1 /*
2 * Metadata muxer
3 * Copyright (c) 2010 Anton Khirnov
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 <inttypes.h>
23
24 #include "avformat.h"
25 #include "ffmeta.h"
26 #include "libavutil/dict.h"
27
28
write_escape_str(AVIOContext * s,const uint8_t * str)29 static void write_escape_str(AVIOContext *s, const uint8_t *str)
30 {
31 const uint8_t *p = str;
32
33 while (*p) {
34 if (*p == '#' || *p == ';' || *p == '=' || *p == '\\' || *p == '\n')
35 avio_w8(s, '\\');
36 avio_w8(s, *p);
37 p++;
38 }
39 }
40
write_tags(AVIOContext * s,AVDictionary * m)41 static void write_tags(AVIOContext *s, AVDictionary *m)
42 {
43 AVDictionaryEntry *t = NULL;
44 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
45 write_escape_str(s, t->key);
46 avio_w8(s, '=');
47 write_escape_str(s, t->value);
48 avio_w8(s, '\n');
49 }
50 }
51
write_header(AVFormatContext * s)52 static int write_header(AVFormatContext *s)
53 {
54 avio_write(s->pb, ID_STRING, sizeof(ID_STRING) - 1);
55 avio_w8(s->pb, '1'); // version
56 avio_w8(s->pb, '\n');
57 return 0;
58 }
59
write_trailer(AVFormatContext * s)60 static int write_trailer(AVFormatContext *s)
61 {
62 int i;
63
64 write_tags(s->pb, s->metadata);
65
66 for (i = 0; i < s->nb_streams; i++) {
67 avio_write(s->pb, ID_STREAM, sizeof(ID_STREAM) - 1);
68 avio_w8(s->pb, '\n');
69 write_tags(s->pb, s->streams[i]->metadata);
70 }
71
72 for (i = 0; i < s->nb_chapters; i++) {
73 AVChapter *ch = s->chapters[i];
74 avio_write(s->pb, ID_CHAPTER, sizeof(ID_CHAPTER) - 1);
75 avio_w8(s->pb, '\n');
76 avio_printf(s->pb, "TIMEBASE=%d/%d\n", ch->time_base.num, ch->time_base.den);
77 avio_printf(s->pb, "START=%"PRId64"\n", ch->start);
78 avio_printf(s->pb, "END=%"PRId64"\n", ch->end);
79 write_tags(s->pb, ch->metadata);
80 }
81
82 return 0;
83 }
84
write_packet(AVFormatContext * s,AVPacket * pkt)85 static int write_packet(AVFormatContext *s, AVPacket *pkt)
86 {
87 return 0;
88 }
89
90 AVOutputFormat ff_ffmetadata_muxer = {
91 .name = "ffmetadata",
92 .long_name = NULL_IF_CONFIG_SMALL("FFmpeg metadata in text"),
93 .extensions = "ffmeta",
94 .write_header = write_header,
95 .write_packet = write_packet,
96 .write_trailer = write_trailer,
97 .flags = AVFMT_NOTIMESTAMPS | AVFMT_NOSTREAMS,
98 };
99