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Diffstat (limited to 'test/lut_test.cc')
| -rw-r--r-- | test/lut_test.cc | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/test/lut_test.cc b/test/lut_test.cc new file mode 100644 index 00000000..41d985f7 --- /dev/null +++ b/test/lut_test.cc @@ -0,0 +1,47 @@ +/* + Copyright (C) 2013 Carl Hetherington <cth@carlh.net> + + This program 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. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#include "opendcp_lut.h" +#include "opendcp_lut.cc" +#include "srgb_linearised_gamma_lut.h" +#include "rec709_linearised_gamma_lut.h" +#include "gamma_lut.h" + +/* Check that some of our LUTs match the ones from OpenDCP that + DVD-o-matic uses / once used. +*/ +BOOST_AUTO_TEST_CASE (lut_test) +{ + libdcp::SRGBLinearisedGammaLUT lut_in_srgb (12, 2.4); + for (int i = 0; i < 4096; ++i) { + /* Hmm; 1% isn't exactly great... */ + BOOST_CHECK_CLOSE (opendcp::lut_in[0][i], lut_in_srgb.lut()[i], 1); + } + + libdcp::Rec709LinearisedGammaLUT lut_in_rec709 (12, 1 / 0.45); + for (int i = 0; i < 4096; ++i) { + /* Hmm; 1% isn't exactly great... */ + BOOST_CHECK_CLOSE (opendcp::lut_in[1][i], lut_in_rec709.lut()[i], 1); + } + + libdcp::GammaLUT lut_out (16, 1 / 2.6); + for (int i = 0; i < 65536; ++i) { + BOOST_CHECK_CLOSE (opendcp::lut_out[0][i], lut_out.lut()[i] * 4096, 1); + } +} |