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  */
  24
  25 #include "lib/ffmpeg_content.h"
  26 #include "lib/film.h"
  27 #include "lib/dcp_content_type.h"
  28 #include "lib/ratio.h"
  29 #include "test.h"
  30 #include <dcp/cpl.h>
  31 #include <dcp/dcp.h>
  32 #include <dcp/sound_asset.h>
  33 #include <dcp/sound_frame.h>
  34 #include <dcp/reel.h>
  35 #include <dcp/reel_sound_asset.h>
  36 #include <dcp/sound_asset_reader.h>
  37 #include <boost/test/unit_test.hpp>
  38
  39 using std::string;
  40 using boost::lexical_cast;
  41 using boost::shared_ptr;
  42
  43 static void
  44 test_silence_padding (int channels)
  45 {
  46         string const film_name = "silence_padding_test_" + lexical_cast<string> (channels);
  47         shared_ptr<Film> film = new_test_film (film_name);
  48         film->set_dcp_content_type (DCPContentType::from_isdcf_name ("FTR"));
  49         film->set_container (Ratio::from_id ("185"));
  50         film->set_name (film_name);
  51
  52         shared_ptr<FFmpegContent> content (new FFmpegContent (film, "test/data/staircase.wav"));
  53         film->examine_and_add_content (content);
  54         wait_for_jobs ();
  55
  56         film->set_audio_channels (channels);
  57         film->make_dcp ();
  58         wait_for_jobs ();
  59
  60         boost::filesystem::path path = "build/test";
  61         path /= film_name;
  62         path /= film->dcp_name ();
  63         dcp::DCP check (path.string ());
  64         check.read ();
  65
  66         shared_ptr<const dcp::ReelSoundAsset> sound_asset = check.cpls().front()->reels().front()->main_sound ();
  67         BOOST_CHECK (sound_asset);
  68         BOOST_CHECK_EQUAL (sound_asset->asset()->channels (), channels);
  69
  70         /* Sample index in the DCP */
  71         int n = 0;
  72         /* DCP sound asset frame */
  73         int frame = 0;
  74
  75         while (n < sound_asset->asset()->intrinsic_duration()) {
  76                 shared_ptr<const dcp::SoundFrame> sound_frame = sound_asset->asset()->start_read()->get_frame (frame++);
  77                 uint8_t const * d = sound_frame->data ();
  78
  79                 for (int i = 0; i < sound_frame->size(); i += (3 * sound_asset->asset()->channels())) {
  80
  81                         if (sound_asset->asset()->channels() > 0) {
  82                                 /* L should be silent */
  83                                 int const sample = d[i + 0] | (d[i + 1] << 8);
  84                                 BOOST_CHECK_EQUAL (sample, 0);
  85                         }
  86
  87                         if (sound_asset->asset()->channels() > 1) {
  88                                 /* R should be silent */
  89                                 int const sample = d[i + 2] | (d[i + 3] << 8);
  90                                 BOOST_CHECK_EQUAL (sample, 0);
  91                         }
  92
  93                         if (sound_asset->asset()->channels() > 2) {
  94                                 /* Mono input so it will appear on centre */
  95                                 int const sample = d[i + 7] | (d[i + 8] << 8);
  96                                 BOOST_CHECK_EQUAL (sample, n);
  97                         }
  98
  99                         if (sound_asset->asset()->channels() > 3) {
 100                                 /* Lfe should be silent */
 101                                 int const sample = d[i + 9] | (d[i + 10] << 8);
 102                                 BOOST_CHECK_EQUAL (sample, 0);
 103                         }
 104
 105                         if (sound_asset->asset()->channels() > 4) {
 106                                 /* Ls should be silent */
 107                                 int const sample = d[i + 11] | (d[i + 12] << 8);
 108                                 BOOST_CHECK_EQUAL (sample, 0);
 109                         }
 110
 111
 112                         if (sound_asset->asset()->channels() > 5) {
 113                                 /* Rs should be silent */
 114                                 int const sample = d[i + 13] | (d[i + 14] << 8);
 115                                 BOOST_CHECK_EQUAL (sample, 0);
 116                         }
 117
 118                         ++n;
 119                 }
 120         }
 121
 122 }
 123
 124 BOOST_AUTO_TEST_CASE (silence_padding_test)
 125 {
 126         for (int i = 1; i < MAX_DCP_AUDIO_CHANNELS; ++i) {
 127                 test_silence_padding (i);
 128         }
 129 }