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-rw-r--r--test/test_pcm_dither.cxx37
1 files changed, 9 insertions, 28 deletions
diff --git a/test/test_pcm_dither.cxx b/test/test_pcm_dither.cxx
index 6d1ed686a..2fb976db5 100644
--- a/test/test_pcm_dither.cxx
+++ b/test/test_pcm_dither.cxx
@@ -18,35 +18,20 @@
*/
#include "test_pcm_all.hxx"
+#include "test_pcm_util.hxx"
#include "PcmDither.hxx"
#include <glib.h>
-/**
- * Generate a random 24 bit PCM sample.
- */
-static int32_t
-random24()
-{
- int32_t x = g_random_int() & 0xffffff;
- if (x & 0x800000)
- x |= 0xff000000;
- return x;
-}
-
void
test_pcm_dither_24()
{
- PcmDither dither;
-
- enum { N = 256 };
- int32_t src[N];
- for (unsigned i = 0; i < N; ++i)
- src[i] = random24();
+ constexpr unsigned N = 256;
+ const auto src = TestDataBuffer<int32_t, N>(GlibRandomInt24());
int16_t dest[N];
-
- dither.Dither24To16(dest, src, src + N);
+ PcmDither dither;
+ dither.Dither24To16(dest, src.begin(), src.end());
for (unsigned i = 0; i < N; ++i) {
g_assert_cmpint(dest[i], >=, (src[i] >> 8) - 8);
@@ -57,16 +42,12 @@ test_pcm_dither_24()
void
test_pcm_dither_32()
{
- PcmDither dither;
-
- enum { N = 256 };
- int32_t src[N];
- for (unsigned i = 0; i < N; ++i)
- src[i] = g_random_int();
+ constexpr unsigned N = 256;
+ const auto src = TestDataBuffer<int32_t, N>();
int16_t dest[N];
-
- dither.Dither32To16(dest, src, src + N);
+ PcmDither dither;
+ dither.Dither32To16(dest, src.begin(), src.end());
for (unsigned i = 0; i < N; ++i) {
g_assert_cmpint(dest[i], >=, (src[i] >> 16) - 8);