2 Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
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.
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.
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.
20 #include <boost/shared_ptr.hpp>
21 #include "subtitle_decoder.h"
22 #include "subtitle_content.h"
26 using boost::shared_ptr;
27 using boost::optional;
29 SubtitleDecoder::SubtitleDecoder (shared_ptr<const SubtitleContent> c)
30 : _subtitle_content (c)
35 /** Called by subclasses when an image subtitle is ready.
36 * Image may be 0 to say that there is no current subtitle.
39 SubtitleDecoder::image_subtitle (ContentTimePeriod period, shared_ptr<Image> image, dcpomatic::Rect<double> rect)
41 _decoded_image_subtitles.push_back (shared_ptr<ContentImageSubtitle> (new ContentImageSubtitle (period, image, rect)));
45 SubtitleDecoder::text_subtitle (list<dcp::SubtitleString> s)
47 _decoded_text_subtitles.push_back (shared_ptr<ContentTextSubtitle> (new ContentTextSubtitle (s)));
52 SubtitleDecoder::get (list<shared_ptr<T> > const & subs, ContentTimePeriod period)
54 if (!_subtitle_content->has_subtitle_during (period)) {
55 return list<shared_ptr<T> > ();
58 if (subs.empty() || period.from < subs.front()->period().from || period.to > (subs.back()->period().to + ContentTime::from_seconds (10))) {
59 /* Either we have no decoded data, or what we do have is a long way from what we want: seek */
60 seek (period.from, true);
63 /* Now enough pass() calls will either:
64 * (a) give us what we want, or
65 * (b) hit the end of the decoder.
67 while (!pass() && (subs.empty() || (subs.front()->period().from > period.from || period.to < subs.back()->period().to))) {}
69 /* Now look for what we wanted in the data we have collected */
70 /* XXX: inefficient */
72 list<shared_ptr<T> > out;
73 for (typename list<shared_ptr<T> >::const_iterator i = subs.begin(); i != subs.end(); ++i) {
74 if ((*i)->period().from <= period.to && (*i)->period().to >= period.from) {
82 list<shared_ptr<ContentTextSubtitle> >
83 SubtitleDecoder::get_text_subtitles (ContentTimePeriod period)
85 return get<ContentTextSubtitle> (_decoded_text_subtitles, period);
88 list<shared_ptr<ContentImageSubtitle> >
89 SubtitleDecoder::get_image_subtitles (ContentTimePeriod period)
91 return get<ContentImageSubtitle> (_decoded_image_subtitles, period);
95 SubtitleDecoder::seek (ContentTime, bool)
97 _decoded_text_subtitles.clear ();
98 _decoded_image_subtitles.clear ();