1 /*
2 * VorbisComment writer
3 * Copyright (c) 2009 James Darnley
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "avformat.h"
23 #include "metadata.h"
24 #include "vorbiscomment.h"
25 #include "libavcodec/bytestream.h"
26 #include "libavutil/dict.h"
27
28 /**
29 * VorbisComment metadata conversion mapping.
30 * from Ogg Vorbis I format specification: comment field and header specification
31 * http://xiph.org/vorbis/doc/v-comment.html
32 */
33 const AVMetadataConv ff_vorbiscomment_metadata_conv[] = {
34 { "ALBUMARTIST", "album_artist"},
35 { "TRACKNUMBER", "track" },
36 { "DISCNUMBER", "disc" },
37 { "DESCRIPTION", "comment" },
38 { 0 }
39 };
40
ff_vorbiscomment_length(AVDictionary * m,const char * vendor_string)41 int ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string)
42 {
43 int len = 8;
44 len += strlen(vendor_string);
45 if (m) {
46 AVDictionaryEntry *tag = NULL;
47 while ((tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
48 len += 4 +strlen(tag->key) + 1 + strlen(tag->value);
49 }
50 }
51 return len;
52 }
53
ff_vorbiscomment_write(uint8_t ** p,AVDictionary ** m,const char * vendor_string)54 int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m,
55 const char *vendor_string)
56 {
57 bytestream_put_le32(p, strlen(vendor_string));
58 bytestream_put_buffer(p, vendor_string, strlen(vendor_string));
59 if (*m) {
60 int count = av_dict_count(*m);
61 AVDictionaryEntry *tag = NULL;
62 bytestream_put_le32(p, count);
63 while ((tag = av_dict_get(*m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
64 unsigned int len1 = strlen(tag->key);
65 unsigned int len2 = strlen(tag->value);
66 bytestream_put_le32(p, len1+1+len2);
67 bytestream_put_buffer(p, tag->key, len1);
68 bytestream_put_byte(p, '=');
69 bytestream_put_buffer(p, tag->value, len2);
70 }
71 } else
72 bytestream_put_le32(p, 0);
73 return 0;
74 }
75