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package
v0.0.15 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Apr 3, 2023 License: MIT Imports: 25 Imported by: 0

Documentation

Index

Examples

Constants

View Source 
const (
	ExifDateTime       = "2006:01:02 15:04:05"
	ExifDateTimeOffset = "2006:01:02 15:04:05 -07:00"
)

Exif Time formats

View Source 
const (
	IptcShortDate      = "20060102"
	IptcLongDateOffset = "20060102150405-0700"
	IptcLongDate       = "20060102150405"
	IptcTime           = "150405-0700"
)

Iptc date & time format

Variables

View Source 
var (
	ErrExifNoData        = errors.New("No Exif data")
	ErrExifTagNotFound   = errors.New("Ifd tag not found")
	ErrExifValueNotFound = errors.New("Ifd value not found")
	ErrExifParseTag      = errors.New("Exif tag could not be parsed")
	ErrExifUndefinedType = errors.New("Tag type undefined")
)

Exif errors

View Source 
var (
	ErrNoIptc            = errors.New("No IPTC data")
	ErrIptcTagNotFound   = errors.New("Iptc tag not found")
	ErrIptcTagValue      = errors.New("Iptc tag value not corret")
	ErrIptcUndefinedType = errors.New("Could not parse ")
)

Iptc related errors

View Source 
var ErrNoXmp = errors.New("No XMP data")

ErrNoXmp when a jpeg image does not contain any xmp data

View Source 
var ErrParseImage = errors.New("Could not parse image")

ErrParseImage if a file or byte slice could not be parsed as a jpeg image

View Source 
var ExifTagDescriptions = map[ExifIndexTag]ExifTagDesc{}/* 419 elements not displayed */

Exif Tag Descriptions

View Source 
var IFDPaths = map[ExifIndex]string{
	RootIFD:      "IFD",
	ExifIFD:      "IFD/Exif",
	GpsIFD:       "IFD/GPSInfo",
	InteropIFD:   "IFD/Exif/Iop",
	ThumbnailIFD: "IFD1",
}
View Source 
var IptcRecordName = map[IptcRecord]string{
	IPTCPostObjectData: "IPTCPostObjectData",
	IPTCPreObjectData:  "IPTCPreObjectData",
	IPTCApplication:    "IPTCApplication",
	IPTCEnvelope:       "IPTCEnvelope",
	IPTCFotoStation:    "IPTCFotoStation",
	IPTCNewsPhoto:      "IPTCNewsPhoto",
	IPTCObjectData:     "IPTCObjectData",
}
View Source 
var IptcTagDescriptions = map[IptcRecordTag]IptcTagDesc{}/* 116 elements not displayed */

IPTC Tag Descriptions

Functions

func DecodeIptc 

func DecodeIptc(r io.Reader) (map[IptcRecordTag]IptcRecordDataset, error)

DecodeIptc according to https://iptc.org/std/IIM/4.2/specification/IIMV4.2.pdf

func EncodeIptc 

func EncodeIptc(w io.Writer, recs map[IptcRecordTag]IptcRecordDataset) error

EncodeIptc according to https://iptc.org/std/IIM/4.2/specification/IIMV4.2.pdf

func ExifTagName 

func ExifTagName(index ExifIndex, tag ExifTag) string

ExifTagName returns the common name of specific ExifTag

func ExifValueIsAllowed 

func ExifValueIsAllowed(index ExifIndex, tag ExifTag, value interface{}) bool

ExifValueIsAllowed checks if an ExifTag value is ok to use. Most tags dont have any specific values defined. see (https://exiftool.org/TagNames/EXIF.html)

func ExifValueString 

func ExifValueString(index ExifIndex, tag ExifTag, value interface{}) string

ExifValueString returns the common name of specific ExifTag value. E.g. "No Flash" for value 0 for the FlashTag. If no mapping is found returns "undefined"

func ExifValueStringErr 

func ExifValueStringErr(index ExifIndex, tag ExifTag, value interface{}) (string, error)

ExifValueStringErr returns the common name of the ExifTag value or an error, either ErrExifValueNotFound or ErrExifUndefinedType

func IptcTagName 

func IptcTagName(record IptcRecord, tag IptcTag) string

IptcTagName returns the common name for a tag in record

func ParseIptcJpeg 

func ParseIptcJpeg(sl *jpegstructure.SegmentList) (map[IptcRecordTag]IptcRecordDataset, error)

ParseIptcJpeg extracts iptc data from a jpeg segment list. Returns ErrNoIptc if the segments dont contain any IPTC data

Types

type ExifData 

type ExifData struct {
	// contains filtered or unexported fields
}

ExifData holds the underlying IfdIndex

func NewExifData 

func NewExifData(segments *jpegstructure.SegmentList) (*ExifData, error)

NewExifData creates an ExifData from a jpeg segment list. Returns ErrExifNoData if the segment list did not contain any exif data

func (*ExifData) GetImageDescription added in v0.0.10 

func (ed *ExifData) GetImageDescription() string

GetImageDescription returns IFD_ImaageDescription or "" if the tag was not set

func (*ExifData) GetUserComment added in v0.0.10 

func (ed *ExifData) GetUserComment() string

GetUserComment returns ExifIFD_UserComment as a string or "" if there was an error getting the comment. The comment is assumed to be encoded using exifundefined.Tag9286UserComment

func (*ExifData) GpsInfo 

func (ed *ExifData) GpsInfo() (*exif.GpsInfo, error)

GpsInfo returns this Exifs gpsinfo or an error

func (*ExifData) HasIfd 

func (ed *ExifData) HasIfd(index ExifIndex) bool

HasIfd checks if the specified index exists in this Ifd

func (*ExifData) Ifd 

func (ed *ExifData) Ifd(index ExifIndex) *exif.Ifd

Ifd retrieves the given index or nil if it does not exist

func (*ExifData) IsEmpty 

func (ed *ExifData) IsEmpty() bool

IsEmpty returns true if the underlying IfdIndex is nil

func (*ExifData) Scan 

func (ed *ExifData) Scan(ifdIndex ExifIndex, tagId ExifTag, dest interface{}) error

Scan reads the specific tag from index into dest

func (*ExifData) ScanExifDate 

func (ed *ExifData) ScanExifDate(dateTag ExifDate, dest *time.Time) error

ScanExifDate reads the given dateTag into dest

func (*ExifData) ScanIfdExif 

func (ed *ExifData) ScanIfdExif(tag ExifTag, dest interface{}) error

ScanIfdExif scans tag from ExifIFD into dest

func (*ExifData) ScanIfdIop 

func (ed *ExifData) ScanIfdIop(tagId ExifTag, dest interface{}) error

ScanIfdIop scans tag from InteropIFD into dest

func (*ExifData) ScanIfdRoot 

func (ed *ExifData) ScanIfdRoot(tagId ExifTag, dest interface{}) error

ScanIfdRoot scans tag from RootIFD into dest

Example 
md, err := NewMetaDataFromFile("../assets/leica.jpg")
if err != nil {
	fmt.Printf("Could not open file: %v\n", err)
	return
}
cameraMake := ""
err = md.Exif().ScanIfdRoot(IFD_Make, &cameraMake)
if err != nil {
	fmt.Printf("Could not scan ifd tag: %v\n", err)
	return
}
fmt.Printf("Make: %s\n", cameraMake)

Output:

Make: LEICA CAMERA AG

func (*ExifData) ScanIfdThumbnail 

func (ed *ExifData) ScanIfdThumbnail(tagId ExifTag, dest interface{}) error

ScanIfdThumbnail scans tag from ThumbnailIFD into dest

func (*ExifData) String 

func (ed *ExifData) String() string

type ExifDate 

type ExifDate int

ExifDate type 

const (
	OriginalDate ExifDate = iota
	ModifyDate
	DigitizedDate
)

ExifDates found in the specification

type ExifEditor 

type ExifEditor struct {
	// contains filtered or unexported fields
}

ExifEditor holds an IfdBuilder

func NewExifEditor 

func NewExifEditor(sl *jpegstructure.SegmentList) (*ExifEditor, error)

NewExifEditor from a jpeg segment list

func NewExifEditorEmpty 

func NewExifEditorEmpty(dirty bool) (*ExifEditor, error)

