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/libavformat/metadata.c

http://github.com/FFmpeg/FFmpeg
C | 70 lines | 44 code | 5 blank | 21 comment | 13 complexity | c07c1b4ec2eb934d7bacf3743ee19e2e MD5 | raw file
 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
26void 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 || !pm)
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
59void 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}