2 * copyright (c) 2009 Michael Niedermayer
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags)
33 if(prev) i= prev - m->elems + 1;
36 for(; i<m->count; i++){
37 const char *s= m->elems[i].key;
38 if(flags & AV_METADATA_MATCH_CASE) for(j=0; s[j] == key[j] && key[j]; j++);
39 else for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++);
42 if(s[j] && !(flags & AV_METADATA_IGNORE_SUFFIX))
49 int av_metadata_set(AVMetadata **pm, const char *key, const char *value)
52 AVMetadataTag *tag= av_metadata_get(m, key, NULL, AV_METADATA_MATCH_CASE);
55 m=*pm= av_mallocz(sizeof(*m));
60 *tag= m->elems[--m->count];
62 AVMetadataTag *tmp= av_realloc(m->elems, (m->count+1) * sizeof(*m->elems));
66 return AVERROR(ENOMEM);
69 m->elems[m->count].key = av_strdup(key );
70 m->elems[m->count].value= av_strdup(value);
81 void av_metadata_free(AVMetadata **pm)
87 av_free(m->elems[m->count].key);
88 av_free(m->elems[m->count].value);
95 static void metadata_conv(AVMetadata **pm, const AVMetadataConv *d_conv,
96 const AVMetadataConv *s_conv)
98 /* TODO: use binary search to look up the two conversion tables
99 if the tables are getting big enough that it would matter speed wise */
100 const AVMetadataConv *sc, *dc;
101 AVMetadataTag *mtag = NULL;
102 AVMetadata *dst = NULL;
105 while((mtag=av_metadata_get(*pm, "", mtag, AV_METADATA_IGNORE_SUFFIX))) {
107 if (s_conv != d_conv) {
109 for (sc=s_conv; sc->native; sc++)
110 if (!strcasecmp(key, sc->native)) {
115 for (dc=d_conv; dc->native; dc++)
116 if (!strcasecmp(key, dc->generic)) {
121 av_metadata_set(&dst, key, mtag->value);
123 av_metadata_free(pm);
127 void av_metadata_conv(AVFormatContext *ctx, const AVMetadataConv *d_conv,
128 const AVMetadataConv *s_conv)
131 metadata_conv(&ctx->metadata, d_conv, s_conv);
132 for (i=0; i<ctx->nb_streams ; i++)
133 metadata_conv(&ctx->streams [i]->metadata, d_conv, s_conv);
134 for (i=0; i<ctx->nb_chapters; i++)
135 metadata_conv(&ctx->chapters[i]->metadata, d_conv, s_conv);
136 for (i=0; i<ctx->nb_programs; i++)
137 metadata_conv(&ctx->programs[i]->metadata, d_conv, s_conv);