 1].Id == UnitCandidate.InvalidId)
{
// There is a previous candidate and it isn't in the inventory. So, writes the previous candidate as margin.
int offset = (int)(waveSampleOffsetInSentence - leftMarginLength);
int count = leftMarginLength;
if (offset < 0)
{
// The margin is longer than the previous candidate, uses zero to fill them.
WriteZeroMargin(-offset);
count += offset;
offset = 0;
}
WriteIntoInventory(ConvertsWaveDataFormat(waveFile, offset, count));
}
}
}