NewExifEditorEmpty create a new empty editor and sets the dirty flag

func (*ExifEditor) Clear 

func (ee *ExifEditor) Clear(dirty bool) error

Clear this editor and sets the dirty flag

func (*ExifEditor) IfdBuilder 

func (ee *ExifEditor) IfdBuilder() (*exif.IfdBuilder, bool)

IfdBuilder returns the underlying IfdBuilder. If it was changed it will also set the IFD Software tag.

func (ExifEditor) IsDirty 

func (ee ExifEditor) IsDirty() bool

IsDirty if this editor has made any edits

func (ExifEditor) IsEmpty 

func (ee ExifEditor) IsEmpty() bool

IsEmpty returns true if the IfdBuilder contains no data

func (*ExifEditor) SetDate 

func (ee *ExifEditor) SetDate(dateTag ExifDate, time time.Time) error

SetDate sets the specified dateTag to time. Both the DateTime and corresponding offest will be set

func (*ExifEditor) SetDirty 

func (ee *ExifEditor) SetDirty()

SetDirty force this editor to be marked as dirty

func (*ExifEditor) SetIfdExifTag 

func (ee *ExifEditor) SetIfdExifTag(id ExifTag, value interface{}) error

SetIfdExifTag sets the ExifIFD tag id to value

func (*ExifEditor) SetIfdRootTag 

func (ee *ExifEditor) SetIfdRootTag(id ExifTag, value interface{}) error

SetIfdRootTag set RootIFD tag id to value

func (*ExifEditor) SetImageDescription 

func (ee *ExifEditor) SetImageDescription(description string) error

SetImageDescription sets IFD_ImageDescription to description

func (*ExifEditor) SetUserComment 

func (ee *ExifEditor) SetUserComment(comment string) error

SetUserComment sets ExifIFD_UserComment to comment using exifundefined.Tag9286UserComment. The comment will be Unicode encoded

type ExifIndex 

type ExifIndex int
const (
	RootIFD ExifIndex = iota
	ExifIFD
	GpsIFD
	InteropIFD
	ThumbnailIFD
)

