2 Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp 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.
11 libdcp 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.
16 You should have received a copy of the GNU General Public License
17 along with libdcp. If not, see <http://www.gnu.org/licenses/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
35 #include "sound_asset.h"
36 #include "sound_asset_reader.h"
37 #include "sound_asset_writer.h"
39 #include <boost/filesystem.hpp>
41 #include <boost/test/unit_test.hpp>
46 using boost::shared_array;
47 using std::shared_ptr;
50 static const int sample_A = 0.038 * 8388608;
51 static const int sample_B = 0.092 * 8388608;
52 static const int sample_C = 0.071 * 8388608;
56 close (int reference, int sample)
58 return abs (reference - sample) < 4096;
64 close (int ref1, int ref2, int ref3, int ref4, int check[4])
66 return close(ref1, check[0]) && close(ref2, check[1]) && close(ref3, check[2]) && close(ref4, check[3]);
70 static int const sync_channel = 13;
71 static int const bytes_per_sample = 3;
75 read_sync_sample (uint8_t const* data, int sample_index, int channels)
77 uint8_t const* p = data + (sample_index * channels * bytes_per_sample) + sync_channel * bytes_per_sample;
78 return static_cast<int>((p[0] << 8) | (p[1] << 16) | (p[2] << 24)) / 256;
82 BOOST_AUTO_TEST_CASE (sync_test1)
84 dcp::SoundAsset asset (private_test / "data" / "atmos_pcm.mxf");
85 shared_ptr<dcp::SoundAssetReader> reader = asset.start_read ();
86 shared_ptr<const dcp::SoundFrame> frame = reader->get_frame (0);
88 /* Read the samples from the first MXF frame of channel 14 and decode them to bits */
89 uint8_t const * data = frame->data ();
91 /* There's 2000 samples which contain 500 bits of data */
92 for (int i = 0; i < 500; ++i) {
94 for (int j = 0; j < 4; ++j) {
95 int sample_index = i * 4 + j;
96 bit[j] = read_sync_sample (data, sample_index, asset.channels());
99 if (close(sample_A, sample_B, sample_B, sample_A, bit)) {
100 ref.push_back (false);
101 } else if (close(-sample_A, -sample_B, -sample_B, -sample_A, bit)) {
102 ref.push_back (false);
103 } else if (close(sample_C, sample_C, -sample_C, -sample_C, bit)) {
104 ref.push_back (true);
105 } else if (close(-sample_C, -sample_C, sample_C, sample_C, bit)) {
106 ref.push_back (true);
112 shared_ptr<dcp::SoundAssetWriter> writer = asset.start_write ("build/test/foo.mxf", true);
114 /* Compare the sync bits made by SoundAssetWriter to the "proper" ones in the MXF */
115 BOOST_CHECK (ref == writer->create_sync_packets());
119 BOOST_AUTO_TEST_CASE (sync_test2)
121 /* Make a MXF with the same ID as atmos_pcm.mxf and write a frame of random stuff */
122 int const channels = 14;
123 dcp::SoundAsset asset (dcp::Fraction(24, 1), 48000, channels, dcp::LanguageTag("en-GB"), dcp::Standard::SMPTE);
124 asset._id = "e004046e09234f90a4ae4355e7e83506";
125 boost::system::error_code ec;
126 boost::filesystem::remove ("build/test/foo.mxf", ec);
127 auto writer = asset.start_write ("build/test/foo.mxf", true);
129 int const frames = 2000;
130 float** junk = new float*[channels];
131 for (int i = 0; i < channels; ++i) {
132 junk[i] = new float[frames];
133 for (int j = 0; j < frames; ++j) {
134 junk[i][j] = float(rand()) / RAND_MAX;
138 writer->write (junk, frames);
139 for (int i = 0; i < channels; ++i) {
145 /* Check that channel 14 on the first frame matches channel 14 on the reference */
146 dcp::SoundAsset ref (private_test / "data" / "atmos_pcm.mxf");
147 dcp::SoundAsset check ("build/test/foo.mxf");
149 shared_ptr<dcp::SoundAssetReader> ref_read = ref.start_read ();
150 shared_ptr<dcp::SoundAssetReader> check_read = check.start_read ();
152 shared_ptr<const dcp::SoundFrame> ref_frame = ref_read->get_frame(0);
153 uint8_t const* ref_data = ref_frame->data();
154 shared_ptr<const dcp::SoundFrame> check_frame = check_read->get_frame(0);
155 uint8_t const* check_data = check_frame->data();
157 for (int i = 0; i < frames; ++i) {
158 int ref_sample = read_sync_sample (ref_data, i, ref.channels());
159 int check_sample = read_sync_sample (check_data, i, check.channels());
160 BOOST_CHECK (abs(ref_sample - check_sample) < 2);