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89 lines
2.4 KiB
89 lines
2.4 KiB
/* |
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* copyright (c) 2009 Michael Niedermayer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "metadata.h" |
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AVMetadataTag * |
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av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *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_METADATA_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_METADATA_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_metadata_set(AVMetadata **pm, AVMetadataTag elem) |
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{ |
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AVMetadata *m= *pm; |
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AVMetadataTag *tag= av_metadata_get(m, elem.key, NULL, AV_METADATA_MATCH_CASE); |
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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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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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AVMetadataTag *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(elem.value){ |
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elem.key = av_strdup(elem.key ); |
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elem.value= av_strdup(elem.value); |
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m->elems[m->count++]= elem; |
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} |
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if(!m->count) |
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av_freep(pm); |
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return 0; |
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} |
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void av_metadata_free(AVMetadata **pm) |
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{ |
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AVMetadata *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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