private static SinFile.BlockInfoHeader GetBIH(BinaryReader br)
{
SinFile.BlockInfoHeader bih = new SinFile.BlockInfoHeader();
bih.magic = br.ReadBytes(4);
bih.BIHLength = Utility.ReadIntBigEndian(br);
if (SinFile.isCompressed(bih) && bih.BIHLength != _BIHSizeCompressed)
{
throw new FormatException("woot, compressed bih is spooky");
}
bih.dataStart = Utility.ReadLongBigEndian(br);
if (SinFile.isCompressed(bih))
{
bih.blockSize = Utility.ReadLongBigEndian(br);
}
bih.dataLength = Utility.ReadLongBigEndian(br);
bih.dataDest = Utility.ReadLongBigEndian(br);
if (SinFile.isCompressed(bih))
{
bih.destLength = Utility.ReadLongBigEndian(br);
}
//skip for performance
br.BaseStream.Position += 0x24;
//bih.HashType = Utility.ReadIntBigEndian(br);
//bih.SHA256 = br.ReadBytes(0x20);
return(bih);
}
public static byte[] ReadSinUUID(string sinfile)
{
using (Stream stream = new FileStream(sinfile, FileMode.Open, FileAccess.Read))
using (BinaryReader br = new BinaryReader(stream))
{
if (SinFile.GetSinVersion(br) == 2)
{
return(null);
}
return(SinFileV3.GetUUID(br));
}
}
private static void ExtractSinData(BackgroundWorker sender, BinaryReader br, List <SinFile.BlockInfoHeader> bihs, string destination, bool showProgress = true)
{
using (FileStream fsw = new FileStream(destination, FileMode.Create))
using (BinaryWriter bw = new BinaryWriter(fsw))
{
int SinVersion = SinFile.GetSinVersion(br);
long previousDest = 0, previousLength = 0;
int dataStart = SinFile.GetDataStart(br);
br.BaseStream.Position = dataStart;
for (int i = 0; i < bihs.Count; i++)
{
SinFile.BlockInfoHeader bih = bihs[i];
if (previousDest + previousLength < bih.dataDest)
{
FillFF(fsw, (previousDest + previousLength), (bih.dataDest - previousDest - previousLength));
}
if (SinVersion != 2)
{
br.BaseStream.Position = dataStart + bih.dataStart;
}
fsw.Position = bih.dataDest;
if (SinFile.isCompressed(bih))
{
DecompressAndCopy(br, bw, bih);
}
else
{
CopyBytes(br, bw, bih.dataLength);
}
previousDest = bih.dataDest;
previousLength = SinFile.isCompressed(bih) ? bih.destLength : bih.dataLength;
if (showProgress)
{
sender.ReportProgress((int)((float)i / bihs.Count * 100));
}
}
long finallength = SinFile.GetFinalLength(fsw);
if (finallength > previousDest + previousLength)
{
FillFF(fsw, (previousDest + previousLength), (finallength - previousDest - previousLength));
}
if (showProgress)
{
sender.ReportProgress(100);
}
}
}
public static void ExtractSin(BackgroundWorker sender, string sinfile, string outfile, bool log = true)
{
using (FileStream stream = new FileStream(sinfile, FileMode.Open, FileAccess.Read))
using (BinaryReader br = new BinaryReader(stream))
{
if (log)
{
Logger.WriteLog("Verifying extracted Sin File");
}
;
if (!SinFile.VerifySin(br))
{
sender.CancelAsync();
return;
}
List <SinFile.BlockInfoHeader> bihs = null;
int SinVer = SinFile.GetSinVersion(br);
switch (SinVer)
{
case 2:
bihs = SinFileV2.GetBIHs(br);
break;
case 3:
bihs = SinFileV3.GetBIHs(br);
break;
}
if (log)
{
Logger.WriteLog("Extracting image from Sin File " + Path.GetFileName(sinfile));
}
SinExtract.ExtractSinData(sender, br, bihs, outfile, log);
}
}
private static void DecompressAndCopy(BinaryReader _in, BinaryWriter _out, SinFile.BlockInfoHeader bih)
{
if (bih.blockSize != bih.destLength)
throw new Exception("This decompression was unexpected");
byte[] compressed = new byte[bih.dataLength];
_in.Read(compressed, 0, compressed.Length);
byte[] decompressed = LZ4.LZ4Codec.Decode(compressed, 0, compressed.Length, Convert.ToInt32(bih.blockSize));
_out.Write(decompressed, 0, decompressed.Length);
}
