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
|
/*
Copyright (C) 2014-2016 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "text_subtitle_decoder.h"
#include "text_subtitle_content.h"
#include "subtitle_content.h"
#include <dcp/subtitle_string.h>
#include <boost/foreach.hpp>
#include <iostream>
using std::list;
using std::vector;
using std::string;
using std::cout;
using std::max;
using boost::shared_ptr;
using boost::optional;
using boost::dynamic_pointer_cast;
TextSubtitleDecoder::TextSubtitleDecoder (shared_ptr<const TextSubtitleContent> content)
: TextSubtitle (content)
, _next (0)
{
subtitle.reset (
new SubtitleDecoder (
this,
content->subtitle,
bind (&TextSubtitleDecoder::image_subtitles_during, this, _1, _2),
bind (&TextSubtitleDecoder::text_subtitles_during, this, _1, _2)
)
);
}
void
TextSubtitleDecoder::seek (ContentTime time, bool accurate)
{
subtitle->seek (time, accurate);
_next = 0;
while (_next < _subtitles.size() && ContentTime::from_seconds (_subtitles[_next].from.all_as_seconds ()) < time) {
++_next;
}
}
bool
TextSubtitleDecoder::pass (PassReason, bool)
{
if (_next >= _subtitles.size ()) {
return true;
}
subtitle->give_text (content_time_period (_subtitles[_next]), _subtitles[_next]);
++_next;
return false;
}
list<ContentTimePeriod>
TextSubtitleDecoder::image_subtitles_during (ContentTimePeriod, bool) const
{
return list<ContentTimePeriod> ();
}
list<ContentTimePeriod>
TextSubtitleDecoder::text_subtitles_during (ContentTimePeriod p, bool starting) const
{
/* XXX: inefficient */
list<ContentTimePeriod> d;
/* Only take `during' (not starting) subs if they overlap more than half the requested period;
here's the threshold for being significant.
*/
ContentTime const significant (p.duration().get() / 2);
for (vector<sub::Subtitle>::const_iterator i = _subtitles.begin(); i != _subtitles.end(); ++i) {
ContentTimePeriod t = content_time_period (*i);
if (starting && p.contains(t.from)) {
d.push_back (t);
} else if (!starting) {
optional<ContentTimePeriod> const o = p.overlap (t);
if (o && o->duration() > significant) {
d.push_back (t);
}
}
}
return d;
}
ContentTimePeriod
TextSubtitleDecoder::content_time_period (sub::Subtitle s) const
{
return ContentTimePeriod (
ContentTime::from_seconds (s.from.all_as_seconds()),
ContentTime::from_seconds (s.to.all_as_seconds())
);
}
void
TextSubtitleDecoder::reset ()
{
subtitle->reset ();
}
|
