/* * copyright (c) 2009 Michael Niedermayer * * 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 */ #include <strings.h> #include "avformat.h" #include "metadata.h" AVMetadataTag * av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags) { unsigned int i, j; if(!m) return NULL; if(prev) i= prev - m->elems + 1; else i= 0; for(; i<m->count; i++){ const char *s= m->elems[i].key; if(flags & AV_METADATA_MATCH_CASE) for(j=0; s[j] == key[j] && key[j]; j++); else for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++); if(key[j]) continue; if(s[j] && !(flags & AV_METADATA_IGNORE_SUFFIX)) continue; return &m->elems[i]; } return NULL; } int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int flags) { AVMetadata *m= *pm; AVMetadataTag *tag= av_metadata_get(m, key, NULL, flags); if(!m) m=*pm= av_mallocz(sizeof(*m)); if(tag){ if (flags & AV_METADATA_DONT_OVERWRITE) return 0; av_free(tag->value); av_free(tag->key); *tag= m->elems[--m->count]; }else{ AVMetadataTag *tmp= av_realloc(m->elems, (m->count+1) * sizeof(*m->elems)); if(tmp){ m->elems= tmp; }else return AVERROR(ENOMEM); } if(value){ if(flags & AV_METADATA_DONT_STRDUP_KEY){ m->elems[m->count].key = key; }else m->elems[m->count].key = av_strdup(key ); if(flags & AV_METADATA_DONT_STRDUP_VAL){ m->elems[m->count].value= value; }else m->elems[m->count].value= av_strdup(value); m->count++; } if(!m->count) { av_free(m->elems); av_freep(pm); } return 0; } #if FF_API_OLD_METADATA2 void av_metadata_conv(AVFormatContext *ctx, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv) { return; } #endif void av_metadata_free(AVMetadata **pm) { AVMetadata *m= *pm; if(m){ while(m->count--){ av_free(m->elems[m->count].key); av_free(m->elems[m->count].value); } av_free(m->elems); } av_freep(pm); } void ff_metadata_conv(AVMetadata **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv) { /* TODO: use binary search to look up the two conversion tables if the tables are getting big enough that it would matter speed wise */ const AVMetadataConv *sc, *dc; AVMetadataTag *mtag = NULL; AVMetadata *dst = NULL; const char *key; if (d_conv == s_conv) return; while((mtag=av_metadata_get(*pm, "", mtag, AV_METADATA_IGNORE_SUFFIX))) { key = mtag->key; if (s_conv) for (sc=s_conv; sc->native; sc++) if (!strcasecmp(key, sc->native)) { key = sc->generic; break; } if (d_conv) for (dc=d_conv; dc->native; dc++) if (!strcasecmp(key, dc->generic)) { key = dc->native; break; } av_metadata_set2(&dst, key, mtag->value, 0); } av_metadata_free(pm); *pm = dst; } void ff_metadata_conv_ctx(AVFormatContext *ctx, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv) { int i; ff_metadata_conv(&ctx->metadata, d_conv, s_conv); for (i=0; i<ctx->nb_streams ; i++) ff_metadata_conv(&ctx->streams [i]->metadata, d_conv, s_conv); for (i=0; i<ctx->nb_chapters; i++) ff_metadata_conv(&ctx->chapters[i]->metadata, d_conv, s_conv); for (i=0; i<ctx->nb_programs; i++) ff_metadata_conv(&ctx->programs[i]->metadata, d_conv, s_conv); } void av_metadata_copy(AVMetadata **dst, AVMetadata *src, int flags) { AVMetadataTag *t = NULL; while ((t = av_metadata_get(src, "", t, AV_METADATA_IGNORE_SUFFIX))) av_metadata_set2(dst, t->key, t->value, flags); }