exif-mnote-data.h
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/*! \file exif-mnote-data.h
* \brief Handling EXIF MakerNote tags
*/
/*
* Copyright (c) 2003 Lutz Mueller <lutz@users.sourceforge.net>
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*/
#ifndef __EXIF_MNOTE_DATA_H__
#define __EXIF_MNOTE_DATA_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include <libexif/exif-log.h>
/*! Data found in the MakerNote tag */
typedef struct _ExifMnoteData ExifMnoteData;
void exif_mnote_data_ref (ExifMnoteData *);
void exif_mnote_data_unref (ExifMnoteData *);
/*! Load the MakerNote data from a memory buffer.
*
* \param[in] d MakerNote data
* \param[in] buf pointer to raw MakerNote tag data
* \param[in] buf_size number of bytes of data at buf
*/
void exif_mnote_data_load (ExifMnoteData *d, const unsigned char *buf,
unsigned int buf_size);
/*!
* Save the raw MakerNote data into a memory buffer. The buffer is
* allocated by this function and must subsequently be freed by the
* caller.
*
* \param[in,out] d extract the data from this structure
* \param[out] buf pointer to buffer pointer containing MakerNote data on return
* \param[out] buf_size pointer to the size of the buffer
*/
void exif_mnote_data_save (ExifMnoteData *d, unsigned char **buf,
unsigned int *buf_size);
/*! Return the number of tags in the MakerNote.
*
* \param[in] d MakerNote data
* \return number of tags, or 0 if no MakerNote or the type is not supported
*/
unsigned int exif_mnote_data_count (ExifMnoteData *d);
/*! Return the MakerNote tag number for the tag at the specified index within
* the MakerNote.
*
* \param[in] d MakerNote data
* \param[in] n index of the entry within the MakerNote data
* \return MakerNote tag number
*/
unsigned int exif_mnote_data_get_id (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.
*
* \param[in] d MakerNote data
* \param[in] n index of the entry within the MakerNote data
* \return textual name of the tag or NULL on error
*/
const char *exif_mnote_data_get_name (ExifMnoteData *d, unsigned int n);
/*! Returns textual title of the given MakerNote tag.
* The title is a short, localized textual description of the tag.
*
* \param[in] d MakerNote data
* \param[in] n index of the entry within the MakerNote data
* \return textual name of the tag or NULL on error
*/
const char *exif_mnote_data_get_title (ExifMnoteData *d, unsigned int n);
/*! Returns verbose textual description of the given MakerNote tag.
*
* \param[in] d MakerNote data
* \param[in] n index of the entry within the MakerNote data
* \return textual description of the tag or NULL on error
*/
const char *exif_mnote_data_get_description (ExifMnoteData *d, unsigned int n);
/*! 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.
*
* \param[in] d MakerNote data
* \param[in] n index of the entry within the MakerNote data
* \param[out] val buffer in which to store value
* \param[in] maxlen length of the buffer val
* \return val pointer, or NULL on error
*/
char *exif_mnote_data_get_value (ExifMnoteData *d, unsigned int n, char *val, unsigned int maxlen);
void exif_mnote_data_log (ExifMnoteData *, ExifLog *);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __EXIF_MNOTE_DATA_H__ */