mirror of https://github.com/dsoprea/go-exif.git
423 lines
16 KiB
Go
423 lines
16 KiB
Go
package exif
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import (
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"bytes"
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"fmt"
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"os"
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"reflect"
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"sort"
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"testing"
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"encoding/binary"
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"io/ioutil"
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"github.com/dsoprea/go-logging"
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"github.com/dsoprea/go-exif/v3/common"
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)
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func TestVisit(t *testing.T) {
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defer func() {
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if state := recover(); state != nil {
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err := log.Wrap(state.(error))
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log.PrintError(err)
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t.Fatalf("Test failure.")
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}
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}()
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ti := NewTagIndex()
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// Open the file.
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testImageFilepath := getTestImageFilepath()
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f, err := os.Open(testImageFilepath)
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log.PanicIf(err)
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defer f.Close()
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data, err := ioutil.ReadAll(f)
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log.PanicIf(err)
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// Search for the beginning of the EXIF information. The EXIF is near the
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// very beginning of our/most JPEGs, so this has a very low cost.
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// TODO(dustin): Just use SearchAndExtractExifWithReader() here.
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foundAt := -1
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for i := 0; i < len(data); i++ {
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if _, err := ParseExifHeader(data[i:]); err == nil {
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foundAt = i
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break
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} else if log.Is(err, ErrNoExif) == false {
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log.Panic(err)
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}
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}
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if foundAt == -1 {
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log.Panicf("EXIF start not found")
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}
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// Run the parse.
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im, err := exifcommon.NewIfdMappingWithStandard()
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log.PanicIf(err)
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tags := make([]string, 0)
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// DEPRECATED(dustin): fqIfdPath and ifdIndex are now redundant. Remove in next module version.
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visitor := func(ite *IfdTagEntry) (err error) {
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defer func() {
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if state := recover(); state != nil {
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err = log.Wrap(state.(error))
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log.Panic(err)
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}
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}()
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tagId := ite.TagId()
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tagType := ite.TagType()
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ii := ite.ifdIdentity
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it, err := ti.Get(ii, tagId)
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if err != nil {
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if log.Is(err, ErrTagNotFound) {
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fmt.Printf("Unknown tag: [%s] (%04x)\n", ii.String(), tagId)
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return nil
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}
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log.Panic(err)
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}
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valueString, err := ite.FormatFirst()
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log.PanicIf(err)
