2 Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include <libdcp/sound_frame.h>
21 #include <libdcp/cpl.h>
22 #include <libdcp/reel.h>
23 #include <libdcp/sound_asset.h>
24 #include "sndfile_content.h"
26 using boost::lexical_cast;
29 void test_audio_delay (int delay_in_ms)
31 string const film_name = "audio_delay_test_" + lexical_cast<string> (delay_in_ms);
32 shared_ptr<Film> film = new_test_film (film_name);
33 film->set_dcp_content_type (DCPContentType::from_dci_name ("FTR"));
34 film->set_container (Ratio::from_id ("185"));
35 film->set_name (film_name);
37 shared_ptr<SndfileContent> content (new SndfileContent (film, "test/data/staircase.wav"));
38 content->set_audio_delay (delay_in_ms);
39 film->examine_and_add_content (content);
45 boost::filesystem::path path = "build/test";
47 path /= film->dcp_name ();
48 libdcp::DCP check (path.string ());
51 shared_ptr<const libdcp::SoundAsset> sound_asset = check.cpls().front()->reels().front()->main_sound ();
52 BOOST_CHECK (sound_asset);
54 /* Sample index in the DCP */
56 /* DCP sound asset frame */
59 int const delay_in_frames = delay_in_ms * 48000 / 1000;
62 while (n < sound_asset->intrinsic_duration()) {
63 shared_ptr<const libdcp::SoundFrame> sound_frame = sound_asset->get_frame (frame++);
64 uint8_t const * d = sound_frame->data ();
66 for (int i = 0; i < sound_frame->size(); i += (3 * sound_asset->channels())) {
68 /* Mono input so it will appear on centre */
69 int const sample = d[i + 7] | (d[i + 8] << 8);
71 int delayed = n - delay_in_frames;
72 if (delayed < 0 || delayed >= 4800) {
76 BOOST_CHECK_EQUAL (sample, delayed);
83 /* Test audio delay when specified in a piece of audio content */
84 BOOST_AUTO_TEST_CASE (audio_delay_test)
87 test_audio_delay (42);
88 test_audio_delay (-66);