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/*
* EXIF metadata parser - internal functions
* Copyright (c) 2013 Thilo Borgmann <thilo.borgmann _at_ mail.de>
* Copyright (c) 2024-2025 Leo Izen <leo.izen@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* EXIF metadata parser - internal functions
* @author Thilo Borgmann <thilo.borgmann _at_ mail.de>
* @author Leo Izen <leo.izen@gmail.com>
*/
#ifndef AVCODEC_EXIF_INTERNAL_H
#define AVCODEC_EXIF_INTERNAL_H
#include "libavutil/buffer.h"
#include "libavutil/frame.h"
#include "exif.h"
#include "version_major.h"
#if FF_API_OLD_EXIF
/* Used by the AVI demuxer */
int avpriv_exif_decode_ifd(void *logctx, const uint8_t *buf, int size,
int le, int depth, AVDictionary **metadata);
#endif /* FF_API_OLD_EXIF */
#define MAKERNOTE_TAG 0x927c
#define ORIENTATION_TAG 0x112
#define EXIFIFD_TAG 0x8769
#define IMAGE_WIDTH_TAG 0x100
#define IMAGE_LENGTH_TAG 0x101
#define PIXEL_X_TAG 0xa002
#define PIXEL_Y_TAG 0xa003
/**
* Compares values in the IFD with data in the provided AVFrame and sets the values
* in that IFD to match the ones in that AVFrame. This is mostly useful for an
* encoder that wishes to use ff_exif_get_buffer, but would prefer to modify the
* IFD after it is sanitized and call av_exif_write afterward.
*/
int ff_exif_sanitize_ifd(void *logctx, const AVFrame *frame, AVExifMetadata *ifd);
/**
* Gets all relevant side data, collects it into an IFD, and writes it into the
* corresponding buffer pointer. This includes both AV_FRAME_DATA_EXIF and other
* side data types that are included in the frame data, such as possibly an
* instance of AV_FRAME_DATA_DISPLAYMATRIX. It also sets width and height tags
* to match those of the AVFrame if they are different.
*
* Upon error, *buffer will be NULL. The buffer becomes owned by the caller upon
* success. The *buffer argument must be NULL before calling. If *buffer is NULL
* upon return then a negative return value indicates an error, and a zero return
* value indicates that there was no EXIF data to write.
*/
int ff_exif_get_buffer(void *logctx, const AVFrame *frame, AVBufferRef **buffer, enum AVExifHeaderMode header_mode);
#endif /* AVCODEC_EXIF_INTERNAL_H */
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