Rename it to AVDictionary, since it will be used as such. Tags documentation and metadata conversion API is lavf-specific, so remains there.pull/2/head
Anton Khirnov
14 years ago
parent
ac4a854811
commit
d9f80ea2a7
9 changed files with 252 additions and 112 deletions
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/*
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* copyright (c) 2009 Michael Niedermayer |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <strings.h> |
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#include "dict.h" |
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#include "internal.h" |
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#include "mem.h" |
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AVDictionaryEntry * |
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av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags) |
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{ |
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unsigned int i, j; |
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if(!m) |
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return NULL; |
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if(prev) i= prev - m->elems + 1; |
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else i= 0; |
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for(; i<m->count; i++){ |
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const char *s= m->elems[i].key; |
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if(flags & AV_DICT_MATCH_CASE) for(j=0; s[j] == key[j] && key[j]; j++); |
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else for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++); |
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if(key[j]) |
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continue; |
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if(s[j] && !(flags & AV_DICT_IGNORE_SUFFIX)) |
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continue; |
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return &m->elems[i]; |
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} |
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return NULL; |
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} |
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int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags) |
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{ |
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AVDictionary *m = *pm; |
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AVDictionaryEntry *tag = av_dict_get(m, key, NULL, flags); |
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if(!m) |
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m = *pm = av_mallocz(sizeof(*m)); |
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if(tag) { |
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if (flags & AV_DICT_DONT_OVERWRITE) |
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return 0; |
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av_free(tag->value); |
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av_free(tag->key); |
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*tag = m->elems[--m->count]; |
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} else { |
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AVDictionaryEntry *tmp = av_realloc(m->elems, (m->count+1) * sizeof(*m->elems)); |
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if(tmp) { |
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m->elems = tmp; |
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} else |
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return AVERROR(ENOMEM); |
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} |
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if (value) { |
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if (flags & AV_DICT_DONT_STRDUP_KEY) { |
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m->elems[m->count].key = key; |
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} else |
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m->elems[m->count].key = av_strdup(key ); |
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if (flags & AV_DICT_DONT_STRDUP_VAL) { |
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m->elems[m->count].value = value; |
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} else |
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m->elems[m->count].value = av_strdup(value); |
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m->count++; |
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} |
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if (!m->count) { |
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av_free(m->elems); |
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av_freep(pm); |
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} |
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return 0; |
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} |
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void av_dict_free(AVDictionary **pm) |
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{ |
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AVDictionary *m = *pm; |
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if (m) { |
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while(m->count--) { |
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av_free(m->elems[m->count].key); |
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av_free(m->elems[m->count].value); |
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} |
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av_free(m->elems); |
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} |
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av_freep(pm); |
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} |
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void av_dict_copy(AVDictionary **dst, AVDictionary *src, int flags) |
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{ |
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AVDictionaryEntry *t = NULL; |
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while ((t = av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX))) |
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av_dict_set(dst, t->key, t->value, flags); |
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} |
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@ -0,0 +1,78 @@ |
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/*
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file Public dictionary API. |
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*/ |
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#ifndef AVUTIL_DICT_H |
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#define AVUTIL_DICT_H |
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#define AV_DICT_MATCH_CASE 1 |
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#define AV_DICT_IGNORE_SUFFIX 2 |
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#define AV_DICT_DONT_STRDUP_KEY 4 |
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#define AV_DICT_DONT_STRDUP_VAL 8 |
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#define AV_DICT_DONT_OVERWRITE 16 ///< Don't overwrite existing entries.
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typedef struct { |
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char *key; |
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char *value; |
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} AVDictionaryEntry; |
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typedef struct AVDictionary AVDictionary; |
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/**
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* Get a dictionary entry with matching key. |
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* |
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* @param prev Set to the previous matching element to find the next. |
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* If set to NULL the first matching element is returned. |
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* @param flags Allows case as well as suffix-insensitive comparisons. |
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* @return Found entry or NULL, changing key or value leads to undefined behavior. |
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*/ |
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AVDictionaryEntry * |
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av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags); |
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/**
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* Set the given entry in *pm, overwriting an existing entry. |
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* |
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* @param pm pointer to a pointer to a dictionary struct. If *pm is NULL |
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* a dictionary struct is allocated and put in *pm. |
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* @param key entry key to add to *pm (will be av_strduped depending on flags) |
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* @param value entry value to add to *pm (will be av_strduped depending on flags). |
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* Passing a NULL value will cause an existing tag to be deleted. |
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* @return >= 0 on success otherwise an error code <0 |
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*/ |
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int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags); |
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/**
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* Copy entries from one AVDictionary struct into another. |
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* @param dst pointer to a pointer to a AVDictionary struct. If *dst is NULL, |
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* this function will allocate a struct for you and put it in *dst |
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* @param src pointer to source AVDictionary struct |
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* @param flags flags to use when setting entries in *dst |
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* @note metadata is read using the AV_DICT_IGNORE_SUFFIX flag |
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*/ |
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void av_dict_copy(AVDictionary **dst, AVDictionary *src, int flags); |
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/**
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* Free all the memory allocated for an AVDictionary struct. |
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*/ |
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void av_dict_free(AVDictionary **m); |
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#endif // AVUTIL_DICT_H
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