ref: 4635b0fced6df4b371454b52cfd512c14eec1f76
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 "vpx_ports/vpx_timer.h"
#include "test/acm_random.h"
#include "test/register_state_check.h"
namespace {
using ::libvpx_test::ACMRandom;
typedef void (*HadamardFunc)(const int16_t *a, ptrdiff_t a_stride,
tran_low_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, tran_low_t *b) {
int16_t buf[64];
int16_t buf2[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, buf2 + i * 8);
for (int i = 0; i < 64; ++i) b[i] = (tran_low_t)buf2[i];
}
void reference_hadamard16x16(const int16_t *a, int a_stride, tran_low_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 tran_low_t a0 = b[0];
const tran_low_t a1 = b[64];
const tran_low_t a2 = b[128];
const tran_low_t a3 = b[192];
/* Prevent the result from escaping int16_t. */
const tran_low_t b0 = (a0 + a1) >> 1;
const tran_low_t b1 = (a0 - a1) >> 1;
const tran_low_t b2 = (a2 + a3) >> 1;
const tran_low_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;
}
}
void reference_hadamard32x32(const int16_t *a, int a_stride, tran_low_t *b) {
reference_hadamard16x16(a + 0 + 0 * a_stride, a_stride, b + 0);
reference_hadamard16x16(a + 16 + 0 * a_stride, a_stride, b + 256);
reference_hadamard16x16(a + 0 + 16 * a_stride, a_stride, b + 512);
reference_hadamard16x16(a + 16 + 16 * a_stride, a_stride, b + 768);
for (int i = 0; i < 256; ++i) {
const tran_low_t a0 = b[0];
const tran_low_t a1 = b[256];
const tran_low_t a2 = b[512];
const tran_low_t a3 = b[768];
const tran_low_t b0 = (a0 + a1) >> 2;
const tran_low_t b1 = (a0 - a1) >> 2;
const tran_low_t b2 = (a2 + a3) >> 2;
const tran_low_t b3 = (a2 - a3) >> 2;
b[0] = b0 + b2;
b[256] = b1 + b3;
b[512] = b0 - b2;
b[768] = b1 - b3;
++b;
}
}
class HadamardTestBase : public ::testing::TestWithParam<HadamardFunc> {
public:
virtual void SetUp() {
h_func_ = GetParam();
rnd_.Reset(ACMRandom::DeterministicSeed());
}
void ReferenceHadamard(const int16_t *a, int a_stride, tran_low_t *b,
int bwh) {
if (bwh == 32)
reference_hadamard32x32(a, a_stride, b);
else if (bwh == 16)
reference_hadamard16x16(a, a_stride, b);
else
reference_hadamard8x8(a, a_stride, b);
}
template <int bwh>
void CompareReferenceRandom() {
const int kBlockSize = bwh * bwh;
DECLARE_ALIGNED(16, int16_t, a[kBlockSize]);
DECLARE_ALIGNED(16, tran_low_t, b[kBlockSize]);
tran_low_t b_ref[kBlockSize];
for (int i = 0; i < kBlockSize; ++i) {
a[i] = rnd_.Rand9Signed();
}
memset(b, 0, sizeof(b));
memset(b_ref, 0, sizeof(b_ref));
ReferenceHadamard(a, bwh, b_ref, bwh);
ASM_REGISTER_STATE_CHECK(h_func_(a, bwh, b));
// The order of the output is not important. Sort before checking.
std::sort(b, b + kBlockSize);
std::sort(b_ref, b_ref + kBlockSize);
EXPECT_EQ(0, memcmp(b, b_ref, sizeof(b)));
}
template <int bwh>
void VaryStride() {
const int kBlockSize = bwh * bwh;
DECLARE_ALIGNED(16, int16_t, a[kBlockSize * 8]);
DECLARE_ALIGNED(16, tran_low_t, b[kBlockSize]);
tran_low_t b_ref[kBlockSize];
for (int i = 0; i < kBlockSize * 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));
ReferenceHadamard(a, i, b_ref, bwh);
ASM_REGISTER_STATE_CHECK(h_func_(a, i, b));
// The order of the output is not important. Sort before checking.
