The Image Metadata API provides functions that allow to get information about stored image files.

This file contains the image metadata API and related functions to proceed with them. Functions include cloning and destroying the image metadata, getting image metadata such as width, height,
orientation, date taken, title, burst shot id and updating image to DB.

Required Header

#include <media_content.h>

Overview

The Image Metadata API provides functions to get basic information associated with image files:

width
height
date taken (when image was created)
image orientation

For getting the image handle (image_meta_h) from the media information (media_info_h), call media_info_get_image() function.
For getting the information related to image files stored in the device call the respective get functions e.g. to get the width of a image, call image_meta_get_width() function and to get orientation (media_content_orientation_e) of a image, call image_meta_get_orientation() function and so on.
When the image handle is no longer needed, it should be destroyed by calling image_meta_destroy() function.

Functions
int	image_meta_clone (image_meta_h *dst, image_meta_h src)
	Clones the image metadata.
int	image_meta_destroy (image_meta_h image)
	Destroys the image metadata.
int	image_meta_get_media_id (image_meta_h image, char **media_id)
	Gets the ID of an image.
int	image_meta_get_width (image_meta_h image, int *width)
	Gets the image width in pixels.
int	image_meta_get_height (image_meta_h image, int *height)
	Gets the image height in pixels.
int	image_meta_get_orientation (image_meta_h image, media_content_orientation_e *orientation)
	Gets the image orientation.
int	image_meta_get_date_taken (image_meta_h image, char **date_taken)
	Gets the image creation time.
int	image_meta_get_burst_id (image_meta_h image, char **burst_id)
	Gets the burst shot ID.
int	image_meta_get_exposure_time (image_meta_h image, char **exposure_time)
	Gets the exposure time from exif.
int	image_meta_get_fnumber (image_meta_h image, double *fnumber)
	Gets the fnumber from exif.
int	image_meta_get_iso (image_meta_h image, int *iso)
	Gets the iso from exif.
int	image_meta_get_model (image_meta_h image, char **model)
	Gets the model from exif.
int	image_meta_is_burst_shot (image_meta_h image, bool *is_burst_shot)
	Checks whether the media is a burst shot image.
int	image_meta_set_orientation (image_meta_h image, media_content_orientation_e orientation)
	Sets an orientation of the image.
int	image_meta_update_to_db (image_meta_h image)
	Updates the image to the media database.
Typedefs
typedef struct image_meta_s *	image_meta_h
	The structure type for the Image metadata handle.

Typedef Documentation

typedef struct image_meta_s* image_meta_h

The structure type for the Image metadata handle.

Since :: 2.3

Function Documentation

int image_meta_clone	(	image_meta_h *	dst,
		image_meta_h	src
	)

Clones the image metadata.

The function copies the image metadata handle from a source to destination.

Since :: 2.3

Remarks:: The destination handle must be released with image_meta_destroy().

Parameters:

[out]	dst	The destination handle to the image metadata
[in]	src	The source handle to the image metadata

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIA_CONTENT_ERROR_OUT_OF_MEMORY	Out of memory
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

See also:: image_meta_destroy()

int image_meta_destroy ( image_meta_h image )

Destroys the image metadata.

The function frees all resources related to the image metadata handle. This handle no longer can be used to perform any operation. A new handle has to be created before next usage.

Since :: 2.3

Parameters:

[in] image The image metadata handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

Precondition:: Get a copy of image_meta handle by calling image_meta_clone().

See also:: image_meta_clone()

int image_meta_get_burst_id	(	image_meta_h	image,
		char **	burst_id
	)

Gets the burst shot ID.

Since :: 2.3

Remarks:: You must release burst_id using free().

Parameters:

[in]	image	The image metadata handle
[out]	burst_id	The ID of burst shot\ n If burst_id is `NULL`, this is not burst shot

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_OUT_OF_MEMORY	Out of memory
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

int image_meta_get_date_taken	(	image_meta_h	image,
		char **	date_taken
	)

Gets the image creation time.

Since :: 2.3

Parameters:

[in]	image	The image metadata handle
[out]	date_taken	The time, when image was taken (in seconds, since the Epoch)

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

int image_meta_get_exposure_time	(	image_meta_h	image,
		char **	exposure_time
	)

Gets the exposure time from exif.

