--- /dev/null
+/*
+ Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
+
+ This file is part of libdcp.
+
+ libdcp is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ libdcp is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with libdcp. If not, see <http://www.gnu.org/licenses/>.
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of portions of this program with the
+ OpenSSL library under certain conditions as described in each
+ individual source file, and distribute linked combinations
+ including the two.
+
+ You must obey the GNU General Public License in all respects
+ for all of the code used other than OpenSSL. If you modify
+ file(s) with this exception, you may extend this exception to your
+ version of the file(s), but you are not obligated to do so. If you
+ do not wish to do so, delete this exception statement from your
+ version. If you delete this exception statement from all source
+ files in the program, then also delete it here.
+*/
+
+
+#include "sound_asset.h"
+#include "sound_asset_reader.h"
+#include "sound_asset_writer.h"
+#include "test.h"
+#include <boost/filesystem.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/test/unit_test.hpp>
+#include <vector>
+
+
+using std::vector;
+using boost::shared_array;
+using boost::shared_ptr;
+
+
+static const int sample_A = 0.038 * 8388608;
+static const int sample_B = 0.092 * 8388608;
+static const int sample_C = 0.071 * 8388608;
+
+static
+bool
+close (int reference, int sample)
+{
+ return abs (reference - sample) < 4096;
+}
+
+
+static
+bool
+close (int ref1, int ref2, int ref3, int ref4, int check[4])
+{
+ return close(ref1, check[0]) && close(ref2, check[1]) && close(ref3, check[2]) && close(ref4, check[3]);
+}
+
+
+static int const sync_channel = 13;
+static int const bytes_per_sample = 3;
+
+
+static int
+read_sync_sample (uint8_t const* data, int sample_index, int channels)
+{
+ uint8_t const* p = data + (sample_index * channels * bytes_per_sample) + sync_channel * bytes_per_sample;
+ return static_cast<int>((p[0] << 8) | (p[1] << 16) | (p[2] << 24)) / 256;
+}
+
+
+BOOST_AUTO_TEST_CASE (sync_test1)
+{
+ dcp::SoundAsset asset (private_test / "atmos_pcm.mxf");
+ shared_ptr<dcp::SoundAssetReader> reader = asset.start_read ();
+ shared_ptr<const dcp::SoundFrame> frame = reader->get_frame (0);
+
+ /* Read the samples from the first MXF frame of channel 14 and decode them to bits */
+ uint8_t const * data = frame->data ();
+ vector<bool> ref;
+ /* There's 2000 samples which contain 500 bits of data */
+ for (int i = 0; i < 500; ++i) {
+ int bit[4];
+ for (int j = 0; j < 4; ++j) {
+ int sample_index = i * 4 + j;
+ bit[j] = read_sync_sample (data, sample_index, asset.channels());
+ }
+
+ if (close(sample_A, sample_B, sample_B, sample_A, bit)) {
+ ref.push_back (false);
+ } else if (close(-sample_A, -sample_B, -sample_B, -sample_A, bit)) {
+ ref.push_back (false);
+ } else if (close(sample_C, sample_C, -sample_C, -sample_C, bit)) {
+ ref.push_back (true);
+ } else if (close(-sample_C, -sample_C, sample_C, sample_C, bit)) {
+ ref.push_back (true);
+ } else {
+ BOOST_CHECK (false);
+ }
+ }
+
+ shared_ptr<dcp::SoundAssetWriter> writer = asset.start_write ("build/test/foo.mxf", true);
+
+ /* Compare the sync bits made by SoundAssetWriter to the "proper" ones in the MXF */
+ BOOST_CHECK (ref == writer->create_sync_packets());
+}
+
+
+BOOST_AUTO_TEST_CASE (sync_test2)
+{
+ /* Make a MXF with the same ID as atmos_pcm.mxf and write a frame of random stuff */
+ int const channels = 14;
+ dcp::SoundAsset asset (dcp::Fraction(24, 1), 48000, channels, dcp::SMPTE);
+ asset._id = "e004046e09234f90a4ae4355e7e83506";
+ boost::system::error_code ec;
+ boost::filesystem::remove ("build/test/foo.mxf", ec);
+ shared_ptr<dcp::SoundAssetWriter> writer = asset.start_write ("build/test/foo.mxf", true);
+
+ int const frames = 2000;
+ float** junk = new float*[channels];
+ for (int i = 0; i < channels; ++i) {
+ junk[i] = new float[frames];
+ for (int j = 0; j < frames; ++j) {
+ junk[i][j] = float(rand()) / RAND_MAX;
+ }
+ }
+
+ writer->write (junk, frames);
+ for (int i = 0; i < channels; ++i) {
+ delete[] junk[i];
+ }
+ delete[] junk;
+ writer->finalize ();
+
+ /* Check that channel 14 on the first frame matches channel 14 on the reference */
+ dcp::SoundAsset ref (private_test / "atmos_pcm.mxf");
+ dcp::SoundAsset check ("build/test/foo.mxf");
+
+ shared_ptr<dcp::SoundAssetReader> ref_read = ref.start_read ();
+ shared_ptr<dcp::SoundAssetReader> check_read = check.start_read ();
+
+ shared_ptr<const dcp::SoundFrame> ref_frame = ref_read->get_frame(0);
+ uint8_t const* ref_data = ref_frame->data();
+ shared_ptr<const dcp::SoundFrame> check_frame = check_read->get_frame(0);
+ uint8_t const* check_data = check_frame->data();
+
+ for (int i = 0; i < frames; ++i) {
+ int ref_sample = read_sync_sample (ref_data, i, ref.channels());
+ int check_sample = read_sync_sample (check_data, i, check.channels());
+ BOOST_CHECK (abs(ref_sample - check_sample) < 2);
+ }
+}
+
projects / libdcp.git / blobdiff