Add support for Datasat AP2x and USL sound processors when converting

fader position to gain.   Stop storing a chosen processor in config;
instead, get the user to choose the processor when calculating gains.

2 files changed, 85 insertions, 0 deletions

diff --git a/test/cinema_sound_processor_test.cc b/test/cinema_sound_processor_test.cc
new file mode 100644
index 000000000..b17fd19f9
--- /dev/null
+++ b/test/cinema_sound_processor_test.cc
@@ -0,0 +1,84 @@
+/*
+    Copyright (C) 2019 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/>.
+
+*/
+
+#include "lib/dolby_cp750.h"
+#include "lib/usl.h"
+#include "lib/datasat_ap2x.h"
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_CASE (dolby_cp750_test)
+{
+	DolbyCP750 ap;
+
+	/* No change */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(7, 7), 0, 0.1);
+	/* Within 0->4 range, up */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(1, 3), 40, 0.1);
+	/* Within 0->4 range, down */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(3, 1), -40, 0.1);
+	/* Within 4->10 range, up */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(5, 8), 10, 0.1);
+	/* Within 4->10 range, down */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(8, 5), -10, 0.1);
+	/* Crossing knee, up */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(3, 6), 20 + 6.66666666666666666, 0.1);
+	/* Crossing knee, down */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(6, 3), -(20 + 6.66666666666666666), 0.1);
+}
+
+BOOST_AUTO_TEST_CASE (usl_test)
+{
+	USL ap;
+
+	/* No change */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(7, 7), 0, 0.1);
+	/* Within 0->5.5 range, up */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(1, 3), 20, 0.1);
+	/* Within 0->5.5 range, down */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(3, 1), -20, 0.1);
+	/* Within 5.5->10 range, up */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(6, 9), 10, 0.1);
+	/* Within 5.5->10 range, down */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(9, 6), -10, 0.1);
+	/* Crossing knee, up */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(3, 6), (2.5 * 10 + 0.5 * 3.333333333333333333), 0.1);
+	/* Crossing knee, down */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(6, 3), -(2.5 * 10 + 0.5 * 3.333333333333333333), 0.1);
+}
+
+BOOST_AUTO_TEST_CASE (datasat_ap2x_test)
+{
+	DatasatAP2x ap;
+
+	/* No change */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(7, 7), 0, 0.1);
+	/* Within 0->3.2 range, up */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(0, 2), 40, 0.1);
+	/* Within 0->3.2 range, down */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(2, 0), -40, 0.1);
+	/* Within 3.2->10 range, up */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(6, 9), 15, 0.1);
+	/* Within 3.2->10 range, down */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(9, 6), -15, 0.1);
+	/* Crossing knee, up */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(3, 6), (0.2 * 20 + 2.8 * 5), 0.1);
+	/* Crossing knee, down */
+	BOOST_CHECK_CLOSE (ap.db_for_fader_change(6, 3), -(0.2 * 20 + 2.8 * 5), 0.1);
+}
diff --git a/test/wscript b/test/wscript
index d3f4a5382..06687cd17 100644
--- a/test/wscript
+++ b/test/wscript
@@ -52,6 +52,7 @@ def build(bld):
                  audio_processor_delay_test.cc
                  audio_ring_buffers_test.cc
                  butler_test.cc
+                 cinema_sound_processor_test.cc
                  client_server_test.cc
                  closed_caption_test.cc
                  colour_conversion_test.cc