ref: e61a6017f93a878b4ebd7b141223f873a56819a8
dir: /codec/processing/src/scenechangedetection/SceneChangeDetection.h/
/*!
* \copy
* Copyright (c) 2011-2013, 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.
*
* \file : SceneChangeDetection.h
*
* \brief : scene change detection class of wels video processor class
*
* \date : 2011/03/14
*
* \description : 1. rewrite the package code of scene change detection class
*
*************************************************************************************
*/
#ifndef WELSVP_SCENECHANGEDETECTION_H
#define WELSVP_SCENECHANGEDETECTION_H
#include "util.h"
#include "memory.h"
#include "cpu.h"
#include "WelsFrameWork.h"
#include "IWelsVP.h"
#include "common.h"
#define HIGH_MOTION_BLOCK_THRESHOLD 320
#define SCENE_CHANGE_MOTION_RATIO_LARGE 0.85f
#define SCENE_CHANGE_MOTION_RATIO_MEDIUM 0.50f
WELSVP_NAMESPACE_BEGIN
class CSceneChangeDetectorVideo {
public:
CSceneChangeDetectorVideo (SSceneChangeResult& sParam, int32_t iCpuFlag) : m_sParam (sParam) {
m_pfSad = WelsSampleSad8x8_c;
#ifdef X86_ASM
if (iCpuFlag & WELS_CPU_SSE2) {
m_pfSad = WelsSampleSad8x8_sse21;
}
#endif
#ifdef HAVE_NEON
if (iCpuFlag & WELS_CPU_NEON) {
m_pfSad = WelsProcessingSampleSad8x8_neon;
}
#endif
}
virtual ~CSceneChangeDetectorVideo() {
}
void operator() (uint8_t* pSrcY, int32_t iSrcStrideY, uint8_t* pRefY, int32_t iRefStrideY, uint8_t*& pStaticBlockIdc) {
int32_t iSad = m_pfSad (pSrcY, iSrcStrideY, pRefY, iSrcStrideY);
m_sParam.iMotionBlockNum += iSad > HIGH_MOTION_BLOCK_THRESHOLD;
}
protected:
SadFuncPtr m_pfSad;
SSceneChangeResult& m_sParam;
};
class CSceneChangeDetectorScreen : public CSceneChangeDetectorVideo {
public:
CSceneChangeDetectorScreen (SSceneChangeResult& sParam, int32_t iCpuFlag) : CSceneChangeDetectorVideo (sParam,
iCpuFlag) {
}
virtual ~CSceneChangeDetectorScreen() {
}
void operator() (uint8_t* pSrcY, int32_t iSrcStrideY, uint8_t* pRefY, int32_t iRefStrideY, uint8_t*& pStaticBlockIdc) {
int32_t iSad = m_pfSad (pSrcY, iSrcStrideY, pRefY, iSrcStrideY);
if (iSad == 0) {
*pStaticBlockIdc ++ = COLLOCATED_STATIC;
} else {
m_sParam.iFrameComplexity += iSad;
m_sParam.iMotionBlockNum += iSad > HIGH_MOTION_BLOCK_THRESHOLD;
*pStaticBlockIdc ++ = NO_STATIC;
}
}
};
template<typename T>
class CSceneChangeDetection : public IStrategy {
public:
CSceneChangeDetection (EMethods eMethod, int32_t iCpuFlag): m_cDetector (m_sSceneChangeParam, iCpuFlag) {
m_eMethod = eMethod;
WelsMemset (&m_sSceneChangeParam, 0, sizeof (m_sSceneChangeParam));
}
~CSceneChangeDetection() {
}
EResult 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 iSceneChangeThresholdLarge = WelsStaticCast (int32_t,
SCENE_CHANGE_MOTION_RATIO_LARGE * iBlock8x8Num + 0.5f + PESN);
int32_t iSceneChangeThresholdMedium = WelsStaticCast (int32_t,
SCENE_CHANGE_MOTION_RATIO_MEDIUM * iBlock8x8Num + 0.5f + PESN);
uint8_t* pRefY = NULL, *pCurY = NULL;
int32_t iRefStride = 0, iCurStride = 0;
int32_t iRefRowStride = 0, iCurRowStride = 0;
uint8_t* pRefTmp = NULL, *pCurTmp = NULL;
uint8_t* pStaticBlockIdc = m_sSceneChangeParam.pStaticBlockIdc;
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.iMotionBlockNum = 0;
m_sSceneChangeParam.iFrameComplexity = 0;
m_sSceneChangeParam.eSceneChangeIdc = SIMILAR_SCENE;
for (int32_t j = 0; j < iBlock8x8Height; j ++) {
pRefTmp = pRefY;
pCurTmp = pCurY;
for (int32_t i = 0; i < iBlock8x8Width; i++) {
m_cDetector (pRefTmp, iRefStride, pCurTmp, iCurStride, pStaticBlockIdc);
pRefTmp += 8;
pCurTmp += 8;
}
pRefY += iRefRowStride;
pCurY += iCurRowStride;
}
if (m_sSceneChangeParam.iMotionBlockNum >= iSceneChangeThresholdLarge) {
m_sSceneChangeParam.eSceneChangeIdc = LARGE_CHANGED_SCENE;
} else if (m_sSceneChangeParam.iMotionBlockNum >= iSceneChangeThresholdMedium) {
m_sSceneChangeParam.eSceneChangeIdc = MEDIUM_CHANGED_SCENE;
}
eReturn = RET_SUCCESS;
return eReturn;
}
EResult Get (int32_t iType, void* pParam) {
if (pParam == NULL) {
return RET_INVALIDPARAM;
}
* (SSceneChangeResult*)pParam = m_sSceneChangeParam;
return RET_SUCCESS;
}
EResult Set (int32_t iType, void* pParam) {
if (pParam == NULL) {
return RET_INVALIDPARAM;
}
m_sSceneChangeParam = * (SSceneChangeResult*)pParam;
return RET_SUCCESS;
}
private:
SSceneChangeResult m_sSceneChangeParam;
T m_cDetector;
};
IStrategy* BuildSceneChangeDetection (EMethods eMethod, int32_t iCpuFlag);
WELSVP_NAMESPACE_END
#endif