| /* |
| * |
| * 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 |