1233d2500723e5594f3e7c70896ffeeef32b9c950ywan/* 2233d2500723e5594f3e7c70896ffeeef32b9c950ywan * Copyright (c) 2012 The WebM project authors. All Rights Reserved. 3233d2500723e5594f3e7c70896ffeeef32b9c950ywan * 4233d2500723e5594f3e7c70896ffeeef32b9c950ywan * Use of this source code is governed by a BSD-style license 5233d2500723e5594f3e7c70896ffeeef32b9c950ywan * that can be found in the LICENSE file in the root of the source 6233d2500723e5594f3e7c70896ffeeef32b9c950ywan * tree. An additional intellectual property rights grant can be found 7233d2500723e5594f3e7c70896ffeeef32b9c950ywan * in the file PATENTS. All contributing project authors may 8233d2500723e5594f3e7c70896ffeeef32b9c950ywan * be found in the AUTHORS file in the root of the source tree. 9233d2500723e5594f3e7c70896ffeeef32b9c950ywan */ 10233d2500723e5594f3e7c70896ffeeef32b9c950ywan 11233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include <math.h> 12233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include <stdlib.h> 13233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include <string.h> 14233d2500723e5594f3e7c70896ffeeef32b9c950ywan 15233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "third_party/googletest/src/include/gtest/gtest.h" 16233d2500723e5594f3e7c70896ffeeef32b9c950ywan 17233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "./vp9_rtcd.h" 18233d2500723e5594f3e7c70896ffeeef32b9c950ywan 19233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "test/acm_random.h" 20233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "vpx/vpx_integer.h" 21233d2500723e5594f3e7c70896ffeeef32b9c950ywan 22233d2500723e5594f3e7c70896ffeeef32b9c950ywanusing libvpx_test::ACMRandom; 23233d2500723e5594f3e7c70896ffeeef32b9c950ywan 24233d2500723e5594f3e7c70896ffeeef32b9c950ywannamespace { 25233d2500723e5594f3e7c70896ffeeef32b9c950ywan 26233d2500723e5594f3e7c70896ffeeef32b9c950ywan#ifdef _MSC_VER 27233d2500723e5594f3e7c70896ffeeef32b9c950ywanstatic int round(double x) { 28233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (x < 0) 29233d2500723e5594f3e7c70896ffeeef32b9c950ywan return static_cast<int>(ceil(x - 0.5)); 30233d2500723e5594f3e7c70896ffeeef32b9c950ywan else 31233d2500723e5594f3e7c70896ffeeef32b9c950ywan return static_cast<int>(floor(x + 0.5)); 32233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 33233d2500723e5594f3e7c70896ffeeef32b9c950ywan#endif 34233d2500723e5594f3e7c70896ffeeef32b9c950ywan 35233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid reference_dct_1d(double input[8], double output[8]) { 36233d2500723e5594f3e7c70896ffeeef32b9c950ywan const double kPi = 3.141592653589793238462643383279502884; 37233d2500723e5594f3e7c70896ffeeef32b9c950ywan const double kInvSqrt2 = 0.707106781186547524400844362104; 38233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int k = 0; k < 8; k++) { 39233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[k] = 0.0; 40233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int n = 0; n < 8; n++) 41233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[k] += input[n]*cos(kPi*(2*n+1)*k/16.0); 42233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (k == 0) 43233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[k] = output[k]*kInvSqrt2; 44233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 45233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 46233d2500723e5594f3e7c70896ffeeef32b9c950ywan 47233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid reference_dct_2d(int16_t input[64], double output[64]) { 48233d2500723e5594f3e7c70896ffeeef32b9c950ywan // First transform columns 49233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int i = 0; i < 8; ++i) { 50233d2500723e5594f3e7c70896ffeeef32b9c950ywan double temp_in[8], temp_out[8]; 51233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 8; ++j) 52233d2500723e5594f3e7c70896ffeeef32b9c950ywan temp_in[j] = input[j*8 + i]; 53233d2500723e5594f3e7c70896ffeeef32b9c950ywan reference_dct_1d(temp_in, temp_out); 54233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 8; ++j) 55233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[j*8 + i] = temp_out[j]; 56233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 57233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Then transform rows 58233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int i = 0; i < 8; ++i) { 59233d2500723e5594f3e7c70896ffeeef32b9c950ywan double temp_in[8], temp_out[8]; 60233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 8; ++j) 61233d2500723e5594f3e7c70896ffeeef32b9c950ywan temp_in[j] = output[j + i*8]; 62233d2500723e5594f3e7c70896ffeeef32b9c950ywan reference_dct_1d(temp_in, temp_out); 63233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 8; ++j) 64233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[j + i*8] = temp_out[j]; 65233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 66233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Scale by some magic number 67233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int i = 0; i < 64; ++i) 68233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[i] *= 2; 69233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 