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/*
* VorbisComment writer
* Copyright (c) 2009 James Darnley
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "metadata.h"
#include "vorbiscomment.h"
#include "libavcodec/bytestream.h"
#include "libavutil/dict.h"
/**
* VorbisComment metadata conversion mapping.
* from Ogg Vorbis I format specification: comment field and header specification
* http://xiph.org/vorbis/doc/v-comment.html
*/
const AVMetadataConv ff_vorbiscomment_metadata_conv[] = {
{ "ALBUMARTIST", "album_artist"},
{ "TRACKNUMBER", "track" },
{ "DISCNUMBER", "disc" },
{ "DESCRIPTION", "comment" },
{ 0 }
};
int64_t ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string,
AVChapter **chapters, unsigned int nb_chapters)
{
int64_t len = 8;
len += strlen(vendor_string);
if (chapters && nb_chapters) {
for (int i = 0; i < nb_chapters; i++) {
AVDictionaryEntry *tag = NULL;
len += 4 + 12 + 1 + 10;
while ((tag = av_dict_get(chapters[i]->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
int64_t len1 = !strcmp(tag->key, "title") ? 4 : strlen(tag->key);
len += 4 + 10 + len1 + 1 + strlen(tag->value);
}
}
}
if (m) {
AVDictionaryEntry *tag = NULL;
while ((tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
len += 4 +strlen(tag->key) + 1 + strlen(tag->value);
}
}
return len;
}
int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m,
const char *vendor_string,
AVChapter **chapters, unsigned int nb_chapters)
{
int cm_count = 0;
bytestream_put_le32(p, strlen(vendor_string));
bytestream_put_buffer(p, vendor_string, strlen(vendor_string));
if (chapters && nb_chapters) {
for (int i = 0; i < nb_chapters; i++) {
cm_count += av_dict_count(chapters[i]->metadata) + 1;
}
}
if (*m) {
int count = av_dict_count(*m) + cm_count;
AVDictionaryEntry *tag = NULL;
bytestream_put_le32(p, count);
while ((tag = av_dict_get(*m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
int64_t len1 = strlen(tag->key);
int64_t len2 = strlen(tag->value);
if (len1+1+len2 > UINT32_MAX)
return AVERROR(EINVAL);
bytestream_put_le32(p, len1+1+len2);
bytestream_put_buffer(p, tag->key, len1);
bytestream_put_byte(p, '=');
bytestream_put_buffer(p, tag->value, len2);
}
for (int i = 0; i < nb_chapters; i++) {
AVChapter *chp = chapters[i];
char chapter_time[13];
char chapter_number[4];
int h, m, s, ms;
s = av_rescale(chp->start, chp->time_base.num, chp->time_base.den);
h = s / 3600;
m = (s / 60) % 60;
ms = av_rescale_q(chp->start, chp->time_base, av_make_q( 1, 1000)) % 1000;
s = s % 60;
snprintf(chapter_number, sizeof(chapter_number), "%03d", i);
snprintf(chapter_time, sizeof(chapter_time), "%02d:%02d:%02d.%03d", h, m, s, ms);
bytestream_put_le32(p, 10+1+12);
bytestream_put_buffer(p, "CHAPTER", 7);
bytestream_put_buffer(p, chapter_number, 3);
bytestream_put_byte(p, '=');
bytestream_put_buffer(p, chapter_time, 12);
tag = NULL;
while ((tag = av_dict_get(chapters[i]->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
int64_t len1 = !strcmp(tag->key, "title") ? 4 : strlen(tag->key);
int64_t len2 = strlen(tag->value);
if (len1+1+len2+10 > UINT32_MAX)
return AVERROR(EINVAL);
bytestream_put_le32(p, 10+len1+1+len2);
bytestream_put_buffer(p, "CHAPTER", 7);
bytestream_put_buffer(p, chapter_number, 3);
if (!strcmp(tag->key, "title"))
bytestream_put_buffer(p, "NAME", 4);
else
bytestream_put_buffer(p, tag->key, len1);
bytestream_put_byte(p, '=');
bytestream_put_buffer(p, tag->value, len2);
}
}
} else
bytestream_put_le32(p, 0);
return 0;
}
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