Split Empty into two separate classes, EmptyAudio and EmptyVideo.

[dcpomatic.git] / src / lib / empty_audio.cc

diff --git a/src/lib/empty_audio.cc b/src/lib/empty_audio.cc
new file mode 100644 (file)
index 0000000..a2d914b
--- /dev/null
+++ b/src/lib/empty_audio.cc
@@ -0,0 +1,100 @@
+/*
+    Copyright (C) 2017-2021 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "content.h"
+#include "content_part.h"
+#include "dcp_content.h"
+#include "dcpomatic_time_coalesce.h"
+#include "empty_audio.h"
+#include "film.h"
+#include "piece.h"
+#include "playlist.h"
+#include <iostream>
+
+
+using std::cout;
+using std::dynamic_pointer_cast;
+using std::function;
+using std::list;
+using std::shared_ptr;
+using namespace dcpomatic;
+
+
+EmptyAudio::EmptyAudio (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist, DCPTime length)
+{
+       list<DCPTimePeriod> full;
+       for (auto i: playlist->content()) {
+               if (i->audio && i->paths_valid()) {
+                       full.push_back (DCPTimePeriod(i->position(), i->end(film)));
+               }
+       }
+
+       _periods = subtract (DCPTimePeriod(DCPTime(), length), coalesce(full));
+
+       if (!_periods.empty()) {
+               _position = _periods.front().from;
+       }
+}
+
+
+void
+EmptyAudio::set_position (DCPTime position)
+{
+       _position = position;
+
+       for (auto i: _periods) {
+               if (i.contains(_position)) {
+                       return;
+               }
+       }
+
+       for (auto i: _periods) {
+               if (i.from > _position) {
+                       _position = i.from;
+                       return;
+               }
+       }
+}
+
+
+DCPTimePeriod
+EmptyAudio::period_at_position () const
+{
+       for (auto i: _periods) {
+               if (i.contains(_position)) {
+                       return DCPTimePeriod (_position, i.to);
+               }
+       }
+
+       DCPOMATIC_ASSERT (false);
+}
+
+
+bool
+EmptyAudio::done () const
+{
+       DCPTime latest;
+       for (auto i: _periods) {
+               latest = max (latest, i.to);
+       }
+
+       return _position >= latest;
+}