private void ReadTags(PropertyItem[] pitems)
{
Encoding ascii = Encoding.ASCII;
SupportedTags supportedTags = new SupportedTags();
_tags = new Dictionary <int, ExifTag>();
foreach (PropertyItem pitem in pitems)
{
ExifTag tag = (ExifTag)supportedTags[pitem.Id];
if (tag == null)
{
continue;
}
string value = "";
if (pitem.Type == 0x1)
{
#region BYTE (8-bit unsigned int)
if (pitem.Value.Length == 4)
{
value = "Version " + pitem.Value[0] + "." + pitem.Value[1];
}
else if (pitem.Id == 0x5 && pitem.Value[0] == 0)
{
value = "Sea level";
}
else
{
value = pitem.Value[0].ToString();
}
#endregion
}
else if (pitem.Type == 0x2)
{
#region ASCII (8 bit ASCII code)
value = ascii.GetString(pitem.Value).Trim('\0');
if (pitem.Id == 0x1 || pitem.Id == 0x13)
{
if (value == "N")
{
value = "North latitude";
}
else if (value == "S")
{
value = "South latitude";
}
else
{
value = "reserved";
}
}
if (pitem.Id == 0x3 || pitem.Id == 0x15)
{
if (value == "E")
{
value = "East longitude";
}
else if (value == "W")
{
value = "West longitude";
}
else
{
value = "reserved";
}
}
if (pitem.Id == 0x9)
{
if (value == "A")
{
value = "Measurement in progress";
}
else if (value == "V")
{
value = "Measurement Interoperability";
}
else
{
value = "reserved";
}
}
if (pitem.Id == 0xA)
{
if (value == "2")
{
value = "2-dimensional measurement";
}
else if (value == "3")
{
value = "3-dimensional measurement";
}
else
{
value = "reserved";
}
}
if (pitem.Id == 0xC || pitem.Id == 0x19)
{
if (value == "K")
{
value = "Kilometers per hour";
}
else if (value == "M")
{
value = "Miles per hour";
}
else if (value == "N")
{
value = "Knots";
}
else
{
value = "reserved";
}
}
if (pitem.Id == 0xE || pitem.Id == 0x10 || pitem.Id == 0x17)
{
if (value == "T")
{
value = "True direction";
}
else if (value == "M")
{
value = "Magnetic direction";
}
else
{
value = "reserved";
}
}
#endregion
}
else if (pitem.Type == 0x3)
{
#region 3 = SHORT (16-bit unsigned int)
UInt16 uintval = BitConverter.ToUInt16(pitem.Value, 0);
// orientation // lookup table
switch (pitem.Id)
{
case 0x8827: // ISO speed rating
value = "ISO-" + uintval;
break;
case 0xA217: // sensing method
{
switch (uintval)
{
case 1:
value = "Not defined";
break;
case 2:
value = "One-chip color area sensor";
break;
case 3:
value = "Two-chip color area sensor";
break;
case 4:
value = "Three-chip color area sensor";
break;
case 5:
value = "Color sequential area sensor";
break;
case 7:
value = "Trilinear sensor";
break;
case 8:
value = "Color sequential linear sensor";
break;
default:
value = " reserved";
break;
}
}
break;
case 0x8822: // Exposure program
switch (uintval)
{
case 0:
value = "Not defined";
break;
case 1:
value = "Manual";
break;
case 2:
value = "Normal program";
break;
case 3:
value = "Aperture priority";
break;
case 4:
value = "Shutter priority";
break;
case 5:
value = "Creative program (biased toward depth of field)";
break;
case 6:
value = "Action program (biased toward fast shutter speed)";
break;
case 7:
value = "Portrait mode (for closeup photos with the background out of focus)";
break;
case 8:
value = "Landscape mode (for landscape photos with the background in focus)";
break;
default:
value = "reserved";
break;
}
break;
case 0x9207: // metering mode
switch (uintval)
{
case 0:
value = "unknown";
break;
case 1:
value = "Average";
break;
case 2:
value = "Center Weighted Average";
break;
case 3:
value = "Spot";
break;
case 4:
value = "MultiSpot";
break;
case 5:
value = "Pattern";
break;
case 6:
value = "Partial";
break;
case 255:
