blob: 575dd133287d9dbf37d67c75a8d4e86c596996a9
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 | int64_t ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string) |
42 | { |
43 | int64_t 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 | int64_t len1 = strlen(tag->key); |
65 | int64_t len2 = strlen(tag->value); |
66 | if (len1+1+len2 > UINT32_MAX) |
67 | return AVERROR(EINVAL); |
68 | bytestream_put_le32(p, len1+1+len2); |
69 | bytestream_put_buffer(p, tag->key, len1); |
70 | bytestream_put_byte(p, '='); |
71 | bytestream_put_buffer(p, tag->value, len2); |
72 | } |
73 | } else |
74 | bytestream_put_le32(p, 0); |
75 | return 0; |
76 | } |
77 |