Add subtitle analysis so that the outline of all subtitles

in a piece of content can be overlaid onto the preview (#1233).

1 files changed, 69 insertions, 0 deletions

diff --git a/src/lib/subtitle_analysis.h b/src/lib/subtitle_analysis.h
new file mode 100644
index 000000000..47eb52411
--- /dev/null
+++ b/src/lib/subtitle_analysis.h
@@ -0,0 +1,69 @@
+/*
+    Copyright (C) 2020 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 "rect.h"
+#include <boost/noncopyable.hpp>
+#include <boost/filesystem.hpp>
+
+
+/** @class SubtitleAnalysis
+ *  @brief Class to store the results of a SubtitleAnalysisJob.
+ */
+
+class SubtitleAnalysis : public boost::noncopyable
+{
+public:
+	explicit SubtitleAnalysis (boost::filesystem::path path);
+
+	SubtitleAnalysis (
+			boost::optional<dcpomatic::Rect<double> > bounding_box,
+			double analysis_x_offset_,
+			double analysis_y_offset_
+			)
+		: _bounding_box (bounding_box)
+		, _analysis_x_offset (analysis_x_offset_)
+		, _analysis_y_offset (analysis_y_offset_)
+	{}
+
+	void write (boost::filesystem::path path) const;
+
+	boost::optional<dcpomatic::Rect<double> > bounding_box () const {
+		return _bounding_box;
+	}
+
+	double analysis_x_offset () const {
+		return _analysis_x_offset;
+	}
+
+	double analysis_y_offset () const {
+		return _analysis_x_offset;
+	}
+
+private:
+	/** Smallest box which surrounds all subtitles in our content,
+	 *  expressed as a proportion of screen size (i.e. 0 is left hand side/top,
+	 *  1 is right hand side/bottom), or empty if no subtitles were found.
+	 */
+	boost::optional<dcpomatic::Rect<double> > _bounding_box;
+	double _analysis_x_offset;
+	double _analysis_y_offset;
+
+	static int const _current_state_version;
+};