EXIF metadata parser. More...

#include <inttypes.h>
#include "libavutil/attributes.h"
#include "libavutil/avconfig.h"
#include "libavutil/bprint.h"
#include "libavutil/display.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "bytestream.h"
#include "exif_internal.h"
#include "tiff_common.h"

Data Structures
struct	exif_tag

struct	exif_makernote_data

Macros
#define	EXIF_II_LONG 0x49492a00

#define	EXIF_MM_LONG 0x4d4d002a

#define	BASE_TAG_SIZE 12

#define	IFD_EXTRA_SIZE 6

#define	EXIF_TAG_NAME_LENGTH 32

#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

#define	MAKERNOTE_STRUCT(h, r)

#define	COLUMN_SEP(i, c)

#define	EXIF_COPY(fname, srcname)

Functions
const char *	av_exif_get_tag_name (uint16_t id)
	Retrieves the tag name associated with the provided tag ID.

int32_t	av_exif_get_tag_id (const char *name)
	Retrieves the tag ID associated with the provided tag string name.

static void	tput16 (PutByteContext *pb, const int le, const uint16_t value)

static void	tput32 (PutByteContext *pb, const int le, const uint32_t value)

static void	tput64 (PutByteContext *pb, const int le, const uint64_t value)

static int	exif_read_values (void logctx, GetByteContext gb, int le, AVExifEntry *entry)

static void	exif_write_values (PutByteContext pb, int le, const AVExifEntry entry)

static int	exif_get_makernote_offset (GetByteContext *gb)

static int	exif_parse_ifd_list (void logctx, GetByteContext gb, int le, int depth, AVExifMetadata *ifd, int guess)

static int	exif_decode_tag (void logctx, GetByteContext gb, int le, int depth, AVExifEntry *entry)

static void	exif_free_entry (AVExifEntry *entry)

void	av_exif_free (AVExifMetadata *ifd)
	Frees all resources associated with the given EXIF metadata struct.

static size_t	exif_get_ifd_size (const AVExifMetadata *ifd)

static int	exif_write_ifd (void logctx, PutByteContext pb, int le, int depth, const AVExifMetadata *ifd)

int	av_exif_write (void logctx, const AVExifMetadata ifd, AVBufferRef **buffer, enum AVExifHeaderMode header_mode)
	Allocates a buffer using av_malloc of an appropriate size and writes the EXIF data represented by ifd into that buffer.

int	av_exif_parse_buffer (void logctx, const uint8_t buf, size_t size, AVExifMetadata *ifd, enum AVExifHeaderMode header_mode)
	Decodes the EXIF data provided in the buffer and writes it into the struct *ifd.

static int	exif_ifd_to_dict (void logctx, const char prefix, const AVExifMetadata ifd, AVDictionary *metadata)

int	av_exif_ifd_to_dict (void logctx, const AVExifMetadata ifd, AVDictionary **metadata)
	Recursively reads all tags from the IFD and stores them in the provided metadata dictionary.

static int	exif_clone_entry (AVExifEntry dst, const AVExifEntry src)

static int	exif_get_entry (void logctx, AVExifMetadata ifd, uint16_t id, int depth, AVExifEntry **value)

int	av_exif_get_entry (void logctx, AVExifMetadata ifd, uint16_t id, int flags, AVExifEntry **value)
	Get an entry with the tagged ID from the EXIF metadata struct.

int	av_exif_set_entry (void logctx, AVExifMetadata ifd, uint16_t id, enum AVTiffDataType type, uint32_t count, const uint8_t ifd_lead, uint32_t ifd_offset, const void value)
	Add an entry to the provided EXIF metadata struct.

static int	exif_remove_entry (void logctx, AVExifMetadata ifd, uint16_t id, int depth)

int	av_exif_remove_entry (void logctx, AVExifMetadata ifd, uint16_t id, int flags)
	Remove an entry from the provided EXIF metadata struct.

