/
raw.go
63 lines (51 loc) · 1012 Bytes
/
raw.go
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package raw
import (
"bytes"
"encoding/binary"
"io"
"os"
"github.com/rwcarlsen/goexif/exif"
)
// RAF is the Fuji raw file format
type RAF struct {
Header struct {
Magic [16]byte
FormatVersion [4]byte
CameraID [8]byte
Camera [32]byte
Dir struct {
Version [4]byte
_ [20]byte
Jpeg struct {
IDX int32
Len int32
}
}
}
Jpeg []byte
Exif *exif.Exif
}
// WriteJpeg writes the raw preview jpeg
func (r *RAF) WriteJpeg(w io.Writer) {
w.Write(r.Jpeg)
}
// ReadRAF makes a new RAF from a file
func ReadRAF(fname string) *RAF {
raf := new(RAF)
f, err := os.Open(fname)
defer f.Close()
if err == nil {
err = binary.Read(f, binary.BigEndian, &raf.Header)
}
jbuf := make([]byte, raf.Header.Dir.Jpeg.Len)
f.ReadAt(jbuf, int64(raf.Header.Dir.Jpeg.IDX))
raf.Jpeg = jbuf
// Soon.
// exif.RegisterParsers(mknote.Fuji)
buf := bytes.NewBuffer(jbuf)
raf.Exif, err = exif.Decode(buf)
if err != nil {
panic(err)
}
return raf
}