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description := fmt.Sprintf("IFD-PATH=[%s] ID=(0x%04x) NAME=[%s] COUNT=(%d) TYPE=[%s] VALUE=[%s]", ii.String(), tagId, it.Name, ite.UnitCount(), tagType.String(), valueString)
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tags = append(tags, description)
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return nil
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}
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_, furthestOffset, err := Visit(exifcommon.IfdStandardIfdIdentity, im, ti, data[foundAt:], visitor, nil)
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log.PanicIf(err)
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if furthestOffset != 32935 {
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t.Fatalf("Furthest-offset is not valid: (%d)", furthestOffset)
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}
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expected := []string{
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"IFD-PATH=[IFD] ID=(0x010f) NAME=[Make] COUNT=(6) TYPE=[ASCII] VALUE=[Canon]",
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"IFD-PATH=[IFD] ID=(0x0110) NAME=[Model] COUNT=(22) TYPE=[ASCII] VALUE=[Canon EOS 5D Mark III]",
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"IFD-PATH=[IFD] ID=(0x0112) NAME=[Orientation] COUNT=(1) TYPE=[SHORT] VALUE=[1]",
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"IFD-PATH=[IFD] ID=(0x011a) NAME=[XResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[72/1]",
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"IFD-PATH=[IFD] ID=(0x011b) NAME=[YResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[72/1]",
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"IFD-PATH=[IFD] ID=(0x0128) NAME=[ResolutionUnit] COUNT=(1) TYPE=[SHORT] VALUE=[2]",
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"IFD-PATH=[IFD] ID=(0x0132) NAME=[DateTime] COUNT=(20) TYPE=[ASCII] VALUE=[2017:12:02 08:18:50]",
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"IFD-PATH=[IFD] ID=(0x013b) NAME=[Artist] COUNT=(1) TYPE=[ASCII] VALUE=[]",
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"IFD-PATH=[IFD] ID=(0x0213) NAME=[YCbCrPositioning] COUNT=(1) TYPE=[SHORT] VALUE=[2]",
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"IFD-PATH=[IFD] ID=(0x8298) NAME=[Copyright] COUNT=(1) TYPE=[ASCII] VALUE=[]",
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"IFD-PATH=[IFD] ID=(0x8769) NAME=[ExifTag] COUNT=(1) TYPE=[LONG] VALUE=[360]",
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"IFD-PATH=[IFD/Exif] ID=(0x829a) NAME=[ExposureTime] COUNT=(1) TYPE=[RATIONAL] VALUE=[1/640]",
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"IFD-PATH=[IFD/Exif] ID=(0x829d) NAME=[FNumber] COUNT=(1) TYPE=[RATIONAL] VALUE=[4/1]",
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"IFD-PATH=[IFD/Exif] ID=(0x8822) NAME=[ExposureProgram] COUNT=(1) TYPE=[SHORT] VALUE=[4]",
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"IFD-PATH=[IFD/Exif] ID=(0x8827) NAME=[ISOSpeedRatings] COUNT=(1) TYPE=[SHORT] VALUE=[1600]",
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"IFD-PATH=[IFD/Exif] ID=(0x8830) NAME=[SensitivityType] COUNT=(1) TYPE=[SHORT] VALUE=[2]",
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"IFD-PATH=[IFD/Exif] ID=(0x8832) NAME=[RecommendedExposureIndex] COUNT=(1) TYPE=[LONG] VALUE=[1600]",
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"IFD-PATH=[IFD/Exif] ID=(0x9000) NAME=[ExifVersion] COUNT=(4) TYPE=[UNDEFINED] VALUE=[0230]",
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"IFD-PATH=[IFD/Exif] ID=(0x9003) NAME=[DateTimeOriginal] COUNT=(20) TYPE=[ASCII] VALUE=[2017:12:02 08:18:50]",
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"IFD-PATH=[IFD/Exif] ID=(0x9004) NAME=[DateTimeDigitized] COUNT=(20) TYPE=[ASCII] VALUE=[2017:12:02 08:18:50]",
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"IFD-PATH=[IFD/Exif] ID=(0x9101) NAME=[ComponentsConfiguration] COUNT=(4) TYPE=[UNDEFINED] VALUE=[Exif9101ComponentsConfiguration<ID=[YCBCR] BYTES=[1 2 3 0]>]",
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"IFD-PATH=[IFD/Exif] ID=(0x9201) NAME=[ShutterSpeedValue] COUNT=(1) TYPE=[SRATIONAL] VALUE=[614400/65536]",
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"IFD-PATH=[IFD/Exif] ID=(0x9202) NAME=[ApertureValue] COUNT=(1) TYPE=[RATIONAL] VALUE=[262144/65536]",
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"IFD-PATH=[IFD/Exif] ID=(0x9204) NAME=[ExposureBiasValue] COUNT=(1) TYPE=[SRATIONAL] VALUE=[0/1]",
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"IFD-PATH=[IFD/Exif] ID=(0x9207) NAME=[MeteringMode] COUNT=(1) TYPE=[SHORT] VALUE=[5]",
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"IFD-PATH=[IFD/Exif] ID=(0x9209) NAME=[Flash] COUNT=(1) TYPE=[SHORT] VALUE=[16]",
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"IFD-PATH=[IFD/Exif] ID=(0x920a) NAME=[FocalLength] COUNT=(1) TYPE=[RATIONAL] VALUE=[16/1]",
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"IFD-PATH=[IFD/Exif] ID=(0x927c) NAME=[MakerNote] COUNT=(8152) TYPE=[UNDEFINED] VALUE=[MakerNote<TYPE-ID=[28 00 01 00 03 00 31 00 00 00 74 05 00 00 02 00 03 00 04 00] LEN=(8152) SHA1=[d4154aa7df5474efe7ab38de2595919b9b4cc29f]>]",
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"IFD-PATH=[IFD/Exif] ID=(0x9286) NAME=[UserComment] COUNT=(264) TYPE=[UNDEFINED] VALUE=[UserComment<SIZE=(256) ENCODING=[UNDEFINED] V=[0 0 0 0 0 0 0 0]... LEN=(256)>]",
