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package exif
type FieldName string
// UnknownPrefix is used as the first part of field names for decoded tags for
// which there is no known/supported EXIF field.
const UnknownPrefix = "UnknownTag_"
// Primary EXIF fields
const (
ImageWidth FieldName = "ImageWidth"
ImageLength FieldName = "ImageLength" // Image height called Length by EXIF spec
BitsPerSample FieldName = "BitsPerSample"
Compression FieldName = "Compression"
PhotometricInterpretation FieldName = "PhotometricInterpretation"
Orientation FieldName = "Orientation"
SamplesPerPixel FieldName = "SamplesPerPixel"
PlanarConfiguration FieldName = "PlanarConfiguration"
YCbCrSubSampling FieldName = "YCbCrSubSampling"
YCbCrPositioning FieldName = "YCbCrPositioning"
XResolution FieldName = "XResolution"
YResolution FieldName = "YResolution"
ResolutionUnit FieldName = "ResolutionUnit"
DateTime FieldName = "DateTime"
ImageDescription FieldName = "ImageDescription"
Make FieldName = "Make"
Model FieldName = "Model"
Software FieldName = "Software"
Artist FieldName = "Artist"
Copyright FieldName = "Copyright"
ExifIFDPointer FieldName = "ExifIFDPointer"
GPSInfoIFDPointer FieldName = "GPSInfoIFDPointer"
InteroperabilityIFDPointer FieldName = "InteroperabilityIFDPointer"
ExifVersion FieldName = "ExifVersion"
FlashpixVersion FieldName = "FlashpixVersion"
ColorSpace FieldName = "ColorSpace"
ComponentsConfiguration FieldName = "ComponentsConfiguration"
CompressedBitsPerPixel FieldName = "CompressedBitsPerPixel"
PixelXDimension FieldName = "PixelXDimension"
PixelYDimension FieldName = "PixelYDimension"
MakerNote FieldName = "MakerNote"
UserComment FieldName = "UserComment"
RelatedSoundFile FieldName = "RelatedSoundFile"
DateTimeOriginal FieldName = "DateTimeOriginal"
DateTimeDigitized FieldName = "DateTimeDigitized"
SubSecTime FieldName = "SubSecTime"
SubSecTimeOriginal FieldName = "SubSecTimeOriginal"
SubSecTimeDigitized FieldName = "SubSecTimeDigitized"
ImageUniqueID FieldName = "ImageUniqueID"
ExposureTime FieldName = "ExposureTime"
FNumber FieldName = "FNumber"
ExposureProgram FieldName = "ExposureProgram"
SpectralSensitivity FieldName = "SpectralSensitivity"
ISOSpeedRatings FieldName = "ISOSpeedRatings"
OECF FieldName = "OECF"
ShutterSpeedValue FieldName = "ShutterSpeedValue"
ApertureValue FieldName = "ApertureValue"
BrightnessValue FieldName = "BrightnessValue"
ExposureBiasValue FieldName = "ExposureBiasValue"
MaxApertureValue FieldName = "MaxApertureValue"
SubjectDistance FieldName = "SubjectDistance"
MeteringMode FieldName = "MeteringMode"
LightSource FieldName = "LightSource"
Flash FieldName = "Flash"
FocalLength FieldName = "FocalLength"
SubjectArea FieldName = "SubjectArea"
FlashEnergy FieldName = "FlashEnergy"
SpatialFrequencyResponse FieldName = "SpatialFrequencyResponse"
FocalPlaneXResolution FieldName = "FocalPlaneXResolution"
FocalPlaneYResolution FieldName = "FocalPlaneYResolution"
FocalPlaneResolutionUnit FieldName = "FocalPlaneResolutionUnit"
SubjectLocation FieldName = "SubjectLocation"
ExposureIndex FieldName = "ExposureIndex"