type ExifIndexTag 

type ExifIndexTag struct {
	Index ExifIndex
	Tag   ExifTag
}

type ExifTag 

type ExifTag uint16
const (
	IFD_ProcessingSoftware            ExifTag = 0x000b
	IFD_SubfileType                   ExifTag = 0x00fe
	IFD_OldSubfileType                ExifTag = 0x00ff
	IFD_ImageWidth                    ExifTag = 0x0100
	IFD_ImageHeight                   ExifTag = 0x0101
	IFD_BitsPerSample                 ExifTag = 0x0102
	IFD_Compression                   ExifTag = 0x0103
	IFD_PhotometricInterpretation     ExifTag = 0x0106
	IFD_Thresholding                  ExifTag = 0x0107
	IFD_CellWidth                     ExifTag = 0x0108
	IFD_CellLength                    ExifTag = 0x0109
	IFD_FillOrder                     ExifTag = 0x010a
	IFD_DocumentName                  ExifTag = 0x010d
	IFD_ImageDescription              ExifTag = 0x010e
	IFD_Make                          ExifTag = 0x010f
	IFD_Model                         ExifTag = 0x0110
	IFD_StripOffsets                  ExifTag = 0x0111
	IFD_Orientation                   ExifTag = 0x0112
	IFD_SamplesPerPixel               ExifTag = 0x0115
	IFD_RowsPerStrip                  ExifTag = 0x0116
	IFD_StripByteCounts               ExifTag = 0x0117
	IFD_MinSampleValue                ExifTag = 0x0118
	IFD_MaxSampleValue                ExifTag = 0x0119
	IFD_XResolution                   ExifTag = 0x011a
	IFD_YResolution                   ExifTag = 0x011b
	IFD_PlanarConfiguration           ExifTag = 0x011c
	IFD_PageName                      ExifTag = 0x011d
	IFD_XPosition                     ExifTag = 0x011e
	IFD_YPosition                     ExifTag = 0x011f
	IFD_GrayResponseUnit              ExifTag = 0x0122
	IFD_ResolutionUnit                ExifTag = 0x0128
	IFD_PageNumber                    ExifTag = 0x0129
	IFD_TransferFunction              ExifTag = 0x012d
	IFD_Software                      ExifTag = 0x0131
	IFD_ModifyDate                    ExifTag = 0x0132
	IFD_Artist                        ExifTag = 0x013b
	IFD_HostComputer                  ExifTag = 0x013c
	IFD_Predictor                     ExifTag = 0x013d
	IFD_WhitePoint                    ExifTag = 0x013e
	IFD_PrimaryChromaticities         ExifTag = 0x013f
	IFD_HalftoneHints                 ExifTag = 0x0141
	IFD_TileWidth                     ExifTag = 0x0142
	IFD_TileLength                    ExifTag = 0x0143
	IFD_SubIFDs                       ExifTag = 0x014a
	IFD_InkSet                        ExifTag = 0x014c
	IFD_TargetPrinter                 ExifTag = 0x0151
	IFD_SampleFormat                  ExifTag = 0x0153
	IFD_ThumbnailOffset               ExifTag = 0x0201
	IFD_ThumbnailLength               ExifTag = 0x0202
	IFD_YCbCrCoefficients             ExifTag = 0x0211
	IFD_YCbCrSubSampling              ExifTag = 0x0212
	IFD_YCbCrPositioning              ExifTag = 0x0213
	IFD_ReferenceBlackWhite           ExifTag = 0x0214
	IFD_ApplicationNotes              ExifTag = 0x02bc
	IFD_Rating                        ExifTag = 0x4746
	IFD_RatingPercent                 ExifTag = 0x4749
	IFD_VignettingCorrection          ExifTag = 0x7031
	IFD_VignettingCorrParams          ExifTag = 0x7032
	IFD_ChromaticAberrationCorrection ExifTag = 0x7034
	IFD_ChromaticAberrationCorrParams ExifTag = 0x7035
	IFD_DistortionCorrection          ExifTag = 0x7036
	IFD_DistortionCorrParams          ExifTag = 0x7037
	IFD_SonyCropTopLeft               ExifTag = 0x74c7
	IFD_SonyCropSize                  ExifTag = 0x74c8
	IFD_CFARepeatPatternDim           ExifTag = 0x828d
	IFD_CFAPattern2                   ExifTag = 0x828e
	IFD_Copyright                     ExifTag = 0x8298
	IFD_PixelScale                    ExifTag = 0x830e
	IFD_IPTCNAA                       ExifTag = 0x83bb
	IFD_IntergraphMatrix              ExifTag = 0x8480
	IFD_ModelTiePoint                 ExifTag = 0x8482
	IFD_SEMInfo                       ExifTag = 0x8546
	IFD_ModelTransform                ExifTag = 0x85d8
	IFD_PhotoshopSettings             ExifTag = 0x8649
	IFD_ExifOffset                    ExifTag = 0x8769
	IFD_ICC_Profile                   ExifTag = 0x8773
	IFD_GeoTiffDirectory              ExifTag = 0x87af
	IFD_GeoTiffDoubleParams           ExifTag = 0x87b0
	IFD_GeoTiffAsciiParams            ExifTag = 0x87b1
	IFD_GPSInfo                       ExifTag = 0x8825
	IFD_ImageSourceData               ExifTag = 0x935c
	IFD_XPTitle                       ExifTag = 0x9c9b
	IFD_XPComment                     ExifTag = 0x9c9c
	IFD_XPAuthor                      ExifTag = 0x9c9d
	IFD_XPKeywords                    ExifTag = 0x9c9e
	IFD_XPSubject                     ExifTag = 0x9c9f
	IFD_GDALMetadata                  ExifTag = 0xa480
	IFD_GDALNoData                    ExifTag = 0xa481
	IFD_PrintIM                       ExifTag = 0xc4a5
	IFD_DNGVersion                    ExifTag = 0xc612
	IFD_DNGBackwardVersion            ExifTag = 0xc613
	IFD_UniqueCameraModel             ExifTag = 0xc614
	IFD_LocalizedCameraModel          ExifTag = 0xc615
	IFD_CFAPlaneColor                 ExifTag = 0xc616
	IFD_CFALayout                     ExifTag = 0xc617
	IFD_LinearizationTable            ExifTag = 0xc618
	IFD_BlackLevelRepeatDim           ExifTag = 0xc619
	IFD_BlackLevel                    ExifTag = 0xc61a
	IFD_BlackLevelDeltaH              ExifTag = 0xc61b
	IFD_BlackLevelDeltaV              ExifTag = 0xc61c
	IFD_WhiteLevel                    ExifTag = 0xc61d
	IFD_DefaultScale                  ExifTag = 0xc61e
	IFD_DefaultCropOrigin             ExifTag = 0xc61f
	IFD_DefaultCropSize               ExifTag = 0xc620
	IFD_ColorMatrix1                  ExifTag = 0xc621
	IFD_ColorMatrix2                  ExifTag = 0xc622
	IFD_CameraCalibration1            ExifTag = 0xc623
	IFD_CameraCalibration2            ExifTag = 0xc624
	IFD_ReductionMatrix1              ExifTag = 0xc625
	IFD_ReductionMatrix2              ExifTag = 0xc626
	IFD_AnalogBalance                 ExifTag = 0xc627
	IFD_AsShotNeutral                 ExifTag = 0xc628
	IFD_AsShotWhiteXY                 ExifTag = 0xc629
	IFD_BaselineExposure              ExifTag = 0xc62a
	IFD_BaselineNoise                 ExifTag = 0xc62b
	IFD_BaselineSharpness             ExifTag = 0xc62c
	IFD_BayerGreenSplit               ExifTag = 0xc62d
	IFD_LinearResponseLimit           ExifTag = 0xc62e
	IFD_CameraSerialNumber            ExifTag = 0xc62f
	IFD_DNGLensInfo                   ExifTag = 0xc630
	IFD_ChromaBlurRadius              ExifTag = 0xc631
	IFD_AntiAliasStrength             ExifTag = 0xc632
	IFD_ShadowScale                   ExifTag = 0xc633
	IFD_DNGPrivateData                ExifTag = 0xc634
	IFD_MakerNoteSafety               ExifTag = 0xc635
	IFD_CalibrationIlluminant1        ExifTag = 0xc65a
	IFD_CalibrationIlluminant2        ExifTag = 0xc65b
	IFD_BestQualityScale              ExifTag = 0xc65c
	IFD_RawDataUniqueID               ExifTag = 0xc65d
	IFD_OriginalRawFileName           ExifTag = 0xc68b
	IFD_OriginalRawFileData           ExifTag = 0xc68c
	IFD_ActiveArea                    ExifTag = 0xc68d
	IFD_MaskedAreas                   ExifTag = 0xc68e
	IFD_AsShotICCProfile              ExifTag = 0xc68f
	IFD_AsShotPreProfileMatrix        ExifTag = 0xc690
	IFD_CurrentICCProfile             ExifTag = 0xc691
	IFD_CurrentPreProfileMatrix       ExifTag = 0xc692
	IFD_ColorimetricReference         ExifTag = 0xc6bf
	IFD_SRawType                      ExifTag = 0xc6c5
	IFD_PanasonicTitle                ExifTag = 0xc6d2
	IFD_PanasonicTitle2               ExifTag = 0xc6d3
	IFD_CameraCalibrationSig          ExifTag = 0xc6f3
	IFD_ProfileCalibrationSig         ExifTag = 0xc6f4
	IFD_ProfileIFD                    ExifTag = 0xc6f5
	IFD_AsShotProfileName             ExifTag = 0xc6f6
	IFD_NoiseReductionApplied         ExifTag = 0xc6f7
	IFD_ProfileName                   ExifTag = 0xc6f8
	IFD_ProfileHueSatMapDims          ExifTag = 0xc6f9
	IFD_ProfileHueSatMapData1         ExifTag = 0xc6fa
	IFD_ProfileHueSatMapData2         ExifTag = 0xc6fb
	IFD_ProfileToneCurve              ExifTag = 0xc6fc
	IFD_ProfileEmbedPolicy            ExifTag = 0xc6fd
	IFD_ProfileCopyright              ExifTag = 0xc6fe
	IFD_ForwardMatrix1                ExifTag = 0xc714
	IFD_ForwardMatrix2                ExifTag = 0xc715
	IFD_PreviewApplicationName        ExifTag = 0xc716
	IFD_PreviewApplicationVersion     ExifTag = 0xc717
	IFD_PreviewSettingsName           ExifTag = 0xc718
	IFD_PreviewSettingsDigest         ExifTag = 0xc719
	IFD_PreviewColorSpace             ExifTag = 0xc71a
	IFD_PreviewDateTime               ExifTag = 0xc71b
	IFD_RawImageDigest                ExifTag = 0xc71c
	IFD_OriginalRawFileDigest         ExifTag = 0xc71d
	IFD_ProfileLookTableDims          ExifTag = 0xc725
	IFD_ProfileLookTableData          ExifTag = 0xc726
	IFD_OpcodeList1                   ExifTag = 0xc740
	IFD_OpcodeList2                   ExifTag = 0xc741
	IFD_OpcodeList3                   ExifTag = 0xc74e
	IFD_NoiseProfile                  ExifTag = 0xc761
	IFD_TimeCodes                     ExifTag = 0xc763
	IFD_FrameRate                     ExifTag = 0xc764
	IFD_TStop                         ExifTag = 0xc772
	IFD_ReelName                      ExifTag = 0xc789
	IFD_OriginalDefaultFinalSize      ExifTag = 0xc791
	IFD_OriginalBestQualitySize       ExifTag = 0xc792
	IFD_OriginalDefaultCropSize       ExifTag = 0xc793
	IFD_CameraLabel                   ExifTag = 0xc7a1
	IFD_ProfileHueSatMapEncoding      ExifTag = 0xc7a3
	IFD_ProfileLookTableEncoding      ExifTag = 0xc7a4
	IFD_BaselineExposureOffset        ExifTag = 0xc7a5
	IFD_DefaultBlackRender            ExifTag = 0xc7a6
	IFD_NewRawImageDigest             ExifTag = 0xc7a7
	IFD_RawToPreviewGain              ExifTag = 0xc7a8
	IFD_CacheVersion                  ExifTag = 0xc7aa
	IFD_DefaultUserCrop               ExifTag = 0xc7b5
	IFD_DepthFormat                   ExifTag = 0xc7e9
	IFD_DepthNear                     ExifTag = 0xc7ea
	IFD_DepthFar                      ExifTag = 0xc7eb
	IFD_DepthUnits                    ExifTag = 0xc7ec
	IFD_DepthMeasureType              ExifTag = 0xc7ed
	IFD_EnhanceParams                 ExifTag = 0xc7ee
	IFD_ProfileGainTableMap           ExifTag = 0xcd2d
	IFD_SemanticName                  ExifTag = 0xcd2e
	IFD_SemanticInstanceIFD           ExifTag = 0xcd30
	IFD_CalibrationIlluminant3        ExifTag = 0xcd31
	IFD_CameraCalibration3            ExifTag = 0xcd32
	IFD_ColorMatrix3                  ExifTag = 0xcd33
	IFD_ForwardMatrix3                ExifTag = 0xcd34
	IFD_IlluminantData1               ExifTag = 0xcd35
	IFD_IlluminantData2               ExifTag = 0xcd36
	IFD_IlluminantData3               ExifTag = 0xcd37
	IFD_MaskSubArea                   ExifTag = 0xcd38
	IFD_ProfileHueSatMapData3         ExifTag = 0xcd39
	IFD_ReductionMatrix3              ExifTag = 0xcd3a
	IFD_RGBTables                     ExifTag = 0xcd3b
)

