FFmpeg: libavformat/metadata.c Source File

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libavformat

metadata.c

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1 /*

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 */

21 #include "avformat.h"

22 #include "metadata.h"

23 #include "libavutil/dict.h"

24 #include "libavutil/avstring.h"

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;

36 if (d_conv == s_conv || !pm)

37 return;

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 }

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 }

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