AVExifMetadata *	av_exif_clone_ifd (const AVExifMetadata *ifd)
	Allocates a duplicate of the provided EXIF metadata struct.

int	av_exif_matrix_to_orientation (const int32_t *matrix)
	Convert a display matrix used by AV_FRAME_DATA_DISPLAYMATRIX into an orientation constant used by EXIF's orientation tag.

int	av_exif_orientation_to_matrix (int32_t *matrix, int orientation)
	Convert an orientation constant used by EXIF's orientation tag into a display matrix used by AV_FRAME_DATA_DISPLAYMATRIX.

int	ff_exif_sanitize_ifd (void logctx, const AVFrame frame, AVExifMetadata *ifd)
	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.

int	ff_exif_get_buffer (void logctx, const AVFrame frame, AVBufferRef **buffer_ptr, enum AVExifHeaderMode header_mode)
	Gets all relevant side data, collects it into an IFD, and writes it into the corresponding buffer pointer.

Variables
static const struct exif_tag	tag_list []

static const size_t	exif_sizes []

static const uint8_t	aoc_header [] = { 'A', 'O', 'C', 0, }

static const uint8_t	casio_header [] = { 'Q', 'V', 'C', 0, 0, 0, }

static const uint8_t	foveon_header [] = { 'F', 'O', 'V', 'E', 'O', 'N', 0, 0, }

static const uint8_t	fuji_header [] = { 'F', 'U', 'J', 'I', }

static const uint8_t	nikon_header [] = { 'N', 'i', 'k', 'o', 'n', 0, }

static const uint8_t	olympus1_header [] = { 'O', 'L', 'Y', 'M', 'P', 0, }

static const uint8_t	olympus2_header [] = { 'O', 'L', 'Y', 'M', 'P', 'U', 'S', 0, 'I', 'I', }

static const uint8_t	panasonic_header [] = { 'P', 'a', 'n', 'a', 's', 'o', 'n', 'i', 'c', 0, 0, 0, }

static const uint8_t	sigma_header [] = { 'S', 'I', 'G', 'M', 'A', 0, 0, 0, }

static const uint8_t	sony_header [] = { 'S', 'O', 'N', 'Y', ' ', 'D', 'S', 'C', ' ', 0, 0, 0, }

static const struct exif_makernote_data	makernote_data []

static const int	rotation_lut [2][4]

Detailed Description

EXIF metadata parser.

Author: Thilo Borgmann <thilo.borgmann at mail.de>; Leo Izen leo.i.nosp@m.zen@.nosp@m.gmail.nosp@m..com

Definition in file exif.c.

Macro Definition Documentation

◆ EXIF_II_LONG

#define EXIF_II_LONG 0x49492a00

Definition at line 43 of file exif.c.

Referenced by av_exif_write(), and exif_get_makernote_offset().

◆ EXIF_MM_LONG

#define EXIF_MM_LONG 0x4d4d002a

Definition at line 44 of file exif.c.

Referenced by exif_get_makernote_offset().

◆ BASE_TAG_SIZE

#define BASE_TAG_SIZE 12

Definition at line 46 of file exif.c.

Referenced by av_exif_write(), exif_decode_tag(), exif_get_ifd_size(), exif_get_makernote_offset(), exif_parse_ifd_list(), and exif_write_ifd().

◆ IFD_EXTRA_SIZE

#define IFD_EXTRA_SIZE 6

Definition at line 47 of file exif.c.

Referenced by exif_get_ifd_size(), and exif_write_ifd().

◆ EXIF_TAG_NAME_LENGTH

#define EXIF_TAG_NAME_LENGTH 32

Definition at line 49 of file exif.c.

◆ MAKERNOTE_TAG

#define MAKERNOTE_TAG 0x927c

Definition at line 50 of file exif.c.

Referenced by exif_decode_tag(), and exif_write_ifd().

◆ ORIENTATION_TAG

#define ORIENTATION_TAG 0x112

Definition at line 51 of file exif.c.

Referenced by ff_exif_sanitize_ifd().

◆ EXIFIFD_TAG

#define EXIFIFD_TAG 0x8769

Definition at line 52 of file exif.c.

Referenced by ff_exif_sanitize_ifd().

◆ IMAGE_WIDTH_TAG

#define IMAGE_WIDTH_TAG 0x100

Definition at line 53 of file exif.c.

Referenced by ff_exif_sanitize_ifd().

