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];
}
}
}
}
}
private ImageFileDirectory SetMembers()
{
//Raw Data:
ImageFileDirectory raw = mIfds[0];
IFDExif exif = raw.GetEntry <IFDExif>();
mISO = exif.GetEntry <ExifISOSpeedRatings>().Value;
mExposureTime = exif.GetEntry <ExifExposureTime>().Value;
mRecordingDate = exif.GetEntry <ExifDateTimeDigitized>().Value;
mBitDepth = raw.GetEntry <IFDBitsPerSample>().Value[0];
ExifMakerNote makernote = exif.GetEntry <ExifMakerNote>();
//needed to decompress image data:
mHhuffmanTable = makernote.Value.GetEntry <MNHuffmanTable>();
ExifCFAPattern.BayerColor[] bayer = exif.GetEntry <ExifCFAPattern>().Value;
mBayerPattern = new BayerColor[bayer.Length];
for (int i = 0; i < bayer.Length; i++)
{
mBayerPattern[i] = (BayerColor)(int)bayer[i];
}
MNWhiteLevel whiteLevel = makernote.Value.GetEntry <MNWhiteLevel>();
MNWhitePoint whitePoint = makernote.Value.GetEntry <MNWhitePoint>();
MNBlackPoint blackPoint = makernote.Value.GetEntry <MNBlackPoint>();
MNDataScaling scaling = makernote.Value.GetEntry <MNDataScaling>();
float whiteLevelAll = (float)Math.Pow(2, mBitDepth);
if (whiteLevel != null)
{
whiteLevelAll = whiteLevel.Value;
}
mBlackLevel = new float[3];
if (blackPoint != null)
{
//only one value for all colors
if (blackPoint.Value.Length == 1)
{
mBlackLevel[0] = (float)blackPoint.Value[0];
mBlackLevel[1] = (float)blackPoint.Value[0];
mBlackLevel[2] = (float)blackPoint.Value[0];
}
//values per color channel
if (blackPoint.Value.Length == 3)
{
mBlackLevel[0] = (float)blackPoint.Value[0];
mBlackLevel[1] = (float)blackPoint.Value[1];
mBlackLevel[2] = (float)blackPoint.Value[2];
}
//values per color bayer pattern
if (blackPoint.Value.Length == 4)
{
//red
int indexR = -1;
for (int i = 0; i < mBayerPattern.Length; i++)
{
if (mBayerPattern[i] == BayerColor.Red)
{
indexR = i;
break;
}
}
mBlackLevel[0] = (float)blackPoint.Value[indexR];
//blue
int indexB = -1;
for (int i = 0; i < mBayerPattern.Length; i++)
{
if (mBayerPattern[i] == BayerColor.Blue)
{
indexB = i;
break;
}
}
mBlackLevel[2] = (float)blackPoint.Value[indexB];
//green, the two remaining indices
int indexG1 = -1, indexG2 = -1;
for (int i = 0; i < mBayerPattern.Length; i++)
{
if (mBayerPattern[i] == BayerColor.Green && indexG1 == -1)
{
indexG1 = i;
}
if (mBayerPattern[i] == BayerColor.Green && indexG1 != -1)
{
indexG2 = i;
}
}
float g1 = (float)blackPoint.Value[indexG1];
float g2 = (float)blackPoint.Value[indexG2];
mBlackLevel[1] = Math.Max(g1, g2); //well, one could distinguish the two greens, but what for?
}
}
mWhiteLevel = new float[] { whiteLevelAll, whiteLevelAll, whiteLevelAll };
mWhiteLevel[0] -= mBlackLevel[0];
mWhiteLevel[1] -= mBlackLevel[1];
mWhiteLevel[2] -= mBlackLevel[2];
float scale = scaling.Value;
mWhiteBalance = new float[] { whitePoint.Value[0] / scale, whitePoint.Value[1] / scale, whitePoint.Value[3] / scale };
if (makernote.Value.GetEntry <MNLevelInfo>() != null)
{
mRollAngle = makernote.Value.GetEntry <MNLevelInfo>().Value.RollAngle;
mRollAnglePresent = true;
}
mWidth = (int)raw.GetEntry <IFDImageWidth>().Value;
mHeight = (int)raw.GetEntry <IFDImageLength>().Value;
//look for orientation tag.
if (raw.GetEntry <IFDOrientation>() != null)
{
mOrientation = new DNGOrientation(raw.GetEntry <IFDOrientation>().Value);
}
else
{
//no tag found, use default
mOrientation = new DNGOrientation(DNGOrientation.Orientation.Normal);
}
//we always crop at least two pixels because of our algos...
mCropLeft = 2;
mCropTop = 2;
mCroppedWidth = mWidth - 4;
mCroppedHeight = mHeight - 4;
mMake = raw.GetEntry <IFDMake>().Value;
mUniqueModelName = raw.GetEntry <IFDModel>().Value;
//missing data, like noise model, crop area, etc..., must be loaded afterwards!
double[] colorMatrix = new double[] { 1, 0, 0, 0, 1, 0, 0, 0, 1 };
mColorSpec = new DNGColorSpec(colorMatrix, colorMatrix, IFDDNGCalibrationIlluminant.Illuminant.D50, IFDDNGCalibrationIlluminant.Illuminant.D50, mWhiteBalance);
return(raw);
}
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];
}