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"IFD-PATH=[IFD/Exif] ID=(0x9290) NAME=[SubSecTime] COUNT=(3) TYPE=[ASCII] VALUE=[00]",
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"IFD-PATH=[IFD/Exif] ID=(0x9291) NAME=[SubSecTimeOriginal] COUNT=(3) TYPE=[ASCII] VALUE=[00]",
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"IFD-PATH=[IFD/Exif] ID=(0x9292) NAME=[SubSecTimeDigitized] COUNT=(3) TYPE=[ASCII] VALUE=[00]",
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"IFD-PATH=[IFD/Exif] ID=(0xa000) NAME=[FlashpixVersion] COUNT=(4) TYPE=[UNDEFINED] VALUE=[0100]",
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"IFD-PATH=[IFD/Exif] ID=(0xa001) NAME=[ColorSpace] COUNT=(1) TYPE=[SHORT] VALUE=[1]",
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"IFD-PATH=[IFD/Exif] ID=(0xa002) NAME=[PixelXDimension] COUNT=(1) TYPE=[SHORT] VALUE=[3840]",
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"IFD-PATH=[IFD/Exif] ID=(0xa003) NAME=[PixelYDimension] COUNT=(1) TYPE=[SHORT] VALUE=[2560]",
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"IFD-PATH=[IFD/Exif] ID=(0xa005) NAME=[InteroperabilityTag] COUNT=(1) TYPE=[LONG] VALUE=[9326]",
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"IFD-PATH=[IFD/Exif/Iop] ID=(0x0001) NAME=[InteroperabilityIndex] COUNT=(4) TYPE=[ASCII] VALUE=[R98]",
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"IFD-PATH=[IFD/Exif/Iop] ID=(0x0002) NAME=[InteroperabilityVersion] COUNT=(4) TYPE=[UNDEFINED] VALUE=[0100]",
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"IFD-PATH=[IFD/Exif] ID=(0xa20e) NAME=[FocalPlaneXResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[3840000/1461]",
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"IFD-PATH=[IFD/Exif] ID=(0xa20f) NAME=[FocalPlaneYResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[2560000/972]",
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"IFD-PATH=[IFD/Exif] ID=(0xa210) NAME=[FocalPlaneResolutionUnit] COUNT=(1) TYPE=[SHORT] VALUE=[2]",
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"IFD-PATH=[IFD/Exif] ID=(0xa401) NAME=[CustomRendered] COUNT=(1) TYPE=[SHORT] VALUE=[0]",
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"IFD-PATH=[IFD/Exif] ID=(0xa402) NAME=[ExposureMode] COUNT=(1) TYPE=[SHORT] VALUE=[0]",
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"IFD-PATH=[IFD/Exif] ID=(0xa403) NAME=[WhiteBalance] COUNT=(1) TYPE=[SHORT] VALUE=[0]",
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"IFD-PATH=[IFD/Exif] ID=(0xa406) NAME=[SceneCaptureType] COUNT=(1) TYPE=[SHORT] VALUE=[0]",
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"IFD-PATH=[IFD/Exif] ID=(0xa430) NAME=[CameraOwnerName] COUNT=(1) TYPE=[ASCII] VALUE=[]",
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"IFD-PATH=[IFD/Exif] ID=(0xa431) NAME=[BodySerialNumber] COUNT=(13) TYPE=[ASCII] VALUE=[063024020097]",
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"IFD-PATH=[IFD/Exif] ID=(0xa432) NAME=[LensSpecification] COUNT=(4) TYPE=[RATIONAL] VALUE=[16/1...]",
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"IFD-PATH=[IFD/Exif] ID=(0xa434) NAME=[LensModel] COUNT=(22) TYPE=[ASCII] VALUE=[EF16-35mm f/4L IS USM]",
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"IFD-PATH=[IFD/Exif] ID=(0xa435) NAME=[LensSerialNumber] COUNT=(11) TYPE=[ASCII] VALUE=[2400001068]",
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"IFD-PATH=[IFD] ID=(0x8825) NAME=[GPSTag] COUNT=(1) TYPE=[LONG] VALUE=[9554]",
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"IFD-PATH=[IFD/GPSInfo] ID=(0x0000) NAME=[GPSVersionID] COUNT=(4) TYPE=[BYTE] VALUE=[02 03 00 00]",
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"IFD-PATH=[IFD1] ID=(0x0103) NAME=[Compression] COUNT=(1) TYPE=[SHORT] VALUE=[6]",
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"IFD-PATH=[IFD1] ID=(0x011a) NAME=[XResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[72/1]",
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"IFD-PATH=[IFD1] ID=(0x011b) NAME=[YResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[72/1]",
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"IFD-PATH=[IFD1] ID=(0x0128) NAME=[ResolutionUnit] COUNT=(1) TYPE=[SHORT] VALUE=[2]",
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"IFD-PATH=[IFD1] ID=(0x0201) NAME=[JPEGInterchangeFormat] COUNT=(1) TYPE=[LONG] VALUE=[11444]",
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"IFD-PATH=[IFD1] ID=(0x0202) NAME=[JPEGInterchangeFormatLength] COUNT=(1) TYPE=[LONG] VALUE=[21491]",
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}
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if reflect.DeepEqual(tags, expected) == false {
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fmt.Printf("\n")
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fmt.Printf("ACTUAL:\n")
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fmt.Printf("\n")
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for _, line := range tags {
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fmt.Println(line)
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}
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fmt.Printf("\n")
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fmt.Printf("EXPECTED:\n")
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fmt.Printf("\n")
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for _, line := range expected {
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fmt.Println(line)
