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/*
Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
/** @defgroup feature Tests of features */
/** @file test/audio_delay_test.cc
* @brief Test encode using some FFmpegContents which have audio delays.
* @ingroup feature
*
* The output is checked algorithmically using knowledge of the input.
*/
#include "lib/audio_content.h"
#include "lib/dcp_content_type.h"
#include "lib/ffmpeg_content.h"
#include "lib/film.h"
#include "lib/ratio.h"
#include "test.h"
#include <dcp/cpl.h>
#include <dcp/reel.h>
#include <dcp/reel_sound_asset.h>
#include <dcp/sound_asset.h>
#include <dcp/sound_asset_reader.h>
#include <dcp/sound_frame.h>
#include <boost/test/unit_test.hpp>
#include <iostream>
using std::cout;
using std::make_shared;
using std::shared_ptr;
using std::string;
using boost::lexical_cast;
static
void test_audio_delay (int delay_in_ms)
{
BOOST_TEST_MESSAGE ("Testing delay of " << delay_in_ms);
string const film_name = "audio_delay_test_" + lexical_cast<string> (delay_in_ms);
auto content = make_shared<FFmpegContent>("test/data/staircase.wav");
shared_ptr<Film> film = new_test_film2 (
film_name, { content }
);
content->audio->set_delay (delay_in_ms);
make_and_verify_dcp (film, { dcp::VerificationNote::Code::MISSING_CPL_METADATA });
boost::filesystem::path path = "build/test";
path /= film_name;
path /= film->dcp_name ();
std::cout << "Loading " << path.string() << "\n";
dcp::DCP check (path.string ());
check.read ();
auto sound_asset = check.cpls().front()->reels().front()->main_sound ();
BOOST_CHECK (sound_asset);
/* Sample index in the DCP */
int n = 0;
/* DCP sound asset frame */
int frame = 0;
/* Delay in frames */
int const delay_in_frames = delay_in_ms * 48000 / 1000;
while (n < sound_asset->asset()->intrinsic_duration()) {
shared_ptr<const dcp::SoundFrame> sound_frame = sound_asset->asset()->start_read()->get_frame (frame++);
uint8_t const * d = sound_frame->data ();
for (int i = 0; i < sound_frame->size(); i += (3 * sound_asset->asset()->channels())) {
/* Mono input so it will appear on centre */
int const sample = d[i + 7] | (d[i + 8] << 8);
int delayed = n - delay_in_frames;
if (delayed < 0 || delayed >= 4800) {
delayed = 0;
}
BOOST_REQUIRE_EQUAL (sample, delayed);
++n;
}
}
}
/* Test audio delay when specified in a piece of audio content */
BOOST_AUTO_TEST_CASE (audio_delay_test)
{
test_audio_delay (0);
test_audio_delay (42);
test_audio_delay (-66);
}
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