ref: 05993ab2bf0f6a2af4f65a0ccdae5bfa6f2fd179
dir: /codec/processing/src/scenechangedetection/SceneChangeDetection.cpp/
/*! * \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 "SceneChangeDetection.h" #include "../common/cpu.h" WELSVP_NAMESPACE_BEGIN #define HIGH_MOTION_BLOCK_THRESHOLD 320 #define SCENE_CHANGE_MOTION_RATIO 0.85f /////////////////////////////////////////////////////////////////////////////////////////////////////////////// CSceneChangeDetection::CSceneChangeDetection (int32_t iCpuFlag) { m_iCpuFlag = iCpuFlag; m_eMethod = METHOD_SCENE_CHANGE_DETECTION; m_pfSad = NULL; WelsMemset (&m_sSceneChangeParam, 0, sizeof (m_sSceneChangeParam)); InitSadFuncs (m_pfSad, m_iCpuFlag); } CSceneChangeDetection::~CSceneChangeDetection() { } EResult CSceneChangeDetection::Process (int32_t iType, SPixMap* pSrcPixMap, SPixMap* pRefPixMap) { EResult eReturn = RET_INVALIDPARAM; int32_t iWidth = pSrcPixMap->sRect.iRectWidth; int32_t iHeight = pSrcPixMap->sRect.iRectHeight; int32_t iBlock8x8Width = iWidth >> 3; int32_t iBlock8x8Height = iHeight >> 3; int32_t iBlock8x8Num = iBlock8x8Width * iBlock8x8Height; int32_t iSceneChangeThreshold = WelsStaticCast (int32_t, SCENE_CHANGE_MOTION_RATIO * iBlock8x8Num + 0.5f + PESN); int32_t iBlockSad = 0; int32_t iMotionBlockNum = 0; uint8_t* pRefY = NULL, *pCurY = NULL; int32_t iRefStride = 0, iCurStride = 0; int32_t iRefRowStride = 0, iCurRowStride = 0; uint8_t* pRefTmp = NULL, *pCurTmp = NULL; pRefY = (uint8_t*)pRefPixMap->pPixel[0]; pCurY = (uint8_t*)pSrcPixMap->pPixel[0]; iRefStride = pRefPixMap->iStride[0]; iCurStride = pSrcPixMap->iStride[0]; iRefRowStride = pRefPixMap->iStride[0] << 3; iCurRowStride = pSrcPixMap->iStride[0] << 3; m_sSceneChangeParam.bSceneChangeFlag = 0; for (int32_t j = 0; j < iBlock8x8Height; j ++) { pRefTmp = pRefY; pCurTmp = pCurY; for (int32_t i = 0; i < iBlock8x8Width; i++) { iBlockSad = m_pfSad (pRefTmp, iRefStride, pCurTmp, iCurStride); iMotionBlockNum += (iBlockSad > HIGH_MOTION_BLOCK_THRESHOLD); pRefTmp += 8; pCurTmp += 8; } pRefY += iRefRowStride; pCurY += iCurRowStride; } if (iMotionBlockNum >= iSceneChangeThreshold) { m_sSceneChangeParam.bSceneChangeFlag = 1; } eReturn = RET_SUCCESS; return eReturn; } EResult CSceneChangeDetection::Get (int32_t iType, void* pParam) { if (pParam == NULL) { return RET_INVALIDPARAM; } * (SSceneChangeResult*)pParam = m_sSceneChangeParam; return RET_SUCCESS; } /////////////////////////////////////////////////////////////////////////////////////////////// void CSceneChangeDetection::InitSadFuncs (SadFuncPtr& pfSad, int32_t iCpuFlag) { pfSad = WelsSampleSad8x8_c; #ifdef X86_ASM if (iCpuFlag & WELS_CPU_SSE2) { pfSad = WelsSampleSad8x8_sse21; } #endif } WELSVP_NAMESPACE_END