◆ IMAGE_LENGTH_TAG

#define IMAGE_LENGTH_TAG 0x101

Definition at line 54 of file exif.c.

Referenced by ff_exif_sanitize_ifd().

◆ PIXEL_X_TAG

#define PIXEL_X_TAG 0xa002

Definition at line 55 of file exif.c.

Referenced by ff_exif_sanitize_ifd().

◆ PIXEL_Y_TAG

#define PIXEL_Y_TAG 0xa003

Definition at line 56 of file exif.c.

Referenced by ff_exif_sanitize_ifd().

◆ MAKERNOTE_STRUCT

#define MAKERNOTE_STRUCT	(		h,
			r )

Value:

    { \
    .header = (h),               \
    .header_size = sizeof((h)),  \
    .result = (r),               \
}

Definition at line 433 of file exif.c.

◆ COLUMN_SEP

#define COLUMN_SEP	(		i,
			c )

Value:

((i) ? ((i) % (c) ? ", " : "\n") : "")

i

#define i(width, name, range_min, range_max)

Definition cbs_h264.c:63

c

static double c[64]

Definition vsrc_mptestsrc.c:89

Definition at line 963 of file exif.c.

Referenced by exif_ifd_to_dict().

◆ EXIF_COPY

#define EXIF_COPY	(		fname,
			srcname )

Value:

    do { \
    size_t sz; \
    if (av_size_mult(src->count, sizeof(*(fname)), &sz) < 0) { \
        ret = AVERROR(ENOMEM); \
        goto end; \
    } \
    (fname) = av_memdup((srcname), sz); \
    if (!(fname)) { \
        ret = AVERROR(ENOMEM); \
        goto end; \
    } \
} while (0)

Definition at line 1058 of file exif.c.

Referenced by exif_clone_entry().

Function Documentation

◆ av_exif_get_tag_name()

const char * av_exif_get_tag_name ( uint16_t id )

Retrieves the tag name associated with the provided tag ID.

If the tag ID is unknown, NULL is returned.

For example, av_exif_get_tag_name(0x112) returns "Orientation".

Definition at line 234 of file exif.c.

Referenced by exif_ifd_to_dict().

◆ av_exif_get_tag_id()

int32_t av_exif_get_tag_id ( const char * name )

Retrieves the tag ID associated with the provided tag string name.

If the tag name is unknown, a negative number is returned. Otherwise it always fits inside a uint16_t integer.

For example, av_exif_get_tag_id("Orientation") returns 274 (0x0112).

Definition at line 244 of file exif.c.

Referenced by exif_attach_ifd(), libjxl_attach_sidedata(), libjxl_preprocess_stream(), mov_parse_exif_item(), and side_data_exif_parse().

◆ tput16()

static void tput16	(	PutByteContext *	pb,
		const int	le,
		const uint16_t	value )

inlinestatic

Definition at line 257 of file exif.c.

Referenced by exif_write_ifd(), and exif_write_values().

◆ tput32()

static void tput32	(	PutByteContext *	pb,
		const int	le,
		const uint32_t	value )

inlinestatic

Definition at line 262 of file exif.c.

Referenced by av_exif_write(), exif_write_ifd(), and exif_write_values().

◆ tput64()

static void tput64	(	PutByteContext *	pb,
		const int	le,
		const uint64_t	value )

inlinestatic

Definition at line 267 of file exif.c.

Referenced by exif_write_values().

◆ exif_read_values()

static int exif_read_values	(	void *	logctx,
		GetByteContext *	gb,
		int	le,
		AVExifEntry *	entry )

static

Definition at line 272 of file exif.c.

Referenced by exif_decode_tag().

◆ exif_write_values()

static void exif_write_values	(	PutByteContext *	pb,
		int	le,
		const AVExifEntry *	entry )

static

Definition at line 365 of file exif.c.

Referenced by exif_write_ifd().

◆ exif_get_makernote_offset()

static int exif_get_makernote_offset ( GetByteContext * gb )

static

Definition at line 456 of file exif.c.

Referenced by exif_decode_tag().

◆ exif_parse_ifd_list()

static int exif_parse_ifd_list	(	void *	logctx,
		GetByteContext *	gb,
		int	le,
		int	depth,
		AVExifMetadata *	ifd,
		int	guess )

static

Definition at line 560 of file exif.c.

Referenced by av_exif_parse_buffer(), and exif_decode_tag().

◆ exif_decode_tag()

static int exif_decode_tag	(	void *	logctx,
		GetByteContext *	gb,
		int	le,
		int	depth,
		AVExifEntry *	entry )

static

Definition at line 480 of file exif.c.

Referenced by exif_parse_ifd_list().

◆ exif_free_entry()

static void exif_free_entry ( AVExifEntry * entry )

static

Definition at line 648 of file exif.c.

Referenced by av_exif_free(), av_exif_set_entry(), and exif_remove_entry().

◆ av_exif_free()

void av_exif_free ( AVExifMetadata * ifd )

Frees all resources associated with the given EXIF metadata struct.

Does not free the pointer passed itself, in case it is stack-allocated. The pointer passed to this function must be freed by the caller, if it is heap-allocated. Passing NULL is permitted.

Definition at line 659 of file exif.c.

Referenced by av_exif_clone_ifd(), av_exif_parse_buffer(), av_exif_write(), avi_extract_stream_metadata(), decode_frame(), exif_attach_ifd(), exif_clone_entry(), exif_free_entry(), exif_parse_ifd_list(), ff_decode_exif_attach_buffer(), ff_exif_get_buffer(), ff_exif_sanitize_ifd(), ff_mjpeg_decode_end(), ff_mjpeg_decode_frame_from_buf(), libjxl_attach_sidedata(), libjxl_preprocess_stream(), mov_parse_exif_item(), side_data_exif_parse(), and tiff_end().

◆ exif_get_ifd_size()

static size_t exif_get_ifd_size ( const AVExifMetadata * ifd )

static

Definition at line 677 of file exif.c.

Referenced by av_exif_write(), exif_get_ifd_size(), and exif_write_ifd().

◆ exif_write_ifd()

static int exif_write_ifd	(	void *	logctx,
		PutByteContext *	pb,
		int	le,
		int	depth,
		const AVExifMetadata *	ifd )

static

Definition at line 694 of file exif.c.

Referenced by av_exif_write(), and exif_write_ifd().

◆ av_exif_write()

int av_exif_write	(	void *	logctx,
		const AVExifMetadata *	ifd,
		AVBufferRef **	buffer,
		enum AVExifHeaderMode	header_mode )

Allocates a buffer using av_malloc of an appropriate size and writes the EXIF data represented by ifd into that buffer.

Upon error, *buffer will be NULL. The buffer becomes owned by the caller upon success. The *buffer argument must be NULL before calling.

Definition at line 753 of file exif.c.

Referenced by exif_attach_ifd(), ff_exif_get_buffer(), libjxl_preprocess_stream(), mov_parse_exif_item(), and side_data_exif_parse().

◆ av_exif_parse_buffer()

int av_exif_parse_buffer	(	void *	logctx,
		const uint8_t *	data,
		size_t	size,
		AVExifMetadata *	ifd,
		enum AVExifHeaderMode	header_mode )

Decodes the EXIF data provided in the buffer and writes it into the struct *ifd.

If this function succeeds, the IFD is owned by the caller and must be cleared after use by calling av_exif_free(); If this function fails and returns a negative value, it will call av_exif_free(ifd) before returning.

Definition at line 882 of file exif.c.

Referenced by avi_extract_stream_metadata(), decode_frame(), ff_decode_exif_attach_buffer(), ff_exif_get_buffer(), libjxl_attach_sidedata(), libjxl_preprocess_stream(), mjpeg_decode_app(), mov_parse_exif_item(), and side_data_exif_parse().

◆ exif_ifd_to_dict()

static int exif_ifd_to_dict	(	void *	logctx,
		const char *	prefix,
		const AVExifMetadata *	ifd,
		AVDictionary **	metadata )

static

Definition at line 965 of file exif.c.

Referenced by av_exif_ifd_to_dict(), and exif_ifd_to_dict().

