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 boost::lexical_cast;
  47
  48
  49 static void
  50 test_silence_padding(int channels, dcp::Standard standard)
  51 {
  52         string const film_name = "silence_padding_test_" + lexical_cast<string> (channels);
  53         auto film = new_test_film2 (
  54                 film_name,
  55                 {
  56                         make_shared<FFmpegContent>("test/data/flat_red.png"),
  57                         make_shared<FFmpegContent>("test/data/staircase.wav")
  58                 });
  59
  60         if (standard == dcp::Standard::INTEROP) {
  61                 film->set_interop(true);
  62         }
  63         film->set_audio_channels (channels);
  64
  65         std::vector<dcp::VerificationNote::Code> codes;
  66         if (standard == dcp::Standard::INTEROP) {
  67                 codes.push_back(dcp::VerificationNote::Code::INVALID_STANDARD);
  68         }
  69         auto const dcp_inspect = channels == 2 || channels == 6 || channels >= 8;
  70         auto const clairmeta = (channels % 2) == 0;
  71         make_and_verify_dcp(film, codes, dcp_inspect, clairmeta);
  72
  73         boost::filesystem::path path = "build/test";
  74         path /= film_name;
  75         path /= film->dcp_name ();
  76         dcp::DCP check (path.string ());
  77         check.read ();
  78
  79         auto sound_asset = check.cpls()[0]->reels()[0]->main_sound();
  80         BOOST_CHECK (sound_asset);
  81         BOOST_CHECK_EQUAL (sound_asset->asset()->channels (), channels);
  82
  83         /* Sample index in the DCP */
  84         int n = 0;
  85         /* DCP sound asset frame */
  86         int frame = 0;
  87
  88         auto const asset_channels = sound_asset->asset()->channels();
  89         if (standard == dcp::Standard::SMPTE) {
  90                 DCP_ASSERT(asset_channels == MAX_DCP_AUDIO_CHANNELS)
  91         } else {
  92                 DCP_ASSERT(asset_channels == channels);
  93         }
  94
  95         while (n < sound_asset->asset()->intrinsic_duration()) {
  96                 auto sound_frame = sound_asset->asset()->start_read()->get_frame(frame++);
  97                 uint8_t const * d = sound_frame->data ();
  98
  99                 for (int offset = 0; offset < sound_frame->size(); offset += (3 * asset_channels)) {
 100
 101                         for (auto channel = 0; channel < asset_channels; ++channel) {
 102                                 auto const sample = d[offset + channel * 3 + 1] | (d[offset + channel * 3 + 2] << 8);
 103                                 if (channel == 2) {
 104                                         /* Input should be on centre */
 105                                         BOOST_CHECK_EQUAL(sample, n);
 106                                 } else {
 107                                         /* Everything else should be silent */
 108                                         BOOST_CHECK_EQUAL(sample, 0);
 109                                 }
 110                         }
 111
 112                         ++n;
 113                 }
 114         }
 115 }
 116
 117
 118 BOOST_AUTO_TEST_CASE (silence_padding_test)
 119 {
 120         for (int i = 1; i < MAX_DCP_AUDIO_CHANNELS; ++i) {
 121                 test_silence_padding(i, dcp::Standard::INTEROP);
 122         }
 123
 124         test_silence_padding(MAX_DCP_AUDIO_CHANNELS, dcp::Standard::SMPTE);
 125 }
 126
 127
 128 /** Test a situation that used to crash because of a sub-sample rounding confusion
 129  *  caused by a trim.
 130  */
 131
 132 BOOST_AUTO_TEST_CASE (silence_padding_test2)
 133 {
 134         Cleanup cl;
 135
 136         auto content = make_shared<FFmpegContent>(TestPaths::private_data() / "cars.mov");
 137         auto film = new_test_film2 ("silence_padding_test2", { content }, &cl);
 138
 139         film->set_video_frame_rate (24);
 140         content->set_trim_start(film, dcpomatic::ContentTime(4003));
 141
 142         make_and_verify_dcp (film);
 143
 144         cl.run ();
 145 }