/* *  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_ENCODERtypedef 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_ENCODERTEST_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_ENCODERconst 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