IFD Tag Ids (includes all IFD, IFD1, etc tags) 

const (
	ExifIFD_FreeOffsets                     ExifTag = 0x0120
	ExifIFD_FreeByteCounts                  ExifTag = 0x0121
	ExifIFD_GrayResponseCurve               ExifTag = 0x0123
	ExifIFD_T4Options                       ExifTag = 0x0124
	ExifIFD_T6Options                       ExifTag = 0x0125
	ExifIFD_ColorMap                        ExifTag = 0x0140
	ExifIFD_TileOffsets                     ExifTag = 0x0144
	ExifIFD_TileByteCounts                  ExifTag = 0x0145
	ExifIFD_CleanFaxData                    ExifTag = 0x0147
	ExifIFD_ExtraSamples                    ExifTag = 0x0152
	ExifIFD_Indexed                         ExifTag = 0x015a
	ExifIFD_JPEGTables                      ExifTag = 0x015b
	ExifIFD_OPIProxy                        ExifTag = 0x015f
	ExifIFD_GlobalParametersIFD             ExifTag = 0x0190
	ExifIFD_ProfileType                     ExifTag = 0x0191
	ExifIFD_FaxProfile                      ExifTag = 0x0192
	ExifIFD_CodingMethods                   ExifTag = 0x0193
	ExifIFD_JPEGTables_0x01b5               ExifTag = 0x01b5
	ExifIFD_JPEGProc                        ExifTag = 0x0200
	ExifIFD_JPEGQTables                     ExifTag = 0x0207
	ExifIFD_JPEGDCTables                    ExifTag = 0x0208
	ExifIFD_JPEGACTables                    ExifTag = 0x0209
	ExifIFD_XP_DIP_XML                      ExifTag = 0x4747
	ExifIFD_StitchInfo                      ExifTag = 0x4748
	ExifIFD_SonyRawFileType                 ExifTag = 0x7000
	ExifIFD_SonyToneCurve                   ExifTag = 0x7010
	ExifIFD_WangTag1                        ExifTag = 0x80a3
	ExifIFD_WangAnnotation                  ExifTag = 0x80a4
	ExifIFD_WangTag3                        ExifTag = 0x80a5
	ExifIFD_WangTag4                        ExifTag = 0x80a6
	ExifIFD_BatteryLevel                    ExifTag = 0x828f
	ExifIFD_KodakIFD                        ExifTag = 0x8290
	ExifIFD_ExposureTime                    ExifTag = 0x829a
	ExifIFD_FNumber                         ExifTag = 0x829d
	ExifIFD_MDFileTag                       ExifTag = 0x82a5
	ExifIFD_RasterPadding                   ExifTag = 0x84e3
	ExifIFD_ImageColorIndicator             ExifTag = 0x84e7
	ExifIFD_BackgroundColorIndicator        ExifTag = 0x84e8
	ExifIFD_HCUsage                         ExifTag = 0x84ee
	ExifIFD_AFCP_IPTC                       ExifTag = 0x8568
	ExifIFD_WB_GRGBLevels                   ExifTag = 0x8602
	ExifIFD_LeafData                        ExifTag = 0x8606
	ExifIFD_TIFF_FXExtensions               ExifTag = 0x877f
	ExifIFD_MultiProfiles                   ExifTag = 0x8780
	ExifIFD_SharedData                      ExifTag = 0x8781
	ExifIFD_ExposureProgram                 ExifTag = 0x8822
	ExifIFD_SpectralSensitivity             ExifTag = 0x8824
	ExifIFD_ISO                             ExifTag = 0x8827
	ExifIFD_OptoElectricConvFactor          ExifTag = 0x8828
	ExifIFD_TimeZoneOffset                  ExifTag = 0x882a
	ExifIFD_SelfTimerMode                   ExifTag = 0x882b
	ExifIFD_SensitivityType                 ExifTag = 0x8830
	ExifIFD_StandardOutputSensitivity       ExifTag = 0x8831
	ExifIFD_RecommendedExposureIndex        ExifTag = 0x8832
	ExifIFD_ISOSpeed                        ExifTag = 0x8833
	ExifIFD_ISOSpeedLatitudeyyy             ExifTag = 0x8834
	ExifIFD_ISOSpeedLatitudezzz             ExifTag = 0x8835
	ExifIFD_LeafSubIFD                      ExifTag = 0x888a
	ExifIFD_ExifVersion                     ExifTag = 0x9000
	ExifIFD_DateTimeOriginal                ExifTag = 0x9003
	ExifIFD_CreateDate                      ExifTag = 0x9004
	ExifIFD_GooglePlusUploadCode            ExifTag = 0x9009
	ExifIFD_OffsetTime                      ExifTag = 0x9010
	ExifIFD_OffsetTimeOriginal              ExifTag = 0x9011
	ExifIFD_OffsetTimeDigitized             ExifTag = 0x9012
	ExifIFD_ComponentsConfiguration         ExifTag = 0x9101
	ExifIFD_CompressedBitsPerPixel          ExifTag = 0x9102
	ExifIFD_ShutterSpeedValue               ExifTag = 0x9201
	ExifIFD_ApertureValue                   ExifTag = 0x9202
	ExifIFD_BrightnessValue                 ExifTag = 0x9203
	ExifIFD_ExposureCompensation            ExifTag = 0x9204
	ExifIFD_MaxApertureValue                ExifTag = 0x9205
	ExifIFD_SubjectDistance                 ExifTag = 0x9206
	ExifIFD_MeteringMode                    ExifTag = 0x9207
	ExifIFD_LightSource                     ExifTag = 0x9208
	ExifIFD_Flash                           ExifTag = 0x9209
	ExifIFD_FocalLength                     ExifTag = 0x920a
	ExifIFD_FlashEnergy                     ExifTag = 0x920b
	ExifIFD_FocalPlaneResolutionUnit        ExifTag = 0x9210
	ExifIFD_ImageNumber                     ExifTag = 0x9211
	ExifIFD_SecurityClassification          ExifTag = 0x9212
	ExifIFD_ImageHistory                    ExifTag = 0x9213
	ExifIFD_SubjectArea                     ExifTag = 0x9214
	ExifIFD_SensingMethod                   ExifTag = 0x9217
	ExifIFD_MakerNote                       ExifTag = 0x927c
	ExifIFD_UserComment                     ExifTag = 0x9286
	ExifIFD_SubSecTime                      ExifTag = 0x9290
	ExifIFD_SubSecTimeOriginal              ExifTag = 0x9291
	ExifIFD_SubSecTimeDigitized             ExifTag = 0x9292
	ExifIFD_MSPropertySetStorage            ExifTag = 0x9330
	ExifIFD_MSDocumentTextPosition          ExifTag = 0x9331
	ExifIFD_AmbientTemperature              ExifTag = 0x9400
	ExifIFD_Humidity                        ExifTag = 0x9401
	ExifIFD_Pressure                        ExifTag = 0x9402
	ExifIFD_WaterDepth                      ExifTag = 0x9403
	ExifIFD_Acceleration                    ExifTag = 0x9404
	ExifIFD_CameraElevationAngle            ExifTag = 0x9405
	ExifIFD_FlashpixVersion                 ExifTag = 0xa000
	ExifIFD_ColorSpace                      ExifTag = 0xa001
	ExifIFD_ExifImageWidth                  ExifTag = 0xa002
	ExifIFD_ExifImageHeight                 ExifTag = 0xa003
	ExifIFD_RelatedSoundFile                ExifTag = 0xa004
	ExifIFD_InteropOffset                   ExifTag = 0xa005
	ExifIFD_SamsungRawPointersOffset        ExifTag = 0xa010
	ExifIFD_SamsungRawPointersLength        ExifTag = 0xa011
	ExifIFD_SamsungRawByteOrder             ExifTag = 0xa101
	ExifIFD_SamsungRawUnknown               ExifTag = 0xa102
	ExifIFD_FlashEnergy_0xa20b              ExifTag = 0xa20b
	ExifIFD_SpatialFrequencyResponse        ExifTag = 0xa20c
	ExifIFD_FocalPlaneXResolution           ExifTag = 0xa20e
	ExifIFD_FocalPlaneYResolution           ExifTag = 0xa20f
	ExifIFD_FocalPlaneResolutionUnit_0xa210 ExifTag = 0xa210
	ExifIFD_SubjectLocation                 ExifTag = 0xa214
	ExifIFD_ExposureIndex                   ExifTag = 0xa215
	ExifIFD_SensingMethod_0xa217            ExifTag = 0xa217
	ExifIFD_FileSource                      ExifTag = 0xa300
	ExifIFD_SceneType                       ExifTag = 0xa301
	ExifIFD_CFAPattern                      ExifTag = 0xa302
	ExifIFD_CustomRendered                  ExifTag = 0xa401
	ExifIFD_ExposureMode                    ExifTag = 0xa402
	ExifIFD_WhiteBalance                    ExifTag = 0xa403
	ExifIFD_DigitalZoomRatio                ExifTag = 0xa404
	ExifIFD_FocalLengthIn35mmFormat         ExifTag = 0xa405
	ExifIFD_SceneCaptureType                ExifTag = 0xa406
	ExifIFD_GainControl                     ExifTag = 0xa407
	ExifIFD_Contrast                        ExifTag = 0xa408
	ExifIFD_Saturation                      ExifTag = 0xa409
	ExifIFD_Sharpness                       ExifTag = 0xa40a
	ExifIFD_DeviceSettingDescription        ExifTag = 0xa40b
	ExifIFD_SubjectDistanceRange            ExifTag = 0xa40c
	ExifIFD_ImageUniqueID                   ExifTag = 0xa420
	ExifIFD_OwnerName                       ExifTag = 0xa430
	ExifIFD_SerialNumber                    ExifTag = 0xa431
	ExifIFD_LensInfo                        ExifTag = 0xa432
	ExifIFD_LensMake                        ExifTag = 0xa433
	ExifIFD_LensModel                       ExifTag = 0xa434
	ExifIFD_LensSerialNumber                ExifTag = 0xa435
	ExifIFD_CompositeImage                  ExifTag = 0xa460
	ExifIFD_CompositeImageCount             ExifTag = 0xa461
	ExifIFD_CompositeImageExposureTimes     ExifTag = 0xa462
	ExifIFD_Gamma                           ExifTag = 0xa500
	ExifIFD_HasselbladRawImage              ExifTag = 0xb4c3
	ExifIFD_PixelFormat                     ExifTag = 0xbc01
	ExifIFD_Transformation                  ExifTag = 0xbc02
	ExifIFD_Uncompressed                    ExifTag = 0xbc03
	ExifIFD_ImageType                       ExifTag = 0xbc04
	ExifIFD_ImageOffset                     ExifTag = 0xbcc0
	ExifIFD_ImageByteCount                  ExifTag = 0xbcc1
	ExifIFD_AlphaOffset                     ExifTag = 0xbcc2
	ExifIFD_AlphaByteCount                  ExifTag = 0xbcc3
	ExifIFD_ImageDataDiscard                ExifTag = 0xbcc4
	ExifIFD_AlphaDataDiscard                ExifTag = 0xbcc5
	ExifIFD_Annotations                     ExifTag = 0xc44f
	ExifIFD_HasselbladExif                  ExifTag = 0xc51b
	ExifIFD_OriginalFileName                ExifTag = 0xc573
	ExifIFD_USPTOOriginalContentType        ExifTag = 0xc580
	ExifIFD_CR2CFAPattern                   ExifTag = 0xc5e0
	ExifIFD_RawImageSegmentation            ExifTag = 0xc640
	ExifIFD_AliasLayerMetadata              ExifTag = 0xc660
	ExifIFD_NikonNEFInfo                    ExifTag = 0xc7d5
	ExifIFD_Padding                         ExifTag = 0xea1c
	ExifIFD_OffsetSchema                    ExifTag = 0xea1d
	ExifIFD_OwnerName_0xfde8                ExifTag = 0xfde8
	ExifIFD_SerialNumber_0xfde9             ExifTag = 0xfde9
	ExifIFD_Lens                            ExifTag = 0xfdea
	ExifIFD_KDC_IFD                         ExifTag = 0xfe00
	ExifIFD_RawFile                         ExifTag = 0xfe4c
	ExifIFD_Converter                       ExifTag = 0xfe4d
	ExifIFD_WhiteBalance_0xfe4e             ExifTag = 0xfe4e
	ExifIFD_Exposure                        ExifTag = 0xfe51
	ExifIFD_Shadows                         ExifTag = 0xfe52
	ExifIFD_Brightness                      ExifTag = 0xfe53
	ExifIFD_Contrast_0xfe54                 ExifTag = 0xfe54
	ExifIFD_Saturation_0xfe55               ExifTag = 0xfe55
	ExifIFD_Sharpness_0xfe56                ExifTag = 0xfe56
	ExifIFD_Smoothness                      ExifTag = 0xfe57
	ExifIFD_MoireFilter                     ExifTag = 0xfe58
)

