mirror of https://github.com/dsoprea/go-exif.git
exif-read-tool: Added unit-test and minimum documentation.
Dustin Oprea
parent
f4cb06d79d
commit
cebf021131
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@ -1,3 +1,16 @@
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// This tool dumps EXIF information from images.
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//
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// Example command-line:
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//
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// exif-read-tool -filepath <file-path>
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//
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// Example Output:
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//
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// IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x010f) NAME=[Make] COUNT=(6) TYPE=[ASCII] VALUE=[Canon]
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// IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0110) NAME=[Model] COUNT=(22) TYPE=[ASCII] VALUE=[Canon EOS 5D Mark III]
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// IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0112) NAME=[Orientation] COUNT=(1) TYPE=[SHORT] VALUE=[1]
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// IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x011a) NAME=[XResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[72/1]
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// ...
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package main
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import (
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@ -56,7 +69,7 @@ func main() {
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// Run the parse.
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ti := exif.NewTagIndex()
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visitor := func(indexedIfdName string, tagId uint16, tagType exif.TagType, valueContext exif.ValueContext) (err error) {
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visitor := func(ii exif.IfdIdentity, ifdIndex int, tagId uint16, tagType exif.TagType, valueContext exif.ValueContext) (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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@ -64,10 +77,10 @@ func main() {
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}
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}()
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it, err := ti.Get(indexedIfdName, tagId)
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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, exif.ErrTagNotFound) {
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fmt.Printf("WARNING: Unknown tag: [%s] (%04x)\n", indexedIfdName, tagId)
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fmt.Printf("WARNING: Unknown tag: [%s] (%04x)\n", ii, tagId)
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return nil
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} else {
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log.Panic(err)
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@ -76,7 +89,7 @@ func main() {
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valueString := ""
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if tagType.Type() == exif.TypeUndefined {
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value, err := exif.UndefinedValue(indexedIfdName, tagId, valueContext, tagType.ByteOrder())
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value, err := exif.UndefinedValue(ii, tagId, valueContext, tagType.ByteOrder())
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if log.Is(err, exif.ErrUnhandledUnknownTypedTag) {
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valueString = "!UNDEFINED!"
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} else if err != nil {
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@ -89,10 +102,10 @@ func main() {
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log.PanicIf(err)
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}
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fmt.Printf("IFD=[%s] ID=(0x%04x) NAME=[%s] COUNT=(%d) TYPE=[%s] VALUE=[%s]\n", indexedIfdName, tagId, it.Name, valueContext.UnitCount, tagType.Name(), valueString)
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fmt.Printf("IFD=[%s] ID=(0x%04x) NAME=[%s] COUNT=(%d) TYPE=[%s] VALUE=[%s]\n", ii, tagId, it.Name, valueContext.UnitCount, tagType.Name(), valueString)
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return nil
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}
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err = e.Visit(data[foundAt:], visitor)
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_, err = e.Visit(data[foundAt:], visitor)
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log.PanicIf(err)
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}
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@ -0,0 +1,113 @@
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package main
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import (
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"testing"
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"os"
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"path"
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"bytes"
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"fmt"
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"os/exec"
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"github.com/dsoprea/go-logging"
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)
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var (
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assetsPath = ""
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appFilepath = ""
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)
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func TestMain(t *testing.T) {
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imageFilepath := path.Join(assetsPath, "NDM_8901.jpg")
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cmd := exec.Command(
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"go", "run", appFilepath,
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"-filepath", imageFilepath)
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b := new(bytes.Buffer)
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cmd.Stdout = b
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cmd.Stderr = b
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err := cmd.Run()
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actual := b.String()
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if err != nil {
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fmt.Printf(actual)
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log.Panic(err)
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}
