mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 03:12:08 +00:00
58257ea29e
* qatar/master: (28 commits) mp3enc: write a xing frame containing number of frames in the file lavf: update AVStream.nb_frames when muxing. ffmpeg: remove unused variables from InputStream. doc: update ffmpeg -ar and -ac documentation to reflect reality. ffmpeg: remove pointless if (nb_input_files) ffmpeg: merge input_files_ts_offset into input_files. ffmpeg: merge input_codecs into input_streams. ffmpeg: drop AV prefixes from struct names. ffmpeg: deprecate loop_input and loop_output options gif: add loop private option. img2: add loop private option. AVOptions: in av_opt_find() don't return named constants unless unit is specified. x11grab: replace undocumented nomouse hackery with a private option. dict: extend documentation. lls: whitespace cosmetics docs: Use proper markup for a literal command line option docs: Remove a remark that isn't relevant any longer docs: Explain how to regenerate import libraries with MSVC tools docs: Mention that libraries for MSVC can be built with a cross compiler docs: Remove old docs that mention setting up a build environment with lib.exe ... Conflicts: doc/ffmpeg.texi doc/general.texi ffmpeg.c libavcodec/Makefile libavcodec/dnxhddata.c libavformat/mp3enc.c libavformat/utils.c libavutil/Makefile tests/copycooker.sh Merged-by: Michael Niedermayer <michaelni@gmx.at>
121 lines
4.6 KiB
C
121 lines
4.6 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.
|
|
* @deprecated
|
|
* AVDictionary is provided for compatibility with libav. It is both in
|
|
* implementation as well as API inefficient. It does not scale and is
|
|
* extremely slow with large dictionaries.
|
|
* It is recommended that new code uses our tree container from tree.c/h
|
|
* where applicable, which uses AVL trees to achieve O(log n) performance.
|
|
*/
|
|
|
|
#ifndef AVUTIL_DICT_H
|
|
#define AVUTIL_DICT_H
|
|
|
|
/**
|
|
* @defgroup dict_api Public Dictionary API
|
|
* @{
|
|
* Dictionaries are used for storing key:value pairs. To create
|
|
* an AVDictionary, simply pass an address of a NULL pointer to
|
|
* av_dict_set(). NULL can be used as an empty dictionary wherever
|
|
* a pointer to an AVDictionary is required.
|
|
* Use av_dict_get() to retrieve an entry or iterate over all
|
|
* entries and finally av_dict_free() to free the dictionary
|
|
* and all its contents.
|
|
*
|
|
* @code
|
|
* AVDictionary *d = NULL; // "create" an empty dictionary
|
|
* av_dict_set(&d, "foo", "bar", 0); // add an entry
|
|
*
|
|
* char *k = av_strdup("key"); // if your strings are already allocated,
|
|
* char *v = av_strdup("value"); // you can avoid copying them like this
|
|
* av_dict_set(&d, k, v, AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
|
|
*
|
|
* AVDictionaryEntry *t = NULL;
|
|
* while (t = av_dict_get(d, "", t, AV_DICT_IGNORE_SUFFIX)) {
|
|
* <....> // iterate over all entries in d
|
|
* }
|
|
*
|
|
* av_dict_free(&d);
|
|
* @endcode
|
|
*
|
|
* @}
|
|
*/
|
|
|
|
#define AV_DICT_MATCH_CASE 1
|
|
#define AV_DICT_IGNORE_SUFFIX 2
|
|
#define AV_DICT_DONT_STRDUP_KEY 4 /**< Take ownership of a key that's been
|
|
allocated with av_malloc() and children. */
|
|
#define AV_DICT_DONT_STRDUP_VAL 8 /**< Take ownership of a value that's been
|
|
allocated with av_malloc() and chilren. */
|
|
#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
|
|
* and all keys and values.
|
|
*/
|
|
void av_dict_free(AVDictionary **m);
|
|
|
|
#endif // AVUTIL_DICT_H
|