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- /*
- *
- * 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.
- #define AV_DICT_APPEND 32 /**< If the entry already exists, append to it. Note that no
- delimiter is added, the strings are simply concatenated. */
- 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
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