ref: 99faf1ec4a47c5362a6bde552d6097166e2fda16
dir: /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