ref: d55682c2aadbca664727fde886d42d39f7cbb5cd
dir: libvpx/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 tran_low_t *a, tran_low_t *out) {
tran_low_t b[8];
for (int i = 0; i < 8; i += 2) {
b[i + 0] = a[i * 8] + a[(i + 1) * 8];
b[i + 1] = a[i * 8] - a[(i + 1) * 8];
}
tran_low_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) {
tran_low_t input[64];
tran_low_t buf[64];
for (int i = 0; i < 8; ++i) {
for (int j = 0; j < 8; ++j) {
input[i * 8 + j] = static_cast<tran_low_t>(a[i * a_stride + j]);
}
}
for (int i = 0; i < 8; ++i) hadamard_loop(input + i, buf + i * 8);
for (int i = 0; i < 8; ++i) hadamard_loop(buf + i, b + i * 8);
}
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;
}
}
struct HadamardFuncWithSize {
HadamardFuncWithSize(HadamardFunc f, int s) : func(f), block_size(s) {}
HadamardFunc func;
int block_size;
};
std::ostream &operator<<(std::ostream &os, const HadamardFuncWithSize &hfs) {
return os << "block size: " << hfs.block_size;
}
class HadamardTestBase : public ::testing::TestWithParam<HadamardFuncWithSize> {
public:
virtual void SetUp() {
h_func_ = GetParam().func;
bwh_ = GetParam().block_size;
block_size_ = bwh_ * bwh_;
rnd_.Reset(ACMRandom::DeterministicSeed());
}
virtual int16_t Rand() = 0;
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);
}
void CompareReferenceRandom() {
const int kMaxBlockSize = 32 * 32;
DECLARE_ALIGNED(16, int16_t, a[kMaxBlockSize]);
DECLARE_ALIGNED(16, tran_low_t, b[kMaxBlockSize]);
memset(a, 0, sizeof(a));
memset(b, 0, sizeof(b));
tran_low_t b_ref[kMaxBlockSize];
memset(b_ref, 0, sizeof(b_ref));
for (int i = 0; i < block_size_; ++i) a[i] = Rand();
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 + block_size_);
std::sort(b_ref, b_ref + block_size_);
EXPECT_EQ(0, memcmp(b, b_ref, sizeof(b)));
}
void VaryStride() {
const int kMaxBlockSize = 32 * 32;
DECLARE_ALIGNED(16, int16_t, a[kMaxBlockSize * 8]);
DECLARE_ALIGNED(16, tran_low_t, b[kMaxBlockSize]);
memset(a, 0, sizeof(a));
for (int i = 0; i < block_size_ * 8; ++i) a[i] = Rand();
tran_low_t b_ref[kMaxBlockSize];
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 + block_size_);
std::sort(b_ref, b_ref + block_size_);
EXPECT_EQ(0, memcmp(b, b_ref, sizeof(b)));
}
}
void SpeedTest(int times) {
const int kMaxBlockSize = 32 * 32;
DECLARE_ALIGNED(16, int16_t, input[kMaxBlockSize]);
DECLARE_ALIGNED(16, tran_low_t, output[kMaxBlockSize]);
memset(input, 1, sizeof(input));
memset(output, 0, sizeof(output));
vpx_usec_timer timer;
vpx_usec_timer_start(&timer);
for (int i = 0; i < times; ++i) {
h_func_(input, bwh_, output);
}
vpx_usec_timer_mark(&timer);
const int elapsed_time = static_cast<int>(vpx_usec_timer_elapsed(&timer));
printf("Hadamard%dx%d[%12d runs]: %d us\n", bwh_, bwh_, times,
elapsed_time);
}
protected:
int bwh_;
int block_size_;
HadamardFunc h_func_;
ACMRandom rnd_;
