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libavformat
ffmetaenc.c
Go to the documentation of this file.
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/*
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* Metadata muxer
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* Copyright (c) 2010 Anton Khirnov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <inttypes.h>
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#include "
avformat.h
"
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#include "
ffmeta.h
"
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#include "
libavutil/dict.h
"
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static
void
write_escape_str
(
AVIOContext
*
s
,
const
uint8_t
*str)
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{
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const
uint8_t
*p = str;
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while
(*p) {
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if
(*p ==
'#'
|| *p ==
';'
|| *p ==
'='
|| *p ==
'\\'
|| *p ==
'\n'
)
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avio_w8
(s,
'\\'
);
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avio_w8
(s, *p);
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p++;
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}
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}
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static
void
write_tags
(
AVIOContext
*
s
,
AVDictionary
*
m
)
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{
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AVDictionaryEntry
*t =
NULL
;
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while
((t =
av_dict_get
(m,
""
, t,
AV_DICT_IGNORE_SUFFIX
))) {
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write_escape_str
(s, t->
key
);
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avio_w8
(s,
'='
);
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write_escape_str
(s, t->
value
);
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avio_w8
(s,
'\n'
);
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}
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}
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static
int
write_header
(
AVFormatContext
*
s
)
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{
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avio_write
(s->
pb
,
ID_STRING
,
sizeof
(
ID_STRING
) - 1);
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avio_w8
(s->
pb
,
'1'
);
// version
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avio_w8
(s->
pb
,
'\n'
);
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avio_flush
(s->
pb
);
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return
0;
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}
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static
int
write_trailer
(
AVFormatContext
*
s
)
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{
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int
i;
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write_tags
(s->
pb
, s->
metadata
);
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for
(i = 0; i < s->
nb_streams
; i++) {
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avio_write
(s->
pb
,
ID_STREAM
,
sizeof
(
ID_STREAM
) - 1);
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avio_w8
(s->
pb
,
'\n'
);
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write_tags
(s->
pb
, s->
streams
[i]->
metadata
);
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}
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for
(i = 0; i < s->
nb_chapters
; i++) {
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AVChapter
*ch = s->
chapters
[i];
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avio_write
(s->
pb
,
ID_CHAPTER
,
sizeof
(
ID_CHAPTER
) - 1);
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avio_w8
(s->
pb
,
'\n'
);
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avio_printf
(s->
pb
,
"TIMEBASE=%d/%d\n"
, ch->
time_base
.
num
, ch->
time_base
.
den
);
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avio_printf
(s->
pb
,
"START=%"
PRId64
"\n"
, ch->
start
);
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avio_printf
(s->
pb
,
"END=%"
PRId64
"\n"
, ch->
end
);
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write_tags
(s->
pb
, ch->
metadata
);
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}
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return
0;
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}
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static
int
write_packet
(
AVFormatContext
*
s
,
AVPacket
*
pkt
)
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{
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return
0;
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}
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AVOutputFormat
ff_ffmetadata_muxer
= {
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.
name
=
"ffmetadata"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"FFmpeg metadata in text"
),
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.extensions =
"ffmeta"
,
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.write_header =
write_header
,
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.write_packet =
write_packet
,
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.write_trailer =
write_trailer
,
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.flags =
AVFMT_NOTIMESTAMPS
|
AVFMT_NOSTREAMS
,
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};
Generated on Sun Mar 8 2015 02:35:09 for FFmpeg by
1.8.2