public long recoverSegment(string file, Program p)
{
long recLength = 0;
try
{
int dhtID = 1;
Huffman.switchHuffman(dhtID);
Console.WriteLine("HuffmanID" + dhtID);
if (p.startDecoding())
{
//first dht is ok
return(p.finalizeDecoding());
}
Program p2to7 = new Program(file);
Huffman.switchHuffman(2);
int maxdhtID = Huffman.maxDhtID;
while (!p2to7.startDecoding() && dhtID < 8)
{
dhtID++;
Console.WriteLine("HuffmanID" + dhtID);
Huffman.switchHuffman(dhtID);
p = new Program(file);
}
// if all is consumed, then, return 1st dht (the standard table)
recLength = (dhtID == 8) ? p.finalizeDecoding() : p2to7.finalizeDecoding();
}
catch (Exception e) { }
return(recLength);
}
/*
* Procedure 1- Recover single jpeg encoded data.
*
*/
public Tuple <String, String> procedure_1(String rawPath)
{
String outFile = "" + rawPath + ".jpg";
Console.WriteLine("Running Procedure 1");
if (!File.Exists(rawPath))
{
String msg = "Error - File does not exists.";
return(Tuple.Create(outFile, msg));
}
Procedures main = new Procedures();
Huffman.switchHuffman(1);
Stopwatch watch = Stopwatch.StartNew();
//String rawPath = @"C:\Users\Ahmad\Desktop\QCRIInternship\Code\jpeg-carver-csharp-master\Dataset\Original\deagon_test_4kib";
//Check if file is jpeg or not
FileStream tempFileStream = new FileStream(rawPath, FileMode.Open);
//Reading stream changes position, retain original
long cpoint = tempFileStream.Position;
bool isJpeg = preCheck.isJpeg(tempFileStream);
tempFileStream.Position = cpoint;
Console.WriteLine("Is Jpeg File?: " + isJpeg);
//Check if jpeg partial headers exist
utils.recoverHuffmanHdr(tempFileStream);
tempFileStream.Close();
Program p = new Program(rawPath);
utils.recoverSegment(rawPath, p);
//Console.WriteLine(" Hell Yeah!!");
watch.Stop();
Console.WriteLine(watch.Elapsed);
//Console.ReadLine();
return(Tuple.Create(outFile, "Success"));
}
