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/*
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);
}
}
}
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