ExifIFD Tag Ids 

const (
	InteropIFD_InteropIndex           ExifTag = 0x0001
	InteropIFD_InteropVersion         ExifTag = 0x0002
	InteropIFD_RelatedImageFileFormat ExifTag = 0x1000
	InteropIFD_RelatedImageWidth      ExifTag = 0x1001
	InteropIFD_RelatedImageHeight     ExifTag = 0x1002
)

InteropIFD Tag Ids 

const (
	GpsIFD_GPSVersionID         ExifTag = 0x0000
	GpsIFD_GPSLatitudeRef       ExifTag = 0x0001
	GpsIFD_GPSLatitude          ExifTag = 0x0002
	GpsIFD_GPSLongitudeRef      ExifTag = 0x0003
	GpsIFD_GPSLongitude         ExifTag = 0x0004
	GpsIFD_GPSAltitudeRef       ExifTag = 0x0005
	GpsIFD_GPSAltitude          ExifTag = 0x0006
	GpsIFD_GPSTimeStamp         ExifTag = 0x0007
	GpsIFD_GPSSatellites        ExifTag = 0x0008
	GpsIFD_GPSStatus            ExifTag = 0x0009
	GpsIFD_GPSMeasureMode       ExifTag = 0x000a
	GpsIFD_GPSDOP               ExifTag = 0x000b
	GpsIFD_GPSSpeedRef          ExifTag = 0x000c
	GpsIFD_GPSSpeed             ExifTag = 0x000d
	GpsIFD_GPSTrackRef          ExifTag = 0x000e
	GpsIFD_GPSTrack             ExifTag = 0x000f
	GpsIFD_GPSImgDirectionRef   ExifTag = 0x0010
	GpsIFD_GPSImgDirection      ExifTag = 0x0011
	GpsIFD_GPSMapDatum          ExifTag = 0x0012
	GpsIFD_GPSDestLatitudeRef   ExifTag = 0x0013
	GpsIFD_GPSDestLatitude      ExifTag = 0x0014
	GpsIFD_GPSDestLongitudeRef  ExifTag = 0x0015
	GpsIFD_GPSDestLongitude     ExifTag = 0x0016
	GpsIFD_GPSDestBearingRef    ExifTag = 0x0017
	GpsIFD_GPSDestBearing       ExifTag = 0x0018
	GpsIFD_GPSDestDistanceRef   ExifTag = 0x0019
	GpsIFD_GPSDestDistance      ExifTag = 0x001a
	GpsIFD_GPSProcessingMethod  ExifTag = 0x001b
	GpsIFD_GPSAreaInformation   ExifTag = 0x001c
	GpsIFD_GPSDateStamp         ExifTag = 0x001d
	GpsIFD_GPSDifferential      ExifTag = 0x001e
	GpsIFD_GPSHPositioningError ExifTag = 0x001f
)

GpsIFD Tag Ids

type ExifTagDesc 

type ExifTagDesc struct {
	Id         ExifTag     `json:"id"`
	Name       string      `json:"name"`
	Type       ExifTagType `json:"type"`
	Mandatory  bool        `json:"mandatory"`
	Ifd        ExifIndex   `json:"ifd"`
	Count      int         `json:"count"`
	Offset     bool        `json:"offset"`
	OffsetPair ExifTag     `json:"offsetPair"`
	Permanent  bool        `json:"permanent"`
	Protected  bool        `json:"protected"`
	Values     interface{} `json:"values"`
}

type ExifTagType 

type ExifTagType uint8
const (
	ExifString ExifTagType = iota
	ExifUint8
	ExifUint16
	ExifUint32
	ExifInt16
	ExifInt32
	ExifRational
	ExifUrational
	ExifFloat
	ExifDouble
	ExifUndef
)

type IptcData 

type IptcData struct {
	// contains filtered or unexported fields
}

IptcData holds a map of iptc record tags

func NewIptcData 

func NewIptcData(segments *jpegstructure.SegmentList) (*IptcData, error)

NewIptcData creates IptcData from a jpeg segment list

func (*IptcData) GetDate 

func (ipd *IptcData) GetDate(dateTag IptcDate) time.Time

GetDate retrieves the given date value (including time if exists). In case of an error/missing date returns zero time

func (*IptcData) GetKeywords 

func (ipd *IptcData) GetKeywords() []string

GetKeywords retrieves IPTCApplication_Keywords. Returnes an empty slice in case of an error

func (*IptcData) GetTitle 

func (ipd *IptcData) GetTitle() string

GetTitle retrieves the IPTCApplication_ObjectName. Returns the empty string in case of an error

func (*IptcData) IsEmpty 

func (ipd *IptcData) IsEmpty() bool

IsEmpty returns true if IptcData has no tags

func (*IptcData) RawIptc 

func (ipd *IptcData) RawIptc() map[IptcRecordTag]IptcRecordDataset

RawIptc returns the raw iptc data

func (*IptcData) Scan 

func (ipd *IptcData) Scan(record IptcRecord, tag IptcTag, dest interface{}) error

