text: /*
   * Copyright (c) 2016, Alliance for Open Media. All rights reserved
   *
   * This source code is subject to the terms of the BSD 2 Clause License and
   * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
   * was not distributed with this source code in the LICENSE file, you can
   * obtain it at www.aomedia.org/license/software. If the Alliance for Open
   * Media Patent License 1.0 was not distributed with this source code in the
   * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
   */
  
  #include <string>
  
  #include "third_party/googletest/src/googletest/include/gtest/gtest.h"
  
  #include "config/aom_config.h"
  #include "config/aom_dsp_rtcd.h"
  
  #include "test/acm_random.h"
  #include "test/clear_system_state.h"
  #include "test/register_state_check.h"
  #include "test/util.h"
  #include "av1/common/blockd.h"
  #include "av1/common/common.h"
  #include "av1/common/pred_common.h"
  #include "aom_mem/aom_mem.h"
  
  namespace {
  
  using libaom_test::ACMRandom;
  
  const int count_test_block = 100000;
  
  typedef void (*HighbdIntraPred)(uint16_t *dst, ptrdiff_t stride,
                                  const uint16_t *above, const uint16_t *left,
                                  int bps);
  typedef void (*IntraPred)(uint8_t *dst, ptrdiff_t stride, const uint8_t *above,
                            const uint8_t *left);
  
  template <typename FuncType>
  struct IntraPredFunc {
    IntraPredFunc(FuncType pred = NULL, FuncType ref = NULL,
                  int block_width_value = 0, int block_height_value = 0,
                  int bit_depth_value = 0)
        : pred_fn(pred), ref_fn(ref), block_width(block_width_value),
          block_height(block_height_value), bit_depth(bit_depth_value) {}
  
    FuncType pred_fn;
    FuncType ref_fn;
    int block_width;
    int block_height;
    int bit_depth;
  };
  
  template <typename FuncType, typename Pixel>
  class AV1IntraPredTest
      : public ::testing::TestWithParam<IntraPredFunc<FuncType> > {
   public:
    void RunTest(Pixel *left_col, Pixel *above_data, Pixel *dst, Pixel *ref_dst) {
      ACMRandom rnd(ACMRandom::DeterministicSeed());
      const int block_width = params_.block_width;
      const int block_height = params_.block_height;
      above_row_ = above_data + 16;
      left_col_ = left_col;
      dst_ = dst;
      ref_dst_ = ref_dst;
      int error_count = 0;
      for (int i = 0; i < count_test_block; ++i) {
        // Fill edges with random data, try first with saturated values.
        for (int x = -1; x <= block_width * 2; x++) {
          if (i == 0) {
            above_row_[x] = mask_;
          } else {
            above_row_[x] = rnd.Rand16() & mask_;
          }
        }
        for (int y = 0; y < block_height; y++) {
          if (i == 0) {
            left_col_[y] = mask_;
          } else {
            left_col_[y] = rnd.Rand16() & mask_;
          }
        }
        Predict();
        CheckPrediction(i, &error_count);
      }
      ASSERT_EQ(0, error_count);
    }
  
   protected:
    virtual void SetUp() {
      params_ = this->GetParam();
      stride_ = params_.block_width * 3;
      mask_ = (1 << params_.bit_depth) - 1;
    }
  
    virtual void Predict() = 0;
  
    void CheckPrediction(int test_case_number, int *error_count) const {
      // For each pixel ensure that the calculated value is the same as reference.
      const int block_width = params_.block_width;
      const int block_height = params_.block_height;
      for (int y = 0; y < block_height; y++) {
        for (int x = 0; x < block_width; x++) {
          *error_count += ref_dst_[x + y * stride_] != dst_[x + y * stride_];
          if (*error_count == 1) {
            ASSERT_EQ(ref_dst_[x + y * stride_], dst_[x + y * stride_])
                << " Failed on Test Case Number " << test_case_number
                << " location: x = " << x << " y = " << y;
          }
        }
      }
    }
  
    Pixel *above_row_;
    Pixel *left_col_;
    Pixel *dst_;
    Pixel *ref_dst_;
    ptrdiff_t stride_;
    int mask_;
  
    IntraPredFunc<FuncType> params_;
  };
  
  class HighbdIntraPredTest : public AV1IntraPredTest<HighbdIntraPred, uint16_t> {
   protected:
    void Predict() {
      const int bit_depth = params_.bit_depth;
      params_.ref_fn(ref_dst_, stride_, above_row_, left_col_, bit_depth);
      ASM_REGISTER_STATE_CHECK(
          params_.pred_fn(dst_, stride_, above_row_, left_col_, bit_depth));
    }
  };
  
  class LowbdIntraPredTest : public AV1IntraPredTest<IntraPred, uint8_t> {
   protected:
    void Predict() {
      params_.ref_fn(ref_dst_, stride_, above_row_, left_col_);
      ASM_REGISTER_STATE_CHECK(
          params_.pred_fn(dst_, stride_, above_row_, left_col_));
    }
  };
  
  // Suppress an unitialized warning. Once there are implementations to test then
  // this can be restored.
  TEST_P(HighbdIntraPredTest, Bitexact) {
    // max block size is 64
    DECLARE_ALIGNED(16, uint16_t, left_col[2 * 64]);
    DECLARE_ALIGNED(16, uint16_t, above_data[2 * 64 + 64]);
    DECLARE_ALIGNED(16, uint16_t, dst[3 * 64 * 64]);
    DECLARE_ALIGNED(16, uint16_t, ref_dst[3 * 64 * 64]);
    av1_zero(left_col);
    av1_zero(above_data);
    RunTest(left_col, above_data, dst, ref_dst);
  }
  
