Index: source/libvpx/test/blockiness_test.cc |
diff --git a/source/libvpx/test/blockiness_test.cc b/source/libvpx/test/blockiness_test.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..92cce6a8571d970cb05987684fd468b64a81b07c |
--- /dev/null |
+++ b/source/libvpx/test/blockiness_test.cc |
@@ -0,0 +1,229 @@ |
+/* |
+ * 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 <string.h> |
+#include <limits.h> |
+#include <stdio.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 "third_party/googletest/src/include/gtest/gtest.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: |
+ int CheckBlockiness() { |
+ 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); |
+ int super_blocky = CheckBlockiness(); |
+ |
+ EXPECT_EQ(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_); |
+ int super_blocky = CheckBlockiness(); |
+ |
+ 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_); |
+ int super_blocky = CheckBlockiness(); |
+ |
+ Blur(reference_data_, reference_stride_, 4); |
+ int less_blocky = CheckBlockiness(); |
+ |
+ 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_); |
+ |
+ int super_blocky = CheckBlockiness(); |
+ |
+ Blur(reference_data_, reference_stride_, 4); |
+ int less_blocky = CheckBlockiness(); |
+ |
+ 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 |