ref: d55682c2aadbca664727fde886d42d39f7cbb5cd
dir: libvpx/test/blockiness_test.cc
/*
* Copyright (c) 2012 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 <limits.h>
#include <stdio.h>
#include <string.h>
#include <tuple>
#include "third_party/googletest/src/include/gtest/gtest.h"
#include "./vpx_config.h"
#if CONFIG_VP9_ENCODER
#include "./vp9_rtcd.h"
#endif
#include "test/acm_random.h"
#include "test/clear_system_state.h"
#include "test/register_state_check.h"
#include "test/util.h"
#include "vpx_mem/vpx_mem.h"
#include "vp9/encoder/vp9_blockiness.h"
using libvpx_test::ACMRandom;
namespace {
class BlockinessTestBase : public ::testing::Test {
public:
BlockinessTestBase(int width, int height) : width_(width), height_(height) {}
static void SetUpTestSuite() {
source_data_ = reinterpret_cast<uint8_t *>(
vpx_memalign(kDataAlignment, kDataBufferSize));
reference_data_ = reinterpret_cast<uint8_t *>(
vpx_memalign(kDataAlignment, kDataBufferSize));
}
static void TearDownTestSuite() {
vpx_free(source_data_);
source_data_ = nullptr;
vpx_free(reference_data_);
reference_data_ = nullptr;
}
virtual void TearDown() { libvpx_test::ClearSystemState(); }
protected:
// Handle frames up to 640x480
static const int kDataAlignment = 16;
static const int kDataBufferSize = 640 * 480;
virtual void SetUp() {
source_stride_ = (width_ + 31) & ~31;
reference_stride_ = width_ * 2;
rnd_.Reset(ACMRandom::DeterministicSeed());
}
void FillConstant(uint8_t *data, int stride, uint8_t fill_constant, int width,
int height) {
for (int h = 0; h < height; ++h) {
for (int w = 0; w < width; ++w) {
data[h * stride + w] = fill_constant;
}
}
}
void FillConstant(uint8_t *data, int stride, uint8_t fill_constant) {
FillConstant(data, stride, fill_constant, width_, height_);
}
void FillRandom(uint8_t *data, int stride, int width, int height) {
for (int h = 0; h < height; ++h) {
for (int w = 0; w < width; ++w) {
data[h * stride + w] = rnd_.Rand8();
}
}
}
void FillRandom(uint8_t *data, int stride) {
FillRandom(data, stride, width_, height_);
}
void FillRandomBlocky(uint8_t *data, int stride) {
for (int h = 0; h < height_; h += 4) {
for (int w = 0; w < width_; w += 4) {
FillRandom(data + h * stride + w, stride, 4, 4);
}
}
}
void FillCheckerboard(uint8_t *data, int stride) {
for (int h = 0; h < height_; h += 4) {
for (int w = 0; w < width_; w += 4) {
if (((h / 4) ^ (w / 4)) & 1) {
FillConstant(data + h * stride + w, stride, 255, 4, 4);
} else {
FillConstant(data + h * stride + w, stride, 0, 4, 4);
}
}
}
}
void Blur(uint8_t *data, int stride, int taps) {
int sum = 0;
int half_taps = taps / 2;
for (int h = 0; h < height_; ++h) {
for (int w = 0; w < taps; ++w) {
sum += data[w + h * stride];
}
for (int w = taps; w < width_; ++w) {
sum += data[w + h * stride] - data[w - taps + h * stride];
data[w - half_taps + h * stride] = (sum + half_taps) / taps;
}
}
for (int w = 0; w < width_; ++w) {
for (int h = 0; h < taps; ++h) {
sum += data[h + w * stride];
}
for (int h = taps; h < height_; ++h) {
sum += data[w + h * stride] - data[(h - taps) * stride + w];
data[(h - half_taps) * stride + w] = (sum + half_taps) / taps;
}
}
}
int width_, height_;
static uint8_t *source_data_;
int source_stride_;
static uint8_t *reference_data_;
int reference_stride_;
ACMRandom rnd_;
};
#if CONFIG_VP9_ENCODER
typedef std::tuple<int, int> BlockinessParam;
class BlockinessVP9Test
: public BlockinessTestBase,
public ::testing::WithParamInterface<BlockinessParam> {
public:
BlockinessVP9Test() : BlockinessTestBase(GET_PARAM(0), GET_PARAM(1)) {}
protected:
double GetBlockiness() const {
return vp9_get_blockiness(source_data_, source_stride_, reference_data_,
reference_stride_, width_, height_);
}
};
#endif // CONFIG_VP9_ENCODER
uint8_t *BlockinessTestBase::source_data_ = nullptr;
uint8_t *BlockinessTestBase::reference_data_ = nullptr;
#if CONFIG_VP9_ENCODER
TEST_P(BlockinessVP9Test, SourceBlockierThanReference) {
// Source is blockier than reference.
FillRandomBlocky(source_data_, source_stride_);
FillConstant(reference_data_, reference_stride_, 128);
const double super_blocky = GetBlockiness();
EXPECT_DOUBLE_EQ(0.0, super_blocky)
<< "Blocky source should produce 0 blockiness.";
}
TEST_P(BlockinessVP9Test, ReferenceBlockierThanSource) {
// Source is blockier than reference.
FillConstant(source_data_, source_stride_, 128);
FillRandomBlocky(reference_data_, reference_stride_);
const double super_blocky = GetBlockiness();
EXPECT_GT(super_blocky, 0.0)
<< "Blocky reference should score high for blockiness.";
}
TEST_P(BlockinessVP9Test, BlurringDecreasesBlockiness) {
// Source is blockier than reference.
FillConstant(source_data_, source_stride_, 128);
FillRandomBlocky(reference_data_, reference_stride_);
const double super_blocky = GetBlockiness();
Blur(reference_data_, reference_stride_, 4);
const double less_blocky = GetBlockiness();
EXPECT_GT(super_blocky, less_blocky)
<< "A straight blur should decrease blockiness.";
}
TEST_P(BlockinessVP9Test, WorstCaseBlockiness) {
// Source is blockier than reference.
FillConstant(source_data_, source_stride_, 128);
FillCheckerboard(reference_data_, reference_stride_);
const double super_blocky = GetBlockiness();
Blur(reference_data_, reference_stride_, 4);
const double less_blocky = GetBlockiness();
EXPECT_GT(super_blocky, less_blocky)
<< "A straight blur should decrease blockiness.";
}
#endif // CONFIG_VP9_ENCODER
using std::make_tuple;
//------------------------------------------------------------------------------
// C functions
#if CONFIG_VP9_ENCODER
const BlockinessParam c_vp9_tests[] = { make_tuple(320, 240),
make_tuple(318, 242),
make_tuple(318, 238) };
INSTANTIATE_TEST_SUITE_P(C, BlockinessVP9Test,
::testing::ValuesIn(c_vp9_tests));
#endif
} // namespace