private void resetClasses()
{
embeder = null;
extractor = null;
GC.Collect(0, GCCollectionMode.Forced);
GC.Collect(1, GCCollectionMode.Forced);
GC.Collect(2, GCCollectionMode.Forced);
}
public async Task ReadAndExtractVideoStream(string path, IProgress <long> reportExtractedData, long SizeToExtract, bool isRGB16)
{
getFileStamps(path);
ErrorEncountered = false;
FileStream readVid = new FileStream(path, FileMode.Open, FileAccess.Read);
using (readVid)
{
int fID = 4;
long seekOffset = 8;
readVid.Seek(seekOffset, SeekOrigin.Begin);
byte[] fourcc = new byte[fID];
readVid.Read(fourcc, 0, 4);
seekOffset += 4;
int chunkSize = 0;
int id = 0;
int hops = 0;
embedsize2 = 0;
if (SizeToExtract % 2 != 0 && flag[0] == 0)
{
embedsize2 = SizeToExtract + 1;
}
else
{
embedsize2 = SizeToExtract;
}
if (FouCC(fourcc) == 1)
{
extractor = null;
extractor = new LSBExtractorClass(embedsize2, isRGB16);
while (seekOffset != readVid.Length)
{
hops++;
if (stopOperationFlag)
{
break;
}
readVid.Seek(seekOffset, SeekOrigin.Begin);
readVid.Read(fourcc, 0, 4);
seekOffset += 4;
id = FouCC(fourcc);
if (id == 2)
{
readVid.Seek(seekOffset, SeekOrigin.Begin);
readVid.Read(fourcc, 0, 4);
seekOffset += 4;
chunkSize = getEquivalentDecimal(fourcc);
readVid.Seek(seekOffset, SeekOrigin.Begin);
readVid.Read(fourcc, 0, 4);
id = FouCC(fourcc);
if (id == 9)
{
seekOffset += chunkSize;
}
else if (id == 3)
{
seekOffset += 4;
readVid.Seek(seekOffset, SeekOrigin.Begin);
readVid.Read(fourcc, 0, 4);
seekOffset += 4;
id = FouCC(fourcc);
if (id == 4)
{
readVid.Seek(seekOffset, SeekOrigin.Begin);
readVid.Read(fourcc, 0, 4);
seekOffset += 4 + getEquivalentDecimal(fourcc);
}
else if (id == 5)
{
if (extractor.getExtracted() < embedsize2)
{
readVid.Seek(seekOffset, SeekOrigin.Begin);
readVid.Read(fourcc, 0, 4);
seekOffset += 4;
chunkSize = getEquivalentDecimal(fourcc);
byte[] container = new byte[chunkSize];
readVid.Read(container, 0, chunkSize);
processChunkExtract(container);
reportExtractedData.Report(getExtracted());
seekOffset += chunkSize;
}
else
{
break;
}
}
}
}
else if (id == 4 || id == 7 || id == 6)
{
readVid.Seek(seekOffset, SeekOrigin.Begin);
readVid.Read(fourcc, 0, 4);
seekOffset += 4 + getEquivalentDecimal(fourcc);
}
else if (id == 5)
{
if (extractor.getExtracted() < embedsize2)
{
readVid.Seek(seekOffset, SeekOrigin.Begin);
readVid.Read(fourcc, 0, 4);
seekOffset += 4;
chunkSize = getEquivalentDecimal(fourcc);
byte[] container = new byte[chunkSize];
readVid.Read(container, 0, chunkSize);
processChunkExtract(container);
reportExtractedData.Report(getExtracted());
seekOffset += chunkSize;
}
else
{
break;
}
}
else if (id == 8)
{
seekOffset += 8;
}
else if (id == 10)
{
readVid.Seek(seekOffset, SeekOrigin.Begin);
readVid.Read(fourcc, 0, 4);
chunkSize = getEquivalentDecimal(fourcc);
seekOffset += 4 + chunkSize;
}
else
{
break;
}
if (hops % 2 == 0)
{
await Task.Delay(100);
}
}
}
else
{
ErrorEncountered = true;
MessageBox.Show("Unable to read the video file. File maybe corrupted", "Cuttlefish", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
setFileStamps(path);
readVid.Dispose();
}
