More sensible default size / position for .srt subs.
[dcpomatic.git] / src / lib / subrip_decoder.cc
1 /*
2     Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
3
4     This program is free software; you can redistribute it and/or modify
5     it under the terms of the GNU General Public License as published by
6     the Free Software Foundation; either version 2 of the License, or
7     (at your option) any later version.
8
9     This program is distributed in the hope that it will be useful,
10     but WITHOUT ANY WARRANTY; without even the implied warranty of
11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12     GNU General Public License for more details.
13
14     You should have received a copy of the GNU General Public License
15     along with this program; if not, write to the Free Software
16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18 */
19
20 #include <dcp/subtitle_string.h>
21 #include "subrip_decoder.h"
22 #include "subrip_content.h"
23
24 using std::list;
25 using std::vector;
26 using boost::shared_ptr;
27
28 SubRipDecoder::SubRipDecoder (shared_ptr<const SubRipContent> content)
29         : SubtitleDecoder (content)
30         , SubRip (content)
31         , _next (0)
32 {
33
34 }
35
36 void
37 SubRipDecoder::seek (ContentTime time, bool accurate)
38 {
39         SubtitleDecoder::seek (time, accurate);
40         
41         _next = 0;
42         list<SubRipSubtitlePiece>::const_iterator i = _subtitles[_next].pieces.begin();
43         while (i != _subtitles[_next].pieces.end() && _subtitles[_next].period.from < time) {
44                 ++i;
45         }
46         
47 }
48
49 bool
50 SubRipDecoder::pass ()
51 {
52         if (_next >= _subtitles.size ()) {
53                 return true;
54         }
55
56         /* XXX: we are ignoring positioning specified in the file */
57         
58         list<dcp::SubtitleString> out;
59         for (list<SubRipSubtitlePiece>::const_iterator i = _subtitles[_next].pieces.begin(); i != _subtitles[_next].pieces.end(); ++i) {
60                 out.push_back (
61                         dcp::SubtitleString (
62                                 "Arial",
63                                 i->italic,
64                                 dcp::Color (255, 255, 255),
65                                 /* .srt files don't specify size, so this is an arbitrary value */
66                                 48,
67                                 dcp::Time (rint (_subtitles[_next].period.from.seconds() * 250)),
68                                 dcp::Time (rint (_subtitles[_next].period.to.seconds() * 250)),
69                                 0.2,
70                                 dcp::BOTTOM,
71                                 i->text,
72                                 dcp::NONE,
73                                 dcp::Color (255, 255, 255),
74                                 0,
75                                 0
76                                 )
77                         );
78         }
79
80         text_subtitle (out);
81         ++_next;
82         return false;
83 }
84
85 list<ContentTimePeriod>
86 SubRipDecoder::subtitles_during (ContentTimePeriod p, bool starting) const
87 {
88         /* XXX: inefficient */
89
90         list<ContentTimePeriod> d;
91
92         for (vector<SubRipSubtitle>::const_iterator i = _subtitles.begin(); i != _subtitles.end(); ++i) {
93                 if ((starting && p.contains (i->period.from)) || (!starting && p.overlaps (i->period))) {
94                         d.push_back (i->period);
95                 }
96         }
97
98         return d;
99 }