private static string GetExifString(Tiff.ImageDirectory directory, Tiff.TagId id)
{
if (directory == null)
{
return(null);
}
Tiff.DirectoryEntry entry = directory.Lookup(id);
if (entry == null)
{
return(null);
}
return(entry.ValueAsString [0]);
}
private static double GetExifRational(Tiff.ImageDirectory directory, Tiff.TagId id)
{
if (directory == null)
{
return(0);
}
Tiff.DirectoryEntry entry = directory.Lookup(id);
if (entry == null)
{
return(-1);
}
return(entry.RationalValue [0].Value);
}
public ImageLoader (ImageDirectory directory)
{
width = directory.Lookup (TagId.ImageWidth).ValueAsLong [0];
length = directory.Lookup (TagId.ImageLength).ValueAsLong [0];
bps = directory.Lookup (TagId.BitsPerSample).ValueAsLong;
compression = (Compression) directory.Lookup (TagId.Compression).ValueAsLong [0];
interpretation = (PhotometricInterpretation) directory.Lookup (TagId.PhotometricInterpretation).ValueAsLong [0];
offsets = directory.Lookup (TagId.StripOffsets).ValueAsLong;
strip_byte_counts = directory.Lookup (TagId.StripByteCounts).ValueAsLong;
rows_per_strip = directory.Lookup (TagId.RowsPerStrip).ValueAsLong [0];
if (interpretation !=
}
private void AddExifProperties(JpegHeader header)
{
Tiff.Header ifd = header.GetExifHeader();
if (ifd == null)
{
return;
}
//ifd.Dump ("foo"); // Uncomment to debug
string str;
Tiff.DirectoryEntry entry;
// Add IFD 0 properies
str = GetExifString(ifd.Directory, Tiff.TagId.Model);
AddProperty(Beagle.Property.New("exif:Model", str));
str = GetExifString(ifd.Directory, Tiff.TagId.ImageDescription);
AddProperty(Beagle.Property.New("exif:ImageDescription", str));
try {
entry = ifd.Directory.Lookup(Tiff.TagId.DateTime);
if (entry != null)
{
// Assume datetime stored in the images are local times
AddProperty(Beagle.Property.NewDate("exif:DateTime", entry.ValueAsDate.ToUniversalTime()));
}
} catch (FormatException) {
Logger.Log.Debug("EXIF DateTime '{0}' is invalid.", GetExifString(ifd.Directory, Tiff.TagId.DateTime));
} catch (ArgumentOutOfRangeException) {
Logger.Log.Debug("EXIF DateTime '{0}' is invalid.", GetExifString(ifd.Directory, Tiff.TagId.DateTime));
}
str = GetExifString(ifd.Directory, Tiff.TagId.Copyright);
AddProperty(Beagle.Property.New("dc:rights", str));
// Add IFD 1 properties
Tiff.SubdirectoryEntry subdir = (Tiff.SubdirectoryEntry)ifd.Directory.Lookup(Tiff.TagId.ExifIfdPointer);
if (subdir == null)
{
return;
}
Tiff.ImageDirectory exif = subdir.Directory [0];
if (exif == null)
{
return;
}
entry = exif.Lookup(Tiff.TagId.UserComment);
if (entry != null)
{
AddProperty(Beagle.Property.New("exif:UserComment", entry.UserCommentValue));
}
uint val = 0;
entry = exif.Lookup(Tiff.TagId.PixelXDimension);
if (entry != null)
{
val = entry.ValueAsLong [0];
}
if (val > 0)
{
Width = (int)val;
AddProperty(Beagle.Property.NewUnsearched("exif:PixelXDimension", val));
}
val = 0;
entry = exif.Lookup(Tiff.TagId.PixelYDimension);
if (entry != null)
{
val = entry.ValueAsLong [0];
}
if (val > 0)
{
Height = (int)val;
AddProperty(Beagle.Property.NewUnsearched("exif:PixelYDimension", val));
}
str = GetExifString(exif, Tiff.TagId.ISOSpeedRatings);
AddProperty(Beagle.Property.NewUnsearched("exif:ISOSpeedRatings", str));
str = GetExifString(exif, Tiff.TagId.ShutterSpeedValue);
AddProperty(Beagle.Property.NewUnsearched("exif:ShutterSpeedValue", str));
str = GetExifString(exif, Tiff.TagId.ExposureTime);
if (!String.IsNullOrEmpty(str))
{
AddProperty(Beagle.Property.NewUnsearched("exif:ExposureTime", str + " sec."));
}
double rational_val;
rational_val = GetExifRational(exif, Tiff.TagId.FNumber);
if (rational_val > 0)
{
AddProperty(Beagle.Property.NewUnsearched("exif:FNumber", String.Format("f/{0}", rational_val)));
}
rational_val = GetExifRational(exif, Tiff.TagId.ApertureValue);
if (rational_val > 0)
{
AddProperty(Beagle.Property.NewUnsearched("exif:ApertureValue", rational_val));
}
rational_val = GetExifRational(exif, Tiff.TagId.FocalLength);
if (rational_val > 0)
{
AddProperty(Beagle.Property.NewUnsearched("exif:FocalLength", String.Format("{0} mm", rational_val)));
}
entry = exif.Lookup(Tiff.TagId.Flash);
if (entry != null)
{
ushort flash = entry.ShortValue [0];
AddProperty(Beagle.Property.NewUnsearched("exif:Flash", GetFlashString(flash)));
}
}