public ExifSignedRationalArray(ExifTag <SignedRational[]> tag)
: base(tag)
{
}
public ExifString(ExifTag <string> tag)
: base(tag)
{
}
public ExifNumber(ExifTag <Number> tag)
: base(tag)
{
}
/// <summary>
/// Creates a new <see cref="ExifValue"/>
/// </summary>
/// <param name="tag">The tag.</param>
/// <param name="value">The value.</param>
/// <returns>
/// The <see cref="ExifValue"/>.
/// </returns>
/// <exception cref="NotSupportedException">
/// Thrown if the tag is not supported.
/// </exception>
internal static ExifValue Create(ExifTag tag, object value)
{
Guard.IsFalse(tag == ExifTag.Unknown, nameof(tag), "Invalid Tag");
switch (tag)
{
case ExifTag.ImageDescription:
case ExifTag.Make:
case ExifTag.Model:
case ExifTag.Software:
case ExifTag.DateTime:
case ExifTag.Artist:
case ExifTag.HostComputer:
case ExifTag.Copyright:
case ExifTag.DocumentName:
case ExifTag.PageName:
case ExifTag.InkNames:
case ExifTag.TargetPrinter:
case ExifTag.ImageID:
case ExifTag.MDLabName:
case ExifTag.MDSampleInfo:
case ExifTag.MDPrepDate:
case ExifTag.MDPrepTime:
case ExifTag.MDFileUnits:
case ExifTag.SEMInfo:
case ExifTag.SpectralSensitivity:
case ExifTag.DateTimeOriginal:
case ExifTag.DateTimeDigitized:
case ExifTag.SubsecTime:
case ExifTag.SubsecTimeOriginal:
case ExifTag.SubsecTimeDigitized:
case ExifTag.FaxSubaddress:
case ExifTag.OffsetTime:
case ExifTag.OffsetTimeOriginal:
case ExifTag.OffsetTimeDigitized:
case ExifTag.SecurityClassification:
case ExifTag.ImageHistory:
case ExifTag.ImageUniqueID:
case ExifTag.OwnerName:
case ExifTag.SerialNumber:
case ExifTag.LensMake:
case ExifTag.LensModel:
case ExifTag.LensSerialNumber:
case ExifTag.GDALMetadata:
case ExifTag.GDALNoData:
case ExifTag.GPSLatitudeRef:
case ExifTag.GPSLongitudeRef:
case ExifTag.GPSSatellites:
case ExifTag.GPSStatus:
case ExifTag.GPSMeasureMode:
case ExifTag.GPSSpeedRef:
case ExifTag.GPSTrackRef:
case ExifTag.GPSImgDirectionRef:
case ExifTag.GPSMapDatum:
case ExifTag.GPSDestLatitudeRef:
case ExifTag.GPSDestLongitudeRef:
case ExifTag.GPSDestBearingRef:
case ExifTag.GPSDestDistanceRef:
case ExifTag.GPSDateStamp:
return(new ExifValue(tag, ExifDataType.Ascii, value, true));
case ExifTag.ClipPath:
case ExifTag.VersionYear:
case ExifTag.XMP:
case ExifTag.CFAPattern2:
case ExifTag.TIFFEPStandardID:
case ExifTag.XPTitle:
case ExifTag.XPComment:
case ExifTag.XPAuthor:
case ExifTag.XPKeywords:
case ExifTag.XPSubject:
case ExifTag.GPSVersionID:
return(new ExifValue(tag, ExifDataType.Byte, value, true));
case ExifTag.FaxProfile:
case ExifTag.ModeNumber:
case ExifTag.GPSAltitudeRef:
return(new ExifValue(tag, ExifDataType.Byte, value, false));
case ExifTag.FreeOffsets:
case ExifTag.FreeByteCounts:
case ExifTag.ColorResponseUnit:
case ExifTag.TileOffsets:
case ExifTag.SMinSampleValue:
case ExifTag.SMaxSampleValue:
case ExifTag.JPEGQTables:
case ExifTag.JPEGDCTables:
case ExifTag.JPEGACTables:
case ExifTag.StripRowCounts:
case ExifTag.IntergraphRegisters:
case ExifTag.TimeZoneOffset:
return(new ExifValue(tag, ExifDataType.Long, value, true));
case ExifTag.SubfileType:
case ExifTag.SubIFDOffset:
case ExifTag.GPSIFDOffset:
case ExifTag.T4Options:
case ExifTag.T6Options:
case ExifTag.XClipPathUnits:
case ExifTag.YClipPathUnits:
case ExifTag.ProfileType:
case ExifTag.CodingMethods:
case ExifTag.T82ptions:
case ExifTag.JPEGInterchangeFormat:
case ExifTag.JPEGInterchangeFormatLength:
case ExifTag.MDFileTag:
case ExifTag.StandardOutputSensitivity:
case ExifTag.RecommendedExposureIndex:
case ExifTag.ISOSpeed:
case ExifTag.ISOSpeedLatitudeyyy:
case ExifTag.ISOSpeedLatitudezzz:
case ExifTag.FaxRecvParams:
case ExifTag.FaxRecvTime:
case ExifTag.ImageNumber:
return(new ExifValue(tag, ExifDataType.Long, value, false));
case ExifTag.WhitePoint:
case ExifTag.PrimaryChromaticities:
case ExifTag.YCbCrCoefficients:
case ExifTag.ReferenceBlackWhite:
case ExifTag.PixelScale:
case ExifTag.IntergraphMatrix:
case ExifTag.ModelTiePoint:
case ExifTag.ModelTransform:
case ExifTag.GPSLatitude:
case ExifTag.GPSLongitude:
case ExifTag.GPSTimestamp:
case ExifTag.GPSDestLatitude:
case ExifTag.GPSDestLongitude:
return(new ExifValue(tag, ExifDataType.Rational, value, true));
case ExifTag.XPosition:
case ExifTag.YPosition:
case ExifTag.XResolution:
case ExifTag.YResolution:
case ExifTag.BatteryLevel:
case ExifTag.ExposureTime:
case ExifTag.FNumber:
case ExifTag.MDScalePixel:
case ExifTag.CompressedBitsPerPixel:
case ExifTag.ApertureValue:
case ExifTag.MaxApertureValue:
case ExifTag.SubjectDistance:
case ExifTag.FocalLength:
case ExifTag.FlashEnergy2:
case ExifTag.FocalPlaneXResolution2:
case ExifTag.FocalPlaneYResolution2:
case ExifTag.ExposureIndex2:
case ExifTag.Humidity:
case ExifTag.Pressure:
case ExifTag.Acceleration:
case ExifTag.FlashEnergy:
case ExifTag.FocalPlaneXResolution:
case ExifTag.FocalPlaneYResolution:
case ExifTag.ExposureIndex:
case ExifTag.DigitalZoomRatio:
case ExifTag.LensInfo:
case ExifTag.GPSAltitude:
case ExifTag.GPSDOP:
case ExifTag.GPSSpeed:
case ExifTag.GPSTrack:
case ExifTag.GPSImgDirection:
case ExifTag.GPSDestBearing:
case ExifTag.GPSDestDistance:
return(new ExifValue(tag, ExifDataType.Rational, value, false));
case ExifTag.BitsPerSample:
case ExifTag.MinSampleValue:
case ExifTag.MaxSampleValue:
case ExifTag.GrayResponseCurve:
case ExifTag.ColorMap:
case ExifTag.ExtraSamples:
case ExifTag.PageNumber:
case ExifTag.TransferFunction:
case ExifTag.Predictor:
case ExifTag.HalftoneHints:
case ExifTag.SampleFormat:
case ExifTag.TransferRange:
case ExifTag.DefaultImageColor:
case ExifTag.JPEGLosslessPredictors:
case ExifTag.JPEGPointTransforms:
case ExifTag.YCbCrSubsampling:
case ExifTag.CFARepeatPatternDim:
case ExifTag.IntergraphPacketData:
case ExifTag.ISOSpeedRatings:
case ExifTag.SubjectArea:
case ExifTag.SubjectLocation:
return(new ExifValue(tag, ExifDataType.Short, value, true));
case ExifTag.OldSubfileType:
case ExifTag.Compression:
case ExifTag.PhotometricInterpretation:
case ExifTag.Thresholding:
case ExifTag.CellWidth:
case ExifTag.CellLength:
case ExifTag.FillOrder:
case ExifTag.Orientation:
case ExifTag.SamplesPerPixel:
case ExifTag.PlanarConfiguration:
case ExifTag.GrayResponseUnit:
case ExifTag.ResolutionUnit:
case ExifTag.CleanFaxData:
case ExifTag.InkSet:
case ExifTag.NumberOfInks:
case ExifTag.DotRange:
case ExifTag.Indexed:
case ExifTag.OPIProxy:
case ExifTag.JPEGProc:
case ExifTag.JPEGRestartInterval:
