2 Copyright (C) 2014-2016 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 "dcp_subtitle_decoder.h"
21 #include "dcp_subtitle_content.h"
22 #include <dcp/interop_subtitle_asset.h>
27 using boost::shared_ptr;
30 DCPSubtitleDecoder::DCPSubtitleDecoder (shared_ptr<const DCPSubtitleContent> content)
36 bind (&DCPSubtitleDecoder::image_subtitles_during, this, _1, _2),
37 bind (&DCPSubtitleDecoder::text_subtitles_during, this, _1, _2)
41 shared_ptr<dcp::SubtitleAsset> c (load (content->path (0)));
42 _subtitles = c->subtitles ();
43 _next = _subtitles.begin ();
47 DCPSubtitleDecoder::seek (ContentTime time, bool accurate)
49 subtitle->seek (time, accurate);
51 _next = _subtitles.begin ();
52 list<dcp::SubtitleString>::const_iterator i = _subtitles.begin ();
53 while (i != _subtitles.end() && ContentTime::from_seconds (_next->in().as_seconds()) < time) {
59 DCPSubtitleDecoder::pass (PassReason, bool)
61 if (_next == _subtitles.end ()) {
65 /* Gather all subtitles with the same time period that are next
66 on the list. We must emit all subtitles for the same time
67 period with the same text_subtitle() call otherwise the
68 SubtitleDecoder will assume there is nothing else at the
69 time of emit the first.
72 list<dcp::SubtitleString> s;
73 ContentTimePeriod const p = content_time_period (*_next);
75 while (_next != _subtitles.end () && content_time_period (*_next) == p) {
80 subtitle->give_text (p, s);
85 list<ContentTimePeriod>
86 DCPSubtitleDecoder::image_subtitles_during (ContentTimePeriod, bool) const
88 return list<ContentTimePeriod> ();
91 list<ContentTimePeriod>
92 DCPSubtitleDecoder::text_subtitles_during (ContentTimePeriod p, bool starting) const
94 /* XXX: inefficient */
96 list<ContentTimePeriod> d;
98 for (list<dcp::SubtitleString>::const_iterator i = _subtitles.begin(); i != _subtitles.end(); ++i) {
99 ContentTimePeriod period = content_time_period (*i);
100 if ((starting && p.contains (period.from)) || (!starting && p.overlaps (period))) {
101 d.push_back (period);
109 DCPSubtitleDecoder::content_time_period (dcp::SubtitleString s) const
111 return ContentTimePeriod (
112 ContentTime::from_seconds (s.in().as_seconds ()),
113 ContentTime::from_seconds (s.out().as_seconds ())