value = "Other";
break;
default:
value = "reserved";
break;
}
break;
case 0x9208: // Light source
{
switch (uintval)
{
case 0:
value = "unknown";
break;
case 1:
value = "Daylight";
break;
case 2:
value = "Fluorescent";
break;
case 3:
value = "Tungsten (incandescent light)";
break;
case 4:
value = "Flash";
break;
case 9:
value = "Fine weather";
break;
case 10:
value = "Cloudy weather";
break;
case 11:
value = "Shade";
break;
case 12:
value = "Daylight fluorescent (D 5700 – 7100K)";
break;
case 13:
value = "Day white fluorescent (N 4600 – 5400K)";
break;
case 14:
value = "Cool white fluorescent (W 3900 – 4500K)";
break;
case 15:
value = "White fluorescent (WW 3200 – 3700K)";
break;
case 17:
value = "Standard light A";
break;
case 18:
value = "Standard light B";
break;
case 19:
value = "Standard light C";
break;
case 20:
value = "D55";
break;
case 21:
value = "D65";
break;
case 22:
value = "D75";
break;
case 23:
value = "D50";
break;
case 24:
value = "ISO studio tungsten";
break;
case 255:
value = "ISO studio tungsten";
break;
default:
value = "other light source";
break;
}
}
break;
case 0x9209: // Flash
{
switch (uintval)
{
case 0x0:
value = "Flash did not fire";
break;
case 0x1:
value = "Flash fired";
break;
case 0x5:
value = "Strobe return light not detected";
break;
case 0x7:
value = "Strobe return light detected";
break;
case 0x9:
value = "Flash fired, compulsory flash mode";
break;
case 0xD:
value = "Flash fired, compulsory flash mode, return light not detected";
break;
case 0xF:
value = "Flash fired, compulsory flash mode, return light detected";
break;
case 0x10:
value = "Flash did not fire, compulsory flash mode";
break;
case 0x18:
value = "Flash did not fire, auto mode";
break;
case 0x19:
value = "Flash fired, auto mode";
break;
case 0x1D:
value = "Flash fired, auto mode, return light not detected";
break;
case 0x1F:
value = "Flash fired, auto mode, return light detected";
break;
case 0x20:
value = "No flash function";
break;
case 0x41:
value = "Flash fired, red-eye reduction mode";
break;
case 0x45:
value = "Flash fired, red-eye reduction mode, return light not detected";
break;
case 0x47:
value = "Flash fired, red-eye reduction mode, return light detected";
break;
case 0x49:
value = "Flash fired, compulsory flash mode, red-eye reduction mode";
break;
case 0x4D:
value = "Flash fired, compulsory flash mode, red-eye reduction mode, return light not detected";
break;
case 0x4F:
value = "Flash fired, compulsory flash mode, red-eye reduction mode, return light detected";
break;
case 0x59:
value = "Flash fired, auto mode, red-eye reduction mode";
break;
case 0x5D:
value = "Flash fired, auto mode, return light not detected, red-eye reduction mode";
break;
case 0x5F:
value = "Flash fired, auto mode, return light detected, red-eye reduction mode";
break;
default:
value = "reserved";
break;
}
}
break;
case 0x0128: //ResolutionUnit
{
switch (uintval)
{
case 2:
value = "Inch";
break;
case 3:
value = "Centimeter";
break;
default:
value = "No Unit";
break;
}
}
break;
case 0xA409: // Saturation
{
switch (uintval)
{
case 0:
value = "Normal";
break;
case 1:
value = "Low saturation";
break;
case 2:
value = "High saturation";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0xA40A: // Sharpness
{
switch (uintval)
{
case 0:
value = "Normal";
break;
case 1:
value = "Soft";
break;
case 2:
value = "Hard";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0xA408: // Contrast
{
switch (uintval)
{
case 0:
value = "Normal";
break;
case 1:
