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  1. /*
  2.  * copyright (c) 2009 Michael Niedermayer
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  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.
  10.  *
  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.
  15.  *
  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
  19.  */
  20.  
  21. #include "avformat.h"
  22. #include "metadata.h"
  23. #include "libavutil/dict.h"
  24. #include "libavutil/avstring.h"
  25.  
  26. void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv,
  27.                                        const AVMetadataConv *s_conv)
  28. {
  29.     /* TODO: use binary search to look up the two conversion tables
  30.        if the tables are getting big enough that it would matter speed wise */
  31.     const AVMetadataConv *sc, *dc;
  32.     AVDictionaryEntry *mtag = NULL;
  33.     AVDictionary *dst = NULL;
  34.     const char *key;
  35.  
  36.     if (d_conv == s_conv)
  37.         return;
  38.  
  39.     while ((mtag = av_dict_get(*pm, "", mtag, AV_DICT_IGNORE_SUFFIX))) {
  40.         key = mtag->key;
  41.         if (s_conv)
  42.             for (sc=s_conv; sc->native; sc++)
  43.                 if (!av_strcasecmp(key, sc->native)) {
  44.                     key = sc->generic;
  45.                     break;
  46.                 }
  47.         if (d_conv)
  48.             for (dc=d_conv; dc->native; dc++)
  49.                 if (!av_strcasecmp(key, dc->generic)) {
  50.                     key = dc->native;
  51.                     break;
  52.                 }
  53.         av_dict_set(&dst, key, mtag->value, 0);
  54.     }
  55.     av_dict_free(pm);
  56.     *pm = dst;
  57. }
  58.  
  59. void ff_metadata_conv_ctx(AVFormatContext *ctx, const AVMetadataConv *d_conv,
  60.                                                 const AVMetadataConv *s_conv)
  61. {
  62.     int i;
  63.     ff_metadata_conv(&ctx->metadata, d_conv, s_conv);
  64.     for (i=0; i<ctx->nb_streams ; i++)
  65.         ff_metadata_conv(&ctx->streams [i]->metadata, d_conv, s_conv);
  66.     for (i=0; i<ctx->nb_chapters; i++)
  67.         ff_metadata_conv(&ctx->chapters[i]->metadata, d_conv, s_conv);
  68.     for (i=0; i<ctx->nb_programs; i++)
  69.         ff_metadata_conv(&ctx->programs[i]->metadata, d_conv, s_conv);
  70. }
  71.