Add test for audio delay, and do it in the player rather than the decoder.

1 files changed, 89 insertions, 0 deletions

diff --git a/test/audio_delay_test.cc b/test/audio_delay_test.cc
new file mode 100644
index 000000000..5574bd627
--- /dev/null
+++ b/test/audio_delay_test.cc
@@ -0,0 +1,89 @@
+/*
+    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <libdcp/sound_frame.h>
+#include <libdcp/cpl.h>
+#include <libdcp/reel.h>
+#include <libdcp/sound_asset.h>
+#include "sndfile_content.h"
+
+using boost::lexical_cast;
+
+static
+void test_audio_delay (int delay_in_ms)
+{
+	string const film_name = "audio_delay_test_" + lexical_cast<string> (delay_in_ms);
+	shared_ptr<Film> film = new_test_film (film_name);
+	film->set_dcp_content_type (DCPContentType::from_dci_name ("FTR"));
+	film->set_container (Ratio::from_id ("185"));
+	film->set_name (film_name);
+
+	shared_ptr<SndfileContent> content (new SndfileContent (film, "test/data/staircase.wav"));
+	content->set_audio_delay (delay_in_ms);
+	film->examine_and_add_content (content);
+	wait_for_jobs ();
+
+	film->make_dcp ();
+	wait_for_jobs ();
+
+	boost::filesystem::path path = "build/test";
+	path /= film_name;
+	path /= film->dcp_name ();
+	libdcp::DCP check (path.string ());
+	check.read ();
+
+	shared_ptr<const libdcp::SoundAsset> 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;
+	bool done = false;
+
+	while (n < sound_asset->intrinsic_duration()) {
+		shared_ptr<const libdcp::SoundFrame> sound_frame = sound_asset->get_frame (frame++);
+		uint8_t const * d = sound_frame->data ();
+		
+		for (int i = 0; i < sound_frame->size(); i += (3 * sound_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_CHECK_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);
+}