generic-library/vpx
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buffer.h: allow declaring an alignment

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x86 simd register operations generally prefer and may require 16 byte
alignment.

Change-Id: I73ce577a90dc66af60743c5727c36f23200950ba
This commit is contained in:
Johann 2017-06-06 15:15:47 -07:00
parent e50ea014c3
commit 5aee8ea752
2 changed files with 86 additions and 42 deletions
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46
test/buffer.h
View File

@ -19,6 +19,7 @@
#include "test/acm_random.h"
#include "vpx/vpx_integer.h"
#include "vpx_mem/vpx_mem.h"
namespace libvpx_test {
@ -29,16 +30,36 @@ class Buffer {
int right_padding, int bottom_padding)
: width_(width), height_(height), top_padding_(top_padding),
left_padding_(left_padding), right_padding_(right_padding),
bottom_padding_(bottom_padding), padding_value_(0), stride_(0),
raw_size_(0), num_elements_(0), raw_buffer_(NULL) {}
bottom_padding_(bottom_padding), alignment_(0), padding_value_(0),
stride_(0), raw_size_(0), num_elements_(0), raw_buffer_(NULL) {}
Buffer(int width, int height, int top_padding, int left_padding,
int right_padding, int bottom_padding, unsigned int alignment)
: width_(width), height_(height), top_padding_(top_padding),
left_padding_(left_padding), right_padding_(right_padding),
bottom_padding_(bottom_padding), alignment_(alignment),
padding_value_(0), stride_(0), raw_size_(0), num_elements_(0),
raw_buffer_(NULL) {}
Buffer(int width, int height, int padding)
: width_(width), height_(height), top_padding_(padding),
left_padding_(padding), right_padding_(padding),
bottom_padding_(padding), padding_value_(0), stride_(0), raw_size_(0),
num_elements_(0), raw_buffer_(NULL) {}
bottom_padding_(padding), alignment_(0), padding_value_(0), stride_(0),
raw_size_(0), num_elements_(0), raw_buffer_(NULL) {}
~Buffer() { delete[] raw_buffer_; }
Buffer(int width, int height, int padding, unsigned int alignment)
: width_(width), height_(height), top_padding_(padding),
left_padding_(padding), right_padding_(padding),
bottom_padding_(padding), alignment_(alignment), padding_value_(0),
stride_(0), raw_size_(0), num_elements_(0), raw_buffer_(NULL) {}
~Buffer() {
if (alignment_) {
vpx_free(raw_buffer_);
} else {
delete[] raw_buffer_;
}
}
T *TopLeftPixel() const;
@ -82,8 +103,20 @@ class Buffer {
EXPECT_GE(bottom_padding_, 0);
stride_ = left_padding_ + width_ + right_padding_;
num_elements_ = stride_ * (top_padding_ + height_ + bottom_padding_);
raw_buffer_ = new (std::nothrow) T[num_elements_];
raw_size_ = num_elements_ * sizeof(T);
if (alignment_) {
EXPECT_GE(alignment_, sizeof(T));
// Ensure alignment of the first value will be preserved.
EXPECT_EQ((left_padding_ * sizeof(T)) % alignment_, 0u);
// Ensure alignment of the subsequent rows will be preserved when there is
// a stride.
if (stride_ != width_) {
EXPECT_EQ((stride_ * sizeof(T)) % alignment_, 0u);
}
raw_buffer_ = reinterpret_cast<T *>(vpx_memalign(alignment_, raw_size_));
} else {
raw_buffer_ = new (std::nothrow) T[num_elements_];
}
EXPECT_TRUE(raw_buffer_ != NULL);
SetPadding(std::numeric_limits<T>::max());
return !::testing::Test::HasFailure();
@ -98,6 +131,7 @@ class Buffer {
const int left_padding_;
const int right_padding_;
const int bottom_padding_;
const unsigned int alignment_;
T padding_value_;
int stride_;
int raw_size_;

