test/silence_padding_test.cc

   1 /*
   2     Copyright (C) 2013-2021 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/silence_padding_test.cc
  23  *  @brief Test the padding (with silence) of a mono source to a 6-channel DCP.
  24  *  @ingroup feature
  25  */
  26
  27
  28 #include "lib/constants.h"
  29 #include "lib/ffmpeg_content.h"
  30 #include "lib/film.h"
  31 #include "lib/dcp_content_type.h"
  32 #include "lib/ratio.h"
  33 #include "test.h"
  34 #include <dcp/cpl.h>
  35 #include <dcp/dcp.h>
  36 #include <dcp/sound_asset.h>
  37 #include <dcp/sound_frame.h>
  38 #include <dcp/reel.h>
  39 #include <dcp/reel_sound_asset.h>
  40 #include <dcp/sound_asset_reader.h>
  41 #include <boost/test/unit_test.hpp>
  42
  43
  44 using std::make_shared;
  45 using std::string;
  46 using std::shared_ptr;
  47 using boost::lexical_cast;
  48
  49
  50 static void
  51 test_silence_padding (int channels)
  52 {
  53         string const film_name = "silence_padding_test_" + lexical_cast<string> (channels);
  54         auto film = new_test_film2 (
  55                 film_name,
  56                 {
  57                         make_shared<FFmpegContent>("test/data/flat_red.png"),
  58                         make_shared<FFmpegContent>("test/data/staircase.wav")
  59                 });
  60
  61         film->set_audio_channels (channels);
  62         make_and_verify_dcp (film);
  63
  64         boost::filesystem::path path = "build/test";
  65         path /= film_name;
  66         path /= film->dcp_name ();
  67         dcp::DCP check (path.string ());
  68         check.read ();
  69
  70         auto sound_asset = check.cpls()[0]->reels()[0]->main_sound();
  71         BOOST_CHECK (sound_asset);
  72         BOOST_CHECK_EQUAL (sound_asset->asset()->channels (), channels);
  73
  74         /* Sample index in the DCP */
  75         int n = 0;
  76         /* DCP sound asset frame */
  77         int frame = 0;
  78
  79         while (n < sound_asset->asset()->intrinsic_duration()) {
  80                 auto sound_frame = sound_asset->asset()->start_read()->get_frame(frame++);
  81                 uint8_t const * d = sound_frame->data ();
  82
  83                 for (int i = 0; i < sound_frame->size(); i += (3 * sound_asset->asset()->channels())) {
  84
  85                         if (sound_asset->asset()->channels() > 0) {
  86                                 /* L should be silent */
  87                                 int const sample = d[i + 1] | (d[i + 2] << 8);
  88                                 BOOST_CHECK_EQUAL (sample, 0);
  89                         }
  90
  91                         if (sound_asset->asset()->channels() > 1) {
  92                                 /* R should be silent */
  93                                 int const sample = d[i + 4] | (d[i + 5] << 8);
  94                                 BOOST_CHECK_EQUAL (sample, 0);
  95                         }
  96
  97                         if (sound_asset->asset()->channels() > 2) {
  98                                 /* Mono input so it will appear on centre */
  99                                 int const sample = d[i + 7] | (d[i + 8] << 8);
 100                                 BOOST_CHECK_EQUAL (sample, n);
 101                         }
 102
 103                         if (sound_asset->asset()->channels() > 3) {
 104                                 /* Lfe should be silent */
 105                                 int const sample = d[i + 10] | (d[i + 11] << 8);
 106                                 BOOST_CHECK_EQUAL (sample, 0);
 107                         }
 108
 109                         if (sound_asset->asset()->channels() > 4) {
 110                                 /* Ls should be silent */
 111                                 int const sample = d[i + 13] | (d[i + 14] << 8);
 112                                 BOOST_CHECK_EQUAL (sample, 0);
 113                         }
 114
 115
 116                         if (sound_asset->asset()->channels() > 5) {
 117                                 /* Rs should be silent */
 118                                 int const sample = d[i + 16] | (d[i + 17] << 8);
 119                                 BOOST_CHECK_EQUAL (sample, 0);
 120                         }
 121
 122                         ++n;
 123                 }
 124         }
 125
 126 }
 127
 128
 129 BOOST_AUTO_TEST_CASE (silence_padding_test)
 130 {
 131         for (int i = 1; i < MAX_DCP_AUDIO_CHANNELS; ++i) {
 132                 test_silence_padding (i);
 133         }
 134 }
 135
 136
 137 /** Test a situation that used to crash because of a sub-sample rounding confusion
 138  *  caused by a trim.
 139  */
 140
 141 BOOST_AUTO_TEST_CASE (silence_padding_test2)
 142 {
 143         Cleanup cl;
 144
 145         auto content = make_shared<FFmpegContent>(TestPaths::private_data() / "cars.mov");
 146         auto film = new_test_film2 ("silence_padding_test2", { content }, &cl);
 147
 148         film->set_video_frame_rate (24);
 149         content->set_trim_start(film, dcpomatic::ContentTime(4003));
 150
 151         make_and_verify_dcp (film);
 152
 153         cl.run ();
 154 }