test/av1_fwd_txfm1d_test.cc

   1 /*
   2  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
   3  *
   4  * This source code is subject to the terms of the BSD 2 Clause License and
   5  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
   6  * was not distributed with this source code in the LICENSE file, you can
   7  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
   8  * Media Patent License 1.0 was not distributed with this source code in the
   9  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  10  */
  11
  12 #include "av1/encoder/av1_fwd_txfm1d.h"
  13 #include "test/av1_txfm_test.h"
  14
  15 using libaom_test::ACMRandom;
  16 using libaom_test::TYPE_ADST;
  17 using libaom_test::TYPE_DCT;
  18 using libaom_test::TYPE_IDTX;
  19 using libaom_test::TYPE_TXFM;
  20 using libaom_test::input_base;
  21 using libaom_test::reference_hybrid_1d;
  22
  23 namespace {
  24 const int txfm_type_num = 3;
  25 const TYPE_TXFM txfm_type_ls[txfm_type_num] = { TYPE_DCT, TYPE_ADST,
  26                                                 TYPE_IDTX };
  27
  28 const int txfm_size_num = 5;
  29
  30 const int txfm_size_ls[] = { 4, 8, 16, 32, 64 };
  31
  32 const TxfmFunc fwd_txfm_func_ls[][txfm_type_num] = {
  33   { av1_fdct4_new, av1_fadst4_new, av1_fidentity4_c },
  34   { av1_fdct8_new, av1_fadst8_new, av1_fidentity8_c },
  35   { av1_fdct16_new, av1_fadst16_new, av1_fidentity16_c },
  36   { av1_fdct32_new, av1_fadst32_new, av1_fidentity32_c },
  37   { av1_fdct64_new, NULL, NULL },
  38 };
  39
  40 // the maximum stage number of fwd/inv 1d dct/adst txfm is 12
  41 const int8_t cos_bit = 14;
  42 const int8_t range_bit[12] = { 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20 };
  43
  44 TEST(av1_fwd_txfm1d, round_shift) {
  45   EXPECT_EQ(round_shift(7, 1), 4);
  46   EXPECT_EQ(round_shift(-7, 1), -3);
  47
  48   EXPECT_EQ(round_shift(7, 2), 2);
  49   EXPECT_EQ(round_shift(-7, 2), -2);
  50
  51   EXPECT_EQ(round_shift(8, 2), 2);
  52   EXPECT_EQ(round_shift(-8, 2), -2);
  53 }
  54
  55 TEST(av1_fwd_txfm1d, av1_cospi_arr_data) {
  56   for (int i = 0; i < 7; i++) {
  57     for (int j = 0; j < 64; j++) {
  58       EXPECT_EQ(av1_cospi_arr_data[i][j],
  59                 (int32_t)round(cos(M_PI * j / 128) * (1 << (cos_bit_min + i))));
  60     }
  61   }
  62 }
  63
  64 TEST(av1_fwd_txfm1d, accuracy) {
  65   ACMRandom rnd(ACMRandom::DeterministicSeed());
  66   for (int si = 0; si < txfm_size_num; ++si) {
  67     int txfm_size = txfm_size_ls[si];
  68     int32_t *input = new int32_t[txfm_size];
  69     int32_t *output = new int32_t[txfm_size];
  70     double *ref_input = new double[txfm_size];
  71     double *ref_output = new double[txfm_size];
  72
  73     for (int ti = 0; ti < txfm_type_num; ++ti) {
  74       TYPE_TXFM txfm_type = txfm_type_ls[ti];
  75       TxfmFunc fwd_txfm_func = fwd_txfm_func_ls[si][ti];
  76       int max_error = 7;
  77
  78       const int count_test_block = 5000;
  79       if (fwd_txfm_func != NULL) {
  80         for (int ti = 0; ti < count_test_block; ++ti) {
  81           for (int ni = 0; ni < txfm_size; ++ni) {
  82             input[ni] = rnd.Rand16() % input_base - rnd.Rand16() % input_base;
  83             ref_input[ni] = static_cast<double>(input[ni]);
  84           }
  85
  86           fwd_txfm_func(input, output, cos_bit, range_bit);
  87           reference_hybrid_1d(ref_input, ref_output, txfm_size, txfm_type);
  88
  89           for (int ni = 0; ni < txfm_size; ++ni) {
  90             ASSERT_LE(
  91                 abs(output[ni] - static_cast<int32_t>(round(ref_output[ni]))),
  92                 max_error)
  93                 << "tx size = " << txfm_size << ", tx type = " << txfm_type;
  94           }
  95         }
  96       }
  97     }
  98
  99     delete[] input;
 100     delete[] output;
 101     delete[] ref_input;
 102     delete[] ref_output;
 103   }
 104 }
 105 }  // namespace