FFmpeg
Main Page
Related Pages
Modules
Namespaces
Data Structures
Files
Examples
File List
Globals
All
Data Structures
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Macros
Groups
Pages
libavformat
vplayerdec.c
Go to the documentation of this file.
1
/*
2
* Copyright (c) 2012 Clément Bœsch
3
*
4
* This file is part of FFmpeg.
5
*
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.
10
*
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.
15
*
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
19
*/
20
21
/**
22
* @file
23
* VPlayer subtitles format demuxer
24
*/
25
26
#include "
avformat.h
"
27
#include "
internal.h
"
28
#include "
subtitles.h
"
29
30
typedef
struct
{
31
FFDemuxSubtitlesQueue
q
;
32
}
VPlayerContext
;
33
34
static
int
vplayer_probe
(
AVProbeData
*p)
35
{
36
char
c
;
37
const
unsigned
char
*ptr = p->
buf
;
38
39
if
(sscanf(ptr,
"%*d:%*d:%*d.%*d%c"
, &c) == 1 && strchr(
": ="
, c))
40
return
AVPROBE_SCORE_MAX
;
41
return
0;
42
}
43
44
static
int64_t
read_ts
(
char
**
line
)
45
{
46
char
c
;
47
int
hh, mm, ss, ms,
len
;
48
49
if
(sscanf(*line,
"%d:%d:%d.%d%c%n"
,
50
&hh, &mm, &ss, &ms, &c, &len) >= 5) {
51
*line +=
len
;
52
return
(hh*3600LL + mm*60LL + ss) * 100LL + ms;
53
}
54
return
AV_NOPTS_VALUE
;
55
}
56
57
static
int
vplayer_read_header
(
AVFormatContext
*
s
)
58
{
59
VPlayerContext
*vplayer = s->
priv_data
;
60
AVStream
*st =
avformat_new_stream
(s, NULL);
61
62
if
(!st)
63
return
AVERROR
(ENOMEM);
64
avpriv_set_pts_info
(st, 64, 1, 100);
65
st->
codec
->
codec_type
=
AVMEDIA_TYPE_SUBTITLE
;
66
st->
codec
->
codec_id
=
AV_CODEC_ID_VPLAYER
;
67
68
while
(!
url_feof
(s->
pb
)) {
69
char
line
[4096];
70
char
*p = line;
71
const
int64_t pos =
avio_tell
(s->
pb
);
72
int
len
=
ff_get_line
(s->
pb
, line,
sizeof
(line));
73
int64_t pts_start;
74
75
if
(!len)
76
break
;
77
78
line[strcspn(line,
"\r\n"
)] = 0;
79
80
pts_start =
read_ts
(&p);
81
if
(pts_start !=
AV_NOPTS_VALUE
) {
82
AVPacket
*sub;
83
84
sub =
ff_subtitles_queue_insert
(&vplayer->
q
, p, strlen(p), 0);
85
if
(!sub)
86
return
AVERROR
(ENOMEM);
87
sub->
pos
= pos;
88
sub->
pts
= pts_start;
89
sub->
duration
= -1;
90
}
91
}
92
93
ff_subtitles_queue_finalize
(&vplayer->
q
);
94
return
0;
95
}
96
97
static
int
vplayer_read_packet
(
AVFormatContext
*
s
,
AVPacket
*
pkt
)
98
{
99
VPlayerContext
*vplayer = s->
priv_data
;
100
return
ff_subtitles_queue_read_packet
(&vplayer->
q
, pkt);
101
}
102
103
static
int
vplayer_read_seek
(
AVFormatContext
*
s
,
int
stream_index,
104
int64_t min_ts, int64_t ts, int64_t max_ts,
int
flags
)
105
{
106
VPlayerContext
*vplayer = s->
priv_data
;
107
return
ff_subtitles_queue_seek
(&vplayer->
q
, s, stream_index,
108
min_ts, ts, max_ts, flags);
109
}
110
111
static
int
vplayer_read_close
(
AVFormatContext
*
s
)
112
{
113
VPlayerContext
*vplayer = s->
priv_data
;
114
ff_subtitles_queue_clean
(&vplayer->
q
);
115
return
0;
116
}
117
118
AVInputFormat
ff_vplayer_demuxer
= {
119
.
name
=
"vplayer"
,
120
.long_name =
NULL_IF_CONFIG_SMALL
(
"VPlayer subtitles"
),
121
.priv_data_size =
sizeof
(
VPlayerContext
),
122
.
read_probe
=
vplayer_probe
,
123
.
read_header
=
vplayer_read_header
,
124
.
read_packet
=
vplayer_read_packet
,
125
.read_seek2 =
vplayer_read_seek
,
126
.
read_close
=
vplayer_read_close
,
127
.extensions =
"txt"
,
128
};
Generated on Wed Jul 10 2013 23:48:15 for FFmpeg by
1.8.2