1 files changed, 97 insertions, 0 deletions
diff --git a/test/video_level_test.cc b/test/video_level_test.cc
new file mode 100644
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+++ b/test/video_level_test.cc
@@ -0,0 +1,97 @@
+/*
+    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/>.
+
+*/
+
+
+/** @file  test/video_level_test.cc
+ *  @brief Test that video level ranges are handled correctly.
+ *  @ingroup specific
+ */
+
+
+#include "lib/ffmpeg_image_proxy.h"
+#include "lib/image.h"
+#include "test.h"
+#include <boost/test/unit_test.hpp>
+
+
+using boost::shared_ptr;
+
+
+static
+shared_ptr<Image>
+grey_image (dcp::Size size, uint8_t pixel)
+{
+	shared_ptr<Image> grey(new Image(AV_PIX_FMT_RGB24, size, true));
+	for (int y = 0; y < size.height; ++y) {
+		uint8_t* p = grey->data()[0] + y * grey->stride()[0];
+		for (int x = 0; x < size.width; ++x) {
+			*p++ = pixel;
+			*p++ = pixel;
+			*p++ = pixel;
+		}
+	}
+
+	return grey;
+}
+
+
+BOOST_AUTO_TEST_CASE (ffmpeg_image_full_range_not_changed)
+{
+	dcp::Size size(640, 480);
+	uint8_t const grey_pixel = 128;
+	boost::filesystem::path const file = "build/test/ffmpeg_image_full_range_not_changed.png";
+
+	write_image (grey_image(size, grey_pixel), file);
+
+	FFmpegImageProxy proxy (file, VIDEO_RANGE_FULL);
+	ImageProxy::Result result = proxy.image ();
+	BOOST_REQUIRE (!result.error);
+
+	for (int y = 0; y < size.height; ++y) {
+		uint8_t* p = result.image->data()[0] + y * result.image->stride()[0];
+		for (int x = 0; x < size.width; ++x) {
+			BOOST_REQUIRE (*p++ == grey_pixel);
+		}
+	}
+}
+
+
+BOOST_AUTO_TEST_CASE (ffmpeg_image_video_range_expanded)
+{
+	dcp::Size size(640, 480);
+	uint8_t const grey_pixel = 128;
+	uint8_t const expanded_grey_pixel = static_cast<uint8_t>((grey_pixel - 16) * 256.0 / 219);
+	boost::filesystem::path const file = "build/test/ffmpeg_image_video_range_expanded.png";
+
+	write_image (grey_image(size, grey_pixel), file);
+
+	FFmpegImageProxy proxy (file, VIDEO_RANGE_VIDEO);
+	ImageProxy::Result result = proxy.image ();
+	BOOST_REQUIRE (!result.error);
+
+	for (int y = 0; y < size.height; ++y) {
+		uint8_t* p = result.image->data()[0] + y * result.image->stride()[0];
+		for (int x = 0; x < size.width; ++x) {
+			BOOST_REQUIRE_EQUAL (*p++, expanded_grey_pixel);
+		}
+	}
+}
+
+