  // Same issue as above but for arm.
  #if !HAVE_NEON
  TEST_P(LowbdIntraPredTest, Bitexact) {
    // max block size is 32
    DECLARE_ALIGNED(16, uint8_t, left_col[2 * 32]);
    DECLARE_ALIGNED(16, uint8_t, above_data[2 * 32 + 32]);
    DECLARE_ALIGNED(16, uint8_t, dst[3 * 32 * 32]);
    DECLARE_ALIGNED(16, uint8_t, ref_dst[3 * 32 * 32]);
    av1_zero(left_col);
    av1_zero(above_data);
    RunTest(left_col, above_data, dst, ref_dst);
  }
  #endif  // !HAVE_NEON
  
  // -----------------------------------------------------------------------------
  // High Bit Depth Tests
  #define highbd_entry(type, width, height, opt, bd)                          \
    IntraPredFunc<HighbdIntraPred>(                                           \
        &aom_highbd_##type##_predictor_##width##x##height##_##opt,            \
        &aom_highbd_##type##_predictor_##width##x##height##_c, width, height, \
        bd)
  
  #if 0
  #define highbd_intrapred(type, opt, bd)                                       \
    highbd_entry(type, 4, 4, opt, bd), highbd_entry(type, 4, 8, opt, bd),       \
        highbd_entry(type, 8, 4, opt, bd), highbd_entry(type, 8, 8, opt, bd),   \
        highbd_entry(type, 8, 16, opt, bd), highbd_entry(type, 16, 8, opt, bd), \
        highbd_entry(type, 16, 16, opt, bd),                                    \
        highbd_entry(type, 16, 32, opt, bd),                                    \
        highbd_entry(type, 32, 16, opt, bd), highbd_entry(type, 32, 32, opt, bd)
  #endif
  
    // ---------------------------------------------------------------------------
    // Low Bit Depth Tests
  
  #define lowbd_entry(type, width, height, opt)                                  \
    IntraPredFunc<IntraPred>(&aom_##type##_predictor_##width##x##height##_##opt, \
                             &aom_##type##_predictor_##width##x##height##_c,     \
                             width, height, 8)
  
  #define lowbd_intrapred(type, opt)                                    \
    lowbd_entry(type, 4, 4, opt), lowbd_entry(type, 4, 8, opt),         \
        lowbd_entry(type, 8, 4, opt), lowbd_entry(type, 8, 8, opt),     \
        lowbd_entry(type, 8, 16, opt), lowbd_entry(type, 16, 8, opt),   \
        lowbd_entry(type, 16, 16, opt), lowbd_entry(type, 16, 32, opt), \
        lowbd_entry(type, 32, 16, opt), lowbd_entry(type, 32, 32, opt)
  
  #if HAVE_SSE2
  const IntraPredFunc<IntraPred> LowbdIntraPredTestVector[] = {
    lowbd_intrapred(dc, sse2),      lowbd_intrapred(dc_top, sse2),
    lowbd_intrapred(dc_left, sse2), lowbd_intrapred(dc_128, sse2),
    lowbd_intrapred(v, sse2),       lowbd_intrapred(h, sse2),
  };
  
  INSTANTIATE_TEST_CASE_P(SSE2, LowbdIntraPredTest,
                          ::testing::ValuesIn(LowbdIntraPredTestVector));
  
  #endif  // HAVE_SSE2
  
  #if HAVE_SSSE3
  const IntraPredFunc<IntraPred> LowbdIntraPredTestVectorSsse3[] = {
    lowbd_intrapred(paeth, ssse3),
    lowbd_intrapred(smooth, ssse3),
  };
  
  INSTANTIATE_TEST_CASE_P(SSSE3, LowbdIntraPredTest,
                          ::testing::ValuesIn(LowbdIntraPredTestVectorSsse3));
  
  #endif  // HAVE_SSSE3
  
  #if HAVE_AVX2
  const IntraPredFunc<IntraPred> LowbdIntraPredTestVectorAvx2[] = {
    lowbd_entry(dc, 32, 32, avx2),      lowbd_entry(dc_top, 32, 32, avx2),
    lowbd_entry(dc_left, 32, 32, avx2), lowbd_entry(dc_128, 32, 32, avx2),
    lowbd_entry(v, 32, 32, avx2),       lowbd_entry(h, 32, 32, avx2),
    lowbd_entry(dc, 32, 16, avx2),      lowbd_entry(dc_top, 32, 16, avx2),
    lowbd_entry(dc_left, 32, 16, avx2), lowbd_entry(dc_128, 32, 16, avx2),
    lowbd_entry(v, 32, 16, avx2),       lowbd_entry(paeth, 16, 8, avx2),
    lowbd_entry(paeth, 16, 16, avx2),   lowbd_entry(paeth, 16, 32, avx2),
    lowbd_entry(paeth, 32, 16, avx2),   lowbd_entry(paeth, 32, 32, avx2),
  };
  
  INSTANTIATE_TEST_CASE_P(AVX2, LowbdIntraPredTest,
                          ::testing::ValuesIn(LowbdIntraPredTestVectorAvx2));
  
  #endif  // HAVE_AVX2
  
  #if HAVE_NEON
  const IntraPredFunc<HighbdIntraPred> HighbdIntraPredTestVectorNeon[] = {
    highbd_entry(dc, 4, 4, neon, 8),   highbd_entry(dc, 8, 8, neon, 8),
    highbd_entry(dc, 16, 16, neon, 8), highbd_entry(dc, 32, 32, neon, 8),
    highbd_entry(dc, 64, 64, neon, 8),
  };
  
  INSTANTIATE_TEST_CASE_P(NEON, HighbdIntraPredTest,
                          ::testing::ValuesIn(HighbdIntraPredTestVectorNeon));
  
  #endif  // HAVE_NEON
  }  // namespace
  