◆ av_exif_ifd_to_dict()

int av_exif_ifd_to_dict	(	void *	logctx,
		const AVExifMetadata *	ifd,
		AVDictionary **	metadata )

Recursively reads all tags from the IFD and stores them in the provided metadata dictionary.

Definition at line 1053 of file exif.c.

Referenced by avi_extract_stream_metadata(), exif_attach_ifd(), and side_data_exif_parse().

◆ exif_clone_entry()

static int exif_clone_entry	(	AVExifEntry *	dst,
		const AVExifEntry *	src )

static

Definition at line 1071 of file exif.c.

Referenced by av_exif_clone_ifd(), and av_exif_set_entry().

◆ exif_get_entry()

static int exif_get_entry	(	void *	logctx,
		AVExifMetadata *	ifd,
		uint16_t	id,
		int	depth,
		AVExifEntry **	value )

static

Definition at line 1148 of file exif.c.

Referenced by av_exif_get_entry(), and exif_get_entry().

◆ av_exif_get_entry()

int av_exif_get_entry	(	void *	logctx,
		AVExifMetadata *	ifd,
		uint16_t	id,
		int	flags,
		AVExifEntry **	value )

Get an entry with the tagged ID from the EXIF metadata struct.

A pointer to the entry will be written into *value.

If the entry was present and returned successfully, a positive number is returned.

The positive number is equal to 1 plus the offset at which the entry was found. If the entry was found at the top level, this will be in the range of 1 to the number of entries in the IFD (inclusive). If the entry was found in a sub-IFD, then it will be a number greater than the number of entries in the top-level IFD.

If the entry was not found, *value is left untouched and zero is returned. If an error occurred, a negative AVERROR is returned.

Definition at line 1173 of file exif.c.

Referenced by av_exif_set_entry(), av_exif_write(), ff_exif_sanitize_ifd(), libjxl_preprocess_stream(), and side_data_exif_parse().

◆ av_exif_set_entry()

int av_exif_set_entry	(	void *	logctx,
		AVExifMetadata *	ifd,
		uint16_t	id,
		enum AVTiffDataType	type,
		uint32_t	count,
		const uint8_t *	ifd_lead,
		uint32_t	ifd_offset,
		const void *	value )

Add an entry to the provided EXIF metadata struct.

If one already exists with the provided ID, it will set the existing one to have the other information provided. Otherwise, it will allocate a new entry.

This function reallocates ifd->entries using av_fast_realloc and allocates (using av_malloc) a new value member of the entry, then copies the contents of value into that buffer.

Definition at line 1178 of file exif.c.

Referenced by av_exif_parse_buffer(), and ff_exif_sanitize_ifd().

◆ exif_remove_entry()

static int exif_remove_entry	(	void *	logctx,
		AVExifMetadata *	ifd,
		uint16_t	id,
		int	depth )

static

Definition at line 1235 of file exif.c.

Referenced by av_exif_remove_entry(), and exif_remove_entry().

◆ av_exif_remove_entry()

int av_exif_remove_entry	(	void *	logctx,
		AVExifMetadata *	ifd,
		uint16_t	id,
		int	flags )

Remove an entry from the provided EXIF metadata struct.

If the entry was present and removed successfully, a positive number is returned.

The positive number is equal to 1 plus the offset at which the entry was found. If the entry was found at the top level, this will be in the range of 1 to the number of entries in the IFD (inclusive). If the entry was found in a sub-IFD, then it will be a number greater than the number of entries in the top-level IFD. This refers to the state of the IFD before the entry was removed, e.g. if the last entry is removed, a 1 is returned, but the IFD has no entries anymore.

If the entry was not found, zero is returned and the IFD is left untouched. If an error occurred, a negative AVERROR is returned.

Definition at line 1272 of file exif.c.

Referenced by av_exif_write(), exif_attach_ifd(), libjxl_attach_sidedata(), libjxl_preprocess_stream(), mov_parse_exif_item(), and side_data_exif_parse().

◆ av_exif_clone_ifd()

AVExifMetadata * av_exif_clone_ifd ( const AVExifMetadata * ifd )

Allocates a duplicate of the provided EXIF metadata struct.

