3 * Copyright (c) 2010 Anton Khirnov
5 * This file is part of FFmpeg.
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.
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.
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
25 #include "libavutil/dict.h"
27 static int probe(AVProbeData *p)
29 if(!memcmp(p->buf, ID_STRING, strlen(ID_STRING)))
30 return AVPROBE_SCORE_MAX;
34 static void get_line(AVIOContext *s, uint8_t *buf, int size)
40 while ((c = avio_r8(s))) {
52 } while (!url_feof(s) && (buf[0] == ';' || buf[0] == '#' || buf[0] == 0));
55 static AVChapter *read_chapter(AVFormatContext *s)
59 AVRational tb = {1, 1e9};
61 get_line(s->pb, line, sizeof(line));
63 if (sscanf(line, "TIMEBASE=%d/%d", &tb.num, &tb.den))
64 get_line(s->pb, line, sizeof(line));
65 if (!sscanf(line, "START=%"SCNd64, &start)) {
66 av_log(s, AV_LOG_ERROR, "Expected chapter start timestamp, found %s.\n", line);
67 start = (s->nb_chapters && s->chapters[s->nb_chapters - 1]->end != AV_NOPTS_VALUE) ?
68 s->chapters[s->nb_chapters - 1]->end : 0;
70 get_line(s->pb, line, sizeof(line));
72 if (!sscanf(line, "END=%"SCNd64, &end)) {
73 av_log(s, AV_LOG_ERROR, "Expected chapter end timestamp, found %s.\n", line);
77 return ff_new_chapter(s, s->nb_chapters, tb, start, end, NULL);
80 static uint8_t *unescape(uint8_t *buf, int size)
82 uint8_t *ret = av_malloc(size + 1);
83 uint8_t *p1 = ret, *p2 = buf;
88 while (p2 < buf + size) {
97 static int read_tag(uint8_t *line, AVDictionary **m)
99 uint8_t *key, *value, *p = line;
101 /* find first not escaped '=' */
114 if (!(key = unescape(line, p - line)))
115 return AVERROR(ENOMEM);
116 if (!(value = unescape(p + 1, strlen(p + 1)))) {
118 return AVERROR(ENOMEM);
121 av_dict_set(m, key, value, AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
125 static int read_header(AVFormatContext *s, AVFormatParameters *ap)
127 AVDictionary **m = &s->metadata;
130 while(!url_feof(s->pb)) {
131 get_line(s->pb, line, sizeof(line));
133 if (!memcmp(line, ID_STREAM, strlen(ID_STREAM))) {
134 AVStream *st = av_new_stream(s, 0);
139 st->codec->codec_type = AVMEDIA_TYPE_DATA;
140 st->codec->codec_id = CODEC_ID_FFMETADATA;
143 } else if (!memcmp(line, ID_CHAPTER, strlen(ID_CHAPTER))) {
144 AVChapter *ch = read_chapter(s);
156 s->duration = av_rescale_q(s->chapters[s->nb_chapters - 1]->end,
157 s->chapters[s->nb_chapters - 1]->time_base,
163 static int read_packet(AVFormatContext *s, AVPacket *pkt)
168 AVInputFormat ff_ffmetadata_demuxer = {
169 .name = "ffmetadata",
170 .long_name = NULL_IF_CONFIG_SMALL("FFmpeg metadata in text format"),
172 .read_header = read_header,
173 .read_packet = read_packet,