value = "Soft";
break;
case 2:
value = "Hard";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0x103: // Compression
{
switch (uintval)
{
case 1:
value = "Uncompressed";
break;
case 6:
value = "JPEG compression (thumbnails only)";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0x106: // PhotometricInterpretation
{
switch (uintval)
{
case 2:
value = "RGB";
break;
case 6:
value = "YCbCr";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0x112: // Orientation
{
switch (uintval)
{
case 1:
value = "0º";
break;
//"The 0th row is at the visual top of the image, and the 0th column is the visual left-hand side."; break;
case 2:
value = "0º Flipped";
break;
//"The 0th row is at the visual top of the image, and the 0th column is the visual right-hand side."; break;
case 3:
value = "180º";
break;
//"The 0th row is at the visual bottom of the image, and the 0th column is the visual right-hand side."; break;
case 4:
value = "180º Flipped";
break;
//"The 0th row is at the visual bottom of the image, and the 0th column is the visual left-hand side."; break;
case 5:
value = "270º Flipped";
break; //"The 0th row is the visual left-hand side of the image, and the 0th column is the visual top."; break;
case 6:
value = "270º";
break;
//"The 0th row is the visual right-hand side of the image, and the 0th column is the visual top."; break;
case 7:
value = "90º Flipped";
break;
//"The 0th row is the visual right-hand side of the image, and the 0th column is the visual bottom."; break;
case 8:
value = "90º";
break;
//"The 0th row is the visual left-hand side of the image, and the 0th column is the visual bottom."; break;
default:
value = "Reserved";
break;
}
}
break;
case 0x213: // YCbCrPositioning
{
switch (uintval)
{
case 1:
value = "centered";
break;
case 6:
value = "co-sited";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0xA001: // ColorSpace
{
switch (uintval)
{
case 1:
value = "sRGB";
break;
case 0xFFFF:
value = "Uncalibrated";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0xA401: // CustomRendered
{
switch (uintval)
{
case 0:
value = "Normal process";
break;
case 1:
value = "Custom process";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0xA402: // ExposureMode
{
switch (uintval)
{
case 0:
value = "Auto exposure";
break;
case 1:
value = "Manual exposure";
break;
case 2:
value = "Auto bracket";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0xA403: // WhiteBalance
{
switch (uintval)
{
case 0:
value = "Auto white balance";
break;
case 1:
value = "Manual white balance";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0xA406: // SceneCaptureType
{
switch (uintval)
{
case 0:
value = "Standard";
break;
case 1:
value = "Landscape";
break;
case 2:
value = "Portrait";
break;
case 3:
value = "Night scene";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0xA40C: // SubjectDistanceRange
{
switch (uintval)
{
case 0:
value = "unknown";
break;
case 1:
value = "Macro";
break;
case 2:
value = "Close view";
break;
case 3:
value = "Distant view";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0x1E: // GPSDifferential
{
switch (uintval)
{
case 0:
value = "Measurement without differential correction";
break;
case 1:
value = "Differential correction applied";
break;
default:
value = "Reserved";
break;
}
}
break;
case 0xA405: // FocalLengthIn35mmFilm
value = uintval + " mm";
break;
default: //
value = uintval.ToString();
break;
}
#endregion
}
else if (pitem.Type == 0x4)
{
#region 4 = LONG (32-bit unsigned int)
