9c9d92ae3a
applied against a x86_64 configure with and without --enable-vp9-highbitdepth clang-tidy-3.7.1 \ -checks='-*,google-readability-braces-around-statements' \ -header-filter='.*' -fix + clang-format afterward Change-Id: Ia2993ec64cf1eb3505d3bfb39068d9e44cfbce8d
88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
/*
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* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include "third_party/googletest/src/include/gtest/gtest.h"
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#include "./vpx_dsp_rtcd.h"
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#include "test/acm_random.h"
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#include "vpx/vpx_integer.h"
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#include "vpx_ports/msvc.h" // for round()
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using libvpx_test::ACMRandom;
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namespace {
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void reference_dct_1d(double input[8], double output[8]) {
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const double kPi = 3.141592653589793238462643383279502884;
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const double kInvSqrt2 = 0.707106781186547524400844362104;
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for (int k = 0; k < 8; k++) {
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output[k] = 0.0;
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for (int n = 0; n < 8; n++) {
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output[k] += input[n] * cos(kPi * (2 * n + 1) * k / 16.0);
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}
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if (k == 0) output[k] = output[k] * kInvSqrt2;
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}
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}
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void reference_dct_2d(int16_t input[64], double output[64]) {
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// First transform columns
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for (int i = 0; i < 8; ++i) {
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double temp_in[8], temp_out[8];
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for (int j = 0; j < 8; ++j) temp_in[j] = input[j * 8 + i];
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reference_dct_1d(temp_in, temp_out);
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for (int j = 0; j < 8; ++j) output[j * 8 + i] = temp_out[j];
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}
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// Then transform rows
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for (int i = 0; i < 8; ++i) {
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double temp_in[8], temp_out[8];
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for (int j = 0; j < 8; ++j) temp_in[j] = output[j + i * 8];
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reference_dct_1d(temp_in, temp_out);
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for (int j = 0; j < 8; ++j) output[j + i * 8] = temp_out[j];
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}
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// Scale by some magic number
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for (int i = 0; i < 64; ++i) output[i] *= 2;
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}
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TEST(VP9Idct8x8Test, AccuracyCheck) {
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ACMRandom rnd(ACMRandom::DeterministicSeed());
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const int count_test_block = 10000;
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for (int i = 0; i < count_test_block; ++i) {
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int16_t input[64];
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tran_low_t coeff[64];
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double output_r[64];
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uint8_t dst[64], src[64];
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for (int j = 0; j < 64; ++j) {
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src[j] = rnd.Rand8();
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dst[j] = rnd.Rand8();
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}
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// Initialize a test block with input range [-255, 255].
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for (int j = 0; j < 64; ++j) input[j] = src[j] - dst[j];
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reference_dct_2d(input, output_r);
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for (int j = 0; j < 64; ++j) {
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coeff[j] = static_cast<tran_low_t>(round(output_r[j]));
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}
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vpx_idct8x8_64_add_c(coeff, dst, 8);
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for (int j = 0; j < 64; ++j) {
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const int diff = dst[j] - src[j];
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const int error = diff * diff;
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EXPECT_GE(1, error) << "Error: 8x8 FDCT/IDCT has error " << error
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<< " at index " << j;
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}
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}
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}
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} // namespace
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