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(*
* AVDictionary
* copyright (c) 2011 Karl-Michael Schindler <karl-michael.schindler@web.de>
*
* 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
*
* This is a part of the Pascal port of ffmpeg.
*
* Conversion of libavutil/dict.h
* avutil version 52.66.100
*
*)
const
AV_DICT_MATCH_CASE = 1;
AV_DICT_IGNORE_SUFFIX = 2;
AV_DICT_DONT_STRDUP_KEY = 4; (**< Take ownership of a key that's been
allocated with av_malloc() or another memory allocation function. *)
AV_DICT_DONT_STRDUP_VAL = 8; (**< Take ownership of a value that's been
allocated with av_malloc() or another memory allocation function. *)
AV_DICT_DONT_OVERWRITE = 16; (**< Don't overwrite existing entries. *)
AV_DICT_APPEND = 32; (**< If the entry already exists, append to it. Note that no
delimiter is added, the strings are simply concatenated. *)
type
PAVDictionaryEntry = ^TAVDictionaryEntry;
TAVDictionaryEntry = record
key: PAnsiChar;
value: PAnsiChar;
end;
(* with the "help" of libavutil/internal.h: *)
PPAVDictionary = ^PAVDictionary;
PAVDictionary = ^TAVDictionary;
TAVDictionary = record
count: cint;
elems: PAVDictionaryEntry;
end;
(**
* Get a dictionary entry with matching key.
*
* The returned entry key or value must not be changed, or it will
* cause undefined behavior.
*
* To iterate through all the dictionary entries, you can set the matching key
* to the null string "" and set the AV_DICT_IGNORE_SUFFIX flag.
*
* @param key 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 a collection of AV_DICT_* flags controlling how the entry is retrieved
* @return found entry or NULL in case no matching entry was found in the dictionary
*)
function av_dict_get(m: PAVDictionary; {const} key: PAnsiChar; {const} prev: PAVDictionaryEntry; flags: cint): PAVDictionaryEntry;
cdecl; external av__util;
(**
* Get number of entries in dictionary.
*
* @param m dictionary
* @return number of entries in dictionary
*)
function av_dict_count({const} m: PAVDictionary): cint;
cdecl; external av__util;
(**
* 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 entry to be deleted.
* @return >= 0 on success otherwise an error code <0
*)
function av_dict_set(var pm: PAVDictionary; {const} key: PAnsiChar; {const} value: PAnsiChar; flags: cint): cint;
cdecl; external av__util;
(**
* Parse the key/value pairs list and add the parsed entries to a dictionary.
*
* In case of failure, all the successfully set entries are stored in
* *pm. You may need to manually free the created dictionary.
*
* @param key_val_sep a 0-terminated list of characters used to separate
* key from value
* @param pairs_sep a 0-terminated list of characters used to separate
* two pairs from each other
* @param flags flags to use when adding to dictionary.
* AV_DICT_DONT_STRDUP_KEY and AV_DICT_DONT_STRDUP_VAL
* are ignored since the key/value tokens will always
* be duplicated.
* @return 0 on success, negative AVERROR code on failure
*)
function av_dict_parse_string(var pm: PAVDictionary; {const} str: PAnsiChar;
{const} key_val_sep: PAnsiChar; {const} pairs_sep: PAnsiChar;
flags: cint): cint;
cdecl; external av__util;
(**
* 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
*)
procedure av_dict_copy(var dst: PAVDictionary; src: PAVDictionary; flags: cint);
cdecl; external av__util;
(**
* Free all the memory allocated for an AVDictionary struct
* and all keys and values.
*)
procedure av_dict_free(var m: PAVDictionary);
cdecl; external av__util;
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