case ExifTag.YCbCrPositioning:
case ExifTag.Rating:
case ExifTag.RatingPercent:
case ExifTag.ExposureProgram:
case ExifTag.Interlace:
case ExifTag.SelfTimerMode:
case ExifTag.SensitivityType:
case ExifTag.MeteringMode:
case ExifTag.LightSource:
case ExifTag.FocalPlaneResolutionUnit2:
case ExifTag.SensingMethod2:
case ExifTag.Flash:
case ExifTag.ColorSpace:
case ExifTag.FocalPlaneResolutionUnit:
case ExifTag.SensingMethod:
case ExifTag.CustomRendered:
case ExifTag.ExposureMode:
case ExifTag.WhiteBalance:
case ExifTag.FocalLengthIn35mmFilm:
case ExifTag.SceneCaptureType:
case ExifTag.GainControl:
case ExifTag.Contrast:
case ExifTag.Saturation:
case ExifTag.Sharpness:
case ExifTag.SubjectDistanceRange:
case ExifTag.GPSDifferential:
return(new ExifValue(tag, ExifDataType.Short, value, false));
case ExifTag.Decode:
return(new ExifValue(tag, ExifDataType.SignedRational, value, true));
case ExifTag.ShutterSpeedValue:
case ExifTag.BrightnessValue:
case ExifTag.ExposureBiasValue:
case ExifTag.AmbientTemperature:
case ExifTag.WaterDepth:
case ExifTag.CameraElevationAngle:
return(new ExifValue(tag, ExifDataType.SignedRational, value, false));
case ExifTag.JPEGTables:
case ExifTag.OECF:
case ExifTag.ExifVersion:
case ExifTag.ComponentsConfiguration:
case ExifTag.MakerNote:
case ExifTag.UserComment:
case ExifTag.FlashpixVersion:
case ExifTag.SpatialFrequencyResponse:
case ExifTag.SpatialFrequencyResponse2:
case ExifTag.Noise:
case ExifTag.CFAPattern:
case ExifTag.DeviceSettingDescription:
case ExifTag.ImageSourceData:
case ExifTag.GPSProcessingMethod:
case ExifTag.GPSAreaInformation:
return(new ExifValue(tag, ExifDataType.Undefined, value, true));
case ExifTag.FileSource:
case ExifTag.SceneType:
return(new ExifValue(tag, ExifDataType.Undefined, value, false));
case ExifTag.StripOffsets:
case ExifTag.TileByteCounts:
case ExifTag.ImageLayer:
return(CreateNumber(tag, value, true));
case ExifTag.ImageWidth:
case ExifTag.ImageLength:
case ExifTag.TileWidth:
case ExifTag.TileLength:
case ExifTag.BadFaxLines:
case ExifTag.ConsecutiveBadFaxLines:
case ExifTag.PixelXDimension:
case ExifTag.PixelYDimension:
return(CreateNumber(tag, value, false));
default:
throw new NotSupportedException();
}
}
public ExifByteArray(ExifTag <byte[]> tag, ExifDataType dataType)
: base(tag) => this.DataType = dataType;
public ExifRationalArray(ExifTag <Rational[]> tag)
: base(tag)
{
}
internal ExifSignedRational(ExifTag <SignedRational> tag)
: base(tag)
{
}
protected ExifArrayValue(ExifTag <TValueType[]> tag)
: base(tag)
{
}
public ExifLong(ExifTag <uint> tag)
: base(tag)
{
}
private bool TryReadValue(out ExifValue exifValue)
{
// 2 | 2 | 4 | 4
// tag | type | count | value offset
if (this.RemainingLength < 12)
{
exifValue = default;
return(false);
}
ExifTag tag = this.ToEnum(this.ReadUInt16(), ExifTag.Unknown);
uint type = this.ReadUInt16();
// Ensure that the data type is valid
if (type == 0 || type > 12)
{
exifValue = new ExifValue(tag, ExifDataType.Unknown, null, false);
return(true);
}
var dataType = (ExifDataType)type;
object value;
uint numberOfComponents = this.ReadUInt32();
// Issue #132: ExifDataType == Undefined is treated like a byte array.