Scan reads tag from record into dest

func (*IptcData) ScanApplication 

func (ipd *IptcData) ScanApplication(tag IptcTag, dest interface{}) error

ScanApplication reads tag from IPTCApplication into dest

func (*IptcData) ScanDate 

func (ipd *IptcData) ScanDate(dateTag IptcDate, dest *time.Time) error

ScanDate reads the specified date (both date and time) into dest

func (*IptcData) ScanEnvelope 

func (ipd *IptcData) ScanEnvelope(tag IptcTag, dest interface{}) error

ScanEnvelope reads tag from IPTCEnvelope into dest

func (*IptcData) String 

func (ipd *IptcData) String() string

type IptcDate 

type IptcDate int

IptcDate specifies date/time tag 

const (
	DateSent IptcDate = iota
	ReleaseDate
	ExpirationDate
	DateCreated
	DigitalCreationDate
)

The different Iptc Date/Times

type IptcEditor 

type IptcEditor struct {
	// contains filtered or unexported fields
}

IptcEditor holds raw iptc data

func NewIptcEditor 

func NewIptcEditor(sl *jpegstructure.SegmentList) (*IptcEditor, error)

NewIptcEditor from a jpeg segment list

func NewIptcEditorEmpty 

func NewIptcEditorEmpty(dirty bool) *IptcEditor

NewIptcEditorEmpty creates a new empty IptcEditor

func (*IptcEditor) Bytes 

func (ie *IptcEditor) Bytes() ([]byte, error)

Bytes generate Photoshop Image Resource block including IPTC information

func (*IptcEditor) Clear 

func (ie *IptcEditor) Clear(dirty bool)

Clear this model and set the dirty property

func (IptcEditor) IsDirty 

func (ie IptcEditor) IsDirty() bool

IsDirty returns true if the IptcData has been changed

func (IptcEditor) IsEmpty 

func (ie IptcEditor) IsEmpty() bool

IsEmpty returns true if this editor contains no data

func (*IptcEditor) Set 

func (ie *IptcEditor) Set(record IptcRecord, tag IptcTag, value interface{}) error

Set sets record with tag to value

func (*IptcEditor) SetDate 

func (ie *IptcEditor) SetDate(dateTag IptcDate, t time.Time) error

SetDate set the given dateTag to to T. This will set both the corresponding Date and Time tags

func (*IptcEditor) SetDirty 

func (ie *IptcEditor) SetDirty()

SetDirty force this editor to dirty

func (*IptcEditor) SetEnvelope 

func (ie *IptcEditor) SetEnvelope(tag IptcTag, value interface{}) error

SetEnvelope set IPTCEnvelop tag to value

func (*IptcEditor) SetKeywords 

func (ie *IptcEditor) SetKeywords(keywords []string) error

SetKeywords sets IPTCApplication_Keywords to keywords

func (*IptcEditor) SetTitle 

func (ie *IptcEditor) SetTitle(title string) error

SetTitle sets IPTCApplication_ObjectName to title

type IptcRecord 

type IptcRecord uint8
const (
	IPTCObjectData     IptcRecord = 8
	IPTCPostObjectData IptcRecord = 9
	IPTCPreObjectData  IptcRecord = 7
	IPTCApplication    IptcRecord = 2
	IPTCEnvelope       IptcRecord = 1
	IPTCFotoStation    IptcRecord = 240
	IPTCNewsPhoto      IptcRecord = 3
)

type IptcRecordDataset 

type IptcRecordDataset struct {
	Record     IptcRecord
	Tag        IptcTag
	Data       interface{}
	Type       IptcTagType
	Repeatable bool
}

IptcRecordDataset contains the iptc data for a Record/Tag. If Repeatable is true the Data will be of type slice

type IptcRecordTag 

type IptcRecordTag struct {
	Record IptcRecord
	Tag    IptcTag
}

type IptcTag 

type IptcTag uint8
const (
	IPTCApplication_ObjectPreviewData             IptcTag = 202
	IPTCApplication_ShortDocumentID               IptcTag = 186
	IPTCApplication_MasterDocumentID              IptcTag = 185
	IPTCApplication_ExpirationDate                IptcTag = 37
	IPTCApplication_AudioSamplingRate             IptcTag = 151
	IPTCApplication_CountryPrimaryLocationCode    IptcTag = 100
	IPTCApplication_UniqueDocumentID              IptcTag = 187
	IPTCApplication_SimilarityIndex               IptcTag = 228
	IPTCApplication_ReferenceService              IptcTag = 45
	IPTCApplication_Keywords                      IptcTag = 25
	IPTCApplication_WriterEditor                  IptcTag = 122
	IPTCApplication_ProgramVersion                IptcTag = 70
	IPTCApplication_OriginalTransmissionReference IptcTag = 103
	IPTCApplication_DocumentNotes                 IptcTag = 230
	IPTCApplication_Byline                        IptcTag = 80
	IPTCApplication_OriginatingProgram            IptcTag = 65
	IPTCApplication_DateCreated                   IptcTag = 55
	IPTCApplication_ReleaseTime                   IptcTag = 35
	IPTCApplication_ExpirationTime                IptcTag = 38
	IPTCApplication_ImageType                     IptcTag = 130
	IPTCApplication_ContentLocationCode           IptcTag = 26
	IPTCApplication_Category                      IptcTag = 15
	IPTCApplication_ExifCameraInfo                IptcTag = 232
	IPTCApplication_CaptionAbstract               IptcTag = 120
	IPTCApplication_CopyrightNotice               IptcTag = 116
	IPTCApplication_ContentLocationName           IptcTag = 27
	IPTCApplication_ReferenceDate                 IptcTag = 47
	IPTCApplication_EditorialUpdate               IptcTag = 8
	IPTCApplication_Source                        IptcTag = 115
	IPTCApplication_EditStatus                    IptcTag = 7
	IPTCApplication_ObjectPreviewFileFormat       IptcTag = 200
	IPTCApplication_ProvinceState                 IptcTag = 95
	IPTCApplication_CatalogSets                   IptcTag = 255
	IPTCApplication_JobID                         IptcTag = 184
	IPTCApplication_ActionAdvised                 IptcTag = 42
	IPTCApplication_FixtureIdentifier             IptcTag = 22
	IPTCApplication_AudioOutcue                   IptcTag = 154
	IPTCApplication_ObjectPreviewFileVersion      IptcTag = 201
	IPTCApplication_ObjectAttributeReference      IptcTag = 4
	IPTCApplication_Contact                       IptcTag = 118
	IPTCApplication_Credit                        IptcTag = 110
	IPTCApplication_AudioSamplingResolution       IptcTag = 152
	IPTCApplication_City                          IptcTag = 90
	IPTCApplication_TimeCreated                   IptcTag = 60
	IPTCApplication_ReferenceNumber               IptcTag = 50
	IPTCApplication_ReleaseDate                   IptcTag = 30
	IPTCApplication_RasterizedCaption             IptcTag = 125
	IPTCApplication_ImageOrientation              IptcTag = 131
	IPTCApplication_Urgency                       IptcTag = 10
	IPTCApplication_LocalCaption                  IptcTag = 121
	IPTCApplication_LanguageIdentifier            IptcTag = 135
	IPTCApplication_Prefs                         IptcTag = 221
	IPTCApplication_SpecialInstructions           IptcTag = 40
	IPTCApplication_SupplementalCategories        IptcTag = 20
	IPTCApplication_ApplicationRecordVersion      IptcTag = 0
	IPTCApplication_ObjectCycle                   IptcTag = 75
	IPTCApplication_ClassifyState                 IptcTag = 225
	IPTCApplication_DocumentHistory               IptcTag = 231
	IPTCApplication_AudioDuration                 IptcTag = 153
	IPTCApplication_Sublocation                   IptcTag = 92
	IPTCApplication_BylineTitle                   IptcTag = 85
	IPTCApplication_Headline                      IptcTag = 105
	IPTCApplication_DigitalCreationDate           IptcTag = 62
	IPTCApplication_CountryPrimaryLocationName    IptcTag = 101
	IPTCApplication_AudioType                     IptcTag = 150
	IPTCApplication_DigitalCreationTime           IptcTag = 63
	IPTCApplication_ObjectName                    IptcTag = 5
	IPTCApplication_ObjectTypeReference           IptcTag = 3
	IPTCApplication_OwnerID                       IptcTag = 188
	IPTCApplication_SubjectReference              IptcTag = 12
)

