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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/*
* 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
* AQTitle subtitles format demuxer
*
* @see http://web.archive.org/web/20070210095721/http://www.volny.cz/aberka/czech/aqt.html
* @see https://trac.annodex.net/wiki/AQTitle
*/
#include "avformat.h"
#include "internal.h"
#include "subtitles.h"
#include "libavutil/opt.h"
typedef struct {
const AVClass *class;
FFDemuxSubtitlesQueue q;
AVRational frame_rate;
} AQTitleContext;
static int aqt_probe(const AVProbeData *p)
{
int frame;
const char *ptr = p->buf;
if (sscanf(ptr, "-->> %d", &frame) == 1)
return AVPROBE_SCORE_EXTENSION;
return 0;
}
static int aqt_read_header(AVFormatContext *s)
{
AQTitleContext *aqt = s->priv_data;
AVStream *st = avformat_new_stream(s, NULL);
int new_event = 1;
int64_t pos = 0, frame = AV_NOPTS_VALUE;
AVPacket *sub = NULL;
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 64, aqt->frame_rate.den, aqt->frame_rate.num);
st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
st->codecpar->codec_id = AV_CODEC_ID_TEXT;
while (!avio_feof(s->pb)) {
char line[4096];
int len = ff_get_line(s->pb, line, sizeof(line));
if (!len)
break;
line[strcspn(line, "\r\n")] = 0;
if (sscanf(line, "-->> %"SCNd64, &frame) == 1) {
new_event = 1;
pos = avio_tell(s->pb);
if (sub) {
sub->duration = frame - sub->pts;
sub = NULL;
}
} else if (*line) {
if (!new_event) {
sub = ff_subtitles_queue_insert(&aqt->q, "\n", 1, 1);
if (!sub)
return AVERROR(ENOMEM);
}
sub = ff_subtitles_queue_insert(&aqt->q, line, strlen(line), !new_event);
if (!sub)
return AVERROR(ENOMEM);
if (new_event) {
sub->pts = frame;
sub->duration = -1;
sub->pos = pos;
}
new_event = 0;
}
}
ff_subtitles_queue_finalize(s, &aqt->q);
return 0;
}
static int aqt_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AQTitleContext *aqt = s->priv_data;
return ff_subtitles_queue_read_packet(&aqt->q, pkt);
}
static int aqt_read_seek(AVFormatContext *s, int stream_index,
int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
{
AQTitleContext *aqt = s->priv_data;
return ff_subtitles_queue_seek(&aqt->q, s, stream_index,
min_ts, ts, max_ts, flags);
}
static int aqt_read_close(AVFormatContext *s)
{
AQTitleContext *aqt = s->priv_data;
ff_subtitles_queue_clean(&aqt->q);
return 0;
}
#define OFFSET(x) offsetof(AQTitleContext, x)
#define SD AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_DECODING_PARAM
static const AVOption aqt_options[] = {
{ "subfps", "set the movie frame rate", OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, {.dbl=25}, 0, INT_MAX, SD },
{ NULL }
};
static const AVClass aqt_class = {
.class_name = "aqtdec",
.item_name = av_default_item_name,
.option = aqt_options,
.version = LIBAVUTIL_VERSION_INT,
};
const AVInputFormat ff_aqtitle_demuxer = {
.name = "aqtitle",
.long_name = NULL_IF_CONFIG_SMALL("AQTitle subtitles"),
.priv_data_size = sizeof(AQTitleContext),
.flags_internal = FF_FMT_INIT_CLEANUP,
.read_probe = aqt_probe,
.read_header = aqt_read_header,
.read_packet = aqt_read_packet,
.read_seek2 = aqt_read_seek,
.read_close = aqt_read_close,
.extensions = "aqt",
.priv_class = &aqt_class,
};
|