The caller owns the duplicate and must free it with av_exif_free. Returns NULL if the duplication process failed.

Definition at line 1277 of file exif.c.

Referenced by av_exif_write(), exif_attach_ifd(), and exif_clone_entry().

◆ av_exif_matrix_to_orientation()

int av_exif_matrix_to_orientation ( const int32_t * matrix )

Convert a display matrix used by AV_FRAME_DATA_DISPLAYMATRIX into an orientation constant used by EXIF's orientation tag.

Returns an EXIF orientation between 1 and 8 (inclusive) depending on the rotation and flip factors. Returns 0 if the matrix is singular.

Definition at line 1313 of file exif.c.

Referenced by encode_frame(), ff_exif_sanitize_ifd(), and libjxl_preprocess_stream().

◆ av_exif_orientation_to_matrix()

int av_exif_orientation_to_matrix	(	int32_t *	matrix,
		int	orientation )

Convert an orientation constant used by EXIF's orientation tag into a display matrix used by AV_FRAME_DATA_DISPLAYMATRIX.

Returns 0 on success and negative if the orientation is invalid, i.e. not between 1 and 8 (inclusive).

Definition at line 1326 of file exif.c.

Referenced by attach_displaymatrix(), libjxl_preprocess_stream(), and side_data_exif_parse().

◆ ff_exif_sanitize_ifd()

int ff_exif_sanitize_ifd	(	void *	logctx,
		const AVFrame *	frame,
		AVExifMetadata *	ifd )

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.

Definition at line 1364 of file exif.c.

Referenced by ff_exif_get_buffer(), and libjxl_preprocess_stream().

◆ ff_exif_get_buffer()

int ff_exif_get_buffer	(	void *	logctx,
		const AVFrame *	frame,
		AVBufferRef **	buffer,
		enum AVExifHeaderMode	header_mode )

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. The *buffer argument must be NULL before calling.

On success, a positive number is returned, and the buffer becomes owned by the caller. A negative AVERROR return value means that an error occurred. A zero return value means that there was no EXIF data to write. In both the negative and zero cases, *buffer will be NULL.

Definition at line 1493 of file exif.c.

Referenced by add_exif_profile_size().

Variable Documentation

◆ tag_list

const struct exif_tag tag_list[]

static

Definition at line 63 of file exif.c.

Referenced by amv_write_alist(), amv_write_vlist(), av_exif_get_tag_id(), av_exif_get_tag_name(), and main().

◆ exif_sizes

const size_t exif_sizes[]

static

Initial value:

= {
    [0] = 0,
    [AV_TIFF_BYTE] = 1,
    [AV_TIFF_STRING] = 1,
    [AV_TIFF_SHORT] = 2,
    [AV_TIFF_LONG] = 4,
    [AV_TIFF_RATIONAL] = 8,
    [AV_TIFF_SBYTE] = 1,
    [AV_TIFF_UNDEFINED] = 1,
    [AV_TIFF_SSHORT] = 2,
    [AV_TIFF_SLONG] = 4,
    [AV_TIFF_SRATIONAL] = 8,
    [AV_TIFF_FLOAT] = 4,
    [AV_TIFF_DOUBLE] = 8,
    [AV_TIFF_IFD] = 4,
}

Definition at line 217 of file exif.c.

Referenced by exif_decode_tag(), exif_get_ifd_size(), exif_read_values(), and exif_write_ifd().

◆ aoc_header

const uint8_t aoc_header[] = { 'A', 'O', 'C', 0, }

static

Definition at line 416 of file exif.c.

◆ casio_header

const uint8_t casio_header[] = { 'Q', 'V', 'C', 0, 0, 0, }

static

Definition at line 417 of file exif.c.

◆ foveon_header

const uint8_t foveon_header[] = { 'F', 'O', 'V', 'E', 'O', 'N', 0, 0, }

static

Definition at line 418 of file exif.c.

◆ fuji_header

const uint8_t fuji_header[] = { 'F', 'U', 'J', 'I', }

static

Definition at line 419 of file exif.c.

◆ nikon_header

const uint8_t nikon_header[] = { 'N', 'i', 'k', 'o', 'n', 0, }

static

Definition at line 420 of file exif.c.

