Test signal / silence is in the right place.

1 files changed, 54 insertions, 0 deletions

diff --git a/test/silence_padding_test.cc b/test/silence_padding_test.cc
index e3b0243e0..e12106536 100644
--- a/test/silence_padding_test.cc
+++ b/test/silence_padding_test.cc
@@ -20,6 +20,7 @@
 #include <libdcp/cpl.h>
 #include <libdcp/dcp.h>
 #include <libdcp/sound_asset.h>
+#include <libdcp/sound_frame.h>
 #include <libdcp/reel.h>
 #include "sndfile_content.h"
 
@@ -50,6 +51,59 @@ static void test_silence_padding (int channels)
 	shared_ptr<const libdcp::SoundAsset> sound_asset = check.cpls().front()->reels().front()->main_sound ();
 	BOOST_CHECK (sound_asset);
 	BOOST_CHECK (sound_asset->channels () == channels);
+
+	/* Sample index in the DCP */
+	int n = 0;
+	/* DCP sound asset frame */
+	int frame = 0;
+
+	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())) {
+
+			if (sound_asset->channels() > 0) {
+				/* L should be silent */
+				int const sample = d[i + 0] | (d[i + 1] << 8);
+				BOOST_CHECK_EQUAL (sample, 0);
+			}
+
+			if (sound_asset->channels() > 1) {
+				/* R should be silent */
+				int const sample = d[i + 2] | (d[i + 3] << 8);
+				BOOST_CHECK_EQUAL (sample, 0);
+			}
+			
+			if (sound_asset->channels() > 2) {
+				/* Mono input so it will appear on centre */
+				int const sample = d[i + 7] | (d[i + 8] << 8);
+				BOOST_CHECK_EQUAL (sample, n);
+			}
+
+			if (sound_asset->channels() > 3) {
+				/* Lfe should be silent */
+				int const sample = d[i + 9] | (d[i + 10] << 8);
+				BOOST_CHECK_EQUAL (sample, 0);
+			}
+
+			if (sound_asset->channels() > 4) {
+				/* Ls should be silent */
+				int const sample = d[i + 11] | (d[i + 12] << 8);
+				BOOST_CHECK_EQUAL (sample, 0);
+			}
+
+
+			if (sound_asset->channels() > 5) {
+				/* Rs should be silent */
+				int const sample = d[i + 13] | (d[i + 14] << 8);
+				BOOST_CHECK_EQUAL (sample, 0);
+			}
+
+			++n;
+		}
+	}
+	
 }
 
 BOOST_AUTO_TEST_CASE (silence_padding_test)