2 Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #include "video_decoder.h"
23 #include "audio_decoder.h"
24 #include "subtitle_decoder.h"
25 #include <boost/optional.hpp>
29 using boost::optional;
31 /** @return Earliest time of content that the next pass() will emit */
33 Decoder::position () const
35 optional<ContentTime> pos;
37 if (video && !video->ignore() && (!pos || video->position() < *pos)) {
38 pos = video->position();
41 if (audio && !audio->ignore() && (!pos || audio->position() < *pos)) {
42 pos = audio->position();
45 if (subtitle && !subtitle->ignore() && (!pos || subtitle->position() < *pos)) {
46 pos = subtitle->position();
49 return pos.get_value_or(ContentTime());
53 Decoder::seek (ContentTime, bool)