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/*
* 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 <math.h>
#include <stdlib.h>
#include <new>
#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
#include "test/acm_random.h"
#include "test/util.h"
#include "./aom_config.h"
#include "aom_ports/msvc.h"
#undef CONFIG_COEFFICIENT_RANGE_CHECKING
#define CONFIG_COEFFICIENT_RANGE_CHECKING 1
#define AV1_DCT_GTEST
#include "av1/encoder/dct.c"
using libaom_test::ACMRandom;
namespace {
void reference_dct_1d(const double *in, double *out, int size) {
const double kInvSqrt2 = 0.707106781186547524400844362104;
for (int k = 0; k < size; ++k) {
out[k] = 0;
for (int n = 0; n < size; ++n) {
out[k] += in[n] * cos(PI * (2 * n + 1) * k / (2 * size));
}
if (k == 0) out[k] = out[k] * kInvSqrt2;
}
}
typedef void (*FdctFuncRef)(const double *in, double *out, int size);
typedef void (*IdctFuncRef)(const double *in, double *out, int size);
typedef void (*FdctFunc)(const tran_low_t *in, tran_low_t *out);
typedef void (*IdctFunc)(const tran_low_t *in, tran_low_t *out);
class TransTestBase {
public:
virtual ~TransTestBase() {}
protected:
void RunFwdAccuracyCheck() {
tran_low_t *input = new tran_low_t[txfm_size_];
tran_low_t *output = new tran_low_t[txfm_size_];
double *ref_input = new double[txfm_size_];
double *ref_output = new double[txfm_size_];
ACMRandom rnd(ACMRandom::DeterministicSeed());
const int count_test_block = 5000;
for (int ti = 0; ti < count_test_block; ++ti) {
for (int ni = 0; ni < txfm_size_; ++ni) {
input[ni] = rnd.Rand8() - rnd.Rand8();
ref_input[ni] = static_cast<double>(input[ni]);
}
fwd_txfm_(input, output);
fwd_txfm_ref_(ref_input, ref_output, txfm_size_);
for (int ni = 0; ni < txfm_size_; ++ni) {
EXPECT_LE(
abs(output[ni] - static_cast<tran_low_t>(round(ref_output[ni]))),
max_error_);
}
}
delete[] input;
delete[] output;
delete[] ref_input;
delete[] ref_output;
}
double max_error_;
int txfm_size_;
FdctFunc fwd_txfm_;
FdctFuncRef fwd_txfm_ref_;
};
typedef std::tr1::tuple<FdctFunc, FdctFuncRef, int, int> FdctParam;
class AV1FwdTxfm : public TransTestBase,
public ::testing::TestWithParam<FdctParam> {
public:
virtual void SetUp() {
fwd_txfm_ = GET_PARAM(0);
fwd_txfm_ref_ = GET_PARAM(1);
txfm_size_ = GET_PARAM(2);
max_error_ = GET_PARAM(3);
}
virtual void TearDown() {}
};
TEST_P(AV1FwdTxfm, RunFwdAccuracyCheck) { RunFwdAccuracyCheck(); }
INSTANTIATE_TEST_CASE_P(
C, AV1FwdTxfm,
::testing::Values(FdctParam(&fdct4, &reference_dct_1d, 4, 1),
FdctParam(&fdct8, &reference_dct_1d, 8, 1),
FdctParam(&fdct16, &reference_dct_1d, 16, 2),
FdctParam(&fdct32, &reference_dct_1d, 32, 3)));
} // namespace
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