/*

 * 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;

    const AVDictionaryEntry *mtag = NULL;

    AVDictionary *dst = NULL;

    const char *key;

    if (d_conv == s_conv || !pm)

        return;

    while ((mtag = av_dict_iterate(*pm, mtag))) {

        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, AV_DICT_MULTIKEY | AV_DICT_DEDUP);

    }

    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);

}