value = BitConverter.ToUInt32(pitem.Value, 0).ToString();
#endregion
}
else if (pitem.Type == 0x5)
{
#region 5 = RATIONAL (Two LONGs, unsigned)
URational rat = new URational(pitem.Value);
switch (pitem.Id)
{
case 0x9202: // ApertureValue
value = "F/" + Math.Round(Math.Pow(Math.Sqrt(2), rat.ToDouble()), 2);
break;
case 0x9205: // MaxApertureValue
value = "F/" + Math.Round(Math.Pow(Math.Sqrt(2), rat.ToDouble()), 2);
break;
case 0x920A: // FocalLength
value = rat.ToDouble() + " mm";
break;
case 0x829D: // F-number
value = "F/" + rat.ToDouble();
break;
case 0x11A: // Xresolution
value = rat.ToDouble().ToString();
break;
case 0x11B: // Yresolution
value = rat.ToDouble().ToString();
break;
case 0x829A: // ExposureTime
value = rat + " sec";
break;
case 0x2: // GPSLatitude
value = new GPSRational(pitem.Value).ToString();
break;
case 0x4: // GPSLongitude
value = new GPSRational(pitem.Value).ToString();
break;
case 0x6: // GPSAltitude
value = rat.ToDouble() + " meters";
break;
case 0xA404: // Digital Zoom Ratio
value = rat.ToDouble().ToString();
if (value == "0")
{
value = "none";
}
break;
case 0xB: // GPSDOP
value = rat.ToDouble().ToString();
break;
case 0xD: // GPSSpeed
value = rat.ToDouble().ToString();
break;
case 0xF: // GPSTrack
value = rat.ToDouble().ToString();
break;
case 0x11: // GPSImgDir
value = rat.ToDouble().ToString();
break;
case 0x14: // GPSDestLatitude
value = new GPSRational(pitem.Value).ToString();
break;
case 0x16: // GPSDestLongitude
value = new GPSRational(pitem.Value).ToString();
break;
case 0x18: // GPSDestBearing
value = rat.ToDouble().ToString();
break;
case 0x1A: // GPSDestDistance
value = rat.ToDouble().ToString();
break;
case 0x7: // GPSTimeStamp
value = new GPSRational(pitem.Value).ToString(":");
break;
default:
value = rat.ToString();
break;
}
#endregion
}
else if (pitem.Type == 0x7)
{
#region UNDEFINED (8-bit)
switch (pitem.Id)
{
case 0xA300: //FileSource
{
if (pitem.Value[0] == 3)
{
value = "DSC";
}
else
{
value = "reserved";
}
break;
}
case 0xA301: //SceneType
if (pitem.Value[0] == 1)
{
value = "A directly photographed image";
}
else
{
value = "reserved";
}
break;
case 0x9000: // Exif Version
value = ascii.GetString(pitem.Value).Trim('\0');
break;
case 0xA000: // Flashpix Version
value = ascii.GetString(pitem.Value).Trim('\0');
if (value == "0100")
{
value = "Flashpix Format Version 1.0";
}
else
{
value = "reserved";
}
break;
case 0x9101: //ComponentsConfiguration
value = GetComponentsConfig(pitem.Value);
break;
case 0x927C: //MakerNote
value = ascii.GetString(pitem.Value).Trim('\0');
break;
case 0x9286: //UserComment
value = ascii.GetString(pitem.Value).Trim('\0');
break;
case 0x1B: //GPS Processing Method
value = ascii.GetString(pitem.Value).Trim('\0');
break;
case 0x1C: //GPS Area Info
value = ascii.GetString(pitem.Value).Trim('\0');
break;
default:
value = "-";
break;
}
#endregion
}
else if (pitem.Type == 0x9)
{
#region 9 = SLONG (32-bit int)
value = BitConverter.ToInt32(pitem.Value, 0).ToString();
#endregion
}
else if (pitem.Type == 0xA)
{
#region 10 = SRATIONAL (Two SLONGs, signed)
Rational rat = new Rational(pitem.Value);
switch (pitem.Id)
{
case 0x9201: // ShutterSpeedValue
value = "1/" + Math.Round(Math.Pow(2, rat.ToDouble()), 2);
break;
case 0x9203: // BrightnessValue
value = Math.Round(rat.ToDouble(), 4).ToString();
break;
case 0x9204: // ExposureBiasValue
value = Math.Round(rat.ToDouble(), 2) + " eV";
break;
default:
value = rat.ToString();
break;
}
#endregion
}
tag.Value = value;
_tags.Add(tag.Id, tag);
}
}