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"
25 using boost::shared_ptr;
26 using boost::optional;
28 SubtitleDecoder::SubtitleDecoder ()
33 /** Called by subclasses when an image subtitle is ready.
34 * Image may be 0 to say that there is no current subtitle.
37 SubtitleDecoder::image_subtitle (ContentTime from, ContentTime to, shared_ptr<Image> image, dcpomatic::Rect<double> rect)
39 _decoded_image_subtitles.push_back (shared_ptr<ContentImageSubtitle> (new ContentImageSubtitle (from, to, image, rect)));
43 SubtitleDecoder::text_subtitle (list<dcp::SubtitleString> s)
45 _decoded_text_subtitles.push_back (shared_ptr<ContentTextSubtitle> (new ContentTextSubtitle (s)));
50 SubtitleDecoder::get (list<shared_ptr<T> > const & subs, ContentTime from, ContentTime to)
52 if (subs.empty() || from < subs.front()->from() || to > (subs.back()->to() + ContentTime::from_seconds (10))) {
53 /* Either we have no decoded data, or what we do have is a long way from what we want: seek */
57 /* Now enough pass() calls will either:
58 * (a) give us what we want, or
59 * (b) hit the end of the decoder.
61 * XXX: with subs being sparse, this may need more care...
63 while (!pass() && (subs.front()->from() > from || to < subs.back()->to())) {}
65 /* Now look for what we wanted in the data we have collected */
66 /* XXX: inefficient */
68 list<shared_ptr<T> > out;
69 for (typename list<shared_ptr<T> >::const_iterator i = subs.begin(); i != subs.end(); ++i) {
70 if ((*i)->from() <= to && (*i)->to() >= from) {
78 list<shared_ptr<ContentTextSubtitle> >
79 SubtitleDecoder::get_text_subtitles (ContentTime from, ContentTime to)
81 return get<ContentTextSubtitle> (_decoded_text_subtitles, from, to);
84 list<shared_ptr<ContentImageSubtitle> >
85 SubtitleDecoder::get_image_subtitles (ContentTime from, ContentTime to)
87 return get<ContentImageSubtitle> (_decoded_image_subtitles, from, to);
91 SubtitleDecoder::seek (ContentTime, bool)
93 _decoded_text_subtitles.clear ();
94 _decoded_image_subtitles.clear ();