/// <summary>
/// Initialize the instance of CART tree manager
/// 1) load and parse the CART question file
/// 2) initialize unit description table data from the phoneme of the
/// specified language and engine type.
/// </summary>
/// <param name="language">Language.</param>
/// <param name="engine">Engine type.</param>
/// <param name="cartQuestionFilePath">CART question file path.</param>
public void Initialize(Language language, EngineType engine,
string cartQuestionFilePath)
{
if (string.IsNullOrEmpty(cartQuestionFilePath))
{
throw new ArgumentNullException("cartQuestionFilePath");
}
_cartQuestionFile = cartQuestionFilePath;
_metaCart = new MetaCart(language, engine);
_metaCart.Initialize(_cartQuestionFile);
}
/// <summary>
/// Compose CRT file.
/// </summary>
/// <param name="language">Language.</param>
/// <param name="engine">Engine type.</param>
/// <param name="unitListFile">Unit list file path.</param>
/// <param name="cartQuestionFile">CART question file path.</param>
/// <param name="binTreeDir">Binary CART tree directory.</param>
/// <param name="crtFile">File list path.</param>
public static void ComposeCrtFile(Language language, EngineType engine,
string unitListFile, string cartQuestionFile, string binTreeDir,
string crtFile)
{
// parse CART question data file
MetaCart meta = new MetaCart(language, engine);
meta.Initialize(cartQuestionFile);
byte[] metaData = meta.ToBytes();
// Handle unit list file
short unitIndex = 1;
int cartIndexingOffset = 0;
Collection<CartIndexingSerial> cartIndexingItems = new Collection<CartIndexingSerial>();
Collection<string> cartFiles = new Collection<string>();
using (StreamReader sr = new StreamReader(unitListFile))
{
string line = string.Empty;
while ((line = sr.ReadLine()) != null)
{
if (string.IsNullOrEmpty(line))
{
continue;
}
// each unit name
string unitName = line.Trim();
if (string.Compare(unitName, "_sil_", StringComparison.OrdinalIgnoreCase) == 0)
{
if (unitIndex == 1)
{
// ignore the first silence unit in the list,
// and all un-silence unit will start indexing from 1
continue;
}
else
{
string message = string.Format(CultureInfo.InvariantCulture,
"silence unit _sil_ found in the middle of the unit list file [{0}].",
unitListFile);
throw new InvalidDataException(message);
}
}
string binCartFile = Path.Combine(binTreeDir, unitName + ".tree");
if (!File.Exists(binCartFile))
{
throw Helper.CreateException(typeof(FileNotFoundException),
binCartFile);
}
cartFiles.Add(binCartFile);
FileInfo fi = new FileInfo(binCartFile);
CartIndexingSerial cartIndexing = new CartIndexingSerial();
cartIndexing.UnitTypeId = unitIndex;
cartIndexing.StartOffset = cartIndexingOffset;
cartIndexing.CartFileSize = (int)fi.Length;
cartIndexingOffset += cartIndexing.CartFileSize;
cartIndexingItems.Add(cartIndexing);
unitIndex++;
}
}
CartHeaderSerial header = new CartHeaderSerial();
header.FeatureOffset = (uint)Marshal.SizeOf(typeof(CartHeaderSerial));
header.FeatureSize = (uint)metaData.Length;
header.CartIdxOffset = header.FeatureOffset + header.FeatureSize;
header.CartIdxNum = (uint)cartIndexingItems.Count;
header.CartDataOffset = header.CartIdxOffset
+ (header.CartIdxNum * (uint)Marshal.SizeOf(typeof(CartIndexingSerial)));
using (FileStream fs = new FileStream(crtFile, FileMode.Create, FileAccess.Write))
{
// write header information of CRT file
byte[] data = header.ToBytes();
fs.Write(data, 0, data.Length);
// write CART question
fs.Write(metaData, 0, metaData.Length);
// write CART tree indexing items for each unit CART tree
foreach (CartIndexingSerial cartIndexingItem in cartIndexingItems)
{
data = cartIndexingItem.ToBytes();
fs.Write(data, 0, data.Length);
}
// write CART data files
foreach (string binTreeFile in cartFiles)
{
data = File.ReadAllBytes(binTreeFile);
fs.Write(data, 0, data.Length);
}
}
}