ref: 62cce50d55cff857ef641553bc991b499645f923
dir: /test/hadamard_test.cc/
/*
* Copyright (c) 2016 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <algorithm>
#include "third_party/googletest/src/include/gtest/gtest.h"
#include "./vpx_dsp_rtcd.h"
#include "test/acm_random.h"
#include "test/register_state_check.h"
namespace {
using ::libvpx_test::ACMRandom;
typedef void (*HadamardFunc)(const int16_t *a, int a_stride, int16_t *b);
void hadamard_loop(const int16_t *a, int a_stride, int16_t *out) {
int16_t b[8];
for (int i = 0; i < 8; i += 2) {
b[i + 0] = a[i * a_stride] + a[(i + 1) * a_stride];
b[i + 1] = a[i * a_stride] - a[(i + 1) * a_stride];
}
int16_t c[8];
for (int i = 0; i < 8; i += 4) {
c[i + 0] = b[i + 0] + b[i + 2];
c[i + 1] = b[i + 1] + b[i + 3];
c[i + 2] = b[i + 0] - b[i + 2];
c[i + 3] = b[i + 1] - b[i + 3];
}
out[0] = c[0] + c[4];
out[7] = c[1] + c[5];
out[3] = c[2] + c[6];
out[4] = c[3] + c[7];
out[2] = c[0] - c[4];
out[6] = c[1] - c[5];
out[1] = c[2] - c[6];
out[5] = c[3] - c[7];
}
void reference_hadamard8x8(const int16_t *a, int a_stride, int16_t *b) {
int16_t buf[64];
for (int i = 0; i < 8; ++i) {
hadamard_loop(a + i, a_stride, buf + i * 8);
}
for (int i = 0; i < 8; ++i) {
hadamard_loop(buf + i, 8, b + i * 8);
}
}
void reference_hadamard16x16(const int16_t *a, int a_stride, int16_t *b) {
/* The source is a 16x16 block. The destination is rearranged to 8x32.
* Input is 9 bit. */
reference_hadamard8x8(a + 0 + 0 * a_stride, a_stride, b + 0);
reference_hadamard8x8(a + 8 + 0 * a_stride, a_stride, b + 64);
reference_hadamard8x8(a + 0 + 8 * a_stride, a_stride, b + 128);
reference_hadamard8x8(a + 8 + 8 * a_stride, a_stride, b + 192);
/* Overlay the 8x8 blocks and combine. */
for (int i = 0; i < 64; ++i) {
/* 8x8 steps the range up to 15 bits. */
const int16_t a0 = b[0];
const int16_t a1 = b[64];
const int16_t a2 = b[128];
const int16_t a3 = b[192];
/* Prevent the result from escaping int16_t. */
const int16_t b0 = (a0 + a1) >> 1;
const int16_t b1 = (a0 - a1) >> 1;
const int16_t b2 = (a2 + a3) >> 1;
const int16_t b3 = (a2 - a3) >> 1;
/* Store a 16 bit value. */
b[0] = b0 + b2;
b[64] = b1 + b3;
b[128] = b0 - b2;
b[192] = b1 - b3;
++b;
}
}
class HadamardTestBase : public ::testing::TestWithParam<HadamardFunc> {
public:
virtual void SetUp() {
h_func_ = GetParam();
rnd_.Reset(ACMRandom::DeterministicSeed());
}
protected:
HadamardFunc h_func_;
ACMRandom rnd_;
};
class Hadamard8x8Test : public HadamardTestBase {};
TEST_P(Hadamard8x8Test, CompareReferenceRandom) {
DECLARE_ALIGNED(16, int16_t, a[64]);
DECLARE_ALIGNED(16, int16_t, b[64]);
int16_t b_ref[64];
for (int i = 0; i < 64; ++i) {
a[i] = rnd_.Rand9Signed();
}
memset(b, 0, sizeof(b));
memset(b_ref, 0, sizeof(b_ref));
reference_hadamard8x8(a, 8, b_ref);
ASM_REGISTER_STATE_CHECK(h_func_(a, 8, b));
// The order of the output is not important. Sort before checking.
