| /* |
| * 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_set(AVMetadata **pm, const char *key, const char *value) |
| { |
| AVMetadata *m= *pm; |
| AVMetadataTag *tag= av_metadata_get(m, key, NULL, AV_METADATA_MATCH_CASE); |
| |
| if(!m) |
| m=*pm= av_mallocz(sizeof(*m)); |
| |
| if(tag){ |
| 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){ |
| m->elems[m->count].key = av_strdup(key ); |
| m->elems[m->count].value= av_strdup(value); |
| m->count++; |
| } |
| if(!m->count) { |
| av_free(m->elems); |
| av_freep(pm); |
| } |
| |
| return 0; |
| } |
| |
| 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); |
| } |
| |
| static void 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; |
| |
| while((mtag=av_metadata_get(*pm, "", mtag, AV_METADATA_IGNORE_SUFFIX))) { |
| key = mtag->key; |
| if (s_conv != d_conv) { |
| 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_set(&dst, key, mtag->value); |
| } |
| av_metadata_free(pm); |
| *pm = dst; |
| } |
| |
| void av_metadata_conv(AVFormatContext *ctx, const AVMetadataConv *d_conv, |
| const AVMetadataConv *s_conv) |
| { |
| int i; |
| metadata_conv(&ctx->metadata, d_conv, s_conv); |
| for (i=0; i<ctx->nb_streams ; i++) |
| metadata_conv(&ctx->streams [i]->metadata, d_conv, s_conv); |
| for (i=0; i<ctx->nb_chapters; i++) |
| metadata_conv(&ctx->chapters[i]->metadata, d_conv, s_conv); |
| for (i=0; i<ctx->nb_programs; i++) |
| metadata_conv(&ctx->programs[i]->metadata, d_conv, s_conv); |
| } |