/*! * \copy *     Copyright (c)  2013, Cisco Systems *     All rights reserved. * *     Redistribution and use in source and binary forms, with or without *     modification, are permitted provided that the following conditions *     are met: * *        * Redistributions of source code must retain the above copyright *          notice, this list of conditions and the following disclaimer. * *        * Redistributions in binary form must reproduce the above copyright *          notice, this list of conditions and the following disclaimer in *          the documentation and/or other materials provided with the *          distribution. * *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *     LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *     COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, *     BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER *     CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT *     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN *     ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE *     POSSIBILITY OF SUCH DAMAGE. * */ #include <string.h> #include "decode_mb_aux.h"#include "wels_common_basis.h" namespace WelsDec { //NOTE::: p_RS should NOT be modified and it will lead to mismatch with JSVM.//        so should allocate kA array to store the temporary value (idct).void IdctResAddPred_c (uint8_t* pPred, const int32_t kiStride, int16_t* pRs) {  int16_t iSrc[16];   uint8_t* pDst           = pPred;  const int32_t kiStride2 = kiStride << 1;  const int32_t kiStride3 = kiStride + kiStride2;  int32_t i;   for (i = 0; i < 4; i++) {    const int32_t kiY  = i << 2;    const int32_t kiT0 = pRs[kiY] + pRs[kiY + 2];    const int32_t kiT1 = pRs[kiY] - pRs[kiY + 2];    const int32_t kiT2 = (pRs[kiY + 1] >> 1) - pRs[kiY + 3];    const int32_t kiT3 = pRs[kiY + 1] + (pRs[kiY + 3] >> 1);     iSrc[kiY] = kiT0 + kiT3;    iSrc[kiY + 1] = kiT1 + kiT2;    iSrc[kiY + 2] = kiT1 - kiT2;    iSrc[kiY + 3] = kiT0 - kiT3;  }   for (i = 0; i < 4; i++) {    int32_t kT1 = iSrc[i]     +  iSrc[i + 8];    int32_t kT2 = iSrc[i + 4] + (iSrc[i + 12] >> 1);    int32_t kT3 = (32 + kT1 + kT2) >> 6;    int32_t kT4 = (32 + kT1 - kT2) >> 6;     pDst[i] = WelsClip1 (kT3 + pPred[i]);    pDst[i + kiStride3] = WelsClip1 (kT4 + pPred[i + kiStride3]);     kT1 = iSrc[i] - iSrc[i + 8];    kT2 = (iSrc[i + 4] >> 1) - iSrc[i + 12];    pDst[i + kiStride] = WelsClip1 (((32 + kT1 + kT2) >> 6) + pDst[i + kiStride]);    pDst[i + kiStride2] = WelsClip1 (((32 + kT1 - kT2) >> 6) + pDst[i + kiStride2]);  }} void IdctResAddPred8x8_c (uint8_t* pPred, const int32_t kiStride, int16_t* pRs) {  // To make the ASM code easy to write, should using one funciton to apply hor and ver together, such as we did on HEVC  // Ugly code, just for easy debug, the final version need optimization  int16_t p[8], b[8];  int16_t a[4];   int16_t iTmp[64];  int16_t iRes[64];   // Horizontal  for (int i = 0; i < 8; i++) {    for (int j = 0; j < 8; j++) {      p[j] = pRs[j + (i << 3)];    }    a[0] = p[0] + p[4];    a[1] = p[0] - p[4];    a[2] = p[6] - (p[2] >> 1);    a[3] = p[2] + (p[6] >> 1);     b[0] =  a[0] + a[3];    b[2] =  a[1] - a[2];    b[4] =  a[1] + a[2];    b[6] =  a[0] - a[3];     a[0] = -p[3] + p[5] - p[7] - (p[7] >> 1);    a[1] =  p[1] + p[7] - p[3] - (p[3] >> 1);    a[2] = -p[1] + p[7] + p[5] + (p[5] >> 1);    a[3] =  p[3] + p[5] + p[1] + (p[1] >> 1);     b[1] =  a[0] + (a[3] >> 2);    b[3] =  a[1] + (a[2] >> 2);    b[5] =  a[2] - (a[1] >> 2);    b[7] =  a[3] - (a[0] >> 2);     iTmp[0 + (i << 3)] = b[0] + b[7];    iTmp[1 + (i << 3)] = b[2] - b[5];    iTmp[2 + (i << 3)] = b[4] + b[3];    iTmp[3 + (i << 3)] = b[6] + b[1];    iTmp[4 + (i << 3)] = b[6] - b[1];    iTmp[5 + (i << 3)] = b[4] - b[3];    iTmp[6 + (i << 3)] = b[2] + b[5];    iTmp[7 + (i << 3)] = b[0] - b[7];  }   //Vertical  for (int i = 0; i < 8; i++) {    for (int j = 0; j < 8; j++) {      p[j] = iTmp[i + (j << 3)];    }     a[0] =  p[0] + p[4];    a[1] =  p[0] - p[4];    a[2] =  p[6] - (p[2] >> 1);    a[3] =  p[2] + (p[6] >> 1);     b[0] = a[0] + a[3];    b[2] = a[1] - a[2];    b[4] = a[1] + a[2];    b[6] = a[0] - a[3];     a[0] = -p[3] + p[5] - p[7] - (p[7] >> 1);    a[1] =  p[1] + p[7] - p[3] - (p[3] >> 1);    a[2] = -p[1] + p[7] + p[5] + (p[5] >> 1);    a[3] =  p[3] + p[5] + p[1] + (p[1] >> 1);      b[1] =  a[0] + (a[3] >> 2);    b[7] =  a[3] - (a[0] >> 2);    b[3] =  a[1] + (a[2] >> 2);    b[5] =  a[2] - (a[1] >> 2);     iRes[ (0 << 3) + i] = b[0] + b[7];    iRes[ (1 << 3) + i] = b[2] - b[5];    iRes[ (2 << 3) + i] = b[4] + b[3];    iRes[ (3 << 3) + i] = b[6] + b[1];    iRes[ (4 << 3) + i] = b[6] - b[1];    iRes[ (5 << 3) + i] = b[4] - b[3];    iRes[ (6 << 3) + i] = b[2] + b[5];    iRes[ (7 << 3) + i] = b[0] - b[7];  }   uint8_t* pDst = pPred;  for (int i = 0; i < 8; i++) {    for (int j = 0; j < 8; j++) {      pDst[i * kiStride + j] = WelsClip1 (((32 + iRes[ (i << 3) + j]) >> 6) + pDst[i * kiStride + j]);    }  } } void GetI4LumaIChromaAddrTable (int32_t* pBlockOffset, const int32_t kiYStride, const int32_t kiUVStride) {  int32_t* pOffset = pBlockOffset;  int32_t i;  const uint8_t kuiScan0 = g_kuiScan8[0];   for (i = 0; i < 16; i++) {    const uint32_t kuiA = g_kuiScan8[i] - kuiScan0;    const uint32_t kuiX = kuiA & 0x07;    const uint32_t kuiY = kuiA >> 3;     pOffset[i] = (kuiX + kiYStride * kuiY) << 2;  }   for (i = 0; i < 4; i++) {    const uint32_t kuiA = g_kuiScan8[i] - kuiScan0;     pOffset[16 + i] =      pOffset[20 + i] = ((kuiA & 0x07) + (kiUVStride/*>>1*/) * (kuiA >> 3)) << 2;  }} } // namespace WelsDec