#include <gtest/gtest.h>#include <math.h> #include "cpu_core.h"#include "cpu.h"#include "sample.h"#include "sad_common.h"#include "get_intra_predictor.h" using namespace WelsEnc; #define GENERATE_Intra16x16_UT(func, ref, ASM, CPUFLAGS) \TEST (IntraSadSatdFuncTest, func) { \  const int32_t iLineSizeDec = 32; \  const int32_t iLineSizeEnc = 32; \  int32_t tmpa, tmpb; \  int32_t iBestMode_c, iBestMode_a, iLambda = 50; \  if (ASM) {\    int32_t iCpuCores = 0; \    uint32_t m_uiCpuFeatureFlag = WelsCPUFeatureDetect (&iCpuCores); \    if (0 == (m_uiCpuFeatureFlag & CPUFLAGS)) \      return; \  } \  ENFORCE_STACK_ALIGN_1D (uint8_t, pDec, iLineSizeDec << 5, 16); \  ENFORCE_STACK_ALIGN_1D (uint8_t, pEnc, iLineSizeEnc << 5, 16); \  ENFORCE_STACK_ALIGN_1D (uint8_t, pDst, 512, 16); \  for (int i = 0; i < (iLineSizeDec << 5); i++) \    pDec[i] = rand() % 256; \  for (int i = 0; i < (iLineSizeEnc << 5); i++) \    pEnc[i] = rand() % 256; \  for (int i = 0; i < 512; i++) \    pDst[i] = rand() % 256; \  tmpa = ref (pDec + 128, iLineSizeDec, pEnc, iLineSizeEnc, &iBestMode_c, iLambda, pDst); \  tmpb = func (pDec + 128, iLineSizeDec, pEnc, iLineSizeEnc, &iBestMode_a, iLambda, pDst); \  ASSERT_EQ (tmpa, tmpb); \  ASSERT_EQ (iBestMode_c, iBestMode_a); \} #define GENERATE_Intra4x4_UT(func, ASM, CPUFLAGS) \TEST (IntraSadSatdFuncTest, func) { \  const int32_t iLineSizeDec = 32; \  const int32_t iLineSizeEnc = 32; \  int32_t tmpa, tmpb; \  int32_t iBestMode_c, iBestMode_a, iLambda = 50; \  int32_t lambda[2] = {iLambda << 2, iLambda}; \  int32_t iPredMode = rand() % 3; \  if (ASM) {\    int32_t iCpuCores = 0; \    uint32_t m_uiCpuFeatureFlag = WelsCPUFeatureDetect (&iCpuCores); \    if (0 == (m_uiCpuFeatureFlag & CPUFLAGS)) \     return; \  } \  ENFORCE_STACK_ALIGN_1D (uint8_t, pDec, iLineSizeDec << 5, 16); \  ENFORCE_STACK_ALIGN_1D (uint8_t, pEnc, iLineSizeEnc << 5, 16); \  ENFORCE_STACK_ALIGN_1D (uint8_t, pDst, 512, 16); \  for (int i = 0; i < (iLineSizeDec << 5); i++) \    pDec[i] = rand() % 256; \  for (int i = 0; i < (iLineSizeEnc << 5); i++) \    pEnc[i] = rand() % 256; \  for (int i = 0; i < 512; i++) \    pDst[i] = rand() % 256; \  tmpa = WelsSampleSatdIntra4x4Combined3_c (pDec + 128, iLineSizeDec, pEnc, iLineSizeEnc, pDst, &iBestMode_c, \         lambda[iPredMode == 2], lambda[iPredMode == 1], lambda[iPredMode == 0]); \  tmpb = func (pDec + 128, iLineSizeDec, pEnc, iLineSizeEnc, pDst, &iBestMode_a, \                                      lambda[iPredMode == 2], lambda[iPredMode == 1], lambda[iPredMode == 0]); \  ASSERT_EQ (tmpa, tmpb); \  ASSERT_EQ (iBestMode_c, iBestMode_a); \} #define GENERATE_Intra8x8_UT(func, ref, ASM, CPUFLAGS) \TEST (IntraSadSatdFuncTest, func) { \  const int32_t iLineSizeDec = 32; \  const int32_t iLineSizeEnc = 32; \  int32_t tmpa, tmpb; \  int32_t iBestMode_c, iBestMode_a, iLambda = 50; \  if (ASM) {\    int32_t iCpuCores = 0; \    uint32_t m_uiCpuFeatureFlag = WelsCPUFeatureDetect (&iCpuCores); \    if (0 == (m_uiCpuFeatureFlag & CPUFLAGS)) \        return; \  } \  ENFORCE_STACK_ALIGN_1D (uint8_t, pDecCb, iLineSizeDec << 5, 16); \  ENFORCE_STACK_ALIGN_1D (uint8_t, pEncCb, iLineSizeEnc << 5, 16); \  ENFORCE_STACK_ALIGN_1D (uint8_t, pDecCr, iLineSizeDec << 5, 16); \  ENFORCE_STACK_ALIGN_1D (uint8_t, pEncCr, iLineSizeEnc << 5, 16); \  ENFORCE_STACK_ALIGN_1D (uint8_t, pDstChma, 512, 16); \  for (int i = 0; i < (iLineSizeDec << 5); i++) { \    pDecCb[i] = rand() % 256; \    pDecCr[i] = rand() % 256; \  } \  for (int i = 0; i < (iLineSizeEnc << 5); i++) { \    pEncCb[i] = rand() % 256; \    pEncCr[i] = rand() % 256; \  } \  for (int i = 0; i < 512; i++) \    pDstChma[i] = rand() % 256; \  tmpa = ref (pDecCb + 128, iLineSizeDec, pEncCb, iLineSizeEnc, &iBestMode_c, iLambda, \         pDstChma, pDecCr + 128, pEncCr); \  tmpb = func (pDecCb + 128, iLineSizeDec, pEncCb, iLineSizeEnc, &iBestMode_a, iLambda, \         pDstChma, pDecCr + 128, pEncCr); \  ASSERT_EQ (tmpa, tmpb); \  ASSERT_EQ (iBestMode_c, iBestMode_a); \} #ifdef X86_ASMGENERATE_Intra16x16_UT (WelsIntra16x16Combined3Sad_ssse3, WelsSampleSadIntra16x16Combined3_c, 1, WELS_CPU_SSSE3)GENERATE_Intra16x16_UT (WelsIntra16x16Combined3Satd_sse41, WelsSampleSatdIntra16x16Combined3_c, 1, WELS_CPU_SSE41)GENERATE_Intra8x8_UT (WelsIntraChroma8x8Combined3Satd_sse41, WelsSampleSatdIntra8x8Combined3_c, 1, WELS_CPU_SSE41)GENERATE_Intra4x4_UT (WelsSampleSatdThree4x4_sse2, 1, WELS_CPU_SSE2)#endif #ifdef HAVE_NEONGENERATE_Intra16x16_UT (WelsIntra16x16Combined3Sad_neon, WelsSampleSadIntra16x16Combined3_c, 1, WELS_CPU_NEON)GENERATE_Intra16x16_UT (WelsIntra16x16Combined3Satd_neon, WelsSampleSatdIntra16x16Combined3_c, 1, WELS_CPU_NEON)GENERATE_Intra8x8_UT (WelsIntra8x8Combined3Satd_neon, WelsSampleSatdIntra8x8Combined3_c, 1, WELS_CPU_NEON)GENERATE_Intra8x8_UT (WelsIntra8x8Combined3Sad_neon, WelsSampleSadIntra8x8Combined3_c, 1, WELS_CPU_NEON)GENERATE_Intra4x4_UT (WelsIntra4x4Combined3Satd_neon, 1, WELS_CPU_NEON)#endif #ifdef HAVE_NEON_AARCH64GENERATE_Intra16x16_UT (WelsIntra16x16Combined3Sad_AArch64_neon, WelsSampleSadIntra16x16Combined3_c, 1, WELS_CPU_NEON)GENERATE_Intra16x16_UT (WelsIntra16x16Combined3Satd_AArch64_neon, WelsSampleSatdIntra16x16Combined3_c, 1, WELS_CPU_NEON)GENERATE_Intra8x8_UT (WelsIntra8x8Combined3Satd_AArch64_neon, WelsSampleSatdIntra8x8Combined3_c, 1, WELS_CPU_NEON)GENERATE_Intra8x8_UT (WelsIntra8x8Combined3Sad_AArch64_neon, WelsSampleSadIntra8x8Combined3_c, 1, WELS_CPU_NEON)GENERATE_Intra4x4_UT (WelsIntra4x4Combined3Satd_AArch64_neon, 1, WELS_CPU_NEON)#endif #define ASSERT_MEMORY_FAIL2X(A, B)     \  if (NULL == B) {                     \    pMemAlign->WelsFree(A, "Sad_SrcA");\    ASSERT_TRUE(0);                    \  } #define ASSERT_MEMORY_FAIL3X(A, B, C)   \  if (NULL == C) {                      \    pMemAlign->WelsFree(A, "Sad_SrcA"); \    pMemAlign->WelsFree(B, "Sad_SrcB"); \    ASSERT_TRUE(0);                     \  } #define PIXEL_STRIDE 32 class SadSatdCFuncTest : public testing::Test { public:  virtual void SetUp() {    pMemAlign = new CMemoryAlign (0);     m_iStrideA = rand() % 256 + PIXEL_STRIDE;    m_iStrideB = rand() % 256 + PIXEL_STRIDE;    m_pPixSrcA = (uint8_t*)pMemAlign->WelsMalloc (m_iStrideA << 5, "Sad_m_pPixSrcA");    ASSERT_TRUE (NULL != m_pPixSrcA);    m_pPixSrcB = (uint8_t*)pMemAlign->WelsMalloc (m_iStrideB << 5, "Sad_m_pPixSrcB");    ASSERT_MEMORY_FAIL2X (m_pPixSrcA, m_pPixSrcB)    m_pSad = (int32_t*)pMemAlign->WelsMalloc (4 * sizeof (int32_t), "m_pSad");    ASSERT_MEMORY_FAIL3X (m_pPixSrcA, m_pPixSrcB, m_pSad)  }  virtual void TearDown() {    pMemAlign->WelsFree (m_pPixSrcA, "Sad_m_pPixSrcA");    pMemAlign->WelsFree (m_pPixSrcB, "Sad_m_pPixSrcB");    