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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 | ||
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 | ||
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 | } |