Since :: 2.4

Remarks:: exposure time must be released with free() by you.

Parameters:

[in]	image	The image metadata handle
[out]	exposure_time	The value of exposure_time, getting from exif

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_OUT_OF_MEMORY	Out of memory
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter

int image_meta_get_fnumber	(	image_meta_h	image,
		double *	fnumber
	)

Gets the fnumber from exif.

Since :: 2.4

Parameters:

[in]	image	The image metadata handle
[out]	fnumber	The value of fnumber, getting from exif

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_OUT_OF_MEMORY	Out of memory
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter

int image_meta_get_height	(	image_meta_h	image,
		int *	height
	)

Gets the image height in pixels.

Since :: 2.3

Parameters:

[in]	image	The image metadata handle
[out]	height	The image height in pixels

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

int image_meta_get_iso	(	image_meta_h	image,
		int *	iso
	)

Gets the iso from exif.

Since :: 2.4

Parameters:

[in]	image	The image metadata handle
[out]	iso	The value of iso, getting from exif

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_OUT_OF_MEMORY	Out of memory
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter

int image_meta_get_media_id	(	image_meta_h	image,
		char **	media_id
	)

Gets the ID of an image.

Since :: 2.3

Parameters:

[in]	image	The image metadata handle
[out]	media_id	The ID of an image

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

int image_meta_get_model	(	image_meta_h	image,
		char **	model
	)

Gets the model from exif.

Since :: 2.4

Remarks:: model must be released with free() by you.

Parameters:

[in]	image	The image metadata handle
[out]	model	The value of model, getting from exif

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_OUT_OF_MEMORY	Out of memory
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter

int image_meta_get_orientation	(	image_meta_h	image,
		media_content_orientation_e *	orientation
	)

Gets the image orientation.

Since :: 2.3

Parameters:

[in]	image	The image metadata handle
[out]	orientation	The image orientation

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

int image_meta_get_width	(	image_meta_h	image,
		int *	width
	)

Gets the image width in pixels.

Since :: 2.3

Parameters:

[in]	image	The image metadata handle
[out]	width	The image width in pixels

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

int image_meta_is_burst_shot	(	image_meta_h	image,
		bool *	is_burst_shot
	)

Checks whether the media is a burst shot image.

Since :: 2.3

Parameters:

[in]	image	The image metadata handle
[out]	is_burst_shot	`true` if the media is a burst shot image, otherwise `false` if the media is not a burst shot image

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

int image_meta_set_orientation	(	image_meta_h	image,
		media_content_orientation_e	orientation
	)

Sets an orientation of the image.

Since :: 2.3

Parameters:

[in]	image	The image metadata handle
[in]	orientation	The image orientation

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

Postcondition:: image_meta_update_to_db()

int image_meta_update_to_db ( image_meta_h image )

Updates the image to the media database.

The function updates the given image meta in the media database. The function should be called after any change in image attributes, to be updated to the media database. For example, after using image_meta_set_orientation() for setting the orientation of the image, the image_meta_update_to_db() function should be called so as to update the given image attributes in the media database.

Since :: 2.3

Privilege Level:: public

Privilege:: http://tizen.org/privilege/content.write

Remarks:: Do not call this function in callback function of foreach function like media_info_foreach_media_from_db().

Parameters:

[in] image The handle to the image

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIA_CONTENT_ERROR_NONE	Successful
MEDIA_CONTENT_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIA_CONTENT_ERROR_OUT_OF_MEMORY	Out of memory
MEDIA_CONTENT_ERROR_INVALID_OPERATION	Invalid operation
MEDIA_CONTENT_ERROR_DB_FAILED	DB Operation failed
MEDIA_CONTENT_ERROR_DB_BUSY	DB Operation busy
MEDIA_CONTENT_ERROR_NETWORK	Network fail
MEDIA_CONTENT_ERROR_PERMISSION_DENIED	Permission denied

Precondition:: This function requires opened connection to content service by media_content_connect().

See also:: media_content_connect(); image_meta_set_orientation()

Required Header

Overview

Functions

Typedefs

Typedef Documentation

Function Documentation