test/j2k_video_bit_rate_test.cc

   1 /*
   2     Copyright (C) 2016-2021 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21
  22 /** @file  test/j2k_video_bit_rate_test.cc
  23  *  @brief Test whether we output whatever J2K bandwidth is requested.
  24  *  @ingroup feature
  25  */
  26
  27
  28 #include "test.h"
  29 #include "lib/dcp_content_type.h"
  30 #include "lib/film.h"
  31 #include "lib/image_content.h"
  32 #include "lib/video_content.h"
  33 #include <dcp/raw_convert.h>
  34 #include <boost/test/unit_test.hpp>
  35
  36
  37 using std::make_shared;
  38 using std::string;
  39
  40
  41 static void
  42 check (int target_bits_per_second)
  43 {
  44         Cleanup cl;
  45
  46         int const duration = 10;
  47
  48         string const name = "bandwidth_test_" + dcp::raw_convert<string> (target_bits_per_second);
  49         auto content = make_shared<ImageContent>(TestPaths::private_data() / "prophet_frame.tiff");
  50         auto film = new_test_film(name, { content }, &cl);
  51         film->set_video_bit_rate(VideoEncoding::JPEG2000, target_bits_per_second);
  52         content->video->set_length (24 * duration);
  53         make_and_verify_dcp (
  54                 film,
  55                 {
  56                         dcp::VerificationNote::Code::MISSING_FFMC_IN_FEATURE,
  57                         dcp::VerificationNote::Code::MISSING_FFEC_IN_FEATURE,
  58                         dcp::VerificationNote::Code::NEARLY_INVALID_PICTURE_FRAME_SIZE_IN_BYTES,
  59                         dcp::VerificationNote::Code::INVALID_PICTURE_FRAME_SIZE_IN_BYTES,
  60                         dcp::VerificationNote::Code::INVALID_JPEG2000_TILE_PART_SIZE,
  61                 },
  62                 target_bits_per_second <= 250000000,
  63                 target_bits_per_second <= 250000000
  64                 );
  65
  66         auto test = find_file(film->dir(film->dcp_name()), "j2c_");
  67         double actual_bits_per_second = boost::filesystem::file_size(test) * 8.0 / duration;
  68
  69         /* Check that we're within 85% to 115% of target on average */
  70         BOOST_CHECK ((actual_bits_per_second / target_bits_per_second) > 0.85);
  71         BOOST_CHECK ((actual_bits_per_second / target_bits_per_second) < 1.15);
  72
  73         cl.run();
  74 }
  75
  76
  77 BOOST_AUTO_TEST_CASE (bandwidth_test)
  78 {
  79         check (50000000);
  80         check (100000000);
  81         check (150000000);
  82         check (200000000);
  83         check (250000000);
  84         check (300000000);
  85         check (350000000);
  86         check (400000000);
  87         check (450000000);
  88         check (500000000);
  89 }