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2ba45a60 DM |
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 | }; |