/*
  * 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 "avformat.h"

 #include "metadata.h"

 #include "libavutil/dict.h"

 #include "libavutil/avstring.h"

 void ff_metadata_conv(AVDictionary **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;

     AVDictionaryEntry *mtag = NULL;
     AVDictionary *dst = NULL;

     const char *key;

     if (d_conv == s_conv || !pm)

         return;
 

     while ((mtag = av_dict_get(*pm, "", mtag, AV_DICT_IGNORE_SUFFIX))) {

         key = mtag->key;

         if (s_conv)
             for (sc=s_conv; sc->native; sc++)

                 if (!av_strcasecmp(key, sc->native)) {

                     key = sc->generic;
                     break;
                 }
         if (d_conv)
             for (dc=d_conv; dc->native; dc++)

                 if (!av_strcasecmp(key, dc->generic)) {

                     key = dc->native;
                     break;
                 }

         av_dict_set(&dst, key, mtag->value, 0);

     }

     av_dict_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);

 }