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      1 /*
      2  *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #include <math.h>
     12 #include <stdlib.h>
     13 #include <string.h>
     14 
     15 #include "third_party/googletest/src/include/gtest/gtest.h"
     16 #include "test/acm_random.h"
     17 #include "test/clear_system_state.h"
     18 #include "test/register_state_check.h"
     19 #include "test/util.h"
     20 
     21 #include "vp8/encoder/denoising.h"
     22 #include "vp8/common/reconinter.h"
     23 #include "vpx/vpx_integer.h"
     24 #include "vpx_mem/vpx_mem.h"
     25 
     26 using libvpx_test::ACMRandom;
     27 
     28 namespace {
     29 
     30 const int kNumPixels = 16 * 16;
     31 class VP8DenoiserTest : public ::testing::TestWithParam<int> {
     32  public:
     33   virtual ~VP8DenoiserTest() {}
     34 
     35   virtual void SetUp() { increase_denoising_ = GetParam(); }
     36 
     37   virtual void TearDown() { libvpx_test::ClearSystemState(); }
     38 
     39  protected:
     40   int increase_denoising_;
     41 };
     42 
     43 TEST_P(VP8DenoiserTest, BitexactCheck) {
     44   ACMRandom rnd(ACMRandom::DeterministicSeed());
     45   const int count_test_block = 4000;
     46   const int stride = 16;
     47 
     48   // Allocate the space for input and output,
     49   // where sig_block_c/_sse2 is the block to be denoised,
     50   // mc_avg_block is the denoised reference block,
     51   // avg_block_c is the denoised result from C code,
     52   // avg_block_sse2 is the denoised result from SSE2 code.
     53   DECLARE_ALIGNED(16, uint8_t, sig_block_c[kNumPixels]);
     54   // Since in VP8 denoiser, the source signal will be changed,
     55   // we need another copy of the source signal as the input of sse2 code.
     56   DECLARE_ALIGNED(16, uint8_t, sig_block_sse2[kNumPixels]);
     57   DECLARE_ALIGNED(16, uint8_t, mc_avg_block[kNumPixels]);
     58   DECLARE_ALIGNED(16, uint8_t, avg_block_c[kNumPixels]);
     59   DECLARE_ALIGNED(16, uint8_t, avg_block_sse2[kNumPixels]);
     60 
     61   for (int i = 0; i < count_test_block; ++i) {
     62     // Generate random motion magnitude, 20% of which exceed the threshold.
     63     const int motion_magnitude_ran =
     64         rnd.Rand8() % static_cast<int>(MOTION_MAGNITUDE_THRESHOLD * 1.2);
     65 
     66     // Initialize a test block with random number in range [0, 255].
     67     for (int j = 0; j < kNumPixels; ++j) {
     68       int temp = 0;
     69       sig_block_sse2[j] = sig_block_c[j] = rnd.Rand8();
     70       // The pixels in mc_avg_block are generated by adding a random
     71       // number in range [-19, 19] to corresponding pixels in sig_block.
     72       temp =
     73           sig_block_c[j] + (rnd.Rand8() % 2 == 0 ? -1 : 1) * (rnd.Rand8() % 20);
     74       // Clip.
     75       mc_avg_block[j] = (temp < 0) ? 0 : ((temp > 255) ? 255 : temp);
     76     }
     77 
     78     // Test denosiser on Y component.
     79     ASM_REGISTER_STATE_CHECK(vp8_denoiser_filter_c(
     80         mc_avg_block, stride, avg_block_c, stride, sig_block_c, stride,
     81         motion_magnitude_ran, increase_denoising_));
     82 
     83     ASM_REGISTER_STATE_CHECK(vp8_denoiser_filter_sse2(
     84         mc_avg_block, stride, avg_block_sse2, stride, sig_block_sse2, stride,
     85         motion_magnitude_ran, increase_denoising_));
     86 
     87     // Check bitexactness.
     88     for (int h = 0; h < 16; ++h) {
     89       for (int w = 0; w < 16; ++w) {
     90         EXPECT_EQ(avg_block_c[h * stride + w], avg_block_sse2[h * stride + w]);
     91       }
     92     }
     93 
     94     // Test denoiser on UV component.
     95     ASM_REGISTER_STATE_CHECK(vp8_denoiser_filter_uv_c(
     96         mc_avg_block, stride, avg_block_c, stride, sig_block_c, stride,
     97         motion_magnitude_ran, increase_denoising_));
     98 
     99     ASM_REGISTER_STATE_CHECK(vp8_denoiser_filter_uv_sse2(
    100         mc_avg_block, stride, avg_block_sse2, stride, sig_block_sse2, stride,
    101         motion_magnitude_ran, increase_denoising_));
    102 
    103     // Check bitexactness.
    104     for (int h = 0; h < 16; ++h) {
    105       for (int w = 0; w < 16; ++w) {
    106         EXPECT_EQ(avg_block_c[h * stride + w], avg_block_sse2[h * stride + w]);
    107       }
    108     }
    109   }
    110 }
    111 
    112 // Test for all block size.
    113 INSTANTIATE_TEST_CASE_P(SSE2, VP8DenoiserTest, ::testing::Values(0, 1));
    114 }  // namespace
    115