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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Google Inc.
*
* exif.h - EXIF tag creator using libexif
*/
#ifndef __ANDROID_JPEG_EXIF_H__
#define __ANDROID_JPEG_EXIF_H__
#include <string>
#include <time.h>
#include <libexif/exif-data.h>
#include <libcamera/geometry.h>
#include <libcamera/span.h>
class Exif
{
public:
Exif();
~Exif();
enum Compression {
None = 1,
JPEG = 6,
};
enum StringEncoding {
NoEncoding = 0,
ASCII = 1,
Unicode = 2,
};
void setMake(const std::string &make);
void setModel(const std::string &model);
void setOrientation(int orientation);
void setSize(const libcamera::Size &size);
void setThumbnail(libcamera::Span<const unsigned char> thumbnail,
Compression compression);
void setTimestamp(time_t timestamp);
libcamera::Span<const uint8_t> data() const { return { exifData_, size_ }; }
[[nodiscard]] int generate();
private:
ExifEntry *createEntry(ExifIfd ifd, ExifTag tag);
ExifEntry *createEntry(ExifIfd ifd, ExifTag tag, ExifFormat format,
unsigned long components, unsigned int size);
void setShort(ExifIfd ifd, ExifTag tag, uint16_t item);
void setLong(ExifIfd ifd, ExifTag tag, uint32_t item);
void setString(ExifIfd ifd, ExifTag tag, ExifFormat format,
const std::string &item,
StringEncoding encoding = NoEncoding);
void setRational(ExifIfd ifd, ExifTag tag, ExifRational item);
std::u16string utf8ToUtf16(const std::string &str);
bool valid_;
ExifData *data_;
ExifMem *mem_;
ExifByteOrder order_;
unsigned char *exifData_;
unsigned int size_;
};
#endif /* __ANDROID_JPEG_EXIF_H__ */
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