configure: Consolidate rtsp/sdp deps to use _select
[libav.git] / libavformat / vorbiscomment.c
CommitLineData
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JD
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
27/**
28 * VorbisComment metadata conversion mapping.
29 * from Ogg Vorbis I format specification: comment field and header specification
30 * http://xiph.org/vorbis/doc/v-comment.html
31 */
32const AVMetadataConv ff_vorbiscomment_metadata_conv[] = {
33 { "ALBUMARTIST", "album_artist"},
34 { "TRACKNUMBER", "track" },
35 { 0 }
36};
37
38int ff_vorbiscomment_length(AVMetadata *m, const char *vendor_string,
39 unsigned *count)
40{
41 int len = 8;
42 len += strlen(vendor_string);
43 *count = 0;
44 if (m) {
45 AVMetadataTag *tag = NULL;
e66f8a53 46 while ((tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
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47 len += 4 +strlen(tag->key) + 1 + strlen(tag->value);
48 (*count)++;
49 }
50 }
51 return len;
52}
53
54int ff_vorbiscomment_write(uint8_t **p, AVMetadata *m,
55 const char *vendor_string, const unsigned count)
56{
57 bytestream_put_le32(p, strlen(vendor_string));
58 bytestream_put_buffer(p, vendor_string, strlen(vendor_string));
59 if (m) {
60 AVMetadataTag *tag = NULL;
61 bytestream_put_le32(p, count);
e66f8a53 62 while ((tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
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63 unsigned int len1 = strlen(tag->key);
64 unsigned int len2 = strlen(tag->value);
65 bytestream_put_le32(p, len1+1+len2);
66 bytestream_put_buffer(p, tag->key, len1);
67 bytestream_put_byte(p, '=');
68 bytestream_put_buffer(p, tag->value, len2);
69 }
70 } else
71 bytestream_put_le32(p, 0);
72 return 0;
73}