// If numberOfComponents == 0 this value can only be handled as an inline value and must fallback to 4 (bytes)
if (dataType == ExifDataType.Undefined && numberOfComponents == 0)
{
numberOfComponents = 4;
}
uint size = numberOfComponents * ExifValue.GetSize(dataType);
this.TryReadSpan(4, out ReadOnlySpan <byte> offsetBuffer);
if (size > 4)
{
int oldIndex = this.position;
uint newIndex = this.ConvertToUInt32(offsetBuffer);
// Ensure that the new index does not overrun the data
if (newIndex > int.MaxValue)
{
this.AddInvalidTag(tag);
exifValue = default;
return(false);
}
this.position = (int)newIndex;
if (this.RemainingLength < size)
{
this.AddInvalidTag(tag);
this.position = oldIndex;
exifValue = default;
return(false);
}
this.TryReadSpan((int)size, out ReadOnlySpan <byte> dataBuffer);
value = this.ConvertValue(dataType, dataBuffer, numberOfComponents);
this.position = oldIndex;
}
else
{
value = this.ConvertValue(dataType, offsetBuffer, numberOfComponents);
}
exifValue = new ExifValue(tag, dataType, value, isArray: value != null && numberOfComponents != 1);
return(true);
}
private void AddInvalidTag(ExifTag tag) => (this.invalidTags ?? (this.invalidTags = new List <ExifTag>())).Add(tag);
/// <summary> /// Sets the value of the specified tag. /// </summary> /// <param name="tag">The tag of the exif value.</param> /// <param name="value">The value.</param> /// <typeparam name="TValueType">The data type of the tag.</typeparam> public void SetValue <TValueType>(ExifTag <TValueType> tag, TValueType value) => this.SetValueInternal(tag, value);
/// <summary>
/// Returns the value with the specified tag.
/// </summary>
/// <param name="tag">The tag of the exif value.</param>
/// <returns>The value with the specified tag.</returns>
/// <typeparam name="TValueType">The data type of the tag.</typeparam>
public IExifValue <TValueType> GetValue <TValueType>(ExifTag <TValueType> tag)
{
IExifValue value = this.GetValueInternal(tag);
return(value is null ? null : (IExifValue <TValueType>)value);
}
public ExifEncodedString(ExifTag <EncodedString> tag)
: base(tag)
{
}
public ExifShort(ExifTag <ushort> tag)
: base(tag)
{
}
public ExifNumberArray(ExifTag <Number[]> tag)
: base(tag)
{
}
public ExifByte(ExifTag <byte> tag, ExifDataType dataType)
: base(tag) => this.DataType = dataType;
private static IExifValue GetOffsetValue(List <IExifValue> ifdValues, List <IExifValue> values, ExifTag offset)
{
int index = -1;
for (int i = 0; i < ifdValues.Count; i++)
{
if (ifdValues[i].Tag == offset)
{
index = i;
}
}
if (values.Count > 0)
{
if (index != -1)
{
return(ifdValues[index]);
}
ExifValue result = ExifValues.Create(offset);
ifdValues.Add(result);
return(result);
}
else if (index != -1)
{
ifdValues.RemoveAt(index);
}
return(null);
}
public ExifLong8(ExifTag <ulong> tag)
: base(tag)
{
}
public ExifShortArray(ExifTag <ushort[]> tag)
: base(tag)
{
}
public ExifDouble(ExifTag <double> tag)
: base(tag)
{
}
public ExifRational(ExifTag <Rational> tag)
: base(tag)
{
}