IPTCApplication tag constants 

const (
	IPTCEnvelope_ProductID             IptcTag = 50
	IPTCEnvelope_EnvelopePriority      IptcTag = 60
	IPTCEnvelope_ServiceIdentifier     IptcTag = 30
	IPTCEnvelope_FileVersion           IptcTag = 22
	IPTCEnvelope_EnvelopeNumber        IptcTag = 40
	IPTCEnvelope_FileFormat            IptcTag = 20
	IPTCEnvelope_EnvelopeRecordVersion IptcTag = 0
	IPTCEnvelope_ARMVersion            IptcTag = 122
	IPTCEnvelope_DateSent              IptcTag = 70
	IPTCEnvelope_UniqueObjectName      IptcTag = 100
	IPTCEnvelope_Destination           IptcTag = 5
	IPTCEnvelope_TimeSent              IptcTag = 80
	IPTCEnvelope_ARMIdentifier         IptcTag = 120
	IPTCEnvelope_CodedCharacterSet     IptcTag = 90
)

IPTCEnvelope tag constants 

const (
	IPTCNewsPhoto_QuantizationMethod     IptcTag = 120
	IPTCNewsPhoto_ColorPalette           IptcTag = 85
	IPTCNewsPhoto_InterchangeColorSpace  IptcTag = 64
	IPTCNewsPhoto_IPTCImageWidth         IptcTag = 20
	IPTCNewsPhoto_ExcursionTolerance     IptcTag = 130
	IPTCNewsPhoto_NewsPhotoVersion       IptcTag = 0
	IPTCNewsPhoto_NumIndexEntries        IptcTag = 84
	IPTCNewsPhoto_IPTCPixelWidth         IptcTag = 40
	IPTCNewsPhoto_ColorSequence          IptcTag = 65
	IPTCNewsPhoto_SupplementalType       IptcTag = 55
	IPTCNewsPhoto_IPTCImageRotation      IptcTag = 102
	IPTCNewsPhoto_MaximumDensityRange    IptcTag = 140
	IPTCNewsPhoto_SampleStructure        IptcTag = 90
	IPTCNewsPhoto_ScanningDirection      IptcTag = 100
	IPTCNewsPhoto_DataCompressionMethod  IptcTag = 110
	IPTCNewsPhoto_GammaCompensatedValue  IptcTag = 145
	IPTCNewsPhoto_ICC_Profile            IptcTag = 66
	IPTCNewsPhoto_BitsPerComponent       IptcTag = 135
	IPTCNewsPhoto_LookupTable            IptcTag = 80
	IPTCNewsPhoto_IPTCPictureNumber      IptcTag = 10
	IPTCNewsPhoto_ColorCalibrationMatrix IptcTag = 70
	IPTCNewsPhoto_EndPoints              IptcTag = 125
	IPTCNewsPhoto_IPTCBitsPerSample      IptcTag = 86
	IPTCNewsPhoto_IPTCPixelHeight        IptcTag = 50
	IPTCNewsPhoto_ColorRepresentation    IptcTag = 60
	IPTCNewsPhoto_IPTCImageHeight        IptcTag = 30
)

IPTCNewsPhoto tag constants 

const (
	IPTCPreObjectData_MaxSubfileSize      IptcTag = 20
	IPTCPreObjectData_SizeMode            IptcTag = 10
	IPTCPreObjectData_ObjectSizeAnnounced IptcTag = 90
	IPTCPreObjectData_MaximumObjectSize   IptcTag = 95
)

IPTCPreObjectData tag constants 

const (
	IPTCObjectData_SubFile IptcTag = 10
)

IPTCObjectData tag constants 

const (
	IPTCPostObjectData_ConfirmedObjectSize IptcTag = 10
)

IPTCPostObjectData tag constants

type IptcTagDesc 

type IptcTagDesc struct {
	Id         IptcTag     `json:"id"`
	Name       string      `json:"name"`
	Type       IptcTagType `json:"type"`
	MinLength  int         `json:"minLength"`
	MaxLength  int         `json:"maxLength"`
	Mandatory  bool        `json:"mandatory"`
	Repeatable bool        `json:"repeatable"`
	Writable   bool        `json:"writable"`
	Values     interface{} `json:"values"`
}

type IptcTagType 

type IptcTagType uint8
const (
	IptcString IptcTagType = iota
	IptcDigits
	IptcUint8
	IptcUint16
	IptcUint32
	IptcUndef
)

type JpegEditor 

type JpegEditor struct {
	// contains filtered or unexported fields
}

JpegEditor holds the exif, xmp and iptc editors as well as the jpeg segment list

func NewJpegEditor 

func NewJpegEditor(data []byte) (*JpegEditor, error)

NewJpegEditor from a jpeg image byte slice

func NewJpegEditorFile 

func NewJpegEditorFile(fileName string) (*JpegEditor, error)

NewJpegEditorFile from a jpeg image file

func (*JpegEditor) Bytes 

func (je *JpegEditor) Bytes() ([]byte, error)

Bytes return jpeg image bytes from this editor. Any edits will be committed

func (*JpegEditor) CopyMetaData 

func (je *JpegEditor) CopyMetaData(sourceImg []byte) error

CopyMetaData copies and replaces metadata (xmp,iptc,exif) from sourcImg

func (*JpegEditor) DropExif 

func (je *JpegEditor) DropExif() error

DropExif removes exif data from this editor

func (*JpegEditor) DropIptc 

func (je *JpegEditor) DropIptc() error

DropIptc removes iptc data from this editor

func (*JpegEditor) DropMetaData 

func (je *JpegEditor) DropMetaData() error

DropMetaData removes xmp, exif, iptc data from this editor

func (*JpegEditor) DropXmp 

func (je *JpegEditor) DropXmp() error

DropXmp removes xmp data from this editor

func (JpegEditor) Exif 

func (je JpegEditor) Exif() *ExifEditor

Exif returns the exifEditor

func (JpegEditor) Iptc 

func (je JpegEditor) Iptc() *IptcEditor

Iptc returns the iptcEditor

func (*JpegEditor) MetaData 

func (je *JpegEditor) MetaData() (*MetaData, error)

MetaData returns a metadata struct based on this editor. Will commit any changes first

func (*JpegEditor) SetKeywords 

func (je *JpegEditor) SetKeywords(keywords []string) error

SetKeywords sets the keywords in Xmp and Iptc

func (*JpegEditor) SetTitle 

func (je *JpegEditor) SetTitle(title string) error

SetTitle sets title in Xmp and Iptc and ImageDescription in Exif

Example 
je, err := NewJpegEditorFile("../assets/leica.jpg")
if err != nil {
	fmt.Printf("Could not retrieve editor for file: %v\n", err)
	return
}
err = je.SetTitle("some new title")
if err != nil {
	fmt.Printf("Could not set title: %v\n", err)
	return
}
md, err := je.MetaData()
if err != nil {
	fmt.Printf("Could not get metadata: %v\n", err)
}
fmt.Printf("New Title: %v\n", md.Summary().Title)

Output:

New Title: some new title

func (*JpegEditor) WriteFile 

func (je *JpegEditor) WriteFile(dest string) error

WriteFile writes this editor to file by first committing any edits. Any existing file will be truncated. Destination needs to have jpg or jpeg extension

func (JpegEditor) Xmp 

func (je JpegEditor) Xmp() *XmpEditor

Xmp returns the xmp editor

type LensInfo 

type LensInfo struct {
	MinFocalLength           URat `json:"minFocalLength,omitempty"`
	MaxFocalLength           URat `json:"maxFocalLength,omitempty"`
	MinFNumberMinFocalLength URat `json:"minFNumberMinFocalLength,omitempty"`
	MinFNumberMaxFocalLength URat `json:"MinFNumberMaxFocalLength,omitempty"`
}

