private Stream GetTableDataStream()
{
var stream = _stream;
var offset = _offset;
var tableSize = (int)_utfReader.PeekUInt32(stream, offset, 4) + 8;
if (!IsEncrypted)
{
return(AcbHelper.ExtractToNewStream(stream, offset, tableSize));
}
// Another reading process. Unlike the one with direct reading, this may encounter UTF table decryption.
var originalPosition = stream.Position;
var totalBytesRead = 0;
var memory = new byte[tableSize];
var currentIndex = 0;
var currentOffset = offset;
do
{
var shouldRead = tableSize - totalBytesRead;
var buffer = _utfReader.PeekBytes(stream, currentOffset, shouldRead, totalBytesRead);
Array.Copy(buffer, 0, memory, currentIndex, buffer.Length);
currentOffset += buffer.Length;
currentIndex += buffer.Length;
totalBytesRead += buffer.Length;
} while (totalBytesRead < tableSize);
stream.Position = originalPosition;
var memoryStream = new MemoryStream(memory, false)
{
Capacity = tableSize
};
memoryStream.Seek(0, SeekOrigin.Begin);
return(memoryStream);
}
private Stream GetDataStreamFromCueInfo(AcbCueRecord cue, string fileNameForErrorInfo)
{
if (!cue.IsWaveformIdentified)
{
throw new InvalidOperationException($"File '{fileNameForErrorInfo}' is not identified.");
}
Stream result;
if (cue.IsStreaming)
{
var externalAwb = ExternalAwb;
if (externalAwb == null)
{
throw new InvalidOperationException($"External AWB does not exist for streaming file '{fileNameForErrorInfo}'.");
}
if (!externalAwb.Files.ContainsKey(cue.WaveformId))
{
throw new InvalidOperationException($"Waveform ID {cue.WaveformId} is not found in AWB file {externalAwb.FileName}.");
}
var targetExternalFile = externalAwb.Files[cue.WaveformId];
using (var fs = File.Open(externalAwb.FileName, FileMode.Open, FileAccess.Read, FileShare.Read)) {
result = AcbHelper.ExtractToNewStream(fs, targetExternalFile.FileOffsetAligned, (int)targetExternalFile.FileLength);
}
}
else
{
var internalAwb = InternalAwb;
if (internalAwb == null)
{
throw new InvalidOperationException($"Internal AWB is not found for memory file '{fileNameForErrorInfo}' in '{AcbFileName}'.");
}
if (!internalAwb.Files.ContainsKey(cue.WaveformId))
{
throw new InvalidOperationException($"Waveform ID {cue.WaveformId} is not found in internal AWB in {AcbFileName}.");
}
var targetInternalFile = internalAwb.Files[cue.WaveformId];
result = AcbHelper.ExtractToNewStream(Stream, targetInternalFile.FileOffsetAligned, (int)targetInternalFile.FileLength);
}
return(result);
}
public Stream OpenDataStream(string fileName)
{
AcbCueRecord cue;
try {
cue = Cues.Single(c => c.CueName == fileName);
} catch (InvalidOperationException ex) {
throw new InvalidOperationException($"File '{fileName}' is not found or it has multiple entries.", ex);
}
if (!cue.IsWaveformIdentified)
{
throw new InvalidOperationException($"File '{fileName}' is not identified.");
}
if (cue.IsStreaming)
{
var externalAwb = ExternalAwb;
if (externalAwb == null)
{
throw new InvalidOperationException($"External AWB does not exist for streaming file '{fileName}'.");
}
if (!externalAwb.Files.ContainsKey(cue.WaveformId))
{
throw new InvalidOperationException($"Waveform ID {cue.WaveformId} is not found in AWB file {externalAwb.FileName}.");
}
var targetExternalFile = externalAwb.Files[cue.WaveformId];
using (var fs = File.Open(externalAwb.FileName, FileMode.Open, FileAccess.Read)) {
return(AcbHelper.ExtractToNewStream(fs, targetExternalFile.FileOffsetAligned, (int)targetExternalFile.FileLength));
}
}
else
{
var internalAwb = InternalAwb;
if (internalAwb == null)
{
throw new InvalidOperationException($"Internal AWB is not found for memory file '{fileName}' in '{AcbFileName}'.");
}
if (!internalAwb.Files.ContainsKey(cue.WaveformId))
{
throw new InvalidOperationException($"Waveform ID {cue.WaveformId} is not found in internal AWB in {AcbFileName}.");
}
var targetInternalFile = internalAwb.Files[cue.WaveformId];
return(AcbHelper.ExtractToNewStream(Stream, targetInternalFile.FileOffsetAligned, (int)targetInternalFile.FileLength));
}
}
