mirror of
https://github.com/dsoprea/go-exif.git
synced 2025-05-31 11:41:57 +00:00
08ac8466dd
This allows us to pass around individual tokens that we can use to generate IDs, names, and qualified and non-qualified IFD paths, rather than [necessarily] having to pass or store them individually. The previous global variables were strings. Now they are IfdIdentity structs and have been renamed to be more accurate (in general, as well as for this). The previous variables have been kept but are now just assigned to the newer variables. This is backwards-compatibility that will be removed in the future.
80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
package exifundefined
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import (
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"fmt"
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"encoding/binary"
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"github.com/dsoprea/go-logging"
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"github.com/dsoprea/go-exif/v2/common"
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)
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type TagExifA300FileSource uint32
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func (TagExifA300FileSource) EncoderName() string {
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return "CodecExifA300FileSource"
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}
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func (af TagExifA300FileSource) String() string {
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return fmt.Sprintf("0x%08x", uint32(af))
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}
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const (
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TagUndefinedType_A300_SceneType_Others TagExifA300FileSource = 0
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TagUndefinedType_A300_SceneType_ScannerOfTransparentType TagExifA300FileSource = 1
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TagUndefinedType_A300_SceneType_ScannerOfReflexType TagExifA300FileSource = 2
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TagUndefinedType_A300_SceneType_Dsc TagExifA300FileSource = 3
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)
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type CodecExifA300FileSource struct {
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}
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func (CodecExifA300FileSource) Encode(value interface{}, byteOrder binary.ByteOrder) (encoded []byte, unitCount uint32, 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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}
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}()
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st, ok := value.(TagExifA300FileSource)
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if ok == false {
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log.Panicf("can only encode a TagExifA300FileSource")
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}
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ve := exifcommon.NewValueEncoder(byteOrder)
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ed, err := ve.Encode([]uint32{uint32(st)})
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log.PanicIf(err)
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// TODO(dustin): Confirm this size against the specification. It's non-specific about what type it is, but it looks to be no more than a single integer scalar. So, we're assuming it's a LONG.
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return ed.Encoded, 1, nil
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}
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func (CodecExifA300FileSource) Decode(valueContext *exifcommon.ValueContext) (value EncodeableValue, 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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}
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}()
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valueContext.SetUndefinedValueType(exifcommon.TypeLong)
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valueLongs, err := valueContext.ReadLongs()
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log.PanicIf(err)
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return TagExifA300FileSource(valueLongs[0]), nil
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}
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func init() {
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registerEncoder(
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TagExifA300FileSource(0),
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CodecExifA300FileSource{})
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registerDecoder(
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exifcommon.IfdExifStandardIfdIdentity.UnindexedString(),
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0xa300,
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CodecExifA300FileSource{})
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}
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