2 * Copyright (c) 2012 Clément Bœsch
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * MPlayer subtitles format demuxer
28 #include "subtitles.h"
31 FFDemuxSubtitlesQueue q;
34 static int mpsub_probe(AVProbeData *p)
36 const char *ptr = p->buf;
37 const char *ptr_end = p->buf + p->buf_size;
39 while (ptr < ptr_end) {
42 if (!memcmp(ptr, "FORMAT=TIME", 11) ||
43 sscanf(ptr, "FORMAT=%d", &n) == 1)
44 return AVPROBE_SCORE_MAX/2;
45 ptr += strcspn(ptr, "\n") + 1;
50 static int mpsub_read_header(AVFormatContext *s)
52 MPSubContext *mpsub = s->priv_data;
55 AVRational pts_info = (AVRational){ 100, 1 }; // ts based by default
57 float multiplier = 100.0;
58 float current_pts = 0;
60 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
62 while (!url_feof(s->pb)) {
64 float start, duration;
65 int fps, len = ff_get_line(s->pb, line, sizeof(line));
70 line[strcspn(line, "\r\n")] = 0;
72 if (sscanf(line, "FORMAT=%d", &fps) == 1 && fps > 3 && fps < 100) {
73 /* frame based timing */
74 pts_info = (AVRational){ fps, 1 };
76 } else if (sscanf(line, "%f %f", &start, &duration) == 2) {
78 const int64_t pos = avio_tell(s->pb);
80 ff_subtitles_read_chunk(s->pb, &buf);
82 sub = ff_subtitles_queue_insert(&mpsub->q, buf.str, buf.len, 0);
84 res = AVERROR(ENOMEM);
87 sub->pts = (int64_t)(current_pts + start*multiplier);
88 sub->duration = (int)(duration * multiplier);
89 current_pts += (start + duration) * multiplier;
95 st = avformat_new_stream(s, NULL);
97 return AVERROR(ENOMEM);
98 avpriv_set_pts_info(st, 64, pts_info.den, pts_info.num);
99 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
100 st->codec->codec_id = AV_CODEC_ID_TEXT;
102 ff_subtitles_queue_finalize(&mpsub->q);
105 av_bprint_finalize(&buf, NULL);
109 static int mpsub_read_packet(AVFormatContext *s, AVPacket *pkt)
111 MPSubContext *mpsub = s->priv_data;
112 return ff_subtitles_queue_read_packet(&mpsub->q, pkt);
115 static int mpsub_read_seek(AVFormatContext *s, int stream_index,
116 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
118 MPSubContext *mpsub = s->priv_data;
119 return ff_subtitles_queue_seek(&mpsub->q, s, stream_index,
120 min_ts, ts, max_ts, flags);
123 static int mpsub_read_close(AVFormatContext *s)
125 MPSubContext *mpsub = s->priv_data;
126 ff_subtitles_queue_clean(&mpsub->q);
130 AVInputFormat ff_mpsub_demuxer = {
132 .long_name = NULL_IF_CONFIG_SMALL("MPlayer subtitles"),
133 .priv_data_size = sizeof(MPSubContext),
134 .read_probe = mpsub_probe,
135 .read_header = mpsub_read_header,
136 .read_packet = mpsub_read_packet,
137 .read_seek2 = mpsub_read_seek,
138 .read_close = mpsub_read_close,