exif-mnote-data.h File Reference

Handling EXIF MakerNote tags. More...

#include <libexif/exif-log.h>

Go to the source code of this file.

Typedefs
typedef struct _ExifMnoteData	ExifMnoteData
	Data found in the MakerNote tag.

Functions
void	exif_mnote_data_ref (ExifMnoteData *)
void	exif_mnote_data_unref (ExifMnoteData *)
void	exif_mnote_data_load (ExifMnoteData *d, const unsigned char *buf, unsigned int buf_siz)
	Load the MakerNote data from a memory buffer.
void	exif_mnote_data_save (ExifMnoteData *d, unsigned char **buf, unsigned int *buf_siz)
	Save the raw MakerNote data into a memory buffer.
unsigned int	exif_mnote_data_count (ExifMnoteData *d)
	Return the number of tags in the MakerNote.
unsigned int	exif_mnote_data_get_id (ExifMnoteData *d, unsigned int n)
	Return the MakerNote tag number for the tag at the specified index within the MakerNote.
const char *	exif_mnote_data_get_name (ExifMnoteData *d, unsigned int n)
	Returns textual name of the given MakerNote tag.
const char *	exif_mnote_data_get_title (ExifMnoteData *d, unsigned int n)
	Returns textual title of the given MakerNote tag.
const char *	exif_mnote_data_get_description (ExifMnoteData *d, unsigned int n)
	Returns verbose textual description of the given MakerNote tag.
char *	exif_mnote_data_get_value (ExifMnoteData *d, unsigned int n, char *val, unsigned int maxlen)
	Return a textual representation of the value of the MakerNote entry.
void	exif_mnote_data_log (ExifMnoteData *, ExifLog *)

Detailed Description

Handling EXIF MakerNote tags.

Function Documentation

unsigned int exif_mnote_data_count

(

ExifMnoteData *

d

)

Return the number of tags in the MakerNote.

Parameters

[in]

d

MakerNote data

Returns

number of tags, or 0 if no MakerNote or the type is not supported

const char* exif_mnote_data_get_description	(	ExifMnoteData *	d,
		unsigned int	n
	)

Returns verbose textual description of the given MakerNote tag.

Parameters

[in]	d	MakerNote data
[in]	n	index of the entry within the MakerNote data

Returns

textual description of the tag

unsigned int exif_mnote_data_get_id	(	ExifMnoteData *	d,
		unsigned int	n
	)

Return the MakerNote tag number for the tag at the specified index within the MakerNote.

Parameters

[in]	d	MakerNote data
[in]	n	index of the entry within the MakerNote data

Returns

MakerNote tag number

const char* exif_mnote_data_get_name	(	ExifMnoteData *	d,
		unsigned int	n
	)

Returns textual name of the given MakerNote tag.

The name is a short, unique (within this type of MakerNote), non-localized text string containing only US-ASCII alphanumeric characters.

Parameters

[in]	d	MakerNote data
[in]	n	index of the entry within the MakerNote data

Returns

textual name of the tag

const char* exif_mnote_data_get_title	(	ExifMnoteData *	d,
		unsigned int	n
	)

Returns textual title of the given MakerNote tag.

The title is a short, localized textual description of the tag.

Parameters

[in]	d	MakerNote data
[in]	n	index of the entry within the MakerNote data

Returns

textual name of the tag

char* exif_mnote_data_get_value	(	ExifMnoteData *	d,
		unsigned int	n,
		char *	val,
		unsigned int	maxlen
	)

Return a textual representation of the value of the MakerNote entry.

Warning

The character set of the returned string may be in the encoding of the current locale or the native encoding of the camera.

Parameters

[in]	d	MakerNote data
[in]	n	index of the entry within the MakerNote data
[out]	val	buffer in which to store value
[in]	maxlen	length of the buffer val

Returns

val pointer, or NULL on error

void exif_mnote_data_load	(	ExifMnoteData *	d,
		const unsigned char *	buf,
		unsigned int	buf_siz
	)

Load the MakerNote data from a memory buffer.

Parameters

[in]	d	MakerNote data
[in]	buf	pointer to raw MakerNote tag data
[in]	buf_siz	number of bytes of data at buf

void exif_mnote_data_save	(	ExifMnoteData *	d,
		unsigned char **	buf,
		unsigned int *	buf_siz
	)

Save the raw MakerNote data into a memory buffer.

The buffer is allocated by this function and must subsequently be freed by the caller.

Parameters

[in,out]	d	extract the data from this structure
[out]	buf	pointer to buffer pointer containing MakerNote data on return
[out]	buf_siz	pointer to the size of the buffer