/*! * \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 "downsample.h"#include "cpu.h" WELSVP_NAMESPACE_BEGIN  /////////////////////////////////////////////////////////////////////////////////////////////////////////////// CDownsampling::CDownsampling (int32_t iCpuFlag) {  m_iCPUFlag = iCpuFlag;  m_eMethod   = METHOD_DOWNSAMPLE;  WelsMemset (&m_pfDownsample, 0, sizeof (m_pfDownsample));  InitDownsampleFuncs (m_pfDownsample, m_iCPUFlag);} CDownsampling::~CDownsampling() {} void CDownsampling::InitDownsampleFuncs (SDownsampleFuncs& sDownsampleFunc,  int32_t iCpuFlag) {  sDownsampleFunc.pfHalfAverage[0] = DyadicBilinearDownsampler_c;  sDownsampleFunc.pfHalfAverage[1] = DyadicBilinearDownsampler_c;  sDownsampleFunc.pfHalfAverage[2] = DyadicBilinearDownsampler_c;  sDownsampleFunc.pfHalfAverage[3] = DyadicBilinearDownsampler_c;  sDownsampleFunc.pfGeneralRatioChroma = GeneralBilinearAccurateDownsampler_c;  sDownsampleFunc.pfGeneralRatioLuma	 = GeneralBilinearFastDownsampler_c;#if defined(X86_ASM)  if (iCpuFlag & WELS_CPU_SSE) {    /*  sDownsampleFunc.pfHalfAverage[0]	= DyadicBilinearDownsamplerWidthx32_sse;      sDownsampleFunc.pfHalfAverage[1]	= DyadicBilinearDownsamplerWidthx16_sse;      sDownsampleFunc.pfHalfAverage[2]	= DyadicBilinearDownsamplerWidthx8_sse;*/  }  if (iCpuFlag & WELS_CPU_SSE2) {    //  sDownsampleFunc.pfGeneralRatioChroma = GeneralBilinearAccurateDownsamplerWrap_sse2;    //  sDownsampleFunc.pfGeneralRatioLuma   = GeneralBilinearFastDownsamplerWrap_sse2;  }  if (iCpuFlag & WELS_CPU_SSSE3) {    //  sDownsampleFunc.pfHalfAverage[0]	= DyadicBilinearDownsamplerWidthx32_ssse3;    //  sDownsampleFunc.pfHalfAverage[1]	= DyadicBilinearDownsamplerWidthx16_ssse3;  }  if (iCpuFlag & WELS_CPU_SSE41) {    //  sDownsampleFunc.pfHalfAverage[0]	= DyadicBilinearDownsamplerWidthx32_sse4;    //  sDownsampleFunc.pfHalfAverage[1]	= DyadicBilinearDownsamplerWidthx16_sse4;  }#endif//X86_ASM } EResult CDownsampling::Process (int32_t iType, SPixMap* pSrcPixMap, SPixMap* pDstPixMap) {  int32_t iSrcWidthY = pSrcPixMap->sRect.iRectWidth;  int32_t iSrcHeightY = pSrcPixMap->sRect.iRectHeight;  int32_t iDstWidthY = pDstPixMap->sRect.iRectWidth;  int32_t iDstHeightY = pDstPixMap->sRect.iRectHeight;   int32_t iSrcWidthUV = iSrcWidthY >> 1;  int32_t iSrcHeightUV = iSrcHeightY >> 1;  int32_t iDstWidthUV = iDstWidthY >> 1;  int32_t iDstHeightUV = iDstHeightY >> 1;   if (iSrcWidthY <= iDstWidthY || iSrcHeightY <= iDstHeightY) {    return RET_INVALIDPARAM;  }   if ((iSrcWidthY >> 1) == iDstWidthY && (iSrcHeightY >> 1) == iDstHeightY) {    // use half average functions    uint8_t iAlignIndex = GetAlignedIndex (iSrcWidthY);    m_pfDownsample.pfHalfAverage[iAlignIndex] ((uint8_t*)pDstPixMap->pPixel[0], pDstPixMap->iStride[0],        (uint8_t*)pSrcPixMap->pPixel[0], pSrcPixMap->iStride[0], iSrcWidthY, iSrcHeightY);     iAlignIndex = GetAlignedIndex (iSrcWidthUV);    m_pfDownsample.pfHalfAverage[iAlignIndex] ((uint8_t*)pDstPixMap->pPixel[1], pDstPixMap->iStride[1],        (uint8_t*)pSrcPixMap->pPixel[1], pSrcPixMap->iStride[1], iSrcWidthUV, iSrcHeightUV);    m_pfDownsample.pfHalfAverage[iAlignIndex] ((uint8_t*)pDstPixMap->pPixel[2], pDstPixMap->iStride[2],        (uint8_t*)pSrcPixMap->pPixel[2], pSrcPixMap->iStride[2], iSrcWidthUV, iSrcHeightUV);  } else {    m_pfDownsample.pfGeneralRatioLuma ((uint8_t*)pDstPixMap->pPixel[0], pDstPixMap->iStride[0], iDstWidthY, iDstHeightY,                                       (uint8_t*)pSrcPixMap->pPixel[0], pSrcPixMap->iStride[0], iSrcWidthY, iSrcHeightY);     m_pfDownsample.pfGeneralRatioChroma ((uint8_t*)pDstPixMap->pPixel[1], pDstPixMap->iStride[1], iDstWidthUV, iDstHeightUV,                                         (uint8_t*)pSrcPixMap->pPixel[1], pSrcPixMap->iStride[1], iSrcWidthUV, iSrcHeightUV);     m_pfDownsample.pfGeneralRatioChroma ((uint8_t*)pDstPixMap->pPixel[2], pDstPixMap->iStride[2], iDstWidthUV, iDstHeightUV,                                         (uint8_t*)pSrcPixMap->pPixel[2], pSrcPixMap->iStride[2], iSrcWidthUV, iSrcHeightUV);  }  return RET_SUCCESS;} int32_t CDownsampling::GetAlignedIndex (const int32_t kiSrcWidth) {  int32_t iAlignIndex;  if ((kiSrcWidth & 0x1f) == 0)	// x32    iAlignIndex	= 0;  else if ((kiSrcWidth & 0x0f) == 0)	// x16    iAlignIndex	= 1;  else if ((kiSrcWidth & 0x07) == 0)	// x8    iAlignIndex	= 2;  else    iAlignIndex	= 3;  return iAlignIndex;}  WELSVP_NAMESPACE_END