From afcf0795c44260f54e74ec854297de439e7562c3 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Sun, 22 Dec 2013 17:39:26 +0100
Subject: pcm/Volume: improved dithering

Instead of just adding a rectangular random value before shifting back
to the normal scale, use the existing PcmDither library.
---
 test/test_pcm_volume.cxx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'test/test_pcm_volume.cxx')

diff --git a/test/test_pcm_volume.cxx b/test/test_pcm_volume.cxx
index bba5d3bbf..c3a261f7a 100644
--- a/test/test_pcm_volume.cxx
+++ b/test/test_pcm_volume.cxx
@@ -60,8 +60,9 @@ TestVolume(G g=G())
 
 	const auto _dest = ConstBuffer<value_type>::FromVoid(dest);
 	for (unsigned i = 0; i < N; ++i) {
-		CPPUNIT_ASSERT(_dest.data[i] >= (_src[i] - 1) / 2);
-		CPPUNIT_ASSERT(_dest.data[i] <= _src[i] / 2 + 1);
+		const auto expected = (_src[i] + 1) / 2;
+		CPPUNIT_ASSERT(_dest.data[i] >= expected - 4);
+		CPPUNIT_ASSERT(_dest.data[i] <= expected + 4);
 	}
 
 	pv.Close();
-- 
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