+/*
+ 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);
+ }
+ }
+}
+
+