1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
* Copyright (c) 2012 Clément Bœsch
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* VPlayer subtitles format demuxer
*/
#include "avformat.h"
#include "internal.h"
#include "subtitles.h"
typedef struct {
FFDemuxSubtitlesQueue q;
} VPlayerContext;
static int vplayer_probe(const AVProbeData *p)
{
char c;
const unsigned char *ptr = p->buf;
if ((sscanf(ptr, "%*3d:%*2d:%*2d.%*2d%c", &c) == 1 ||
sscanf(ptr, "%*3d:%*2d:%*2d%c", &c) == 1) && strchr(": =", c))
return AVPROBE_SCORE_MAX;
return 0;
}
static int64_t read_ts(char **line)
{
char c;
int hh, mm, ss, ms, n, len;
if (((n = sscanf(*line, "%d:%d:%d.%d%c%n", &hh, &mm, &ss, &ms, &c, &len)) >= 5 ||
(n = sscanf(*line, "%d:%d:%d%c%n", &hh, &mm, &ss, &c, &len)) >= 4) && strchr(": =", c)) {
*line += len;
return (hh*3600LL + mm*60LL + ss) * 100LL + (n < 5 ? 0 : ms);
}
return AV_NOPTS_VALUE;
}
static int vplayer_read_header(AVFormatContext *s)
{
VPlayerContext *vplayer = s->priv_data;
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 64, 1, 100);
st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
st->codecpar->codec_id = AV_CODEC_ID_VPLAYER;
while (!avio_feof(s->pb)) {
char line[4096];
char *p = line;
const int64_t pos = avio_tell(s->pb);
int len = ff_get_line(s->pb, line, sizeof(line));
int64_t pts_start;
if (!len)
break;
line[strcspn(line, "\r\n")] = 0;
pts_start = read_ts(&p);
if (pts_start != AV_NOPTS_VALUE) {
AVPacket *sub;
sub = ff_subtitles_queue_insert(&vplayer->q, p, strlen(p), 0);
if (!sub)
return AVERROR(ENOMEM);
sub->pos = pos;
sub->pts = pts_start;
sub->duration = -1;
}
}
ff_subtitles_queue_finalize(s, &vplayer->q);
return 0;
}
const AVInputFormat ff_vplayer_demuxer = {
.name = "vplayer",
.long_name = NULL_IF_CONFIG_SMALL("VPlayer subtitles"),
.priv_data_size = sizeof(VPlayerContext),
.flags_internal = FF_FMT_INIT_CLEANUP,
.read_probe = vplayer_probe,
.read_header = vplayer_read_header,
.extensions = "txt",
.read_packet = ff_subtitles_read_packet,
.read_seek2 = ff_subtitles_read_seek,
.read_close = ff_subtitles_read_close,
};
|