};
class HadamardLowbdTest : public HadamardTestBase {
protected:
virtual int16_t Rand() { return rnd_.Rand9Signed(); }
};
TEST_P(HadamardLowbdTest, CompareReferenceRandom) { CompareReferenceRandom(); }
TEST_P(HadamardLowbdTest, VaryStride) { VaryStride(); }
TEST_P(HadamardLowbdTest, DISABLED_Speed) {
SpeedTest(10);
SpeedTest(10000);
SpeedTest(10000000);
}
INSTANTIATE_TEST_SUITE_P(
C, HadamardLowbdTest,
::testing::Values(HadamardFuncWithSize(&vpx_hadamard_8x8_c, 8),
HadamardFuncWithSize(&vpx_hadamard_16x16_c, 16),
HadamardFuncWithSize(&vpx_hadamard_32x32_c, 32)));
#if HAVE_SSE2
INSTANTIATE_TEST_SUITE_P(
SSE2, HadamardLowbdTest,
::testing::Values(HadamardFuncWithSize(&vpx_hadamard_8x8_sse2, 8),
HadamardFuncWithSize(&vpx_hadamard_16x16_sse2, 16),
HadamardFuncWithSize(&vpx_hadamard_32x32_sse2, 32)));
#endif // HAVE_SSE2
#if HAVE_AVX2
INSTANTIATE_TEST_SUITE_P(
AVX2, HadamardLowbdTest,
::testing::Values(HadamardFuncWithSize(&vpx_hadamard_16x16_avx2, 16),
HadamardFuncWithSize(&vpx_hadamard_32x32_avx2, 32)));
#endif // HAVE_AVX2
#if HAVE_SSSE3 && VPX_ARCH_X86_64
INSTANTIATE_TEST_SUITE_P(
SSSE3, HadamardLowbdTest,
::testing::Values(HadamardFuncWithSize(&vpx_hadamard_8x8_ssse3, 8)));
#endif // HAVE_SSSE3 && VPX_ARCH_X86_64
#if HAVE_NEON
INSTANTIATE_TEST_SUITE_P(
NEON, HadamardLowbdTest,
::testing::Values(HadamardFuncWithSize(&vpx_hadamard_8x8_neon, 8),
HadamardFuncWithSize(&vpx_hadamard_16x16_neon, 16)));
#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_SUITE_P(
MSA, HadamardLowbdTest,
::testing::Values(HadamardFuncWithSize(&vpx_hadamard_8x8_msa, 8),
HadamardFuncWithSize(&vpx_hadamard_16x16_msa, 16)));
#endif // HAVE_MSA
#endif // !CONFIG_VP9_HIGHBITDEPTH
#if HAVE_VSX
INSTANTIATE_TEST_SUITE_P(
VSX, HadamardLowbdTest,
::testing::Values(HadamardFuncWithSize(&vpx_hadamard_8x8_vsx, 8),
HadamardFuncWithSize(&vpx_hadamard_16x16_vsx, 16)));
#endif // HAVE_VSX
#if CONFIG_VP9_HIGHBITDEPTH
class HadamardHighbdTest : public HadamardTestBase {
protected:
virtual int16_t Rand() { return rnd_.Rand13Signed(); }
};
TEST_P(HadamardHighbdTest, CompareReferenceRandom) { CompareReferenceRandom(); }
TEST_P(HadamardHighbdTest, VaryStride) { VaryStride(); }
TEST_P(HadamardHighbdTest, DISABLED_Speed) {
SpeedTest(10);
SpeedTest(10000);
SpeedTest(10000000);
}
INSTANTIATE_TEST_SUITE_P(
C, HadamardHighbdTest,
::testing::Values(HadamardFuncWithSize(&vpx_highbd_hadamard_8x8_c, 8),
HadamardFuncWithSize(&vpx_highbd_hadamard_16x16_c, 16),
HadamardFuncWithSize(&vpx_highbd_hadamard_32x32_c, 32)));
#if HAVE_AVX2
INSTANTIATE_TEST_SUITE_P(
AVX2, HadamardHighbdTest,
::testing::Values(HadamardFuncWithSize(&vpx_highbd_hadamard_8x8_avx2, 8),
HadamardFuncWithSize(&vpx_highbd_hadamard_16x16_avx2, 16),
HadamardFuncWithSize(&vpx_highbd_hadamard_32x32_avx2,
32)));
#endif // HAVE_AVX2
#endif // CONFIG_VP9_HIGHBITDEPTH
} // namespace