public PEFFile(string aFileName)
: base(aFileName)
{
byte a = mFileReader.ReadByte();
byte b = mFileReader.ReadByte();
bool fileIsLittleEndian;
if (a == b && b == 'I')
{
fileIsLittleEndian = true;
}
else
if (a == b && b == 'M')
{
fileIsLittleEndian = false;
}
else
{
throw new FileLoadException("Could not determine file endianess. Is this a proper TIFF/PEF file?", aFileName);
}
mEndianSwap = fileIsLittleEndian != BitConverter.IsLittleEndian;
ushort magicNumber = ReadUI2();
if (magicNumber != 42)
{
throw new FileLoadException("This is not a valid TIFF/PEF file: Magic number is not 42.", aFileName);
}
uint offsetToFirstIFD = ReadUI4();
mFile.Seek(offsetToFirstIFD, SeekOrigin.Begin);
List <ImageFileDirectory> ifds = new List <ImageFileDirectory>();
while (true)
{
ImageFileDirectory ifd = new ImageFileDirectory(this);
ifds.Add(ifd);
uint offsetToNext = ReadUI4();
if (offsetToNext == 0)
{
break;
}
Seek(offsetToNext, System.IO.SeekOrigin.Begin);
}
//Raw Data:
ImageFileDirectory raw = ifds[0];
IFDExif exif = raw.GetEntry <IFDExif>();
mISO = exif.GetEntry <ExifEntry.ExifISOSpeedRatings>().Value;
mBitDepth = raw.GetEntry <IFDBitsPerSample>().Value;
ExifEntry.ExifMakerNote makernote = exif.GetEntry <ExifEntry.ExifMakerNote>();
mBayerPattern = exif.GetEntry <ExifEntry.ExifCFAPattern>().Value;
mBayerWidth = exif.GetEntry <ExifEntry.ExifCFAPattern>().xCount;
mBayerHeight = exif.GetEntry <ExifEntry.ExifCFAPattern>().yCount;
MNHuffmanTable huffmanTable = makernote.Value.GetEntry <MNHuffmanTable>();
mWhiteLevel = makernote.Value.GetEntry <MNWhiteLevel>();
mWhitePoint = makernote.Value.GetEntry <MNWhitePoint>();
mBlackPoint = makernote.Value.GetEntry <MNBlackPoint>();
mScaling = makernote.Value.GetEntry <MNDataScaling>();
mWidth = (int)raw.GetEntry <IFDImageWidth>().Value;
mHeight = (int)raw.GetEntry <IFDImageLength>().Value;
uint offset = raw.GetEntry <IFDStripOffsets>().Value[0];
Seek(offset, SeekOrigin.Begin);
mRawImage = new ushort[mHeight, mWidth];
int[,] vpred = new int[2, 2];
int[] hpred = new int[2];
unsafe
{
fixed(ushort *huff = huffmanTable.Value)
{
getbithuff(-1, null);
for (int row = 0; row < mHeight; row++)
{
for (int col = 0; col < mWidth; col++)
{
int diff = ljpeg_diff(huff);
if (col < 2)
{
hpred[col] = vpred[row & 1, col] += diff;
}
else
{
hpred[col & 1] += diff;
}
mRawImage[row, col] = (ushort)hpred[col & 1];
}
}
}
}
}
public PEFFile(string aFileName, bool HeaderOnly)
: base(aFileName)
{
byte a = mFileReader.ReadByte();
byte b = mFileReader.ReadByte();
bool fileIsLittleEndian;
if (a == b && b == 'I')
{
fileIsLittleEndian = true;
}
else
if (a == b && b == 'M')
{
fileIsLittleEndian = false;
}
else
{
throw new FileLoadException("Could not determine file endianess. Is this a proper TIFF/PEF file?", aFileName);
}
mEndianSwap = fileIsLittleEndian != BitConverter.IsLittleEndian;
ushort magicNumber = ReadUI2();
if (magicNumber != 42)
{
throw new FileLoadException("This is not a valid TIFF/PEF file: Magic number is not 42.", aFileName);
}
uint offsetToFirstIFD = ReadUI4();
mFile.Seek(offsetToFirstIFD, SeekOrigin.Begin);
List <ImageFileDirectory> ifds = new List <ImageFileDirectory>();
while (true)
{
ImageFileDirectory ifd = new ImageFileDirectory(this);
ifds.Add(ifd);
uint offsetToNext = ReadUI4();
if (offsetToNext == 0)
{
break;
}
Seek(offsetToNext, System.IO.SeekOrigin.Begin);
}
//Raw Data:
ImageFileDirectory raw = ifds[0];
IFDExif exif = raw.GetEntry <IFDExif>();
mISO = exif.GetEntry <ExifEntry.ExifISOSpeedRatings>().Value;
mBitDepth = raw.GetEntry <IFDBitsPerSample>().Value;
ExifEntry.ExifMakerNote makernote = exif.GetEntry <ExifEntry.ExifMakerNote>();
mBayerPattern = exif.GetEntry <ExifEntry.ExifCFAPattern>().Value;
mBayerWidth = exif.GetEntry <ExifEntry.ExifCFAPattern>().xCount;
mBayerHeight = exif.GetEntry <ExifEntry.ExifCFAPattern>().yCount;
MNHuffmanTable huffmanTable = makernote.Value.GetEntry <MNHuffmanTable>();
mWhiteLevel = makernote.Value.GetEntry <MNWhiteLevel>();
mWhitePoint = makernote.Value.GetEntry <MNWhitePoint>();
mBlackPoint = makernote.Value.GetEntry <MNBlackPoint>();
mScaling = makernote.Value.GetEntry <MNDataScaling>();
mWidth = (int)raw.GetEntry <IFDImageWidth>().Value;
mHeight = (int)raw.GetEntry <IFDImageLength>().Value;
uint offset = raw.GetEntry <IFDStripOffsets>().Value[0];
}
