aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* 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);
}
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