The Thumbnail Util API provides functions for creating the thumbnail from an input media file.

Required Header

#include <thumbnail_util.h>

Overview

The Thumbnail Util API allows you to create the thumbnail from a media file. To extract a thumbnail(thumbnail_util_extract()), create/destory the handle(thumbnail_util_create()/thumbnail_util_destroy). To set the path, width and height for extracting, and cancel thumbnail_util_cancel().

Functions
int	thumbnail_util_create (thumbnail_h *thumb)
	Creates thumbnail info handle.
int	thumbnail_util_extract (thumbnail_h thumb, thumbnail_extracted_cb callback, void user_data, char *request_id)
	Extracts the thumbnail for the given media, asynchronously.
int	thumbnail_util_set_path (thumbnail_h thumb, const char *path)
	Sets the path of original media file.
int	thumbnail_util_set_size (thumbnail_h thumb, int width, int height)
	Sets the size of thumbnail to be extracted.
int	thumbnail_util_cancel (thumbnail_h thumb, const char *request_id)
	Cancels the thumbnail extraction request for the given media.
int	thumbnail_util_cancel_all (thumbnail_h thumb) TIZEN_DEPRECATED_API
	Cancels all thumbnail extraction requests associated with the given thumbnail info handle.
int	thumbnail_util_destroy (thumbnail_h thumb)
	Destroys thumbnail info handle.
Typedefs
typedef struct thumbnail_s *	thumbnail_h
	The structure type for the thumbnail info handle.
typedef void(*	thumbnail_extracted_cb )(thumbnail_util_error_e error, const char request_id, int thumb_width, int thumb_height, unsigned char thumb_data, int thumb_size, void *user_data)
	Called when creating the thumbnail.
Defines
#define	THUMBNAIL_UTIL_ERROR_CLASS TIZEN_ERROR_THUMBNAIL_UTIL
	Definition for Thumbnail util Error Class.

Define Documentation

#define THUMBNAIL_UTIL_ERROR_CLASS TIZEN_ERROR_THUMBNAIL_UTIL

Definition for Thumbnail util Error Class.

Since :: 3.0

Typedef Documentation

typedef void(* thumbnail_extracted_cb)(thumbnail_util_error_e error, const char *request_id, int thumb_width, int thumb_height, unsigned char *thumb_data, int thumb_size, void *user_data)

Called when creating the thumbnail.

This callback is called for completion of generating the thumbnail. The following error codes can be received:
THUMBNAIL_UTIL_ERROR_NONE : Successful THUMBNAIL_UTIL_ERROR_INVALID_PARAMETER : Invalid parameter THUMBNAIL_UTIL_ERROR_PERMISSION_DENIED : Permission denied

Since :: 3.0

Remarks:: Color space of the generated thumbnail is BGRA.
The callback is called in a separate thread(not in the main loop).
The thumb_data should be released using free().

Parameters:

[in]	error	The error code
[in]	request_id	The generated request id by thumbnail extraction request
[in]	thumb_width	The width of the thumbnail which is generated
[in]	thumb_height	The height of the thumbnail which is generated
[in]	thumb_data	The raw data of the thumbnail which is generated
[in]	thumb_size	The size of the thumbnail which is generated
[in]	user_data	The user data passed from the thumbnail_util_extract() function

Precondition:: thumbnail_util_extract() calls this callback.

See also:: thumbnail_util_extract()

typedef struct thumbnail_s* thumbnail_h

The structure type for the thumbnail info handle.

Since :: 3.0

Enumeration Type Documentation

enum thumbnail_util_error_e

Enumeration for a thumbnail util error.

Since :: 3.0

Enumerator:

THUMBNAIL_UTIL_ERROR_NONE	Successful
THUMBNAIL_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
THUMBNAIL_UTIL_ERROR_OUT_OF_MEMORY	Out of memory
THUMBNAIL_UTIL_ERROR_INVALID_OPERATION	Invalid Operation
THUMBNAIL_UTIL_ERROR_FILE_NO_SPACE_ON_DEVICE	No space left on device
THUMBNAIL_UTIL_ERROR_PERMISSION_DENIED	Permission denied
THUMBNAIL_UTIL_ERROR_UNSUPPORTED_CONTENT	Unsupported Content (Since 4.0)

Function Documentation

int thumbnail_util_cancel	(	thumbnail_h	thumb,
		const char *	request_id
	)

Cancels the thumbnail extraction request for the given media.

Since :: 3.0

Remarks:: If there is no request to be canceled, this function returns THUMBNAIL_UTIL_ERROR_INVALID_OPERATION

Parameters:

[in]	thumb	The media thumbnail info handle
[in]	request_id	The generated request id by thumbnail extraction request

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

Return values:

THUMBNAIL_UTIL_ERROR_NONE	Successful
THUMBNAIL_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: It is available before thumbnail_extracted_cb() is called.

