func (self *Data) Open(file string) error {
cfile := C.CString(file)
self.ed = C.exif_data_new_from_file(cfile)
defer C.free(unsafe.Pointer(self.ed))
C.free(unsafe.Pointer(cfile))
if self.ed == nil {
return fmt.Errorf("No EXIF data in file: %s\n", file)
}
values := C.exif_dump(self.ed)
for true {
value := C.pop_exif_value(values)
if value == nil {
break
} else {
self.Tags[strings.Trim(C.GoString((*value).name), " ")] = strings.Trim(C.GoString((*value).value), " ")
}
C.free_exif_value(value)
}
C.free(unsafe.Pointer(values))
return nil
}
func (d *Data) parseExifData(exifData *C.ExifData) error {
values := C.exif_dump(exifData)
defer C.free(unsafe.Pointer(values))
for {
value := C.pop_exif_value(values)
if value == nil {
break
} else {
d.Tags[strings.Trim(C.GoString((*value).name), " ")] = strings.Trim(C.GoString((*value).value), " ")
}
C.free_exif_value(value)
}
return nil
}
func (self *Data) parseExifData(exifData *C.ExifData) error {
values := C.exif_dump(exifData)
for {
value := C.pop_exif_value(values)
if value == nil {
break
} else {
tag := strings.Trim(C.GoString((*value).name), " ")
if 0x927c == (*value).tag || 0x9286 == (*value).tag {
// for makernote and usercomment, we just store b64encoded value
self.Tags[tag] = base64.StdEncoding.EncodeToString(
C.GoBytes(unsafe.Pointer((*value).value), (*value).length))
} else {
self.Tags[tag] = strings.Trim(C.GoString((*value).value), " ")
}
}
C.free_exif_value(value)
}
C.free(unsafe.Pointer(values))
return nil
}