src/lib/empty_video.cc

   1 /*
   2     Copyright (C) 2017-2021 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   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.
  10
  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.
  15
  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/>.
  18
  19 */
  20
  21
  22 #include "content.h"
  23 #include "content_part.h"
  24 #include "dcp_content.h"
  25 #include "dcpomatic_time_coalesce.h"
  26 #include "empty_video.h"
  27 #include "film.h"
  28 #include "piece.h"
  29 #include "playlist.h"
  30 #include "video_content.h"
  31 #include <iostream>
  32
  33
  34 using std::cout;
  35 using std::dynamic_pointer_cast;
  36 using std::function;
  37 using std::list;
  38 using std::make_pair;
  39 using std::pair;
  40 using std::shared_ptr;
  41 using namespace dcpomatic;
  42
  43
  44 EmptyVideo::EmptyVideo (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist, DCPTime length)
  45 {
  46         list<DCPTimePeriod> full_left;
  47         list<DCPTimePeriod> full_right;
  48         list<DCPTimePeriod> full_both;
  49         for (auto i: playlist->content()) {
  50                 if (i->video && i->video->use() && i->can_be_played() && i->paths_valid()) {
  51                         auto period = DCPTimePeriod(i->position(), i->end(film));
  52                         if (i->video->frame_type() == VideoFrameType::THREE_D_LEFT) {
  53                                 full_left.push_back (period);
  54                         } else if (i->video->frame_type() == VideoFrameType::THREE_D_RIGHT) {
  55                                 full_right.push_back (period);
  56                         } else {
  57                                 full_both.push_back (period);
  58                         }
  59                 }
  60         }
  61
  62         auto const whole = DCPTimePeriod(DCPTime(), length);
  63
  64         auto empty_both = subtract(subtract(subtract({whole}, full_left), full_right), full_both);
  65         auto empty_left = subtract(subtract(subtract({whole}, full_left), full_both), empty_both);
  66         auto empty_right = subtract(subtract(subtract({whole}, full_right), full_both), empty_both);
  67
  68         for (auto left: empty_left) {
  69                 _periods.push_back (make_pair(left, Eyes::LEFT));
  70         }
  71
  72         for (auto right: empty_right) {
  73                 _periods.push_back (make_pair(right, Eyes::RIGHT));
  74         }
  75
  76         for (auto both: empty_both) {
  77                 _periods.push_back (make_pair(both, Eyes::BOTH));
  78         }
  79
  80         _periods.sort([](std::pair<DCPTimePeriod, Eyes> const& a, std::pair<DCPTimePeriod, Eyes> const& b) {
  81                 return a.first < b.first;
  82         });
  83
  84         if (!_periods.empty()) {
  85                 _position = _periods.front().first.from;
  86         }
  87 }
  88
  89
  90 void
  91 EmptyVideo::set_position (DCPTime position)
  92 {
  93         _position = position;
  94
  95         for (auto i: _periods) {
  96                 if (i.first.contains(_position)) {
  97                         return;
  98                 }
  99         }
 100
 101         for (auto i: _periods) {
 102                 if (i.first.from > _position) {
 103                         _position = i.first.from;
 104                         return;
 105                 }
 106         }
 107 }
 108
 109
 110 pair<DCPTimePeriod, Eyes>
 111 EmptyVideo::period_at_position () const
 112 {
 113         for (auto i: _periods) {
 114                 if (i.first.contains(_position)) {
 115                         return make_pair(DCPTimePeriod(_position, i.first.to), i.second);
 116                 }
 117         }
 118
 119         DCPOMATIC_ASSERT (false);
 120 }
 121
 122
 123 bool
 124 EmptyVideo::done () const
 125 {
 126         DCPTime latest;
 127         for (auto i: _periods) {
 128                 latest = max (latest, i.first.to);
 129         }
 130
 131         return _position >= latest;
 132 }