82
test/comp_avg_pred_test.cc
View File

@ -15,7 +15,6 @@
#include "test/acm_random.h"
#include "test/buffer.h"
#include "test/register_state_check.h"
#include "vpx_ports/mem.h"
#include "vpx_ports/vpx_timer.h"
namespace {
@ -28,12 +27,13 @@ typedef void (*AvgPredFunc)(uint8_t *a, const uint8_t *b, int w, int h,
uint8_t avg_with_rounding(uint8_t a, uint8_t b) { return (a + b + 1) >> 1; }
void reference_pred(const uint8_t *pred, const Buffer<uint8_t> &ref, int width,
int height, uint8_t *avg) {
void reference_pred(const Buffer<uint8_t> &pred, const Buffer<uint8_t> &ref,
int width, int height, Buffer<uint8_t> *avg) {
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x) {
avg[y * width + x] = avg_with_rounding(
pred[y * width + x], ref.TopLeftPixel()[y * ref.stride() + x]);
avg->TopLeftPixel()[y * avg->stride() + x] =
avg_with_rounding(pred.TopLeftPixel()[y * pred.stride() + x],
ref.TopLeftPixel()[y * ref.stride() + x]);
}
}
}
@ -50,22 +50,10 @@ class AvgPredTest : public ::testing::TestWithParam<AvgPredFunc> {
ACMRandom rnd_;
};
void fill(ACMRandom *r, uint8_t *a, const int width, const int height) {
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x) {
a[x + width * y] = r->Rand8();
}
}
}
TEST_P(AvgPredTest, SizeCombinations) {
// This is called as part of the sub pixel variance. As such it must be one of
// the variance block sizes.
DECLARE_ALIGNED(16, uint8_t, pred[64 * 64]);
DECLARE_ALIGNED(16, uint8_t, avg_ref[64 * 64]);
DECLARE_ALIGNED(16, uint8_t, avg_chk[64 * 64]);
for (int width_pow = 2; width_pow <= 6; ++width_pow) {
for (int height_pow = width_pow - 1; height_pow <= width_pow + 1;
++height_pow) {
@ -81,15 +69,27 @@ TEST_P(AvgPredTest, SizeCombinations) {
Buffer<uint8_t> ref =
Buffer<uint8_t>(width, height, ref_padding ? 8 : 0);
ASSERT_TRUE(ref.Init());
Buffer<uint8_t> pred = Buffer<uint8_t>(width, height, 0, 16);
ASSERT_TRUE(pred.Init());
Buffer<uint8_t> avg_ref = Buffer<uint8_t>(width, height, 0, 16);
ASSERT_TRUE(avg_ref.Init());
Buffer<uint8_t> avg_chk = Buffer<uint8_t>(width, height, 0, 16);
ASSERT_TRUE(avg_chk.Init());
fill(&rnd_, pred, width, height);
ref.Set(&rnd_, &ACMRandom::Rand8);
pred.Set(&rnd_, &ACMRandom::Rand8);
reference_pred(pred, ref, width, height, avg_ref);
ASM_REGISTER_STATE_CHECK(avg_pred_func_(
avg_chk, pred, width, height, ref.TopLeftPixel(), ref.stride()));
ASSERT_EQ(memcmp(avg_ref, avg_chk, sizeof(*avg_ref) * width * height),
0);
reference_pred(pred, ref, width, height, &avg_ref);
ASM_REGISTER_STATE_CHECK(
avg_pred_func_(avg_chk.TopLeftPixel(), pred.TopLeftPixel(), width,
height, ref.TopLeftPixel(), ref.stride()));
EXPECT_TRUE(avg_chk.CheckValues(avg_ref));
if (HasFailure()) {
printf("Width: %d Height: %d\n", width, height);
avg_chk.PrintDifference(avg_ref);
return;
}
}
}
}
@ -100,25 +100,31 @@ TEST_P(AvgPredTest, CompareReferenceRandom) {
const int height = 32;
Buffer<uint8_t> ref = Buffer<uint8_t>(width, height, 8);
ASSERT_TRUE(ref.Init());
DECLARE_ALIGNED(16, uint8_t, pred[width * height]);
DECLARE_ALIGNED(16, uint8_t, avg_ref[width * height]);
DECLARE_ALIGNED(16, uint8_t, avg_chk[width * height]);
Buffer<uint8_t> pred = Buffer<uint8_t>(width, height, 0, 16);
ASSERT_TRUE(pred.Init());
Buffer<uint8_t> avg_ref = Buffer<uint8_t>(width, height, 0, 16);
ASSERT_TRUE(avg_ref.Init());
Buffer<uint8_t> avg_chk = Buffer<uint8_t>(width, height, 0, 16);
ASSERT_TRUE(avg_chk.Init());
for (int i = 0; i < 500; ++i) {
fill(&rnd_, pred, width, height);
ref.Set(&rnd_, &ACMRandom::Rand8);
pred.Set(&rnd_, &ACMRandom::Rand8);
reference_pred(pred, ref, width, height, avg_ref);
ASM_REGISTER_STATE_CHECK(avg_pred_func_(avg_chk, pred, width, height,
reference_pred(pred, ref, width, height, &avg_ref);
ASM_REGISTER_STATE_CHECK(avg_pred_func_(avg_chk.TopLeftPixel(),
pred.TopLeftPixel(), width, height,
ref.TopLeftPixel(), ref.stride()));
ASSERT_EQ(memcmp(avg_ref, avg_chk, sizeof(*avg_ref) * width * height), 0);
EXPECT_TRUE(avg_chk.CheckValues(avg_ref));
if (HasFailure()) {
printf("Width: %d Height: %d\n", width, height);
avg_chk.PrintDifference(avg_ref);
return;
}
}
}
TEST_P(AvgPredTest, DISABLED_Speed) {
DECLARE_ALIGNED(16, uint8_t, pred[64 * 64]);
DECLARE_ALIGNED(16, uint8_t, avg[64 * 64]);
for (int width_pow = 2; width_pow <= 6; ++width_pow) {
for (int height_pow = width_pow - 1; height_pow <= width_pow + 1;
++height_pow) {
@ -131,15 +137,19 @@ TEST_P(AvgPredTest, DISABLED_Speed) {
Buffer<uint8_t> ref =
Buffer<uint8_t>(width, height, ref_padding ? 8 : 0);
ASSERT_TRUE(ref.Init());
Buffer<uint8_t> pred = Buffer<uint8_t>(width, height, 0, 16);
ASSERT_TRUE(pred.Init());
Buffer<uint8_t> avg = Buffer<uint8_t>(width, height, 0, 16);
ASSERT_TRUE(avg.Init());
fill(&rnd_, pred, width, height);
ref.Set(&rnd_, &ACMRandom::Rand8);
pred.Set(&rnd_, &ACMRandom::Rand8);
vpx_usec_timer timer;
vpx_usec_timer_start(&timer);
for (int i = 0; i < 10000000 / (width * height); ++i) {
avg_pred_func_(avg, pred, width, height, ref.TopLeftPixel(),
ref.stride());
avg_pred_func_(avg.TopLeftPixel(), pred.TopLeftPixel(), width, height,
ref.TopLeftPixel(), ref.stride());
}
vpx_usec_timer_mark(&timer);