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expected := `IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x010f) NAME=[Make] COUNT=(6) TYPE=[ASCII] VALUE=[Canon]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0110) NAME=[Model] COUNT=(22) TYPE=[ASCII] VALUE=[Canon EOS 5D Mark III]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0112) NAME=[Orientation] COUNT=(1) TYPE=[SHORT] VALUE=[1]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x011a) NAME=[XResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[72/1]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x011b) NAME=[YResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[72/1]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0128) NAME=[ResolutionUnit] COUNT=(1) TYPE=[SHORT] VALUE=[2]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0132) NAME=[DateTime] COUNT=(20) TYPE=[ASCII] VALUE=[2017:12:02 08:18:50]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x013b) NAME=[Artist] COUNT=(1) TYPE=[ASCII] VALUE=[]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0213) NAME=[YCbCrPositioning] COUNT=(1) TYPE=[SHORT] VALUE=[2]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x8298) NAME=[Copyright] COUNT=(1) TYPE=[ASCII] VALUE=[]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x8769) NAME=[ExifTag] COUNT=(1) TYPE=[LONG] VALUE=[360]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x829a) NAME=[ExposureTime] COUNT=(1) TYPE=[RATIONAL] VALUE=[1/640]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x829d) NAME=[FNumber] COUNT=(1) TYPE=[RATIONAL] VALUE=[4/1]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x8822) NAME=[ExposureProgram] COUNT=(1) TYPE=[SHORT] VALUE=[4]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x8827) NAME=[ISOSpeedRatings] COUNT=(1) TYPE=[SHORT] VALUE=[1600]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x8830) NAME=[SensitivityType] COUNT=(1) TYPE=[SHORT] VALUE=[2]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x8832) NAME=[RecommendedExposureIndex] COUNT=(1) TYPE=[LONG] VALUE=[1600]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9000) NAME=[ExifVersion] COUNT=(4) TYPE=[UNDEFINED] VALUE=[0230]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9003) NAME=[DateTimeOriginal] COUNT=(20) TYPE=[ASCII] VALUE=[2017:12:02 08:18:50]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9004) NAME=[DateTimeDigitized] COUNT=(20) TYPE=[ASCII] VALUE=[2017:12:02 08:18:50]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9101) NAME=[ComponentsConfiguration] COUNT=(4) TYPE=[UNDEFINED] VALUE=[ComponentsConfiguration<ID=[YCBCR] BYTES=[1 2 3 0]>]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9201) NAME=[ShutterSpeedValue] COUNT=(1) TYPE=[SRATIONAL] VALUE=[614400/65536]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9202) NAME=[ApertureValue] COUNT=(1) TYPE=[RATIONAL] VALUE=[262144/65536]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9204) NAME=[ExposureBiasValue] COUNT=(1) TYPE=[SRATIONAL] VALUE=[0/1]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9207) NAME=[MeteringMode] COUNT=(1) TYPE=[SHORT] VALUE=[5]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9209) NAME=[Flash] COUNT=(1) TYPE=[SHORT] VALUE=[16]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x920a) NAME=[FocalLength] COUNT=(1) TYPE=[RATIONAL] VALUE=[16/1]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[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]>]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9286) NAME=[UserComment] COUNT=(264) TYPE=[UNDEFINED] VALUE=[UserComment<ENCODING=[UNDEFINED] V=[]>]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9290) NAME=[SubSecTime] COUNT=(3) TYPE=[ASCII] VALUE=[00]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9291) NAME=[SubSecTimeOriginal] COUNT=(3) TYPE=[ASCII] VALUE=[00]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0x9292) NAME=[SubSecTimeDigitized] COUNT=(3) TYPE=[ASCII] VALUE=[00]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa000) NAME=[FlashpixVersion] COUNT=(4) TYPE=[UNDEFINED] VALUE=[0100]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa001) NAME=[ColorSpace] COUNT=(1) TYPE=[SHORT] VALUE=[1]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa002) NAME=[PixelXDimension] COUNT=(1) TYPE=[SHORT] VALUE=[3840]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa003) NAME=[PixelYDimension] COUNT=(1) TYPE=[SHORT] VALUE=[2560]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa005) NAME=[InteroperabilityTag] COUNT=(1) TYPE=[LONG] VALUE=[9326]
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IFD=[IfdIdentity<PARENT-NAME=[Exif] NAME=[Iop]>] ID=(0x0001) NAME=[InteroperabilityIndex] COUNT=(4) TYPE=[ASCII] VALUE=[R98]
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IFD=[IfdIdentity<PARENT-NAME=[Exif] NAME=[Iop]>] ID=(0x0002) NAME=[InteroperabilityVersion] COUNT=(4) TYPE=[UNDEFINED] VALUE=[0100]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa20e) NAME=[FocalPlaneXResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[3840000/1461]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa20f) NAME=[FocalPlaneYResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[2560000/972]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa210) NAME=[FocalPlaneResolutionUnit] COUNT=(1) TYPE=[SHORT] VALUE=[2]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa401) NAME=[CustomRendered] COUNT=(1) TYPE=[SHORT] VALUE=[0]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa402) NAME=[ExposureMode] COUNT=(1) TYPE=[SHORT] VALUE=[0]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa403) NAME=[WhiteBalance] COUNT=(1) TYPE=[SHORT] VALUE=[0]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa406) NAME=[SceneCaptureType] COUNT=(1) TYPE=[SHORT] VALUE=[0]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa430) NAME=[CameraOwnerName] COUNT=(1) TYPE=[ASCII] VALUE=[]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa431) NAME=[BodySerialNumber] COUNT=(13) TYPE=[ASCII] VALUE=[063024020097]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa432) NAME=[LensSpecification] COUNT=(4) TYPE=[RATIONAL] VALUE=[16/1]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa434) NAME=[LensModel] COUNT=(22) TYPE=[ASCII] VALUE=[EF16-35mm f/4L IS USM]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[Exif]>] ID=(0xa435) NAME=[LensSerialNumber] COUNT=(11) TYPE=[ASCII] VALUE=[2400001068]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x8825) NAME=[GPSTag] COUNT=(1) TYPE=[LONG] VALUE=[9554]
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IFD=[IfdIdentity<PARENT-NAME=[IFD] NAME=[GPSInfo]>] ID=(0x0000) NAME=[GPSVersionID] COUNT=(4) TYPE=[BYTE] VALUE=[2]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0103) NAME=[Compression] COUNT=(1) TYPE=[SHORT] VALUE=[6]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x011a) NAME=[XResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[72/1]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x011b) NAME=[YResolution] COUNT=(1) TYPE=[RATIONAL] VALUE=[72/1]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0128) NAME=[ResolutionUnit] COUNT=(1) TYPE=[SHORT] VALUE=[2]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0201) NAME=[JPEGInterchangeFormat] COUNT=(1) TYPE=[LONG] VALUE=[11444]
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IFD=[IfdIdentity<PARENT-NAME=[] NAME=[IFD]>] ID=(0x0202) NAME=[JPEGInterchangeFormatLength] COUNT=(1) TYPE=[LONG] VALUE=[21491]
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`
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if actual != expected {
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t.Fatalf("Output not as expected:\n%s", actual)
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}
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}
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func init() {
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goPath := os.Getenv("GOPATH")
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if goPath == "" {
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log.Panicf("GOPATH is empty")
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}
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assetsPath = path.Join(goPath, "src", "github.com", "dsoprea", "go-exif", "assets")
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appFilepath = path.Join(goPath, "src", "github.com", "dsoprea", "go-exif", "exif-read-tool", "main.go")
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}
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