pMemAlign->WelsFree (m_pSad, "m_pSad");    delete pMemAlign;  } public:  uint8_t* m_pPixSrcA;  uint8_t* m_pPixSrcB;  int32_t m_iStrideA;  int32_t m_iStrideB;  int32_t* m_pSad;   CMemoryAlign* pMemAlign;}; TEST_F (SadSatdCFuncTest, WelsSampleSad4x4_c) {  for (int i = 0; i < (m_iStrideA << 2); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 2); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB;   int32_t iSumSad = 0;  for (int i = 0; i < 4; i++) {    for (int j = 0; j < 4; j++)      iSumSad += abs (pPixA[j] - pPixB[j]);    pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  EXPECT_EQ (WelsSampleSad4x4_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB, m_iStrideB), iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSad8x4_c) {  for (int i = 0; i < (m_iStrideA << 2); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 2); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB;   int32_t iSumSad = 0;  for (int i = 0; i < 4; i++) {    for (int j = 0; j < 8; j++)      iSumSad += abs (pPixA[j] - pPixB[j]);    pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  EXPECT_EQ (WelsSampleSad8x4_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB, m_iStrideB), iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSad4x8_c) {  for (int i = 0; i < (m_iStrideA << 3); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 3); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB;   int32_t iSumSad = 0;  for (int i = 0; i < 8; i++) {    for (int j = 0; j < 4; j++)      iSumSad += abs (pPixA[j] - pPixB[j]);    pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  EXPECT_EQ (WelsSampleSad4x8_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB, m_iStrideB), iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSad8x8_c) {  for (int i = 0; i < (m_iStrideA << 3); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 3); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB;   int32_t iSumSad = 0;  for (int i = 0; i < 8; i++) {    for (int j = 0; j < 8; j++)      iSumSad += abs (pPixA[j] - pPixB[j]);     pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  EXPECT_EQ (WelsSampleSad8x8_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB, m_iStrideB), iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSad16x8_c) {  for (int i = 0; i < (m_iStrideA << 3); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 3); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB;   int32_t iSumSad = 0;  for (int i = 0; i < 8; i++) {    for (int j = 0; j < 16; j++)      iSumSad += abs (pPixA[j] - pPixB[j]);     pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  EXPECT_EQ (WelsSampleSad16x8_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB, m_iStrideB), iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSad8x16_c) {  for (int i = 0; i < (m_iStrideA << 4); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 4); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB;   int32_t iSumSad = 0;  for (int i = 0; i < 16; i++) {    for (int j = 0; j < 8; j++)      iSumSad += abs (pPixA[j] - pPixB[j]);     pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  EXPECT_EQ (WelsSampleSad8x16_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB, m_iStrideB), iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSad16x16_c) {  for (int i = 0; i < (m_iStrideA << 4); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 4); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB;   int32_t iSumSad = 0;  for (int i = 0; i < 16; i++) {    for (int j = 0; j < 16; j++)      iSumSad += abs (pPixA[j] - pPixB[j]);     pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  EXPECT_EQ (WelsSampleSad16x16_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB, m_iStrideB), iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSatd4x4_c) {  for (int i = 0; i < (m_iStrideA << 2); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 2); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB;   int32_t W[16], T[16], Y[16], k = 0;  for (int i = 0; i < 4; i++) {    for (int j = 0; j < 4; j++)      W[k++] = pPixA[j] - pPixB[j];    pPixA += m_iStrideA;    pPixB += m_iStrideB;  }   T[0] = W[0] + W[4] + W[8] + W[12];  T[1] = W[1] + W[5] + W[9] + W[13];  T[2] = W[2] + W[6] + W[10] + W[14];  T[3] = W[3] + W[7] + W[11] + W[15];   T[4] = W[0] + W[4] - W[8] - W[12];  T[5] = W[1] + W[5] - W[9] - W[13];  T[6] = W[2] + W[6] - W[10] - W[14];  T[7] = W[3] + W[7] - W[11] - W[15];   T[8] = W[0] - W[4] - W[8] + W[12];  T[9] = W[1] - W[5] - W[9] + W[13];  T[10] = W[2] - W[6] - W[10] + W[14];  T[11] = W[3] - W[7] - W[11] + W[15];   T[12] = W[0] - W[4] + W[8] - W[12];  T[13] = W[1] - W[5] + W[9] - W[13];  T[14] = W[2] - W[6] + W[10] - W[14];  T[15] = W[3] - W[7] + W[11] - W[15];   Y[0] = T[0] + T[1] + T[2] + T[3];  Y[1] = T[0] + T[1] - T[2] - T[3];  Y[2] = T[0] - T[1] - T[2] + T[3];  Y[3] = T[0] - T[1] + T[2] - T[3];   Y[4] = T[4] + T[5] + T[6] + T[7];  Y[5] = T[4] + T[5] - T[6] - T[7];  Y[6] = T[4] - T[5] - T[6] + T[7];  Y[7] = T[4] - T[5] + T[6] - T[7];   Y[8] = T[8] + T[9] + T[10] + T[11];  Y[9] = T[8] + T[9] - T[10] - T[11];  Y[10] = T[8] - T[9] - T[10] + T[11];  Y[11] = T[8] - T[9] + T[10] - T[11];   Y[12] = T[12] + T[13] + T[14] + T[15];  Y[13] = T[12] + T[13] - T[14] - T[15];  Y[14] = T[12] - T[13] - T[14] + T[15];  Y[15] = T[12] - T[13] + T[14] - T[15];   int32_t iSumSatd = 0;  for (int i = 0; i < 16; i++)    iSumSatd += abs (Y[i]);   EXPECT_EQ (WelsSampleSatd4x4_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB, m_iStrideB), (iSumSatd + 1) >> 1);} TEST_F (SadSatdCFuncTest, WelsSampleSadFour16x16_c) {  for (int i = 0; i < (m_iStrideA << 5); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 5); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB + m_iStrideB;   int32_t iSumSad = 0;  for (int i = 0; i < 16; i++) {    for (int j = 0; j < 16; j++) {      iSumSad += abs (pPixA[j] - pPixB[j - 1]);      iSumSad += abs (pPixA[j] - pPixB[j + 1]);      iSumSad += abs (pPixA[j] - pPixB[j - m_iStrideB]);      iSumSad += abs (pPixA[j] - pPixB[j + m_iStrideB]);    }    pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  WelsSampleSadFour16x16_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB + m_iStrideB, m_iStrideB, m_pSad);  EXPECT_EQ (m_pSad[0] + m_pSad[1] + m_pSad[2] + m_pSad[3], iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSadFour16x8_c) {  for (int i = 0; i < (m_iStrideA << 5); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 5); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB + m_iStrideB;   int32_t iSumSad = 0;  for (int i = 0; i < 8; i++) {    for (int j = 0; j < 16; j++) {      iSumSad += abs (pPixA[j] - pPixB[j - 1]);      iSumSad += abs (pPixA[j] - pPixB[j + 1]);      iSumSad += abs (pPixA[j] - pPixB[j - m_iStrideB]);      iSumSad += abs (pPixA[j] - pPixB[j + m_iStrideB]);    }    pPixA += m_iStrideA;    pPixB += m_iStrideB;  }   WelsSampleSadFour16x8_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB + m_iStrideB, m_iStrideB, m_pSad);  EXPECT_EQ (m_pSad[0] + m_pSad[1] + m_pSad[2] + m_pSad[3], iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSadFour8x16_c) {  for (int i = 0; i < (m_iStrideA << 5); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 5); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB + m_iStrideB;   int32_t iSumSad = 0;  for (int i = 0; i < 16; i++) {    for (int j = 0; j < 8; j++) {      iSumSad += abs (pPixA[j] - pPixB[j - 1]);      iSumSad += abs (pPixA[j] - pPixB[j + 1]);      iSumSad += abs (pPixA[j] - pPixB[j - m_iStrideB]);      iSumSad += abs (pPixA[j] - pPixB[j + m_iStrideB]);    }    pPixA += m_iStrideA;    pPixB += m_iStrideB;  }   WelsSampleSadFour8x16_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB + m_iStrideB, m_iStrideB, m_pSad);  EXPECT_EQ (m_pSad[0] + m_pSad[1] + m_pSad[2] + m_pSad[3], iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSadFour8x8_c) {  for (int i = 0; i < (m_iStrideA << 4); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 4); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB + m_iStrideB;   int32_t iSumSad = 0;  for (int i = 0; i < 8; i++) {    for (int j = 0; j < 8; j++) {      iSumSad += abs (pPixA[j] - pPixB[j - 1]);      iSumSad += abs (pPixA[j] - pPixB[j + 1]);      iSumSad += abs (pPixA[j] - pPixB[j - m_iStrideB]);      iSumSad += abs (pPixA[j] - pPixB[j + m_iStrideB]);    }    pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  WelsSampleSadFour8x8_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB + m_iStrideB, m_iStrideB, m_pSad);  EXPECT_EQ (m_pSad[0] + m_pSad[1] + m_pSad[2] + m_pSad[3], iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSadFour4x4_c) {  for (int i = 0; i < (m_iStrideA << 3); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 3); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB + m_iStrideB;   int32_t iSumSad = 0;  for (int i = 0; i < 4; i++) {    for (int j = 0; j < 4; j++) {      iSumSad += abs (pPixA[j] - pPixB[j - 1]);      iSumSad += abs (pPixA[j] - pPixB[j + 1]);      iSumSad += abs (pPixA[j] - pPixB[j - m_iStrideB]);      iSumSad += abs (pPixA[j] - pPixB[j + m_iStrideB]);    }    pPixA += m_iStrideA;    pPixB += m_iStrideB;  }  WelsSampleSadFour4x4_c (m_pPixSrcA, m_iStrideA, m_pPixSrcB + m_iStrideB, m_iStrideB, m_pSad);  EXPECT_EQ (m_pSad[0] + m_pSad[1] + m_pSad[2] + m_pSad[3], iSumSad);} TEST_F (SadSatdCFuncTest, WelsSampleSadFour8x4_c) {  for (int i = 0; i < (m_iStrideA << 3); i++)    m_pPixSrcA[i] = rand() % 256;  for (int i = 0; i < (m_iStrideB << 3); i++)    m_pPixSrcB[i] = rand() % 256;  uint8_t* pPixA = m_pPixSrcA;  uint8_t* pPixB = m_pPixSrcB + m_iStrideB;   int32_t iSumSad = 0;  for (int i = 0; i < 4; i++) {    for (int j = 0; j < 8; j++) {      iSumSad += abs (pPixA[j] - pPixB[j - 1]);      iSumSad += abs (pPixA[j] - pPixB[j + 1]);      iSumSad += abs (pPixA[j] - pPixB[j - m_iStrideB]);      iSumSad += abs (pPixA[j] - pPixB[j + m_iStrideB]);    }    pPixA += m_iStrideA;    pPixB += m_iStrideB;

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