ref: aa0eb67bf7c009b515ec5130cca71bf8f4a5340b
dir: /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 "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" extern "C" double vp9_get_blockiness(const unsigned char *img1, int img1_pitch, const unsigned char *img2, int img2_pitch, int width, int height); using libvpx_test::ACMRandom; namespace { class BlockinessTestBase : public ::testing::Test { public: BlockinessTestBase(int width, int height) : width_(width), height_(height) {} static void SetUpTestCase() { source_data_ = reinterpret_cast<uint8_t *>( vpx_memalign(kDataAlignment, kDataBufferSize)); reference_data_ = reinterpret_cast<uint8_t *>( vpx_memalign(kDataAlignment, kDataBufferSize)); } static void TearDownTestCase() { vpx_free(source_data_); source_data_ = NULL; vpx_free(reference_data_); reference_data_ = NULL; } 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::tr1::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_ = NULL; uint8_t *BlockinessTestBase::reference_data_ = NULL; #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::tr1::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_CASE_P(C, BlockinessVP9Test, ::testing::ValuesIn(c_vp9_tests)); #endif } // namespace