--- /dev/null
+/*
+ Copyright (C) 2018 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 "dcpomatic_log.h"
+#include "null_log.h"
+
+/** The current log; set up by the front-ends when they have a Film to log into */
+boost::shared_ptr<Log> dcpomatic_log (new NullLog());
--- /dev/null
+/*
+ Copyright (C) 2018 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 <boost/shared_ptr.hpp>
+
+class Log;
+
+/** The current log; set up by the front-ends when they have a Film to log into */
+extern boost::shared_ptr<Log> dcpomatic_log;
+
+#define LOG_GENERAL(...) dcpomatic_log->log(String::compose(__VA_ARGS__), LogEntry::TYPE_GENERAL);
+#define LOG_GENERAL_NC(...) dcpomatic_log->log(__VA_ARGS__, LogEntry::TYPE_GENERAL);
+#define LOG_ERROR(...) dcpomatic_log->log(String::compose(__VA_ARGS__), LogEntry::TYPE_ERROR);
+#define LOG_ERROR_NC(...) dcpomatic_log->log(__VA_ARGS__, LogEntry::TYPE_ERROR);
+#define LOG_WARNING(...) dcpomatic_log->log(String::compose(__VA_ARGS__), LogEntry::TYPE_WARNING);
+#define LOG_WARNING_NC(...) dcpomatic_log->log(__VA_ARGS__, LogEntry::TYPE_WARNING);
+#define LOG_TIMING(...) dcpomatic_log->log(String::compose(__VA_ARGS__), LogEntry::TYPE_TIMING);
+#define LOG_DEBUG_ENCODE(...) dcpomatic_log->log(String::compose(__VA_ARGS__), LogEntry::TYPE_DEBUG_ENCODE);