See also:: thumbnail_util_extract()

int thumbnail_util_cancel_all ( thumbnail_h thumb )

Cancels all thumbnail extraction requests associated with the given thumbnail info handle.

Deprecated:: Deprecated since 4.0. Use thumbnail_util_cancel() instead.

Since :: 3.0

Remarks:: If there is no item you want to cancel, this function return MEDIA_CONTENT_ERROR_INVALID_OPERATION

Parameters:

[in] thumb The media thumbnail info handle

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

Return values:

THUMBNAIL_UTIL_ERROR_NONE	Successful
THUMBNAIL_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: It is available before thumbnail_extracted_cb() is called.

See also:: thumbnail_util_extract()

int thumbnail_util_create ( thumbnail_h * thumb )

Creates thumbnail info handle.

Since :: 3.0

Remarks:: The thumb info should be released using thumbnail_util_destroy().

Parameters:

[in] thumb The handle to thumbnail info

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

Return values:

THUMBNAIL_UTIL_ERROR_NONE	Successful
THUMBNAIL_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
THUMBNAIL_UTIL_ERROR_OUT_OF_MEMORY	Not enough memory is available

See also:: thumbnail_util_destroy()

int thumbnail_util_destroy ( thumbnail_h thumb )

Destroys thumbnail info handle.

The function frees all resources related to the thumbnail info handle. This handle can no longer be used to perform any operation. New thumbnail info handle has to be created before the next usage.

Since :: 3.0

Parameters:

[in] thumb The thumbnail info handle

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

Return values:

THUMBNAIL_UTIL_ERROR_NONE	Successful
THUMBNAIL_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: Create a thumbnail info handle by calling thumbnail_util_create().

See also:: thumbnail_util_create()

int thumbnail_util_extract	(	thumbnail_h	thumb,
		thumbnail_extracted_cb	callback,
		void *	user_data,
		char **	request_id
	)

Extracts the thumbnail for the given media, asynchronously.

This function extracts the thumbnail for given media item and calls registered callback function for completion of extracting the thumbnail.
You can distinguish generated thumbnails by request_id. Therefore, the request_id must be maintained until the request is completed.
And the request_id is also used to cancel the request.

Since :: 3.0

Remarks:: The request_id should be released using free().
http://tizen.org/privilege/mediastorage is needed if input or output path are relevant to media storage.
http://tizen.org/privilege/externalstorage is needed if input or output path are relevant to external storage.
If you don't set the size, the thumbnail size will be set default size. Default size is 320x240.
Color space of the generated thumbnail is BGRA.
Since 3.0, http://tizen.org/privilege/content.write privilege is not required.

Parameters:

[in]	thumb	The thumbnail info handle
[in]	callback	The callback function to be invoked
[in]	user_data	The user data to be passed to the callback function
[out]	request_id	The request id for the thumbnail extraction request

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

Return values:

THUMBNAIL_UTIL_ERROR_NONE	Successful
THUMBNAIL_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
THUMBNAIL_UTIL_ERROR_PERMISSION_DENIED	Permission denied

Precondition:: Create a thumbnail info handle by calling thumbnail_util_create().
The content path that you want to generate thumbnail must be set by calling thumbnail_util_set_path().

Postcondition:: Thumbnail extraction result except canceled is provided by thumbnail_extracted_cb().

See also:: thumbnail_util_create(); thumbnail_util_set_path(); thumbnail_util_set_size(); thumbnail_extracted_cb(); thumbnail_util_cancel(); thumbnail_util_destroy()

int thumbnail_util_set_path	(	thumbnail_h	thumb,
		const char *	path
	)

Sets the path of original media file.

Since :: 3.0

Parameters:

[in]	thumb	The thumbnail info handle
[in]	path	The path of the original media file

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

Return values:

THUMBNAIL_UTIL_ERROR_NONE	Successful
THUMBNAIL_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: Create a thumbnail info handle by calling thumbnail_util_create().

See also:: thumbnail_util_create(); thumbnail_util_set_size(); thumbnail_util_destroy()

int thumbnail_util_set_size	(	thumbnail_h	thumb,
		int	width,
		int	height
	)

Sets the size of thumbnail to be extracted.

Since :: 3.0

Remarks:: If you don't set the size, the thumbnail size will be set default size. Default size is 320x240.
If the set width is not a multiple of 8, it can be changed by inner process. the width will be a multiple of 8 greater than the set value.

Parameters:

[in]	thumb	The thumbnail info handle
[in]	width	The width of the thumbnail
[in]	height	The height of the thumbnail

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

Return values:

THUMBNAIL_UTIL_ERROR_NONE	Successful
THUMBNAIL_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: Create a thumbnail info handle by calling thumbnail_util_create().

See also:: thumbnail_util_create(); thumbnail_util_set_path(); thumbnail_util_destroy()

Required Header

Overview

Functions

Typedefs

Defines

Define Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation