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);
}
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);
}
}
}
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);
}
//roughly taken from flashtool
public static List<SinFile.BlockInfoHeader> GetBIHs(BinaryReader br)
{
br.BaseStream.Position = 11;
int BIHLength = Utility.ReadIntBigEndian(br);
if (BIHLength % _BIHSize != 0)
throw new Exception("Woot m8, v2 too spooky");
List<SinFile.BlockInfoHeader> bihs = new List<SinFile.BlockInfoHeader>();
for (int i = 0; i < (BIHLength / _BIHSize); i++)
{
SinFile.BlockInfoHeader bih = new SinFile.BlockInfoHeader();
bih.dataDest = Utility.ReadIntBigEndian(br);
bih.dataLength = Utility.ReadIntBigEndian(br);
bihs.Add(bih);
br.BaseStream.Position += 0x21; //SHA256 and 1 unknown byte
}
return bihs;
}
//roughly taken from flashtool
public static List <SinFile.BlockInfoHeader> GetBIHs(BinaryReader br)
{
br.BaseStream.Position = 11;
int BIHLength = Utility.ReadIntBigEndian(br);
if (BIHLength % _BIHSize != 0)
{
throw new Exception("Woot m8, v2 too spooky");
}
List <SinFile.BlockInfoHeader> bihs = new List <SinFile.BlockInfoHeader>();
for (int i = 0; i < (BIHLength / _BIHSize); i++)
{
SinFile.BlockInfoHeader bih = new SinFile.BlockInfoHeader();
bih.dataDest = Utility.ReadIntBigEndian(br);
bih.dataLength = Utility.ReadIntBigEndian(br);
bihs.Add(bih);
br.BaseStream.Position += 0x21; //SHA256 and 1 unknown byte
}
return(bihs);
}
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;
}
