1ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang/* 2ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * Copyright (c) 2012 The WebM project authors. All Rights Reserved. 3ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * 4ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * Use of this source code is governed by a BSD-style license 5ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * that can be found in the LICENSE file in the root of the source 6ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * tree. An additional intellectual property rights grant can be found 7ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * in the file PATENTS. All contributing project authors may 8ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * be found in the AUTHORS file in the root of the source tree. 9ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang */ 10ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 11ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang#include <math.h> 12ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang#include <stdlib.h> 13ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang#include <string.h> 14ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 15ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang#include "third_party/googletest/src/include/gtest/gtest.h" 16ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 17da49e34c1fb5e99681f4ad99c21d9cfd83eddb96Vignesh Venkatasubramanian#include "./vpx_dsp_rtcd.h" 181184aebb761cbeac9124c37189a80a1a58f04b6bhkuang#include "test/acm_random.h" 19ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang#include "vpx/vpx_integer.h" 207bc9febe8749e98a3812a0dc4380ceae75c29450Johann#include "vpx_ports/msvc.h" // for round() 21ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 22ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuangusing libvpx_test::ACMRandom; 23ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 24ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuangnamespace { 25ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 26ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuangvoid reference_dct_1d(double input[8], double output[8]) { 27ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang const double kPi = 3.141592653589793238462643383279502884; 28ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang const double kInvSqrt2 = 0.707106781186547524400844362104; 29ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (int k = 0; k < 8; k++) { 30ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang output[k] = 0.0; 317bc9febe8749e98a3812a0dc4380ceae75c29450Johann for (int n = 0; n < 8; n++) { 327bc9febe8749e98a3812a0dc4380ceae75c29450Johann output[k] += input[n] * cos(kPi * (2 * n + 1) * k / 16.0); 337bc9febe8749e98a3812a0dc4380ceae75c29450Johann } 347bc9febe8749e98a3812a0dc4380ceae75c29450Johann if (k == 0) output[k] = output[k] * kInvSqrt2; 35ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang } 36ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 37ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 38ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuangvoid reference_dct_2d(int16_t input[64], double output[64]) { 39ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang // First transform columns 40ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (int i = 0; i < 8; ++i) { 41ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang double temp_in[8], temp_out[8]; 427bc9febe8749e98a3812a0dc4380ceae75c29450Johann for (int j = 0; j < 8; ++j) temp_in[j] = input[j * 8 + i]; 43ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang reference_dct_1d(temp_in, temp_out); 447bc9febe8749e98a3812a0dc4380ceae75c29450Johann for (int j = 0; j < 8; ++j) output[j * 8 + i] = temp_out[j]; 45ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang } 46ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang // Then transform rows 47ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (int i = 0; i < 8; ++i) { 48ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang double temp_in[8], temp_out[8]; 497bc9febe8749e98a3812a0dc4380ceae75c29450Johann for (int j = 0; j < 8; ++j) temp_in[j] = output[j + i * 8]; 50ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang reference_dct_1d(temp_in, temp_out); 517bc9febe8749e98a3812a0dc4380ceae75c29450Johann for (int j = 0; j < 8; ++j) output[j + i * 8] = temp_out[j]; 52ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang } 53ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang // Scale by some magic number 547bc9febe8749e98a3812a0dc4380ceae75c29450Johann for (int i = 0; i < 64; ++i) output[i] *= 2; 55ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 56ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 57ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuangTEST(VP9Idct8x8Test, AccuracyCheck) { 58ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang ACMRandom rnd(ACMRandom::DeterministicSeed()); 59ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang const int count_test_block = 10000; 60ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (int i = 0; i < count_test_block; ++i) { 61da49e34c1fb5e99681f4ad99c21d9cfd83eddb96Vignesh Venkatasubramanian int16_t input[64]; 62da49e34c1fb5e99681f4ad99c21d9cfd83eddb96Vignesh Venkatasubramanian tran_low_t coeff[64]; 63ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang double output_r[64]; 64ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang uint8_t dst[64], src[64]; 65ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 66ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (int j = 0; j < 64; ++j) { 67ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang src[j] = rnd.Rand8(); 68ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang dst[j] = rnd.Rand8(); 69ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang } 70ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang // Initialize a test block with input range [-255, 255]. 717bc9febe8749e98a3812a0dc4380ceae75c29450Johann for (int j = 0; j < 64; ++j) input[j] = src[j] - dst[j]; 72ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 73ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang reference_dct_2d(input, output_r); 747bc9febe8749e98a3812a0dc4380ceae75c29450Johann for (int j = 0; j < 64; ++j) { 757bc9febe8749e98a3812a0dc4380ceae75c29450Johann coeff[j] = static_cast<tran_low_t>(round(output_r[j])); 767bc9febe8749e98a3812a0dc4380ceae75c29450Johann } 77da49e34c1fb5e99681f4ad99c21d9cfd83eddb96Vignesh Venkatasubramanian vpx_idct8x8_64_add_c(coeff, dst, 8); 78ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (int j = 0; j < 64; ++j) { 79ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang const int diff = dst[j] - src[j]; 80ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang const int error = diff * diff; 817bc9febe8749e98a3812a0dc4380ceae75c29450Johann EXPECT_GE(1, error) << "Error: 8x8 FDCT/IDCT has error " << error 827bc9febe8749e98a3812a0dc4380ceae75c29450Johann << " at index " << j; 83ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang } 84ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang } 85ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 86ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 87ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} // namespace 88