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