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test/test_pcm: merge source buffer generator

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This commit is contained in:
Max Kellermann
2013-01-31 22:58:27 +01:00
parent eab78ab99c
commit e42734c3f3
6 changed files with 118 additions and 109 deletions
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37
test/test_pcm_dither.cxx
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@@ -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);