Move metadata API from lavf to lavu.
[libav.git] / libavformat / vorbiscomment.c
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1/*
2 * VorbisComment writer
3 * Copyright (c) 2009 James Darnley
4 *
2912e87a 5 * This file is part of Libav.
66061a12 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
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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 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 18 * License along with Libav; if not, write to the Free Software
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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" },
ec4913a8 35 { "DISCNUMBER", "disc" },
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36 { 0 }
37};
38
39int ff_vorbiscomment_length(AVMetadata *m, const char *vendor_string,
40 unsigned *count)
41{
42 int len = 8;
43 len += strlen(vendor_string);
44 *count = 0;
45 if (m) {
46 AVMetadataTag *tag = NULL;
e66f8a53 47 while ((tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
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48 len += 4 +strlen(tag->key) + 1 + strlen(tag->value);
49 (*count)++;
50 }
51 }
52 return len;
53}
54
81e5ff7a 55int ff_vorbiscomment_write(uint8_t **p, AVMetadata **m,
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56 const char *vendor_string, const unsigned count)
57{
58 bytestream_put_le32(p, strlen(vendor_string));
59 bytestream_put_buffer(p, vendor_string, strlen(vendor_string));
81e5ff7a 60 if (*m) {
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61 AVMetadataTag *tag = NULL;
62 bytestream_put_le32(p, count);
81e5ff7a 63 while ((tag = av_metadata_get(*m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
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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}