70233d2500723e5594f3e7c70896ffeeef32b9c950ywan 71233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid reference_idct_1d(double input[8], double output[8]) { 72233d2500723e5594f3e7c70896ffeeef32b9c950ywan const double kPi = 3.141592653589793238462643383279502884; 73233d2500723e5594f3e7c70896ffeeef32b9c950ywan const double kSqrt2 = 1.414213562373095048801688724209698; 74233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int k = 0; k < 8; k++) { 75233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[k] = 0.0; 76233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int n = 0; n < 8; n++) { 77233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[k] += input[n]*cos(kPi*(2*k+1)*n/16.0); 78233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (n == 0) 79233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[k] = output[k]/kSqrt2; 80233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 81233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 82233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 83233d2500723e5594f3e7c70896ffeeef32b9c950ywan 84233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid reference_idct_2d(double input[64], int16_t output[64]) { 85233d2500723e5594f3e7c70896ffeeef32b9c950ywan double out[64], out2[64]; 86233d2500723e5594f3e7c70896ffeeef32b9c950ywan // First transform rows 87233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int i = 0; i < 8; ++i) { 88233d2500723e5594f3e7c70896ffeeef32b9c950ywan double temp_in[8], temp_out[8]; 89233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 8; ++j) 90233d2500723e5594f3e7c70896ffeeef32b9c950ywan temp_in[j] = input[j + i*8]; 91233d2500723e5594f3e7c70896ffeeef32b9c950ywan reference_idct_1d(temp_in, temp_out); 92233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 8; ++j) 93233d2500723e5594f3e7c70896ffeeef32b9c950ywan out[j + i*8] = temp_out[j]; 94233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 95233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Then transform columns 96233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int i = 0; i < 8; ++i) { 97233d2500723e5594f3e7c70896ffeeef32b9c950ywan double temp_in[8], temp_out[8]; 98233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 8; ++j) 99233d2500723e5594f3e7c70896ffeeef32b9c950ywan temp_in[j] = out[j*8 + i]; 100233d2500723e5594f3e7c70896ffeeef32b9c950ywan reference_idct_1d(temp_in, temp_out); 101233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 8; ++j) 102233d2500723e5594f3e7c70896ffeeef32b9c950ywan out2[j*8 + i] = temp_out[j]; 103233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 104233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int i = 0; i < 64; ++i) 105233d2500723e5594f3e7c70896ffeeef32b9c950ywan output[i] = round(out2[i]/32); 106233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 107233d2500723e5594f3e7c70896ffeeef32b9c950ywan 108233d2500723e5594f3e7c70896ffeeef32b9c950ywanTEST(VP9Idct8x8Test, AccuracyCheck) { 109233d2500723e5594f3e7c70896ffeeef32b9c950ywan ACMRandom rnd(ACMRandom::DeterministicSeed()); 110233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int count_test_block = 10000; 111233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int i = 0; i < count_test_block; ++i) { 112233d2500723e5594f3e7c70896ffeeef32b9c950ywan int16_t input[64], coeff[64]; 113233d2500723e5594f3e7c70896ffeeef32b9c950ywan double output_r[64]; 114233d2500723e5594f3e7c70896ffeeef32b9c950ywan uint8_t dst[64], src[64]; 115233d2500723e5594f3e7c70896ffeeef32b9c950ywan 116233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 64; ++j) { 117233d2500723e5594f3e7c70896ffeeef32b9c950ywan src[j] = rnd.Rand8(); 118233d2500723e5594f3e7c70896ffeeef32b9c950ywan dst[j] = rnd.Rand8(); 119233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 120233d2500723e5594f3e7c70896ffeeef32b9c950ywan // Initialize a test block with input range [-255, 255]. 121233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 64; ++j) 122233d2500723e5594f3e7c70896ffeeef32b9c950ywan input[j] = src[j] - dst[j]; 123233d2500723e5594f3e7c70896ffeeef32b9c950ywan 124233d2500723e5594f3e7c70896ffeeef32b9c950ywan reference_dct_2d(input, output_r); 125233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 64; ++j) 126233d2500723e5594f3e7c70896ffeeef32b9c950ywan coeff[j] = round(output_r[j]); 127233d2500723e5594f3e7c70896ffeeef32b9c950ywan vp9_idct8x8_64_add_c(coeff, dst, 8); 128233d2500723e5594f3e7c70896ffeeef32b9c950ywan for (int j = 0; j < 64; ++j) { 129233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int diff = dst[j] - src[j]; 130233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int error = diff * diff; 131233d2500723e5594f3e7c70896ffeeef32b9c950ywan EXPECT_GE(1, error) 132233d2500723e5594f3e7c70896ffeeef32b9c950ywan << "Error: 8x8 FDCT/IDCT has error " << error 133233d2500723e5594f3e7c70896ffeeef32b9c950ywan << " at index " << j; 134233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 135233d2500723e5594f3e7c70896ffeeef32b9c950ywan } 136233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 137233d2500723e5594f3e7c70896ffeeef32b9c950ywan 138233d2500723e5594f3e7c70896ffeeef32b9c950ywan} // namespace 139