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 return AVPROBE_SCORE_EXTENSION
;
44 if (!memcmp(ptr
, "FORMAT=", 7))
45 return AVPROBE_SCORE_EXTENSION
/ 3;
46 inc
= ff_subtitles_next_line(ptr
);
54 static int mpsub_read_header(AVFormatContext
*s
)
56 MPSubContext
*mpsub
= s
->priv_data
;
59 AVRational pts_info
= (AVRational
){ 100, 1 }; // ts based by default
61 float multiplier
= 100.0;
62 float current_pts
= 0;
64 av_bprint_init(&buf
, 0, AV_BPRINT_SIZE_UNLIMITED
);
66 while (!avio_feof(s
->pb
)) {
68 float start
, duration
;
69 int fps
, len
= ff_get_line(s
->pb
, line
, sizeof(line
));
74 line
[strcspn(line
, "\r\n")] = 0;
76 if (sscanf(line
, "FORMAT=%d", &fps
) == 1 && fps
> 3 && fps
< 100) {
77 /* frame based timing */
78 pts_info
= (AVRational
){ fps
, 1 };
80 } else if (sscanf(line
, "%f %f", &start
, &duration
) == 2) {
82 const int64_t pos
= avio_tell(s
->pb
);
84 ff_subtitles_read_chunk(s
->pb
, &buf
);
86 sub
= ff_subtitles_queue_insert(&mpsub
->q
, buf
.str
, buf
.len
, 0);
88 res
= AVERROR(ENOMEM
);
91 sub
->pts
= (int64_t)(current_pts
+ start
*multiplier
);
92 sub
->duration
= (int)(duration
* multiplier
);
93 current_pts
+= (start
+ duration
) * multiplier
;
99 st
= avformat_new_stream(s
, NULL
);
101 return AVERROR(ENOMEM
);
102 avpriv_set_pts_info(st
, 64, pts_info
.den
, pts_info
.num
);
103 st
->codec
->codec_type
= AVMEDIA_TYPE_SUBTITLE
;
104 st
->codec
->codec_id
= AV_CODEC_ID_TEXT
;
106 ff_subtitles_queue_finalize(&mpsub
->q
);
109 av_bprint_finalize(&buf
, NULL
);
113 static int mpsub_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
115 MPSubContext
*mpsub
= s
->priv_data
;
116 return ff_subtitles_queue_read_packet(&mpsub
->q
, pkt
);
119 static int mpsub_read_seek(AVFormatContext
*s
, int stream_index
,
120 int64_t min_ts
, int64_t ts
, int64_t max_ts
, int flags
)
122 MPSubContext
*mpsub
= s
->priv_data
;
123 return ff_subtitles_queue_seek(&mpsub
->q
, s
, stream_index
,
124 min_ts
, ts
, max_ts
, flags
);
127 static int mpsub_read_close(AVFormatContext
*s
)
129 MPSubContext
*mpsub
= s
->priv_data
;
130 ff_subtitles_queue_clean(&mpsub
->q
);
134 AVInputFormat ff_mpsub_demuxer
= {
136 .long_name
= NULL_IF_CONFIG_SMALL("MPlayer subtitles"),
137 .priv_data_size
= sizeof(MPSubContext
),
138 .read_probe
= mpsub_probe
,
139 .read_header
= mpsub_read_header
,
140 .read_packet
= mpsub_read_packet
,
141 .read_seek2
= mpsub_read_seek
,
142 .read_close
= mpsub_read_close
,