std::sort(b, b + 64);
std::sort(b_ref, b_ref + 64);
EXPECT_EQ(0, memcmp(b, b_ref, sizeof(b)));
}
TEST_P(Hadamard8x8Test, VaryStride) {
DECLARE_ALIGNED(16, int16_t, a[64 * 8]);
DECLARE_ALIGNED(16, int16_t, b[64]);
int16_t b_ref[64];
for (int i = 0; i < 64 * 8; ++i) {
a[i] = rnd_.Rand9Signed();
}
for (int i = 8; i < 64; i += 8) {
memset(b, 0, sizeof(b));
memset(b_ref, 0, sizeof(b_ref));
reference_hadamard8x8(a, i, b_ref);
ASM_REGISTER_STATE_CHECK(h_func_(a, i, b));
// The order of the output is not important. Sort before checking.
std::sort(b, b + 64);
std::sort(b_ref, b_ref + 64);
EXPECT_EQ(0, memcmp(b, b_ref, sizeof(b)));
}
}
INSTANTIATE_TEST_CASE_P(C, Hadamard8x8Test,
::testing::Values(&vpx_hadamard_8x8_c));
#if HAVE_SSE2
INSTANTIATE_TEST_CASE_P(SSE2, Hadamard8x8Test,
::testing::Values(&vpx_hadamard_8x8_sse2));
#endif // HAVE_SSE2
#if HAVE_SSSE3 && ARCH_X86_64
INSTANTIATE_TEST_CASE_P(SSSE3, Hadamard8x8Test,
::testing::Values(&vpx_hadamard_8x8_ssse3));
#endif // HAVE_SSSE3 && ARCH_X86_64
#if HAVE_NEON
INSTANTIATE_TEST_CASE_P(NEON, Hadamard8x8Test,
::testing::Values(&vpx_hadamard_8x8_neon));
#endif // HAVE_NEON
class Hadamard16x16Test : public HadamardTestBase {};
TEST_P(Hadamard16x16Test, CompareReferenceRandom) {
DECLARE_ALIGNED(16, int16_t, a[16 * 16]);
DECLARE_ALIGNED(16, int16_t, b[16 * 16]);
int16_t b_ref[16 * 16];
for (int i = 0; i < 16 * 16; ++i) {
a[i] = rnd_.Rand9Signed();
}
memset(b, 0, sizeof(b));
memset(b_ref, 0, sizeof(b_ref));
reference_hadamard16x16(a, 16, b_ref);
ASM_REGISTER_STATE_CHECK(h_func_(a, 16, b));
// The order of the output is not important. Sort before checking.
std::sort(b, b + 16 * 16);
std::sort(b_ref, b_ref + 16 * 16);
EXPECT_EQ(0, memcmp(b, b_ref, sizeof(b)));
}
TEST_P(Hadamard16x16Test, VaryStride) {
DECLARE_ALIGNED(16, int16_t, a[16 * 16 * 8]);
DECLARE_ALIGNED(16, int16_t, b[16 * 16]);
int16_t b_ref[16 * 16];
for (int i = 0; i < 16 * 16 * 8; ++i) {
a[i] = rnd_.Rand9Signed();
}
for (int i = 8; i < 64; i += 8) {
memset(b, 0, sizeof(b));
memset(b_ref, 0, sizeof(b_ref));
reference_hadamard16x16(a, i, b_ref);
ASM_REGISTER_STATE_CHECK(h_func_(a, i, b));
// The order of the output is not important. Sort before checking.
std::sort(b, b + 16 * 16);
std::sort(b_ref, b_ref + 16 * 16);
EXPECT_EQ(0, memcmp(b, b_ref, sizeof(b)));
}
}
INSTANTIATE_TEST_CASE_P(C, Hadamard16x16Test,
::testing::Values(&vpx_hadamard_16x16_c));
#if HAVE_SSE2
INSTANTIATE_TEST_CASE_P(SSE2, Hadamard16x16Test,
::testing::Values(&vpx_hadamard_16x16_sse2));
#endif // HAVE_SSE2
#if HAVE_NEON
INSTANTIATE_TEST_CASE_P(NEON, Hadamard16x16Test,
::testing::Values(&vpx_hadamard_16x16_neon));
#endif // HAVE_NEON
} // namespace