79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
/*
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file Public dictionary API.
|
|
*/
|
|
|
|
#ifndef AVUTIL_DICT_H
|
|
#define AVUTIL_DICT_H
|
|
|
|
#define AV_DICT_MATCH_CASE 1
|
|
#define AV_DICT_IGNORE_SUFFIX 2
|
|
#define AV_DICT_DONT_STRDUP_KEY 4
|
|
#define AV_DICT_DONT_STRDUP_VAL 8
|
|
#define AV_DICT_DONT_OVERWRITE 16 ///< Don't overwrite existing entries.
|
|
|
|
typedef struct {
|
|
char *key;
|
|
char *value;
|
|
} AVDictionaryEntry;
|
|
|
|
typedef struct AVDictionary AVDictionary;
|
|
|
|
/**
|
|
* Get a dictionary entry with matching key.
|
|
*
|
|
* @param prev Set to the previous matching element to find the next.
|
|
* If set to NULL the first matching element is returned.
|
|
* @param flags Allows case as well as suffix-insensitive comparisons.
|
|
* @return Found entry or NULL, changing key or value leads to undefined behavior.
|
|
*/
|
|
AVDictionaryEntry *
|
|
av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags);
|
|
|
|
/**
|
|
* Set the given entry in *pm, overwriting an existing entry.
|
|
*
|
|
* @param pm pointer to a pointer to a dictionary struct. If *pm is NULL
|
|
* a dictionary struct is allocated and put in *pm.
|
|
* @param key entry key to add to *pm (will be av_strduped depending on flags)
|
|
* @param value entry value to add to *pm (will be av_strduped depending on flags).
|
|
* Passing a NULL value will cause an existing tag to be deleted.
|
|
* @return >= 0 on success otherwise an error code <0
|
|
*/
|
|
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags);
|
|
|
|
/**
|
|
* Copy entries from one AVDictionary struct into another.
|
|
* @param dst pointer to a pointer to a AVDictionary struct. If *dst is NULL,
|
|
* this function will allocate a struct for you and put it in *dst
|
|
* @param src pointer to source AVDictionary struct
|
|
* @param flags flags to use when setting entries in *dst
|
|
* @note metadata is read using the AV_DICT_IGNORE_SUFFIX flag
|
|
*/
|
|
void av_dict_copy(AVDictionary **dst, AVDictionary *src, int flags);
|
|
|
|
/**
|
|
* Free all the memory allocated for an AVDictionary struct.
|
|
*/
|
|
void av_dict_free(AVDictionary **m);
|
|
|
|
#endif // AVUTIL_DICT_H
|