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}
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fmt.Printf("\n")
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t.Fatalf("tags not correct.")
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}
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}
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func TestSearchFileAndExtractExif(t *testing.T) {
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testImageFilepath := getTestImageFilepath()
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// Returns a slice starting with the EXIF data and going to the end of the
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// image.
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rawExif, err := SearchFileAndExtractExif(testImageFilepath)
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log.PanicIf(err)
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testExifData := getTestExifData()
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if bytes.Compare(rawExif[:len(testExifData)], testExifData) != 0 {
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t.Fatalf("found EXIF data not correct")
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}
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}
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func TestSearchAndExtractExif(t *testing.T) {
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testImageFilepath := getTestImageFilepath()
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imageData, err := ioutil.ReadFile(testImageFilepath)
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log.PanicIf(err)
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rawExif, err := SearchAndExtractExif(imageData)
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log.PanicIf(err)
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testExifData := getTestExifData()
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if bytes.Compare(rawExif[:len(testExifData)], testExifData) != 0 {
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t.Fatalf("found EXIF data not correct")
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}
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}
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func TestSearchAndExtractExifWithReader(t *testing.T) {
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testImageFilepath := getTestImageFilepath()
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f, err := os.Open(testImageFilepath)
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log.PanicIf(err)
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defer f.Close()
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rawExif, err := SearchAndExtractExifWithReader(f)
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log.PanicIf(err)
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testExifData := getTestExifData()
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if bytes.Compare(rawExif[:len(testExifData)], testExifData) != 0 {
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t.Fatalf("found EXIF data not correct")
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}
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}
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func TestCollect(t *testing.T) {
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defer func() {
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if state := recover(); state != nil {
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err := log.Wrap(state.(error))
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log.PrintError(err)
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t.Fatalf("Test failure.")
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}
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}()
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testImageFilepath := getTestImageFilepath()
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rawExif, err := SearchFileAndExtractExif(testImageFilepath)
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log.PanicIf(err)
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im, err := exifcommon.NewIfdMappingWithStandard()
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log.PanicIf(err)
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ti := NewTagIndex()
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_, index, err := Collect(im, ti, rawExif)
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log.PanicIf(err)
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rootIfd := index.RootIfd
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ifds := index.Ifds
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tree := index.Tree
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lookup := index.Lookup
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if rootIfd.Offset() != uint32(0x0008) {
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t.Fatalf("Root-IFD not correct: (0x%04d).", rootIfd.Offset())
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} else if rootIfd.id != 0 {
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t.Fatalf("Root-IFD does not have the right ID: (%d)", rootIfd.id)
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} else if tree[0] != rootIfd {
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t.Fatalf("Root-IFD is not indexed properly.")
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} else if len(ifds) != 5 {
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t.Fatalf("The IFD list is not the right size: (%d)", len(ifds))
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} else if len(tree) != 5 {
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t.Fatalf("The IFD tree is not the right size: (%d)", len(tree))
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}
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actualIfdPaths := make([]string, len(lookup))
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i := 0
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for ifdPath := range lookup {
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actualIfdPaths[i] = ifdPath
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i++
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}
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sort.Strings(actualIfdPaths)
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expectedIfdPaths := []string{
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"IFD",
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"IFD/Exif",
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"IFD/Exif/Iop",
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"IFD/GPSInfo",
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"IFD1",
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}
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if reflect.DeepEqual(actualIfdPaths, expectedIfdPaths) != true {
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t.Fatalf("The IFD lookup is not the right size: %v", actualIfdPaths)
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}
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if rootIfd.nextIfdOffset != 0x2c54 {
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t.Fatalf("Root IFD does not continue correctly: (0x%04x)", rootIfd.nextIfdOffset)
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} else if rootIfd.nextIfd.Offset() != rootIfd.nextIfdOffset {
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t.Fatalf("Root IFD neighbor object does not have the right offset: (0x%04x != 0x%04x)", rootIfd.nextIfd.Offset(), rootIfd.nextIfdOffset)
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} else if rootIfd.nextIfd.nextIfdOffset != 0 {
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t.Fatalf("Root IFD chain not terminated correctly (1).")
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} else if rootIfd.nextIfd.nextIfd != nil {
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t.Fatalf("Root IFD chain not terminated correctly (2).")
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}
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if rootIfd.ifdIdentity.UnindexedString() != exifcommon.IfdStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Root IFD is not labeled correctly: [%s]", rootIfd.ifdIdentity.UnindexedString())
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} else if rootIfd.nextIfd.ifdIdentity.UnindexedString() != exifcommon.IfdStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Root IFD sibling is not labeled correctly: [%s]", rootIfd.ifdIdentity.UnindexedString())
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} else if rootIfd.Children()[0].ifdIdentity.UnindexedString() != exifcommon.IfdExifStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Root IFD child (0) is not labeled correctly: [%s]", rootIfd.Children()[0].ifdIdentity.UnindexedString())
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} else if rootIfd.Children()[1].ifdIdentity.UnindexedString() != exifcommon.IfdGpsInfoStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Root IFD child (1) is not labeled correctly: [%s]", rootIfd.Children()[1].ifdIdentity.UnindexedString())
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} else if rootIfd.Children()[0].children[0].ifdIdentity.UnindexedString() != exifcommon.IfdExifIopStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Exif IFD child is not an IOP IFD: [%s]", rootIfd.Children()[0].children[0].ifdIdentity.UnindexedString())
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}
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if lookup[exifcommon.IfdStandardIfdIdentity.UnindexedString()].ifdIdentity.UnindexedString() != exifcommon.IfdStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Lookup for standard IFD not correct.")
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} else if lookup[exifcommon.IfdStandardIfdIdentity.UnindexedString()+"1"].ifdIdentity.UnindexedString() != exifcommon.IfdStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Lookup for standard IFD not correct.")
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}
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if lookup[exifcommon.IfdExifStandardIfdIdentity.UnindexedString()].ifdIdentity.UnindexedString() != exifcommon.IfdExifStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Lookup for EXIF IFD not correct.")
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}
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if lookup[exifcommon.IfdGpsInfoStandardIfdIdentity.UnindexedString()].ifdIdentity.UnindexedString() != exifcommon.IfdGpsInfoStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Lookup for GPS IFD not correct.")
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}
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if lookup[exifcommon.IfdExifIopStandardIfdIdentity.UnindexedString()].ifdIdentity.UnindexedString() != exifcommon.IfdExifIopStandardIfdIdentity.UnindexedString() {
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t.Fatalf("Lookup for IOP IFD not correct.")
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}
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foundExif := 0
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foundGps := 0
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for _, ite := range lookup[exifcommon.IfdStandardIfdIdentity.UnindexedString()].entries {
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if ite.ChildIfdPath() == exifcommon.IfdExifStandardIfdIdentity.UnindexedString() {
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foundExif++
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if ite.TagId() != exifcommon.IfdExifStandardIfdIdentity.TagId() {
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t.Fatalf("EXIF IFD tag-ID mismatch: (0x%04x) != (0x%04x)", ite.TagId(), exifcommon.IfdExifStandardIfdIdentity.TagId())
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}
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}
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if ite.ChildIfdPath() == exifcommon.IfdGpsInfoStandardIfdIdentity.UnindexedString() {
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foundGps++
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if ite.TagId() != exifcommon.IfdGpsInfoStandardIfdIdentity.TagId() {
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t.Fatalf("GPS IFD tag-ID mismatch: (0x%04x) != (0x%04x)", ite.TagId(), exifcommon.IfdGpsInfoStandardIfdIdentity.TagId())
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}
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}
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}
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if foundExif != 1 {
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t.Fatalf("Exactly one EXIF IFD tag wasn't found: (%d)", foundExif)
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} else if foundGps != 1 {
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t.Fatalf("Exactly one GPS IFD tag wasn't found: (%d)", foundGps)
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}
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|
foundIop := 0
|
|
for _, ite := range lookup[exifcommon.IfdExifStandardIfdIdentity.UnindexedString()].entries {
|
|
if ite.ChildIfdPath() == exifcommon.IfdExifIopStandardIfdIdentity.UnindexedString() {
|
|
foundIop++
|
|
|
|
if ite.TagId() != exifcommon.IfdExifIopStandardIfdIdentity.TagId() {
|
|
t.Fatalf("IOP IFD tag-ID mismatch: (0x%04x) != (0x%04x)", ite.TagId(), exifcommon.IfdExifIopStandardIfdIdentity.TagId())
|
|
}
|
|
}
|
|
}
|
|
|
|
if foundIop != 1 {
|
|
t.Fatalf("Exactly one IOP IFD tag wasn't found: (%d)", foundIop)
|
|
}
|
|
}
|
|
|
|
func TestParseExifHeader(t *testing.T) {
|
|
testExifData := getTestExifData()
|
|
|
|
eh, err := ParseExifHeader(testExifData)
|
|
log.PanicIf(err)
|
|
|
|
if eh.ByteOrder != binary.LittleEndian {
|
|
t.Fatalf("Byte-order of EXIF header not correct.")
|
|
} else if eh.FirstIfdOffset != 0x8 {
|
|
t.Fatalf("First IFD offset not correct.")
|
|
}
|
|
}
|
|
|
|
func TestExif_BuildAndParseExifHeader(t *testing.T) {
|
|
headerBytes, err := BuildExifHeader(exifcommon.TestDefaultByteOrder, 0x11223344)
|
|
log.PanicIf(err)
|
|
|
|
eh, err := ParseExifHeader(headerBytes)
|
|
log.PanicIf(err)
|
|
|
|
if eh.ByteOrder != exifcommon.TestDefaultByteOrder {
|
|
t.Fatalf("Byte-order of EXIF header not correct.")
|
|
} else if eh.FirstIfdOffset != 0x11223344 {
|
|
t.Fatalf("First IFD offset not correct.")
|
|
}
|
|
}
|
|
|
|
func ExampleBuildExifHeader() {
|
|
headerBytes, err := BuildExifHeader(exifcommon.TestDefaultByteOrder, 0x11223344)
|
|
log.PanicIf(err)
|
|
|
|
eh, err := ParseExifHeader(headerBytes)
|
|
log.PanicIf(err)
|
|
|
|
fmt.Printf("%v\n", eh)
|
|
|
|
// Output: ExifHeader<BYTE-ORDER=[BigEndian] FIRST-IFD-OFFSET=(0x11223344)>
|
|
}
|