LensInfo reprsents an Exif LensInfo object

func (LensInfo) String 

func (li LensInfo) String() string

type MetaData 

type MetaData struct {
	ImageWidth  uint
	ImageHeight uint
	// contains filtered or unexported fields
}

MetaData keeps xmp, iptc, exif data as well as image dimensions

func NewMetaData 

func NewMetaData(data []byte) (*MetaData, error)

NewMetaData reads a jpeg image byte slice

func NewMetaDataFromFile 

func NewMetaDataFromFile(filename string) (*MetaData, error)

NewMetaDataFromFile reads a jpeg image file

Example 
md, err := NewMetaDataFromFile("../assets/leica.jpg")
if err != nil {
	fmt.Printf("Could not open file: %v\n", err)
	return
}
fmt.Printf("Make: %s, Model: %s\n", md.Summary().CameraMake, md.Summary().CameraModel)

Output:

Make: LEICA CAMERA AG, Model: LEICA Q2

func (*MetaData) Exif 

func (md *MetaData) Exif() *ExifData

Exif returens the exif portion of the MetaData. Can be nil

func (*MetaData) Iptc 

func (md *MetaData) Iptc() *IptcData

Iptc returns the iptc portion of the MetaData. Can be nil

func (*MetaData) String 

func (md *MetaData) String() string

func (*MetaData) Summary 

func (md *MetaData) Summary() *Summary

Summary parses the metadata and returns its Summary. If the summary has already been parsed returns a cached copy of it

func (*MetaData) SummaryErr 

func (md *MetaData) SummaryErr() error

SummaryErr returns any error any error from the Summary parsing

func (*MetaData) Xmp 

func (md *MetaData) Xmp() XmpData

Xmp returns the Xmp portion of the metadata

type Rat 

type Rat struct {
	Numerator   int32
	Denominator int32
}

Rat represents a signed Exif float

func (Rat) Float32 

func (r Rat) Float32() float32

Float32 convert to float32. Return NaNs as 0

func (Rat) Float64 

func (r Rat) Float64() float64

Float64 convert to float64. Return NaNs as 0

func (Rat) IsZero 

func (r Rat) IsZero() bool

IsZero true if both Numerator and Denominator are 0

func (Rat) String 

func (r Rat) String() string

type Summary added in v0.0.9 

type Summary struct {
	Title                   string        `json:"title,omitempty"`
	Keywords                []string      `json:"keywords,omitempty"`
	Software                string        `json:"software,omitempty"`
	Rating                  uint16        `json:"rating,omitempty"`
	CameraMake              string        `json:"cameraMake,omitempty"`
	CameraModel             string        `json:"cameraModel,omitempty"`
	LensInfo                LensInfo      `json:"lensInfo,omitempty"`
	LensModel               string        `json:"lensModel,omitempty"`
	LensMake                string        `json:"lensMake,omitempty"`
	FocalLength             URat          `json:"focalLength,omitempty"`
	FocalLengthIn35mmFormat uint16        `json:"focalLengthIn35mmFormat,omitempty"`
	MaxApertureValue        URat          `json:"maxApertureValue,omitempty"`
	FlashMode               uint16        `json:"flashMode,omitempty"`
	ExposureTime            URat          `json:"exposureTime,omitempty"`
	ExposureCompensation    Rat           `json:"exposureCompensation,omitempty"`
	ExposureProgram         uint16        `json:"exposureProgram,omitempty"`
	FNumber                 URat          `json:"fNumber,omitempty"`
	ISO                     uint16        `json:"ISO,omitempty"`
	ColorSpace              uint16        `json:"colorSpace,omitempty"`
	XResolution             URat          `json:"xResolution,omitempty"`
	YResolution             URat          `json:"yResolution,omitempty"`
	OriginalDate            time.Time     `json:"originalDate,omitempty"`
	ModifyDate              time.Time     `json:"modifyDate,omitempty"`
	GPSInfo                 *exif.GpsInfo `json:"gpsInfo,omitempty"`
	City                    string        `json:"city,omitempty"`
	Country                 string        `json:"country,omitempty"`
	State                   string        `json:"state,omitempty"`
}

Summary holds the most common image metadata of interest

func (Summary) String added in v0.0.9 

func (ec Summary) String() string

type URat 

type URat struct {
	Numerator   uint32
	Denominator uint32
}

URat represents an unsigned Exif float

func (URat) Float32 

func (r URat) Float32() float32

Float32 convert to float32. It will return NaN as 0

func (URat) Float64 

func (r URat) Float64() float64

Float64 convert to float64. It will return NaN as 0

func (URat) IsZero 

func (r URat) IsZero() bool

IsZero true if both Numerator and Denominator are 0

func (URat) String 

func (r URat) String() string

type XmpData 

type XmpData struct {
	// contains filtered or unexported fields
}

XmpData holds the underlying xmp document

func NewXmpData 

func NewXmpData(segments *jpegstructure.SegmentList) (XmpData, error)

NewXmpData creates an XmpData struct from a jpeg segment list

func NewXmpDataFromBytes 

func NewXmpDataFromBytes(data []byte) (XmpData, error)

NewXmpDataFromBytes creates an XmpData struct from marshalled xmp.Document

func (XmpData) Base 

func (xd XmpData) Base() *xmpbase.XmpBase

Base retrieves the base model

func (XmpData) DublinCore 

func (xd XmpData) DublinCore() *dc.DublinCore

DublinCore retrieves the DublinCore model

func (XmpData) GetKeywords 

func (xd XmpData) GetKeywords() []string

GetKeywords returns the keywords from DublinCore

func (XmpData) GetRating 

func (xd XmpData) GetRating() uint16

GetRating returns rating from Base

func (XmpData) GetTitle 

func (xd XmpData) GetTitle() string

GetTitle returns the DublinCore title if it exists

func (XmpData) IsEmpty 

func (xd XmpData) IsEmpty() bool

IsEmpty returns true if the xmp document is nil or has no nodes

func (XmpData) MM 

func (xd XmpData) MM() *xmpmm.XmpMM

MM retrieves the MediaManagement (MM) model

func (XmpData) PhotoShop 

func (xd XmpData) PhotoShop() *ps.PhotoshopInfo

PhotoShop retrieves the Photoshop Model

func (XmpData) String 

func (xd XmpData) String() string

type XmpEditor 

type XmpEditor struct {
	XmpData
	// contains filtered or unexported fields
}

XmpEditor add a dirty field to the XmpData

func NewXmpEditor 

func NewXmpEditor(sl *jpegstructure.SegmentList) (*XmpEditor, error)

NewXmpEditor from a jpeg segment list

func NewXmpEditorFromBytes 

func NewXmpEditorFromBytes(data []byte) (*XmpEditor, error)

NewXmpEditorFromBytes from a marshalled xmp.Document

func NewXmpEditorFromDocument 

func NewXmpEditorFromDocument(doc *xmp.Document) (*XmpEditor, error)

NewXmpEditorFromDocument from an xmp.document

func (*XmpEditor) Bytes 

func (xe *XmpEditor) Bytes(prefix bool) ([]byte, error)

Bytes commits any changes and writes the xmpDocument to bytes. If prefix is adds "http://ns.adobe.com/xap/1.0/\000" so it can be added to a jpeg segment list

func (*XmpEditor) Clear 

func (xe *XmpEditor) Clear(dirty bool)

Clear the underlying xmp.Document and sets the dirty flag

func (*XmpEditor) Document 

func (xe *XmpEditor) Document() *xmp.Document

Document commits any changes and returns the xmp.Document

func (XmpEditor) IsDirty 

func (xe XmpEditor) IsDirty() bool

IsDirty true if any changes has been made to this editor

func (*XmpEditor) SetDirty 

func (xe *XmpEditor) SetDirty()

SetDirty force this editor to be marked as dirty

func (*XmpEditor) SetDocument 

func (xe *XmpEditor) SetDocument(doc *xmp.Document, dirty bool)

SetDocument sets the xmp.Document of this editor

func (*XmpEditor) SetKeywords 

func (xe *XmpEditor) SetKeywords(keywords []string)

SetKeywords sets the DublicCore keywords

func (*XmpEditor) SetRating 

func (xe *XmpEditor) SetRating(rating uint16)

SetRating sets the Base rating

func (*XmpEditor) SetTitle 

func (xe *XmpEditor) SetTitle(title string)

SetTitle sets the Dublin Core title

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