/*! * \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 { #define MAX_NEG_CROP 1024uint8_t g_ClipTable[256 + 2 *                    MAX_NEG_CROP];	//the front 1024 is 0, the back 1024 is 255, the middle 256 elements is 0-255  /* init pClip table to pClip the final dct data */void_t InitDctClipTable (void_t) {  uint8_t* p		        = &g_ClipTable[0];  const int32_t kiLength	= MAX_NEG_CROP * sizeof (uint8_t);  int32_t i               = 0;   do {    const int32_t kiIdx = MAX_NEG_CROP + i;     p[kiIdx]	= i;    p[1 + kiIdx]	= 1 + i;    p[2 + kiIdx]	= 2 + i;    p[3 + kiIdx]	= 3 + i;     i += 4;  } while (i < 256);   memset (p, 0, kiLength);  memset (p + MAX_NEG_CROP + 256, 0xFF, kiLength);} //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_t 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;  uint8_t* pClip			= &g_ClipTable[MAX_NEG_CROP];  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] = pClip[ kT3 + pPred[i] ];    pDst[i + kiStride3] = pClip[ kT4 + pPred[i + kiStride3] ];     kT1	= iSrc[i] - iSrc[i + 8];    kT2	= (iSrc[i + 4] >> 1) - iSrc[i + 12];    pDst[i + kiStride] = pClip[ ((32 + kT1 + kT2) >> 6) + pDst[i + kiStride] ];    pDst[i + kiStride2] = pClip[ ((32 + kT1 - kT2) >> 6) + pDst[i + kiStride2] ];  }} void_t 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