3 * Copyright (c) 2009 James Darnley
5 * This file is part of FFmpeg.
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.
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.
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
24 #include "vorbiscomment.h"
25 #include "libavcodec/bytestream.h"
26 #include "libavutil/dict.h"
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
33 const AVMetadataConv ff_vorbiscomment_metadata_conv
[] = {
34 { "ALBUMARTIST", "album_artist"},
35 { "TRACKNUMBER", "track" },
36 { "DISCNUMBER", "disc" },
37 { "DESCRIPTION", "comment" },
41 int ff_vorbiscomment_length(AVDictionary
*m
, const char *vendor_string
)
44 len
+= strlen(vendor_string
);
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
);
54 int ff_vorbiscomment_write(uint8_t **p
, AVDictionary
**m
,
55 const char *vendor_string
)
57 bytestream_put_le32(p
, strlen(vendor_string
));
58 bytestream_put_buffer(p
, vendor_string
, strlen(vendor_string
));
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
);
72 bytestream_put_le32(p
, 0);