Referenced by exif_get_makernote_offset().

◆ olympus1_header

const uint8_t olympus1_header[] = { 'O', 'L', 'Y', 'M', 'P', 0, }

static

Definition at line 421 of file exif.c.

◆ olympus2_header

const uint8_t olympus2_header[] = { 'O', 'L', 'Y', 'M', 'P', 'U', 'S', 0, 'I', 'I', }

static

Definition at line 422 of file exif.c.

◆ panasonic_header

const uint8_t panasonic_header[] = { 'P', 'a', 'n', 'a', 's', 'o', 'n', 'i', 'c', 0, 0, 0, }

static

Definition at line 423 of file exif.c.

◆ sigma_header

const uint8_t sigma_header[] = { 'S', 'I', 'G', 'M', 'A', 0, 0, 0, }

static

Definition at line 424 of file exif.c.

◆ sony_header

const uint8_t sony_header[] = { 'S', 'O', 'N', 'Y', ' ', 'D', 'S', 'C', ' ', 0, 0, 0, }

static

Definition at line 425 of file exif.c.

◆ makernote_data

const struct exif_makernote_data makernote_data[]

static

Initial value:

= {
    MAKERNOTE_STRUCT(aoc_header, 6),
    MAKERNOTE_STRUCT(casio_header, -1),
    MAKERNOTE_STRUCT(foveon_header, 10),
    MAKERNOTE_STRUCT(fuji_header, -1),
    MAKERNOTE_STRUCT(olympus1_header, 8),
    MAKERNOTE_STRUCT(olympus2_header, -1),
    MAKERNOTE_STRUCT(panasonic_header, 12),
    MAKERNOTE_STRUCT(sigma_header, 10),
    MAKERNOTE_STRUCT(sony_header, 12),
}

Definition at line 439 of file exif.c.

Referenced by exif_get_makernote_offset().

◆ rotation_lut

const int rotation_lut[2][4]

static

Initial value:

= {
    {1, 8, 3, 6}, {4, 7, 2, 5},
}

Definition at line 1309 of file exif.c.

Referenced by av_exif_matrix_to_orientation().

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ EXIF_II_LONG

◆ EXIF_MM_LONG

◆ BASE_TAG_SIZE

◆ IFD_EXTRA_SIZE

◆ EXIF_TAG_NAME_LENGTH

◆ MAKERNOTE_TAG

◆ ORIENTATION_TAG

◆ EXIFIFD_TAG

◆ IMAGE_WIDTH_TAG

◆ IMAGE_LENGTH_TAG

◆ PIXEL_X_TAG

◆ PIXEL_Y_TAG

◆ MAKERNOTE_STRUCT

◆ COLUMN_SEP

◆ EXIF_COPY

Function Documentation

◆ av_exif_get_tag_name()

◆ av_exif_get_tag_id()

◆ tput16()

◆ tput32()

◆ tput64()

◆ exif_read_values()

◆ exif_write_values()

◆ exif_get_makernote_offset()

◆ exif_parse_ifd_list()

◆ exif_decode_tag()

◆ exif_free_entry()

◆ av_exif_free()

◆ exif_get_ifd_size()

◆ exif_write_ifd()

◆ av_exif_write()

◆ av_exif_parse_buffer()

◆ exif_ifd_to_dict()

◆ av_exif_ifd_to_dict()

◆ exif_clone_entry()

◆ exif_get_entry()

◆ av_exif_get_entry()

◆ av_exif_set_entry()

◆ exif_remove_entry()

◆ av_exif_remove_entry()

◆ av_exif_clone_ifd()

◆ av_exif_matrix_to_orientation()

◆ av_exif_orientation_to_matrix()

◆ ff_exif_sanitize_ifd()

◆ ff_exif_get_buffer()

Variable Documentation

◆ tag_list

◆ exif_sizes

◆ aoc_header

◆ casio_header

◆ foveon_header

◆ fuji_header

◆ nikon_header

◆ olympus1_header

◆ olympus2_header

◆ panasonic_header

◆ sigma_header

◆ sony_header

◆ makernote_data

◆ rotation_lut