SensingMethod FieldName = "SensingMethod"
FileSource FieldName = "FileSource"
SceneType FieldName = "SceneType"
CFAPattern FieldName = "CFAPattern"
CustomRendered FieldName = "CustomRendered"
ExposureMode FieldName = "ExposureMode"
WhiteBalance FieldName = "WhiteBalance"
DigitalZoomRatio FieldName = "DigitalZoomRatio"
FocalLengthIn35mmFilm FieldName = "FocalLengthIn35mmFilm"
SceneCaptureType FieldName = "SceneCaptureType"
GainControl FieldName = "GainControl"
Contrast FieldName = "Contrast"
Saturation FieldName = "Saturation"
Sharpness FieldName = "Sharpness"
DeviceSettingDescription FieldName = "DeviceSettingDescription"
SubjectDistanceRange FieldName = "SubjectDistanceRange"
LensMake FieldName = "LensMake"
LensModel FieldName = "LensModel"
)
// Windows-specific tags
const (
XPTitle FieldName = "XPTitle"
XPComment FieldName = "XPComment"
XPAuthor FieldName = "XPAuthor"
XPKeywords FieldName = "XPKeywords"
XPSubject FieldName = "XPSubject"
)
// thumbnail fields
const (
ThumbJPEGInterchangeFormat FieldName = "ThumbJPEGInterchangeFormat" // offset to thumb jpeg SOI
ThumbJPEGInterchangeFormatLength FieldName = "ThumbJPEGInterchangeFormatLength" // byte length of thumb
)
// GPS fields
const (
GPSVersionID FieldName = "GPSVersionID"
GPSLatitudeRef FieldName = "GPSLatitudeRef"
GPSLatitude FieldName = "GPSLatitude"
GPSLongitudeRef FieldName = "GPSLongitudeRef"
GPSLongitude FieldName = "GPSLongitude"
GPSAltitudeRef FieldName = "GPSAltitudeRef"
GPSAltitude FieldName = "GPSAltitude"
GPSTimeStamp FieldName = "GPSTimeStamp"
GPSSatelites FieldName = "GPSSatelites"
GPSStatus FieldName = "GPSStatus"
GPSMeasureMode FieldName = "GPSMeasureMode"
GPSDOP FieldName = "GPSDOP"
GPSSpeedRef FieldName = "GPSSpeedRef"
GPSSpeed FieldName = "GPSSpeed"
GPSTrackRef FieldName = "GPSTrackRef"
GPSTrack FieldName = "GPSTrack"
GPSImgDirectionRef FieldName = "GPSImgDirectionRef"
GPSImgDirection FieldName = "GPSImgDirection"
GPSMapDatum FieldName = "GPSMapDatum"
GPSDestLatitudeRef FieldName = "GPSDestLatitudeRef"
GPSDestLatitude FieldName = "GPSDestLatitude"
GPSDestLongitudeRef FieldName = "GPSDestLongitudeRef"
GPSDestLongitude FieldName = "GPSDestLongitude"
GPSDestBearingRef FieldName = "GPSDestBearingRef"
GPSDestBearing FieldName = "GPSDestBearing"
GPSDestDistanceRef FieldName = "GPSDestDistanceRef"
GPSDestDistance FieldName = "GPSDestDistance"
GPSProcessingMethod FieldName = "GPSProcessingMethod"
GPSAreaInformation FieldName = "GPSAreaInformation"
GPSDateStamp FieldName = "GPSDateStamp"
GPSDifferential FieldName = "GPSDifferential"
)
// interoperability fields
const (
InteroperabilityIndex FieldName = "InteroperabilityIndex"
)
var exifFields = map[uint16]FieldName{
/////////////////////////////////////
////////// IFD 0 ////////////////////
/////////////////////////////////////
// image data structure for the thumbnail
0x0100: ImageWidth,
0x0101: ImageLength,
0x0102: BitsPerSample,
0x0103: Compression,
0x0106: PhotometricInterpretation,
0x0112: Orientation,
0x0115: SamplesPerPixel,
0x011C: PlanarConfiguration,
0x0212: YCbCrSubSampling,
0x0213: YCbCrPositioning,
0x011A: XResolution,
0x011B: YResolution,
