blob: a9adbb1d19c899afc7c939a1997750990ced394c
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 | |
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 | |
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 | |
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 | avio_flush(s->pb); |
58 | return 0; |
59 | } |
60 | |
61 | static int write_trailer(AVFormatContext *s) |
62 | { |
63 | int i; |
64 | |
65 | write_tags(s->pb, s->metadata); |
66 | |
67 | for (i = 0; i < s->nb_streams; i++) { |
68 | avio_write(s->pb, ID_STREAM, sizeof(ID_STREAM) - 1); |
69 | avio_w8(s->pb, '\n'); |
70 | write_tags(s->pb, s->streams[i]->metadata); |
71 | } |
72 | |
73 | for (i = 0; i < s->nb_chapters; i++) { |
74 | AVChapter *ch = s->chapters[i]; |
75 | avio_write(s->pb, ID_CHAPTER, sizeof(ID_CHAPTER) - 1); |
76 | avio_w8(s->pb, '\n'); |
77 | avio_printf(s->pb, "TIMEBASE=%d/%d\n", ch->time_base.num, ch->time_base.den); |
78 | avio_printf(s->pb, "START=%"PRId64"\n", ch->start); |
79 | avio_printf(s->pb, "END=%"PRId64"\n", ch->end); |
80 | write_tags(s->pb, ch->metadata); |
81 | } |
82 | |
83 | return 0; |
84 | } |
85 | |
86 | static int write_packet(AVFormatContext *s, AVPacket *pkt) |
87 | { |
88 | return 0; |
89 | } |
90 | |
91 | AVOutputFormat ff_ffmetadata_muxer = { |
92 | .name = "ffmetadata", |
93 | .long_name = NULL_IF_CONFIG_SMALL("FFmpeg metadata in text"), |
94 | .extensions = "ffmeta", |
95 | .write_header = write_header, |
96 | .write_packet = write_packet, |
97 | .write_trailer = write_trailer, |
98 | .flags = AVFMT_NOTIMESTAMPS | AVFMT_NOSTREAMS, |
99 | }; |
100 |