test/silence_padding_test.cc

   1 /*
   2     Copyright (C) 2013-2014 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 /** @file  test/silence_padding_test.cc
  22  *  @brief Test the padding (with silence) of a mono source to a 6-channel DCP.
  23  *  @ingroup feature
  24  */
  25
  26 #include "lib/ffmpeg_content.h"
  27 #include "lib/film.h"
  28 #include "lib/dcp_content_type.h"
  29 #include "lib/ratio.h"
  30 #include "test.h"
  31 #include <dcp/cpl.h>
  32 #include <dcp/dcp.h>
  33 #include <dcp/sound_asset.h>
  34 #include <dcp/sound_frame.h>
  35 #include <dcp/reel.h>
  36 #include <dcp/reel_sound_asset.h>
  37 #include <dcp/sound_asset_reader.h>
  38 #include <boost/test/unit_test.hpp>
  39
  40 using std::make_shared;
  41 using std::string;
  42 using std::shared_ptr;
  43 using boost::lexical_cast;
  44
  45 static void
  46 test_silence_padding (int channels)
  47 {
  48         string const film_name = "silence_padding_test_" + lexical_cast<string> (channels);
  49         auto film = new_test_film2 (
  50                 film_name,
  51                 {
  52                         make_shared<FFmpegContent>("test/data/flat_red.png"),
  53                         make_shared<FFmpegContent>("test/data/staircase.wav")
  54                 });
  55
  56         film->set_audio_channels (channels);
  57         make_and_verify_dcp (film);
  58
  59         boost::filesystem::path path = "build/test";
  60         path /= film_name;
  61         path /= film->dcp_name ();
  62         dcp::DCP check (path.string ());
  63         check.read ();
  64
  65         auto sound_asset = check.cpls()[0]->reels()[0]->main_sound();
  66         BOOST_CHECK (sound_asset);
  67         BOOST_CHECK_EQUAL (sound_asset->asset()->channels (), channels);
  68
  69         /* Sample index in the DCP */
  70         int n = 0;
  71         /* DCP sound asset frame */
  72         int frame = 0;
  73
  74         while (n < sound_asset->asset()->intrinsic_duration()) {
  75                 auto sound_frame = sound_asset->asset()->start_read()->get_frame(frame++);
  76                 uint8_t const * d = sound_frame->data ();
  77
  78                 for (int i = 0; i < sound_frame->size(); i += (3 * sound_asset->asset()->channels())) {
  79
  80                         if (sound_asset->asset()->channels() > 0) {
  81                                 /* L should be silent */
  82                                 int const sample = d[i + 1] | (d[i + 2] << 8);
  83                                 BOOST_CHECK_EQUAL (sample, 0);
  84                         }
  85
  86                         if (sound_asset->asset()->channels() > 1) {
  87                                 /* R should be silent */
  88                                 int const sample = d[i + 4] | (d[i + 5] << 8);
  89                                 BOOST_CHECK_EQUAL (sample, 0);
  90                         }
  91
  92                         if (sound_asset->asset()->channels() > 2) {
  93                                 /* Mono input so it will appear on centre */
  94                                 int const sample = d[i + 7] | (d[i + 8] << 8);
  95                                 BOOST_CHECK_EQUAL (sample, n);
  96                         }
  97
  98                         if (sound_asset->asset()->channels() > 3) {
  99                                 /* Lfe should be silent */
 100                                 int const sample = d[i + 10] | (d[i + 11] << 8);
 101                                 BOOST_CHECK_EQUAL (sample, 0);
 102                         }
 103
 104                         if (sound_asset->asset()->channels() > 4) {
 105                                 /* Ls should be silent */
 106                                 int const sample = d[i + 13] | (d[i + 14] << 8);
 107                                 BOOST_CHECK_EQUAL (sample, 0);
 108                         }
 109
 110
 111                         if (sound_asset->asset()->channels() > 5) {
 112                                 /* Rs should be silent */
 113                                 int const sample = d[i + 16] | (d[i + 17] << 8);
 114                                 BOOST_CHECK_EQUAL (sample, 0);
 115                         }
 116
 117                         ++n;
 118                 }
 119         }
 120
 121 }
 122
 123 BOOST_AUTO_TEST_CASE (silence_padding_test)
 124 {
 125         for (int i = 1; i < MAX_DCP_AUDIO_CHANNELS; ++i) {
 126                 test_silence_padding (i);
 127         }
 128 }
 129
 130 /** Test a situation that used to crash because of a sub-sample rounding confusion
 131  *  caused by a trim.
 132  */
 133
 134 BOOST_AUTO_TEST_CASE (silence_padding_test2)
 135 {
 136         Cleanup cl;
 137
 138         auto content = make_shared<FFmpegContent>(TestPaths::private_data() / "cars.mov");
 139         auto film = new_test_film2 ("silence_padding_test2", { content }, &cl);
 140
 141         film->set_video_frame_rate (24);
 142         content->set_trim_start (dcpomatic::ContentTime(4003));
 143
 144         make_and_verify_dcp (film);
 145
 146         cl.run ();
 147 }