0x0128: ResolutionUnit,
// Other tags
0x0132: DateTime,
0x010E: ImageDescription,
0x010F: Make,
0x0110: Model,
0x0131: Software,
0x013B: Artist,
0x8298: Copyright,
// Windows-specific tags
0x9c9b: XPTitle,
0x9c9c: XPComment,
0x9c9d: XPAuthor,
0x9c9e: XPKeywords,
0x9c9f: XPSubject,
// private tags
exifPointer: ExifIFDPointer,
/////////////////////////////////////
////////// Exif sub IFD /////////////
/////////////////////////////////////
gpsPointer: GPSInfoIFDPointer,
interopPointer: InteroperabilityIFDPointer,
0x9000: ExifVersion,
0xA000: FlashpixVersion,
0xA001: ColorSpace,
0x9101: ComponentsConfiguration,
0x9102: CompressedBitsPerPixel,
0xA002: PixelXDimension,
0xA003: PixelYDimension,
0x927C: MakerNote,
0x9286: UserComment,
0xA004: RelatedSoundFile,
0x9003: DateTimeOriginal,
0x9004: DateTimeDigitized,
0x9290: SubSecTime,
0x9291: SubSecTimeOriginal,
0x9292: SubSecTimeDigitized,
0xA420: ImageUniqueID,
// picture conditions
0x829A: ExposureTime,
0x829D: FNumber,
0x8822: ExposureProgram,
0x8824: SpectralSensitivity,
0x8827: ISOSpeedRatings,
0x8828: OECF,
0x9201: ShutterSpeedValue,
0x9202: ApertureValue,
0x9203: BrightnessValue,
0x9204: ExposureBiasValue,
0x9205: MaxApertureValue,
0x9206: SubjectDistance,
0x9207: MeteringMode,
0x9208: LightSource,
0x9209: Flash,
0x920A: FocalLength,
0x9214: SubjectArea,
0xA20B: FlashEnergy,
0xA20C: SpatialFrequencyResponse,
0xA20E: FocalPlaneXResolution,
0xA20F: FocalPlaneYResolution,
0xA210: FocalPlaneResolutionUnit,
0xA214: SubjectLocation,
0xA215: ExposureIndex,
0xA217: SensingMethod,
0xA300: FileSource,
0xA301: SceneType,
0xA302: CFAPattern,
0xA401: CustomRendered,
0xA402: ExposureMode,
0xA403: WhiteBalance,
0xA404: DigitalZoomRatio,
0xA405: FocalLengthIn35mmFilm,
0xA406: SceneCaptureType,
0xA407: GainControl,
0xA408: Contrast,
0xA409: Saturation,
0xA40A: Sharpness,
0xA40B: DeviceSettingDescription,
0xA40C: SubjectDistanceRange,
0xA433: LensMake,
0xA434: LensModel,
}
var gpsFields = map[uint16]FieldName{
/////////////////////////////////////
//// GPS sub-IFD ////////////////////
/////////////////////////////////////
0x0: GPSVersionID,
0x1: GPSLatitudeRef,
0x2: GPSLatitude,
0x3: GPSLongitudeRef,
0x4: GPSLongitude,
0x5: GPSAltitudeRef,
0x6: GPSAltitude,
0x7: GPSTimeStamp,
0x8: GPSSatelites,
0x9: GPSStatus,
0xA: GPSMeasureMode,
0xB: GPSDOP,
0xC: GPSSpeedRef,
0xD: GPSSpeed,
0xE: GPSTrackRef,
0xF: GPSTrack,
0x10: GPSImgDirectionRef,
0x11: GPSImgDirection,
0x12: GPSMapDatum,
0x13: GPSDestLatitudeRef,
0x14: GPSDestLatitude,
0x15: GPSDestLongitudeRef,
0x16: GPSDestLongitude,
0x17: GPSDestBearingRef,
0x18: GPSDestBearing,
0x19: GPSDestDistanceRef,
0x1A: GPSDestDistance,
0x1B: GPSProcessingMethod,
0x1C: GPSAreaInformation,
0x1D: GPSDateStamp,
0x1E: GPSDifferential,
}
var interopFields = map[uint16]FieldName{
/////////////////////////////////////
//// Interoperability sub-IFD ///////
/////////////////////////////////////
0x1: InteroperabilityIndex,
}
var thumbnailFields = map[uint16]FieldName{
0x0201: ThumbJPEGInterchangeFormat,
0x0202: ThumbJPEGInterchangeFormatLength,
}
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