ref: f74e0229d5575af20498a9dbf48f1d305dfc8719
dir: libvpx/test/consistency_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_dsp/ssim.h"
#include "vpx_mem/vpx_mem.h"
extern "C" double vpx_get_ssim_metrics(uint8_t *img1, int img1_pitch,
uint8_t *img2, int img2_pitch, int width,
int height, Ssimv *sv2, Metrics *m,
int do_inconsistency);
using libvpx_test::ACMRandom;
namespace {
class ConsistencyTestBase : public ::testing::Test {
public:
ConsistencyTestBase(int width, int height) : width_(width), height_(height) {}
static void SetUpTestSuite() {
source_data_[0] = reinterpret_cast<uint8_t *>(
vpx_memalign(kDataAlignment, kDataBufferSize));
reference_data_[0] = reinterpret_cast<uint8_t *>(
vpx_memalign(kDataAlignment, kDataBufferSize));
source_data_[1] = reinterpret_cast<uint8_t *>(
vpx_memalign(kDataAlignment, kDataBufferSize));
reference_data_[1] = reinterpret_cast<uint8_t *>(
vpx_memalign(kDataAlignment, kDataBufferSize));
ssim_array_ = new Ssimv[kDataBufferSize / 16];
}
static void ClearSsim() { memset(ssim_array_, 0, kDataBufferSize / 16); }
static void TearDownTestSuite() {
vpx_free(source_data_[0]);
source_data_[0] = nullptr;
vpx_free(reference_data_[0]);
reference_data_[0] = nullptr;
vpx_free(source_data_[1]);
source_data_[1] = nullptr;
vpx_free(reference_data_[1]);
reference_data_[1] = nullptr;
delete[] ssim_array_;
}
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 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 Copy(uint8_t *reference, uint8_t *source) {
memcpy(reference, source, kDataBufferSize);
}
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_[2];
int source_stride_;
static uint8_t *reference_data_[2];
int reference_stride_;
static Ssimv *ssim_array_;
Metrics metrics_;
ACMRandom rnd_;
};
#if CONFIG_VP9_ENCODER
typedef std::tuple<int, int> ConsistencyParam;
class ConsistencyVP9Test
: public ConsistencyTestBase,
public ::testing::WithParamInterface<ConsistencyParam> {
public:
ConsistencyVP9Test() : ConsistencyTestBase(GET_PARAM(0), GET_PARAM(1)) {}
protected:
double CheckConsistency(int frame) {
EXPECT_LT(frame, 2) << "Frame to check has to be less than 2.";
return vpx_get_ssim_metrics(source_data_[frame], source_stride_,
reference_data_[frame], reference_stride_,
width_, height_, ssim_array_, &metrics_, 1);
}
};
#endif // CONFIG_VP9_ENCODER
uint8_t *ConsistencyTestBase::source_data_[2] = { nullptr, nullptr };
uint8_t *ConsistencyTestBase::reference_data_[2] = { nullptr, nullptr };
Ssimv *ConsistencyTestBase::ssim_array_ = nullptr;
#if CONFIG_VP9_ENCODER
TEST_P(ConsistencyVP9Test, ConsistencyIsZero) {
FillRandom(source_data_[0], source_stride_);
Copy(source_data_[1], source_data_[0]);
Copy(reference_data_[0], source_data_[0]);
Blur(reference_data_[0], reference_stride_, 3);
Copy(reference_data_[1], source_data_[0]);
Blur(reference_data_[1], reference_stride_, 3);
double inconsistency = CheckConsistency(1);
inconsistency = CheckConsistency(0);
EXPECT_EQ(inconsistency, 0.0)
<< "Should have 0 inconsistency if they are exactly the same.";
// If sources are not consistent reference frames inconsistency should
// be less than if the source is consistent.
FillRandom(source_data_[0], source_stride_);
FillRandom(source_data_[1], source_stride_);
FillRandom(reference_data_[0], reference_stride_);
FillRandom(reference_data_[1], reference_stride_);
CheckConsistency(0);
inconsistency = CheckConsistency(1);
Copy(source_data_[1], source_data_[0]);
CheckConsistency(0);
double inconsistency2 = CheckConsistency(1);
EXPECT_LT(inconsistency, inconsistency2)
<< "Should have less inconsistency if source itself is inconsistent.";
// Less of a blur should be less inconsistent than more blur coming off a
// a frame with no blur.
ClearSsim();
FillRandom(source_data_[0], source_stride_);
Copy(source_data_[1], source_data_[0]);
Copy(reference_data_[0], source_data_[0]);
Copy(reference_data_[1], source_data_[0]);
Blur(reference_data_[1], reference_stride_, 4);
CheckConsistency(0);
inconsistency = CheckConsistency(1);
ClearSsim();
Copy(reference_data_[1], source_data_[0]);
Blur(reference_data_[1], reference_stride_, 8);
CheckConsistency(0);
inconsistency2 = CheckConsistency(1);
EXPECT_LT(inconsistency, inconsistency2)
<< "Stronger Blur should produce more inconsistency.";
}
#endif // CONFIG_VP9_ENCODER
using std::make_tuple;
//------------------------------------------------------------------------------
// C functions
#if CONFIG_VP9_ENCODER
const ConsistencyParam c_vp9_tests[] = { make_tuple(320, 240),
make_tuple(318, 242),
make_tuple(318, 238) };
INSTANTIATE_TEST_SUITE_P(C, ConsistencyVP9Test,
::testing::ValuesIn(c_vp9_tests));
#endif
} // namespace