protected override void DoTaskForFile(string pPath, IVgmtWorkerStruct pExtractAdxStruct, DoWorkEventArgs e)
{
ExtractHcaStruct extractAdxStruct = (ExtractHcaStruct)pExtractAdxStruct;
long offset = 0;
byte revisionMajor;
byte revisionMinor;
ushort dataOffset;
long fmtChunkOffset;
uint blockCount;
ushort blockSize;
long fileSize;
int fileCount = 0;
string outputPath = Path.Combine(Path.GetDirectoryName(pPath), "_cri_hca_ext");
string outputFileName;
string outputFilePath;
FileInfo fi = new FileInfo(pPath);
using (FileStream fs = File.Open(pPath, FileMode.Open, FileAccess.Read))
{
outputPath = Path.Combine(Path.GetDirectoryName(pPath), String.Format("{0}_HCAs", Path.GetFileNameWithoutExtension(pPath)));
while ((offset = ParseFile.GetNextOffsetMasked(fs, offset, HCA_SIG_BYTES, MASK_BYTES)) > -1)
{
if (!this.CancellationPending)
{
// get version
revisionMajor = ParseFile.ReadByte(fs, offset + 4);
revisionMinor = ParseFile.ReadByte(fs, offset + 5);
// get data offset
dataOffset = ParseFile.ReadUshortBE(fs, offset + 6);
// get 'fmt' chunk offset
fmtChunkOffset = ParseFile.GetNextOffsetMasked(fs, offset, FMT_CHUNK_BYTES, MASK_BYTES);
if (fmtChunkOffset > -1)
{
// get block count
blockCount = ParseFile.ReadUintBE(fs, fmtChunkOffset + 8);
// get block size
blockSize = this.getBlockSize(fs, offset);
// calculate file size
fileSize = dataOffset + (blockCount * blockSize);
// extract file
outputFileName = String.Format("{0}_{1}.hca", Path.GetFileNameWithoutExtension(pPath), fileCount.ToString("X8"));
outputFilePath = Path.Combine(outputPath, outputFileName);
this.progressStruct.Clear();
this.progressStruct.GenericMessage = String.Format("{0} - offset: 0x{1} size: 0x{2}{3}", outputFileName, offset.ToString("X8"), fileSize.ToString("X8"), Environment.NewLine);
ReportProgress(Constants.ProgressMessageOnly, this.progressStruct);
ParseFile.ExtractChunkToFile(fs, offset, fileSize, outputFilePath, true, true);
// increment counter
fileCount++;
// move pointer
offset += fileSize;
}
else
{
throw new FormatException(String.Format("'fmt' chunk not found for HCA starting at 0x{0}", offset.ToString("X8")));
}
}
else
{
e.Cancel = true;
return;
}
}
}
}