std::sort(b, b + kBlockSize);
std::sort(b_ref, b_ref + kBlockSize);
EXPECT_EQ(0, memcmp(b, b_ref, sizeof(b)));
}
}
protected:
HadamardFunc h_func_;
ACMRandom rnd_;
};
void HadamardSpeedTest(const char *name, HadamardFunc const func,
const int16_t *input, int stride, tran_low_t *output,
int times) {
int i;
vpx_usec_timer timer;
vpx_usec_timer_start(&timer);
for (i = 0; i < times; ++i) {
func(input, stride, output);
}
vpx_usec_timer_mark(&timer);
const int elapsed_time = static_cast<int>(vpx_usec_timer_elapsed(&timer));
printf("%s[%12d runs]: %d us\n", name, times, elapsed_time);
}
class Hadamard8x8Test : public HadamardTestBase {};
void HadamardSpeedTest8x8(HadamardFunc const func, int times) {
DECLARE_ALIGNED(16, int16_t, input[64]);
DECLARE_ALIGNED(16, tran_low_t, output[64]);
memset(input, 1, sizeof(input));
HadamardSpeedTest("Hadamard8x8", func, input, 8, output, times);
}
TEST_P(Hadamard8x8Test, CompareReferenceRandom) { CompareReferenceRandom<8>(); }
TEST_P(Hadamard8x8Test, VaryStride) { VaryStride<8>(); }
TEST_P(Hadamard8x8Test, DISABLED_Speed) {
HadamardSpeedTest8x8(h_func_, 10);
HadamardSpeedTest8x8(h_func_, 10000);
HadamardSpeedTest8x8(h_func_, 10000000);
}
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
// TODO(jingning): Remove highbitdepth flag when the SIMD functions are
// in place and turn on the unit test.
#if !CONFIG_VP9_HIGHBITDEPTH
#if HAVE_MSA
INSTANTIATE_TEST_CASE_P(MSA, Hadamard8x8Test,
::testing::Values(&vpx_hadamard_8x8_msa));
#endif // HAVE_MSA
#endif // !CONFIG_VP9_HIGHBITDEPTH
#if HAVE_VSX
INSTANTIATE_TEST_CASE_P(VSX, Hadamard8x8Test,
::testing::Values(&vpx_hadamard_8x8_vsx));
#endif // HAVE_VSX
class Hadamard16x16Test : public HadamardTestBase {};
void HadamardSpeedTest16x16(HadamardFunc const func, int times) {
DECLARE_ALIGNED(16, int16_t, input[256]);
DECLARE_ALIGNED(16, tran_low_t, output[256]);
memset(input, 1, sizeof(input));
HadamardSpeedTest("Hadamard16x16", func, input, 16, output, times);
}
TEST_P(Hadamard16x16Test, CompareReferenceRandom) {
CompareReferenceRandom<16>();
}
TEST_P(Hadamard16x16Test, VaryStride) { VaryStride<16>(); }
TEST_P(Hadamard16x16Test, DISABLED_Speed) {
HadamardSpeedTest16x16(h_func_, 10);
HadamardSpeedTest16x16(h_func_, 10000);
HadamardSpeedTest16x16(h_func_, 10000000);
}
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_AVX2
INSTANTIATE_TEST_CASE_P(AVX2, Hadamard16x16Test,
::testing::Values(&vpx_hadamard_16x16_avx2));
#endif // HAVE_AVX2
#if HAVE_VSX
INSTANTIATE_TEST_CASE_P(VSX, Hadamard16x16Test,
::testing::Values(&vpx_hadamard_16x16_vsx));
#endif // HAVE_VSX
#if HAVE_NEON
INSTANTIATE_TEST_CASE_P(NEON, Hadamard16x16Test,
::testing::Values(&vpx_hadamard_16x16_neon));
#endif // HAVE_NEON
#if !CONFIG_VP9_HIGHBITDEPTH
#if HAVE_MSA
INSTANTIATE_TEST_CASE_P(MSA, Hadamard16x16Test,
::testing::Values(&vpx_hadamard_16x16_msa));
#endif // HAVE_MSA
#endif // !CONFIG_VP9_HIGHBITDEPTH
class Hadamard32x32Test : public HadamardTestBase {};
void HadamardSpeedTest32x32(HadamardFunc const func, int times) {
DECLARE_ALIGNED(16, int16_t, input[1024]);
DECLARE_ALIGNED(16, tran_low_t, output[1024]);
memset(input, 1, sizeof(input));
HadamardSpeedTest("Hadamard32x32", func, input, 32, output, times);
}
TEST_P(Hadamard32x32Test, CompareReferenceRandom) {
CompareReferenceRandom<32>();
}
TEST_P(Hadamard32x32Test, VaryStride) { VaryStride<32>(); }
TEST_P(Hadamard32x32Test, DISABLED_Speed) {
HadamardSpeedTest32x32(h_func_, 10);
HadamardSpeedTest32x32(h_func_, 10000);
HadamardSpeedTest32x32(h_func_, 10000000);
}
INSTANTIATE_TEST_CASE_P(C, Hadamard32x32Test,
::testing::Values(&vpx_hadamard_32x32_c));
#if HAVE_SSE2
INSTANTIATE_TEST_CASE_P(SSE2, Hadamard32x32Test,
::testing::Values(&vpx_hadamard_32x32_sse2));
#endif // HAVE_SSE2
#if HAVE_AVX2
INSTANTIATE_TEST_CASE_P(AVX2, Hadamard32x32Test,
::testing::Values(&vpx_hadamard_32x32_avx2));
#endif // HAVE_AVX2
} // namespace