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 (ContentImageSubtitle (period, image, rect));
45 SubtitleDecoder::text_subtitle (list<dcp::SubtitleString> s)
47 _decoded_text_subtitles.push_back (ContentTextSubtitle (s));
52 SubtitleDecoder::get (list<T> const & subs, ContentTimePeriod period)
54 /* Get the full periods of the subtitles that are showing during the specified period */
55 list<ContentTimePeriod> sp = subtitles_during (period);
57 /* Nothing in this period */
61 /* Seek if what we want is before what we have, or more than a reasonable amount after */
62 if (subs.empty() || sp.back().to < subs.front().period().from || sp.front().from > (subs.back().period().to + ContentTime::from_seconds (5))) {
63 seek (sp.front().from, true);
66 /* Now enough pass() calls will either:
67 * (a) give us what we want, or
68 * (b) hit the end of the decoder.
70 while (!pass() && (subs.empty() || (subs.back().period().to < sp.back().to))) {}
72 /* Now look for what we wanted in the data we have collected */
73 /* XXX: inefficient */
76 for (typename list<T>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
77 if (i->period().overlaps (period)) {
85 list<ContentTextSubtitle>
86 SubtitleDecoder::get_text_subtitles (ContentTimePeriod period)
88 return get<ContentTextSubtitle> (_decoded_text_subtitles, period);
91 list<ContentImageSubtitle>
92 SubtitleDecoder::get_image_subtitles (ContentTimePeriod period)
94 return get<ContentImageSubtitle> (_decoded_image_subtitles, period);
98 SubtitleDecoder::seek (ContentTime, bool)
100 _decoded_text_subtitles.clear ();
101 _decoded_image_subtitles.clear ();